4300-7-20-04569270

Manual Part Number 04569270-3

AP4300 Three Phase

7.5 to 20kVA 50 or 60Hz.

Series AP4300 UPS

POWER PROTECTION

AP4300

AP4300UPS NORMAL NO ALARMShh:mm:ss dd:mm:yy

AP4300


Installation Operation and

Maintenance Manual

Table of Contents

Important Instructions For Safe Use . . . . . . . . . . . . . . . . . . . . . . . . . . v

Important Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Chapter 1 - General Description

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Equipment construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Principle of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Basic Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Primary Power Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Static switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Maintenance bypass line . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

System operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Operation during ‘normal’ conditions . . . . . . . . . . . . . . . . . . . . . 1-2Operation during input power supply failure . . . . . . . . . . . . . . . . . 1-2Operation during abnormal / fault conditions . . . . . . . . . . . . . . . . . 1-3Maintenance bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Electrical switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Circuit breakers and fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Control switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Internal Cutout Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Operator control switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Main control switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Input/Battery fuse holders . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5Output Off Switch (SW2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6LCD controls - on/off command. . . . . . . . . . . . . . . . . . . . . . . . 1-6Remote Stop Switch(optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6Optional operator controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6Emergency Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Operator Control & Display Panel . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7LCD Display, Controls & Screen . . . . . . . . . . . . . . . . . . . . . . . 1-7LED Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8Indicator Bars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9Alarm indicator & horn cancel button. . . . . . . . . . . . . . . . . . . . . 1-9

Chapter 2 - Operating Instructions

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

The Operating procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Fault Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Cold Start Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2NORMAL operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Setting Date, Time & Language . . . . . . . . . . . . . . . . . . . . . . . 2-4UPS Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Switching the Output Off/On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6Output Off Switch SW2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6Operation from the UPS control panel . . . . . . . . . . . . . . . . . . . . 2-6Switching with External Commands . . . . . . . . . . . . . . . . . . . . . 2-8

Input Power Supply Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8Input Supply Failure when On Load . . . . . . . . . . . . . . . . . . . . . 2-8Input Supply Failure when Off Load . . . . . . . . . . . . . . . . . . . . . 2-9

Applying Power to the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Starting up the UPS on battery ( ‘black start’) . . . . . . . . . . . . . . . . . . . 2-11General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

To Put the Load on Maintenance Bypass (MBP) . . . . . . . . . . . . . . . . . . 2-11

Removing Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

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Issue 3 (01/03/98) i

Chapter 3 - Installation Instructions

Safety warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1On Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Weight considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Extended battery option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Removal from Shipping Pallet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Units shipped with batteries . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Units shipped without batteries. . . . . . . . . . . . . . . . . . . . . . . . 3-5

Final Positioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Connecting the UPS Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9General introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Cable sizing consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Input supply protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Output Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Terminal connection points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Procedure for connecting the UPS to the power supply . . . . . . . . . . . . . . 3-12Common input/bypass supply system . . . . . . . . . . . . . . . . . . . . 3-12Split input/bypass supply . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Electrical Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Chapter 4 - Options and Features

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1Auto-restart Inhibit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1Common Bypass Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1Remote stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1Hot Standby Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Remote Control/ Communications Facilities . . . . . . . . . . . . . . . . . . . . . 4-2RS232 Interface and External Relay Board . . . . . . . . . . . . . . . . . . 4-2SNMP Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5Interface Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5Remote Alarm Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Extended Battery Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7Extended Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7Remote Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Power Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8Input Harmonic Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8Isolation Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8Filter &Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8External Bypass Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8Distribution Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9Frequency Changer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

AP4300

ii Issue 3 (01/03/98)

Chapter 5 - Troubleshooting

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Alarm indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Audible Alarm Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1LED Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Messages in the LCD Text Window . . . . . . . . . . . . . . . . . . . . . 5-2

Troubleshooting Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3Fault Records. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3Alarm Interpretation and Corrective action . . . . . . . . . . . . . . . . . . 5-3

Troubleshooting Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Checking the input and bypass circuit breakers, and battery fuses . . . . . . . . . 5-8Battery fuse check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8Circuit breaker check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Chapter 6 - Maintenance

Routine Maintenance Checks by the Operator . . . . . . . . . . . . . . . . . . . . 6-1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Checks at weekly intervals. . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Checks at monthly intervals . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Annual checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Annual Maintenance Checks by Service Engineer . . . . . . . . . . . . . . . . . . 6-4Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Chapter 7 - Liebert WarrantyLimited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Life Support Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

AP4300 Series UPS Specification · · · · · · · · · · · · · · · · · · · · · · · · · 8-1

Parameter Settings for the AP4300 · · · · · · · · · · · · · · · · · · · · · · · · 8-3

IOM Manual

Issue 3 (01/03/98) iii

This equipment has been designed and manufactured by Liebert,market leaders in the field of Uninterruptible Power Systems (UPS);

and, if installed and used correctly, will provide years of trouble-free operation.

This manual contains the information necessary for the correct operation and safe installation of theAP4300 Series UPS.

Please read the manual carefully before you attempt to install your UPS, or connect any equipment toit. For your safety it is important that you comply with the instructions for safe use. Please keep this

manual safe for future reference.

PLEASE NOTE:

The AP4300 Series UPS has been designed for Commercial/Industrial use only.

Please refer to warranty for restrictions on use.

This manual describes the following AP4300 series UPS models:

MODEL NUMBER DESCRIPTION PART NUMBERWithout Batteries With Batteries

AP4307 7.5kVA 50 Hz. UPS 75407002 75407102

AP4310 10kVA 50 Hz. UPS 75410002 75410102

AP4315 15kVA 50 Hz. UPS 75415202 75415302

AP4320 20kVA 50 Hz. UPS 75420202 75420302

AP4307 7.5kVA 60 Hz. UPS 75407602 75407652

AP4310 10kVA 60 Hz. UPS 75410602 75410652

AP4315 15kVA 60 Hz. UPS 75415602 75415652

AP4320 20kVA 60 Hz. UPS 75420602 75420652

Importatnt: All models in the UPS range are similar in operation and use. The illustrations in this manual depictthe 10kVA model (AP4310) unless otherwise stated.

If you encounter any problems with the equipment or the procedures contained in this manual you should seekimmediate assistance from the Liebert distributor from whom the equipment was purchased. Alternatively contact

Liebert's Customer Service & Support Department at the address shown below:

Technical Support Department,,Liebert Global Services

Globe Park, Marlow, Bucks,SL7 1YG, U.K.

Telephone +44 (0) 1628 403200 - Fax +44 (0) 1628 403203

This department also arranges service contracts and full commissioning service.

Liebert Corporation pursues a policy of continual product development and reserves the right to make changes toequipment design without notice.

©Copyright 1996 Liebert CorporationUnauthorised reproduction prohibited.

All rights reserved.

AP4300

iv Issue 3 (01/03/98)

Important Instructions For Safe Use

q The UPS must be commissioned by a Liebert approvedengineer before it is put into service. Failure to observe thiscondition will invalidate any implied warranty.

q Do not apply power to this equipment before it has beencommissioned by a Liebert approved engineer. He willvalidate the installation work and install ‘site information’into the microcontroller memory. This information is requiredto substantiate any warranty claims that might be made.

q These units contain no user serviceable parts.Under no circumstances attempt to gain access internally, dueto risk of electrical shock or burn.Do not continue to use your UPS if the front panel indicationsare not in accordance with these operating instructions, or theUPS performance alters in use.Refer all faults to your dealer.

q The UPS is for indoor use only.It must be protected from rain or excessive moisture andinstalled in a clean environment, free from flammable liquids,gasses, or corrosive substances.Do not put drinks, plants, or any other containers holdingliquids, on top of the unit.

q Competent personnel should be consulted if liquid spills intothe product.

q Ventilation grills are provided beneath (and on the left handside on 15/20kVA models) and at the rear of the cabinet. Donot block or cover these openings otherwise overheating mayoccur and UPS operation become unreliable.Never insert any object into these ventilation holes oropenings.

q Do not place magnetic storage media on top of the unit as itcan corrupt the data stored on them.

q The front control and display panel is designed for handoperation. Do not press with sharp or pointed objects.

q The following definitions are given for your information andsafety:

Operator/User

Personnel who have received instruction on the correctoperation of the UPS controls - limited to operation ofSwitch 1, Switch 2 and the Front Control Panel - notpermitted to remove any panels which are retained byscrews.

Competent Personnel

Personnel who are aware of the dangers appropriate toworking with hazardous voltages and are deemed to havesufficient technical skills/training to make electricalconnections, install batteries, close and open circuitbreakers/fuses etc. (i.e. a qualified electrician).

Service Personnel

Engineers who have received the relevant Liebert trainingand are password authorised.

ELECTROMAGNETIC COMPATABILITYThis equipment complies with the requirements of the

EMC Directive 89/336/EEC and the published technicalstandards. Continued compliance requires installation in

accordance with these instructions and the use ofmanufacturer approved accessories only.

WARNINGTHIS IS A CLASS A - UNINTERRUPTIBLE POWER

SYSTEM PRODUCT. IN A DOMESTICENVIRONMENT, THIS PRODUCT MAY CAUSE

RADIO INTERFERENCE, IN WHICH CASE, THEUSER MAY BE REQUIRED TO TAKE ADDITIONAL

MEASURES.

WARNINGTHIS UPS SHOULD NOT BE SUPPLIED FROM

ELECTRICAL POWER SYSTEMSOF THE ‘IT’ (IMPÉDANCE À TERRE) TYPE.(IEC 364 - ELECTRICAL INSTALLATION OF

BUILDINGS)

Note: Where use on ‘IT’ systems is required we offer theoptional input isolation transformersee chapter 4 for more information.

IOM Manual

Issue 3 (01/03/98) v

Important Symbols

Symbols used on the AP4300 series UPS are in twocategories SAFETY and OPERATIONAL, and are

listed below.

SAFETY SYMBOLS.

WARNING - HAZARDOUS VOLTAGE

WEIGHT

MAXIMUM OPERATINGTEMPERATURE 40oC

VALVE REGULATED LEAD ACIDBATTERY (VRLA)

WARNING - THE BATTERY CONTAINSCORROSIVE MATERIAL

OPERATIONAL SYMBOLS.

BATTERY ISOLATION FUSES

READ THE INSTRUCTION MANUAL

CAUTION: NOTE THE FOLLOWINGINSTRUCTION

INPUT AC SUPPLY

UPS AC OUTPUT

AP4300

vi Issue 3 (01/03/98)

Chapter 1 - General Description

1.1 Introduction

This chapter describes the purpose, principle of operation anduser controls of the AP4300 series on-line Uninterruptible PowerSystem (UPS).

The AP4300 series UPS is connected between a critical load,such as a computer, and its input power supply. Its purpose is toprovide the load with well regulated power under all rated loadand input supply conditions; i.e. the power provided by the UPSwill be protected from any voltage or frequency variations on theincoming power supply, or variations in the supply due toelectrical noise, and will continue during periods of input powersupply failure. A battery provides a standby power source for theUPS when the input a.c. supply fails.

1.2 Equipment construction

The equipment is constructed around a steel frame withremovable panels. The right-hand front panel can be lifted off togive easy access to the input & bypass circuit breakers and theoperator control switch, while protecting them from accidentaloperation. The left-hand front, and left-hand side panels arelocated on spigots and secured to the frame by screws.

A display and control panel on the front of the cabinet permits theoperator to monitor the performance of the UPS.

The cabinet houses both the power components and the batteries.It is carried on six wheels. Jacking feet help to support the UPS,and also prevent it from moving once it has been wheeled into itsfinal position. These feet are also used to secure the equipment toits shipping pallet during transit. Dimensions of all availablemodels are given in the Specification at the end of this manual.

Cooling is by a set of internal fans. Air is drawn in through theUPS and exhausted via ventilation grills in the rear and sidepanels. These areas must be kept free of anything that mayimpede the air flow into and out of the unit.

1.3 Principle of operation

1.3.1 Basic Concept

The UPS acts as an AC - DC - AC converter. The arrangement ofthe main components is shown as a block diagram in figure 1-2.

The AC - DC stage comprises three steps; in the first step the a.c. isconverted by a rectifier to d.c.; in the second step a resonantconverter converts the d.c. to high frequency a.c.; and in the thirdstep a rectifier converts the high frequency a.c. to high voltaged.c. A battery, to provide power when the input to the rectifierfails, is charged by a battery charger which is run from theresonant converter.

The DC - AC stage comprises a high frequency inverter whichconverts power from the high voltage d.c. rectifier back to a.c. atthe input supply voltage and frequency.

The use of a high frequency converter and a high d.c. voltagebring advantages of size and weight reduction while permitting awide input voltage range.

The main switch permits the operator to connect the outputterminals directly to an a.c. input supply via the maintenancebypass line, and a static switch permits the UPS to do the sameautomatically, if necessary.

1.3.2 Primary Power Path

The Input rectifier converts the incoming 3-phase 50Hz a.c. inputsupply to d.c. power at a nominal 580V at its output - i.e. theprimary d.c. busbar. The rectifier is uncontrolled and the voltageon the d.c. busbar will vary as the input voltage varies.

The resonant converter comprises a resonant circuit, isolationtransformer and a high frequency rectifier. The rectified 3-phaseinput supply is converted to single phase a.c. power at highfrequency, and then converted to high voltage d.c. by a high

frequency rectifier. The d.c. output is regulated by the convertercontroller to 800V d.c. which is ±400V, with respect to neutral, topower a high frequency transformerless inverter. The inverter

converts the 800V d.c. power to 3-phase, 50Hz, a.c. power at theoutput for use by the critical load. The control electronics ensurethat the inverter output is synchronised with the bypass supply.

Issue 3 (01/03/98) 1-1

AP4300

AP4300

UPS NORMAL NO ALARMShh:mm:ss

dd:mm:yy

Figure 1-1 Front view of the cabinet

Figure 1-2 UPS Basic block diagram

InputRectifier

StaticSwitch

ResonantCircuit

HighFrequencyRectifier

Inverter

Battery

BatteryCharger

BypassSupply

InputSupply

Outputto Load

MaintenanceBypass Line

Main SwitchSW1

High frequency harmonics are filtered so the load sees a clean,sinusoidal waveform with low harmonic distortion.

The battery charger is a.c. coupled to the converter and convertsthe high frequency sine wave to 435V d.c. for charging thebattery. A standard AP4300 system uses one set of thirty-two 12V batteries, connected in series, to provide a nominal batteryvoltage of 384V d.c. (the standard 15/20kVA models contain twosets of thirty-two 12 V batteries). When the input supply becomesunavailable the input rectifier stops maintaining the d.c. busvoltage. The battery then provides power to the primary d.c. bus,and the battery charger becomes inactive.

1.3.3 Static switch

The static bypass (SBP) switch is an electronically-controlled switchwhich, when turned on by the UPS, connects an a.c. input supplydirectly to the UPS output terminals (a load transfer). The load isthen supplied directly from the a.c. input supply. The a.c. supplyto the static switch, annotated ‘bypass supply’ in figure 1-2, canbe taken from the same source as that supplying the inputterminals, or may be taken from a separate source (Split Bypass).

Two conditions cause the static switch to perform a load transfer:

1) when the UPS control electronics automatically shut down the

inverter because of an overload condition or a UPS internal

failure such as an inverter fault; the static switch closes

simultaneously so as to transfer the load to the bypass supply.

2) where the bypass supply to the UPS is taken from a separate

source (Split Bypass), and the battery has discharged after

supplying power to the load following either a failure of the

input power supply to the input terminals or an input

overvoltage.

During start up and normal operation, the inverter control logicensures that, provided the bypass supply voltage and frequencyare within defined limits, the inverter output and the static bypasssupply will be synchronised within specified limits. Transfersbetween the inverter output and the static bypass supply can thentake place without a break in the power supply to the load.However, if the bypass supply voltage or frequency go outsidetheir set limits, the UPS can no longer automatically transfer theload to the bypass, and a message on the LCD display panelwarns of this condition.

Whenever power is supplied to the SBP during a start up or aftera bypass input failure, the control system checks that the supplyvoltage and frequency are within tolerance and that the phaserotation is correct, and then tests the operation of the SBP switchby briefly transferring to bypass. During the test a [UPS ONBYPASS] message is displayed on the LCD panel (see Section 1.7.1.-

LCD Display - Controls & Screen).

CautionWhen the load is being supplied through the static

switch or the maintenance bypass line, it is connecteddirectly to the input power supply and is therefore no

longer protected against power failures or power supplyfluctuations.

1.3.4 Maintenance bypass line

The maintenance bypass line provides a direct connectionbetween the load and the bypass supply for use when the UPS isshut down for maintenance or troubleshooting. The load is switchedto the maintenance bypass line manually with the main controlswitch, SW1.

Note: A manual transfer to bypass is not recommended if abypass alarm is present, unless a message on the LCD

display panel requests it.

1.4 System operation

The resonant converter, battery charger, inverter and static switchare controlled by a microcontroller board. Figures 1-3 to 1-7illustrate the load power paths through the UPS during its majoroperating modes. The resonant converter, the high frequencytransformer and the high frequency rectifier are shown as a singleblock in these diagrams. The solid black lines represent the‘active’ power paths.

1.4.1 Operation during ‘normal’ conditions

During normal operation, the input rectifier provides power, viathe resonant converter and high frequency rectifier, to theinverter. The inverter provides power to the load, and the batterycharger float charges the battery at 435V. See figure1-3

1.4.2 Operation during input power supply failure

If the a.c. input power supply to the UPS fails, the rectifier stopssupplying power to the inverter; the battery is automaticallyconnected to the d.c. busbar via an SCR so that the inverter takesits power from the battery, as shown in figure 1-4; and the batterycharger becomes inactive.

The period for which the load is supplied by the battery after ainput power supply failure (the Autonomy Time) depends uponboth the battery capacity, and the percentage of the rated loadbeing supplied. Refer to the equipment specification at the end ofthis manual.

1-2 Issue 3 (01/03/98)

Chapter 1 - General Description AP4300

Figure 1-3 UPS Normal operation

InputRectifier

StaticSwitch

ResonantConverter

Inverter

Battery

BatteryCharger

BypassSupply

InputSupply

Outputto Load


Main SwitchSW1

Figure 1-4 Operation from the battery after aninput power supply failure

InputRectifier

StaticSwitch

ResonantConverter

Inverter

Battery

BatteryCharger

BypassSupply

InputSupply

Outputto Load


Main SwitchSW1

When the battery is fully discharged, the action taken by the UPSdepends on whether the bypass supply is taken from the samesource as the main input (common bypass), or from a separatesource (split bypass).

Units with split bypass

When the end of battery discharge is reached in a split bypasssystem, the UPS transfers the load to the bypass supply, closingthe static switch and switching off the battery SCR, as shown infigure1-5.

CautionWhen the load is being supplied from the bypass line

through the static switch, it is connected directly to theinput power supply and is therefore no longer protected

against input power supply disturbances.

If, later, the input power supply returns, the input rectifier powersup and the UPS automatically re-starts the inverter, opening thestatic switch to transfer the load back to the inverter. The systemis then in the normal operating condition and recharging thebatteries.

Units with common bypass

When the end of battery discharge is reached in a common bypasssystem, the inverter shuts down and power to the load is lost.

Automatic restart facility:

A UPS with a common bypass will automatically restart if theinput power supply returns after the autonomy time expires,provided the control switches have not been operated in themeantime.

Note: The auto-restart facility may be disabled by an entryon the control panel. If the auto-restart facility has beendisabled, a message on the LCD panel will indicate thiswhen the supply returns. Restart the UPS by using the

controls on the LCD panel to switch the output on. Refer toChapter 2 - Operating Instructions.

1.4.3 Operation during abnormal / fault conditions

If the inverter develops a fault, or suffers a severe overload orovertemperature condition, the UPS automatically transfers thecritical load to the bypass supply by closing the static switch andshutting down the inverter – see figure1-6. The battery chargerwill remain active.

1.4.4 Maintenance bypass.

Setting the main control switch, SW1, to Maintenance Bypassconnects the UPS output terminals directly to the bypass supplyterminals via the internal maintenance bypass line, as shown infig. 1-7, so that the critical load is powered from the bypasssupply. The inverter and converter are shut down and the staticbypass switch disabled.

This isolates the critical load totally from the inverter output so thatUPS faults can be investigated without affecting the power supplyto the load. Refer to the section on the Operator's Controls laterin this chapter for details.

CautionWhen operating on maintenance bypass power, the loadis unprotected against input power supply disturbances.

Therefore the load user should be informed when thismode is selected.

1.5 Electrical switches

1.5.1 Circuit breakers and fuses

Circuit breakers CB1 - CB3 connect the supply from the bypassterminals to the static switch; circuit breakers CB4 - CB6 connectthe supply from the input terminals to the UPS; and the batteryfuses FS1, FS2 are contained in fuse holders carried in a fusedswitch which disconnects the UPS from its batteries (FS3 in the15/20kVA units is used to disconnect the second set of batteriesonly). The fuses are isolated from the circuit when the switch isopened so that the fuses can be replaced safely.

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IOM Manual Chapter 1 - General Description

Figure 1-6 UPS Operation on static bypass after an

inverter fault condition.

InputRectifier

StaticSwitch

ResonantConverter

Inverter

Battery

BatteryCharger

BypassSupply

InputSupply

Outputto Load

Maintenance Bypass LineMain Switch SW1

Figure 1-7 UPS Maintenance Bypass Selected.

InputRectifier

StaticSwitch

ResonantConverter Inverter

Battery

BatteryCharger

BypassSupply

InputSupply

Outputto Load

Maintenance Bypass Line Main Switch SW1

Figure 1-5 Split Bypass - Load is transferred to bypass when

end of battery discharge is reached.

InputRectifier

StaticSwitch

ResonantConverter Inverter

Battery

BatteryCharger

BypassSupply

InputSupply

Outputto Load


Main SwitchSW1

CautionFuse holders and circuit breakers should be

opened/closed only by competent personnel whenrequired. It is not necessary to open or close them

during normal operation.

1.5.2 Control switches

The UPS is controlled by the ‘Main Control Switch’ (SW1), which isa four position switch, and an ‘OUTPUT OFF’' switch (SW2). The locationand use of these switches is described later in this chapter.The UPS can also be controlled from the front panel -see section 1.7 .

1.5.3 Internal Cutout Relays

Input Overvoltage Cutout

If the input voltage exceeds 477V, the UPS will isolate the powercomponents from the input by opening the Input OvervoltageCutout Relay, located in the input circuit between the circuitbreakers (CB4 to CB6) and the input rectifier, and will switchto battery operation; refer to Section 1.4.2. - Operation during

input power supply failure for details. Powering the load from theMaintenance Bypass line is not recommended when this relay hasopened in a common bypass system.

Inverter Output Cutout

If an internal fault turns off the resonant converter, the UPS willtransfer the load to bypass automatically. The Inverter OutputCutout Relay, located in the circuit between the inverter outputand the rotary switch, SW1, will open to protect the inverter fromthe possibility of damage due to reverse power from the bypassline.

1.6 Operator control switches

The equipment contains two switches that are used by theoperator, in addition to the pushbuttons on the display panel.These are the Main Control switch and the Output Off switch.Their locations are shown in figs.1-9 & 1-16.

Note: If any alarms are triggered when SW1 is at OFF orMAINT, ignore the alarm, otherwise refer to Chapter 5 -

Troubleshooting for the appropriate action.

1.6.1 Main control switch

The Main Control Switch (SW1) is a four position rotary switchfitted behind the right hand front panel on the front of the UPS(see fig.1-9). The panel is held in place by means of two angledslots cut in each side of the panel. These slots hook overcorresponding spigots on the cabinet frame. Remove this panel by

pushing up on its lower edge and lifting it away from the cabinet, asshown in fig.1-8. The four switch positions are: OFF;

MAINTENANCE (MAINT); TEST; and UPS.

Off position

SW1 is turned to OFF when the output must be turned off. In the OFF

position all SW1 contacts are open (fig.1-10) and there is no powerat the UPS output terminals.

Maintenance position

When SW1 is set to MAINT, it connects the UPS output terminalsdirectly to the bypass supply (fig.1-11) if this supply is available. Itwill power the critical load while leaving the UPS shut down formaintenance or repairs on-site.

1-4 Issue 3 (01/03/98)


AP4300

AP4300UPS NORMAL NO ALARMShh:mm:ss

dd:mm:yy

AP4300


Figure 1-8 Removing the front panel to get access to the mainswitch (SW1).

AP4300

ESC

LOAD nn.n KVAO/P VOLTS nnn VacUPS NORMAL NO ALARMShh:mm:ss dd-mm-yy


TESTMAINT

SW1

OFF UPS

TESTMAINT

SW1

OFF(0)

OFF(0)

UPS

Figure 1-9 View of the cabinet with the front panel removed toshow the location of the main control switch, (SW1).

SW1

TESTMAINT

OFF UPS

TESTMAINT

OFF UPS

Figure 1-10 Power off & SW1 at OFF

UPSPowertrain

Staticbypass

To Load

SW1

TESTMAINT

OFF UPS

TESTMAINT

OFF UPS

Figure 1-11 On maintenance bypass

UPSPowertrain

Staticbypass

To LoadMaintenance bypass

Test position

When set to the TEST position the UPS power train neutral isconnected to the neutral line. The load continues to be powered viathe maintenance bypass (MBP), and the UPS control system starts totest the converter, battery charger, inverter, phase rotation and staticbypass switch in sequence. The default window shows themessage Testing. Each section is enabled when the tests on it arecompleted satisfactorily. Finally, if no faults are found, the staticbypass switch closes automatically. The default window messagechanges to Tests Passed, Turn SW1 to UPS.

Note that the load is still powered via the MBP line (fig.1-12),and will not be connected to the UPS output until switch SW1 hasbeen set to ‘UPS’.

If any problems are found, they will be indicated on the displaypanel, and the UPS will inhibit the transfer of the load to theinverter. This ensures that if SW1 is subsequently set to ‘UPS’while a fault exists, the load will not be supplied by the inverter butby the static bypass. Faults found can then be corrected before theycan affect the power supply to the load. This position is also usefulfor testing the UPS manually after repairs, while the UPS continuesto be powered from the maintenance bypass.

UPS position (normal operation)

When SW1 is set to UPS, the load switches from the maintenance lineto the UPS output without a break in the power supply to theload. A mechanical overlap ensures break free switching; i.e. theload is connected briefly to both the maintenance line and thestatic bypass line during the switchover with SW1.

The load is now supplied by the static bypass line alone (fig.1-13). Finally, the control system, after a six second delay, transfersthe load from the static bypass line to the inverter (fig.1-14).

1.6.2 Input/Battery fuse holders

The UPS circuit breakers for the input and bypass supplies and thefused switches for the battery fuses, (fig.1-15), are located behind thefront detachable panel, (fig. 1-8). These serve as switches whichshould be operated only by competent personnel, when required.There is no need to open or close them during normal operation.

Note: To refit the front panel, first engage the slots on the panelwith the corresponding spigots on the cabinet, and then allow

the panel to drop into place.

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SW1

TESTMAINT

OFF UPS

TESTMAINT

OFF UPS

Figure 1-12 Tests OK; static bypass turned on.

UPSPowertrain

Staticbypass


SW1

TESTMAINT

OFF UPS

TESTMAINT

OFF UPS

Figure 1-13 On UPS

UPSPowertrain

Staticbypass


SW1

TESTMAINT

OFF UPS

TESTMAINT

OFF UPS

Figure 1-14 On UPS

(After transfer to UPS - i.e. normal operation)

UPSPowertrain

Staticbypass


TEST

MAINTMAINT

O/P OFF

UPS

AP4300


TESTMAINT

SW1

OFF(0)

OFF(0)

UPS

INPUTBYPASSBATTERYFUSES

CB2 CB3CB1 CB5 CB6CB4FS2FS1

Figure 1-15 Input, bypass and battery fuse locations

1.6.3 Output Off Switch (SW2)

CautionPressing the Output Off pushbutton will turn the

inverter off and remove power from the load.

When this switch ispressed, the controlsystem shuts down theinverter and disablesthe static bypassswitch. The UPSdisplay remains active.The resonant converteris also turned off, but isswitched on for 5minutes at 1 hourintervals to permitbattery charging. Referto later sections forinformation on how torestore power to theload. The Output Offswitch is mounted onthe back panel of theUPS and is recessedinto its housing toreduce the chance ofaccidental operation.

1.6.4 LCD controls - on/off command

CautionSelecting Output Off will turn the inverter off and

remove power from the load.

The Command feature, accessed from the main menu, is provided sothat the operator can switch the UPS on and off by using thecontrols on the LCD display panel. This permits the operator toturn the UPS OFF as part of its day-to-day operation – at the endof the working day for example - without having to repeat the fullstart-up sequence to turn the UPS back ON.

When the output is selected OFF the microcontroller removespower to the load in the same way as when the Output Off switchis pressed and continues to monitor the UPS. When the output is setON, the UPS control system tests the converter, inverter, and staticbypass switch in sequence before switching on the converter andinverter. The UPS output and LED indications then return tonormal.

1.6.5 Remote Stop Switch(optional)

A connection is provided for a switch, which can be locatedremote from the UPS, and which has the same function as theOutput Off switch. When it is operated it shuts down the inverter,and inhibits the static switch so that power is removed from theload.

CautionPressing the Remote Stop pushbutton

will turn the inverter off and remove power from theload.

WARNINGThe mains input, bypass input and battery terminals

still carry lethal voltages after pressing the Remote Stopswitch. Do not remove covers from these parts. Only

competent personnel should remove external panels heldin place with screws.

The Remote Stop switch can be either a latching or a non-latchingswitch. However it has the highest priority so that, if a latchingswitch is used, it must be reset after operation before the UPSoutput can be enabled from any source.

1.6.6 Optional operator controls

The operation of the UPS can be controlled from externallocations if one or more of the available communication options isconnected. Instructions from a remote terminal will be effective onlywhen they are enabled. Any subsequent commands, from whateversource, will over-ride previous commands - but see the notebelow.

Note: Any OFF command will have a higher priority than anON command from another origin. If the UPS does not

respond to the operator controls as expected, ensure that allOFF commands from any connected options have been

unlatched

The additional options are described in Chapter 4 - Options.

1.6.7 Emergency Shutdown

In order to remove power from the output in an emergency, moveSW1 rapidly to position OFF.

1-6 Issue 3 (01/03/98)


Figure 1-16 View of the back of the

cabinet showingthe location of the

Output Off switch, (SW2).

SW2

1.7 Operator Control & Display Panel

An operator control and display panel, shown in fig.1-17, is fittedon the front of the UPS. It permits the operator to select textdisplays from a menu of options for display on an LCD (LiquidCrystal Display) screen by means of pushbuttons on the panel,and provides information on the basic operational and alarmstatus of the UPS by means of LEDs (Light Emitting Diodes)which can be on, off or flashing on/off.

The operator panel can be considered as two zones. The LEDdisplays form an upper zone, which comprises five separate areas,and the LCD screen and its associated cursor control pushbuttonsform a lower zone. These parts of the screen are identified bylabels in fig.1-17. The key to these labels is given below:

Key to Labels in Fig. 1-17

LED Display LCD & Controls

1. Monitor mimic 6. Cursor up Pushbutton

2. Battery Status 7. Cursor down Pushbutton

3. Load Status 8. LCD Screen

4. Battery Charge State 9. Enter Pushbutton

5. Alarm Indicator/CancelButton

10. Escape Pushbutton

1.7.1 LCD Display, Controls & Screen

Function

The LCD zone consists of an LCD screen with 4 rows of 20characters, and four pushbuttons, as shown in fig.1-17. Thepushbuttons permit the operator either to select options from amenu for display on the screen, or else to change the value ofcertain parameters. The screen shows messages which, forexample, provide status information or, when an alarm occurs,indicate the reason for the alarm.

LCD Screen Pushbuttons

ENTER

Pressing ENTER, when selecting options, displays thenext window in the direction of the arrows on themenu map. The next window is determined by theoption which has been selected in the present window.

When setting parameters, it saves the new parameter values.

ESCAPE

Pressing ESCAPE cancels the most recent actions; i.e.when selecting options it returns the previous windowto the screen; when setting parameters, it exits thewindow without saving the new settings.

UP

The UP pushbutton moves a cursor up the screen overoptions offered on certain windows, and moves arectangular cursor to the next digit on the right whenchanging parameter values in others.

DOWN

The DOWN pushbutton moves a cursor down thescreen over options offered on certain windows, andchanges parameter values in others.

The Menu Options

A map of the routes to the options offered by the menu isprovided in fig.2-2. Options include windows which show statusinformation and windows which permit data to be entered, orparameters for equipment control to be set. The menu map showsthat the routes pass from the main menu through differentintermediate windows to reach the option targeted. The diagramshows each of the windows in the format in which it appears onthe LCD screen. The initialising, default & main menu windowsare described below.

LCD Display Panel Messages

• Initialising Window:

After first connecting power to the UPS (with switch SW1 OFF),the message:

AP4300INITIALISINGPLEASE WAIT

will appear on the LCD screen. It persists for about five secondswhile the control firmware is loaded. It is then followed by amessage showing what the next action should be.

• Default Window:

The message shown below, will be seen on the default screenwhenever the UPS is operating normally (see fig.1-18):

AP4300

UPS NORMAL NO ALARMSdd-mm-yy hh:mm:ss

The top line gives the UPS model number; the third line displaysthe UPS operational status and indicates alarm conditions whenthey occur; and line four normally shows the time and date. If UPor DOWN pushbutton symbols, or both: appear between thetime and date, as shown in the INTERNAL SHUTDOWNwindow in fig.2-2, then two or more faults have been detected.Use the UP/DOWN pushbuttons to scroll through the alarmmessages. Refer to Chapter 5 - Troubleshooting, for moredetails.

Issue 3 (01/03/98) 1-7


ESC

????????????????????????????????????????????????????????????????????????????????

????????????????????????????????????????????????????????????????????????????????

1 2 543

6

7

8

9

10

Figure 1-17 Identification of the main parts ofthe operator

panel

ESC

• Main Menu Window:

The main menu is selected from the default window by pressingthe enter key:

STATUSCOMMANDSSETUPMAINTENANCE

The four windows accessed from the main menu offer furtheroptions which are described in the relevant chapters of thismanual.

The STATUS option gives access to windows which show thepresent values of measured parameters such as input & outputvoltages and current, load etc. These parameters are useful whendetermining the state of the UPS or the causes of alarms, and aredescribed in more detail in Chapter 6 - Maintenance.

The COMMANDS option permits the operator to switch the UPSoutput on and off; to set times when the UPS output switches onand off; to set the conditions when the UPS will respond to ashutdown command from an external system; and to initiatebattery tests. See Chapter 2 - Operating Instructions.

The SETUP option permits the operator to set the date, time andthe language in which messages are displayed. Their use isdescribed in Chapter 2 - Operating Instructions.

The MAINTENANCE option provides the route to the windowswhere a service engineer can configure the UPS to suit itsoperational environment. Entry to these windows requires apassword. This manual does not provide servicing instructionsand the options accessed from this window are therefore notshown on the menu map in fig.2-1. Only trained service engineersshould be authorised with a password. Refer to theCommissioning Manual for details.

Option Selection Mode: If a window from which options can beselected is displayed, a pair of indicator arrows appear at the topof the screen:

The UP /DOWN pushbuttons move these up and down the screenover the options. When the arrows point at a chosen option, pressENTER to display the next window. Press ESCAPE to return theprevious window to the screen.

Parameter Change Mode: If a window where a parameter can bechanged is displayed, the cursor appears as a flashing rectanglesuperimposed on the first digit of the parameter. The function ofthe pushbuttons in this mode of operation is shown below:

SELECT SETADJUST CANCELDD-MM-YY HH:MM:SS0-00-00 00:00:00

Press the DOWN pushbutton to adjust the value of the digitby increasing it. If it goes past the end of its range, it will returnto zero. When the digit is at its required value, press the UPpushbutton to select the displayed value and move the cursorto the next digit. When all digits have been assigned, pressENTER to set, i.e. save, the new value for the parameter: theprevious window returns to the screen. Pressing ESCAPE atany time cancels the new settings and returns the previouswindow to the screen without saving any of the changes.

1.7.2 LED Displays

The basic operational status of the UPS is displayed by means ofLEDs in the five areas, (items 1-5), already identified in the upperzone of the operator panel in fig. 1-17. The LED display permitsthe status of the UPS to be seen when LCD screens other than thedefault window are in use.

The LEDs are identified in fig. 1-18. The meaning of the LEDswhen ON is summarised in the table below.

Meaning of the Operator Panel Indicator LEDs(refer to fig.1-18)

Key LED Colour NormalState

Indication when ON

1 InputPowersupply

Green on Input power supply present

2 StaticSwitch

Amber off Load on bypass

3 Inverter Green on Load on UPS

4 BatteryStatus

Amber off Battery is discharging -UPS is ‘on battery’

5 OverloadIndicator

Amber off Output has exceeded 100%of full load

6 ChargerFault

Amber off Charger is faulty (LEDflashes)

7 Alarm Red off A condition requiringattention has developed(LED flashes) (see below)

8 BatteryCapacityIndicator

Green on State of charge of battery;each of the 5 LEDsrepresents 20 % of batterycapacity (see below)

9 O/PLoad

Indicator

Green on Output load as % full load;each of the 5 LEDsrepresents a fraction of theload (see below)

A number of these LEDs indicate alarms, when they occur, byflashing on/off. Several of these alarms are also accompanied byan audible warning from the alarm horn. In all cases a message inthe LCD default eason for the alarm. Details are given inChapter 5 - Troubleshooting.

1-8 Issue 3 (01/03/98)


ESC

AP4300


AP4300


1 2 3 4 59 8 6 7

Figure 1-18 - Identification of the LEDs on the operator panel

ESC

1.7.3 Indicator Bars

Output load indicator

These six LEDs operate as a percentage load indicator bar andindicate the load on the phase with the highest load.

The left-most five LEDs are green and illuminate progressively asthe load increases. The load ranges are 10-20, 20-40, 40-60, 60-80 and 80-100 percent of the UPS full load rating. The sixth LEDis amber and illuminates when the output of any phase exceeds100 percent. This LED is therefore normally accompanied by anOVERLOAD alarm and an audible warning.

If an overload occurs, the UPS automatically transfers the load tothe static bypass supply after a time interval which depends onthe overload magnitude - the greater the overload, the shorter thetime interval.

Battery Capacity Indicator

The first five LEDs are green and operate as a bar indicator toshow the state of battery charge when charging, and to showbattery capacity remaining when the UPS is operating on batterypower. The sixth LED is amber and flashes to indicate when thereis a charger fault.

During battery charging the bar indicator LEDs lightprogressively from left to right until all five LEDs are ON, andthe battery is fully charged; the battery charger then turns OFF.The time taken to reach full charge will depend on the load: thehigher the load, the higher the rate of charge.

When the battery is fully charged, a ‘burn and coast’ routine putsthe battery on charge for one hour every twelve hours. Battery lifeis prolonged when it is kept fully charged in this way.

When the UPS is operating on battery power, the battery barindicates the battery capacity remaining. The bar indicator LEDsprogressively extinguish as the battery discharges, each LEDrepresenting approximately 20% of the rated autonomy time atthe current load.

1.7.4 Alarm indicator & horn cancel button

The audible alarm cancel button carries a red LED that flasheson/off whenever the UPS detects certain fault conditions.

Several fault conditions are also accompanied by an insistentaudible warning signal which can normally be cancelled bypressing the horn cancel button. The LED will continue toindicate the alarm until the fault condition has cleared. Details ofthe audible alarms are given in Chapter 5 - Troubleshooting.

Issue 3 (01/03/98) 1-9


Figure 1-19 Output load indication

Figure 1-20 Battery autonomy indicator

Figure 1-21 Fault indicator and audible alarm cancel button

1-10 Issue 3 (01/03/98)


Chapter 2 - Operating Instructions

2.1 Introduction

WARNINGOPERATION OF THE CONTROL SWITCH (SW1)

FROM THE “UPS” (ON) POSITION THROUGH TOTHE “OFF” POSITION PASSES THROUGH BOTH

THE “TEST” AND “MAINT” POSITIONS. THEINTERNAL MAINTENANCE BYPASS SYSTEM IS

THEREFORE ACTIVATED DURING THISOPERATION.

IF THE UPS HAD PREVIOUSLY BEEN SWITCHEDOFF BY EITHER THE LOCAL OUTPUT OFF SWITCH

(SW2) OR BY A REMOTE STOP PUSHBUTTONSWITCH, TURNING THE CONTROL SWITCH (SW1)FROM THE “UPS” (ON) POSITION TO THE “OFF”

POSITION WILL ACTIVATE THE INTERNALBYPASS SYSTEM AND THEREFORE APPLY POWER

SUPPLIES TO THE LOAD.IN ORDER TO AVOID ACCIDENTALLY APPLYING

POWER SUPPLIES TO THE LOAD VIA THEINTERNAL BYPASS SYSTEM, ISOLATE THE POWER

SUPPLIES TO THE BYPASS SYSTEM BEFORETURNING THE CONTROL SWITCH (SW1)

THROUGH THE “TEST” OR “MAINT” POSITIONS.

This chapter describes how to switch the UPS manually into anyone of the following five operating modes:

• Normal - i.e. supplying uninterruptible power to the load.

• Output Off - i.e. UPS on, but no power supplied to theload.

• On Maintenance Bypass - i.e. load isolated from inverter.The load is powered directly from the input power supply.

• Power off - i.e. UPS switched off and isolated from the mainssupply.

• On Battery - i.e. UPS running on battery: selectedautomatically after a input power supply failure.

The UPS can also be started up manually On Battery with theUPS controls - i.e. a ‘black start’.

Note: As soon as power is connected to the UPS themicrocontroller and UPS display panel become active and

LED1 will switch ON.

Details of the Control switches, LED display panel and LCDscreen referred to in the procedures can be found in Chapter 1 -

General Description.

The control switches are accessed by removing the right handfront panel. The panel is held in place by means of two angledslots cut in each side of the panel. These slots hook overcorresponding spigots on the cabinet frame. Remove this panel bypushing up on its lower edge and lifting it away from the cabinet,as shown in fig.2-1.

Issue 3 (01/03/98) 2-1

AP4300

ESC



TESTMAINT

SW1

OFF(0)

OFF(0)

UPS

AP4300


TESTMAINT

SW1

OFF UPS

SW2

Figure 2-1 Location of the main control switch, (SW1) and Output off switch (SW2).

2.2 The Operating procedures

2.2.1 Introduction

The procedures described in this chapter have been categorisedinto two sections as listed below, (a) for operator use and (b) foruse by personnel deemed competent.

(a) Operator Procedures

1. Starting up the UPS: i.e. cold start (p.2-2).

2. Setting Time, Date and Language (p.2-4).

3. Switching power to the load on or off without ever switching

off the UPS; includes output off switch operation (p.2-6),

control panel commands (p.2-6), and commands from

external systems (p.2-8).

4. Running the UPS On Battery; i.e. when the supply fails (p.2-8).

(b) Competent Personnel Procedures

1. Applying Power to the UPS (p.2-10).

2. Starting up the UPS on battery (’black start’) (p.2-11).

3. Powering the load via the Maintenance Bypass (p.2-11).

4. Removing power from the UPS (p.2-12).

These procedures must be followed without deviating from themin any way. They comprise a sequence of actions and adescription of the corresponding LED indications and LCDmessages that appear on the screen.

2.2.2 Fault Indications

The UPS monitors its internal operation and input/outputparameters continuously, and indicates any abnormal condition onthe operator display panel. Abnormal conditions can be causedeither by an internal malfunction within the UPS (UPS faults), orby problems with the power supply or the load (external faults).When a fault condition is detected, an alarm is triggered.

Alarms are indicated by a warning horn and/or one or moreflashing LEDs on the display panel. A message on the LCDscreen identifies the reason for the alarm. The warning hornsounds when an alarm requires immediate attention from theoperator.

Refer to Chapter 5 - Troubleshooting for a description of thealarms and the action to be taken in response to them.

Important notes

Note 1: The operator controls and LED indicators referredto in these procedures are fully described in Chapter 1.

Note 2: When applying power to the UPS, if the displays donot respond as indicated in the procedures, and unprotected

power to the load is required, select MAINTENANCE andseek assistance. Otherwise shut down the UPS immediatelyby turning switch SW1 to OFF, and then remove power from

the UPS.

2.3 Cold Start Procedure

Starts up the UPS from the DE-ENERGISED or

MAINTENANCE states, and takes it to the NORMAL state.

WARNINGTHE FOLLOWING PROCEDURE WILL APPLYPOWER TO YOUR LOAD AND DISTRIBUTION

SYSTEMS. ENSURE IT IS SAFE TO DO SO.

During start-up, the LEDs indicate the current UPS state. Analarm is triggered if a fault is found, and the start up screenindicates the position to which the switch should then be set.Press the alarm reset push-button on the display panel to cancelthe audible alarm, if required. Refer to Chapter 5 -

Troubleshooting for more information about alarms.

1. Pre-Start checks

Remove the UPS front ‘lift-off’ panel; see fig.2-1.

The main control switch (SW1) is either in the OFF or

MAINT position. If it is in the OFF position proceed as

below; otherwise proceed to step 3.

Ensure that the input and bypass circuit breakers and battery

fuse holders are CLOSED. If they are open, refer to section

2.7.

Ensure that the UPS input power supply, and bypass supply

where a split bypass system is used, are switched ON

externally. If they are off, refer to section 2.7.

The LCD display will be displaying the start up screen, and a

message indicates that the rotary switch (SW1) should be

turned to TEST:

AP4300TURN SW1 TO TESTUPS OUTPUT OFF14-02-95 14:35:00

2. Select MAINTENANCE with SW1.

The load is connected directly to the bypass supply via the

MBP line, and the third line on the LCD display changes:

AP4300TURN SW1 TO TESTON MAINTENANCE B/P14-02-95 14:35:00

3. Select TEST with SW1.

The UPS starts a self-test routine while the load is supplied by

the MBP line. The message on the start up screen on the LCD

Display Panel indicates that testing is in progress:

TESTINGPLEASE WAITON MAINTENANCE B/P14-02-95 14:35:00

2-2 Issue 3 (01/03/98)

Chapter 2 - Operating Instructions AP4300

CautionWait until the message:

turn SW1 to ******appears on the display before

taking any further action.

If testing fails at any stage, an error message appears on line 1

of the start up screen, together with an error code:

TESTS ABORTED NNTURN SW1 TO MAINTON MAINTENANCE B/P14-02-95 14:35:00

The two hexadecimal digits (indicated by: NN) in the error

message permit the cause of the test failure to be identified

(see Chapter 5 - Troubleshooting).

If the tests proceed satisfactorily, the converter starts up,

followed by the inverter a few seconds later; the inverter LED

switches on; and the UPS fans start. The SBP switches on to

transfer the UPS output to bypass; the bypass LED switches

on; and the inverter LED switches off. Note that the load is

not supplied via the SBP at this stage because the UPS output

has not been connected to the load; i.e. SW1 has not been

switched to UPS. The load is still connected to the MBP.

The message on the screen indicates that SW1 should be

turned to UPS.

TESTS PASSEDTURN SW1 TO UPSON MAINTENANCE B/P14-02-95 14:35:00

4. Select UPS with SW1.

The load is connected to the UPS output in a break free

operation and is initially supplied by the static bypass line.

Provided the bypass and inverter outputs are synchronised

and within specified limits, and there is no overload, the load

is transferred to the inverter after a 6 second delay. The

bypass LED switches OFF, and the inverter LED switches

ON.

The LCD Display Panel startup screen is replaced by the

‘Default’ screen, shown below:

AP4300

UPS NORMAL NO ALARMS14-02-95 14:35:00

5. Refit the UPS front panel.

The panel is held in place by means of two angled slots cut in

each side of the panel, as shown in fig.2-1. Present the panel

to the UPS so that these slots hook over corresponding spigots

on the cabinet frame. Let the panel drop into place. If

necessary press its top edge firmly back into the cabinet.

2.3.1 NORMAL operation

During ‘NORMAL’ operation LED1 is ON, to indicate that theinput power supply is available (and within specification) andLED3 is ON to indicate that the UPS is supplying the load.The battery capacity bar indicates the charge in the battery.The percentage load bar indicates the proportion of the maximumload being supplied.

Note: When the UPS is started from cold for the first time,the indicated battery capacity may not be as specified untilthe battery is fully charged; i.e. until it has been on charge

for twenty-four hours.

Issue 3 (01/03/98) 2-3

IOM Manual Chapter 2 - Operating Instructions

2.4 Settings

2.4.1 Introduction

At any time after power has been applied to the UPS successfully,the operator adjustable settings - date, time and language - can bereset if necessary. The date and time are included on the defaultand alarm history screens. The language which is selecteddetermines which language is used for displaying LCD messages.

2.4.2 Setting Date, Time & Language

When it is necessary to change the date, time or language used inthe screens, display the default window, and press the ENTER

pushbutton to display the main menu window:


Use the UP / DOWN pushbuttons to point at the SETUP option in themain menu, and press ENTER. The screen below appears:

SET DATE AND TIMESELECT LANGUAGE

(Press ESC to return to the default display when necessary).

Set Date and Time

Select SET DATE AND TIME to display a screen where the clockand calendar settings can be reset by using the UP/DOWNpushbuttons.


The digits below DD-MM-YY represent the pairs of digits forentering the Day, Month and Year for the date. Similarly thosebelow HH:MM:SS represent the pairs of digits for enteringHours, Minutes and Seconds for time. A flashing cursor in theform of a grey rectangle will be seen over the first DAY digit.

1. Increment the first DAY digit by pressing the DOWN

pushbutton until the correct digit is displayed.

Note: If you step past your intended number, keep pressingthe pushbutton to scroll through to zero and repeat the

operation.

2. Advance the cursor to the next digit by pressing the UP

pushbutton.

3. Repeat steps 1 and 2 until the date digits are set

correctly.

4. When the date is set, the cursor moves on to the time

digits. Repeat the procedure for the time and, when

completed, exit by pressing the ENTER key. Pressing

ENTER resets the internal clock to the new time and date

and returns the SETUP screen to the display.

Notes:

1. The procedure can be abandoned at any stage withoutresetting the date and time by pressing ESC.

2. Take care that out of range numbers (e.g. month 13) arenot set inadvertently.

Set Language

The language in which messages are displayed on the LCD screenis selected from this screen (i.e. SETUP).

1. Move the cursor, with the UP / DOWN pushbuttons, to

SELECT LANGUAGE, and press ENTER, to display the

LANGUAGES window:

ENGLISH ESPANOLFRANCAIS DEUTSCHITALIANO

2. Move the cursor, with the UP / DOWN pushbuttons, to

point at the language required, and press ENTER. The

selected language is now set and the SETUP screen

returns to the display.

Note: The procedure can be abandoned at any stage withoutresetting the language by pressing ESC.

2.4.3 UPS Configuration

The UPS is configured for its application by assigning values tovarious parameters from configuration screens which areaccessed from the MAINTENANCE option on the main menuscreen. Only a Liebert approved commissioning engineer shouldset up the configuration. It must not be changed subsequently,except by an authorised engineer. The operator does not need tohave access to these screens, and so access is protected by meansof a password.

Figure 2-2. shows a map of all screens that can accessed by theoperator.

2-4 Issue 3 (01/03/98)


Issue 3 (01/03/98) 2-5


SETDATEANDTIMESELECTLANGUAGE

FRANCAISITALIANO

ENGLISH ESPANOLDEUTSCH

ENTERPASSWORD

SELECTADJUST

SETCANCEL

****

BATTERYINFORMATION

OUTPUTBYPASSBATTERYINTERNAL

OUTPUTFREQUENCYFREQUENCY(Hz)50.0

SYNCHRONISED

OUTPUTCONTROLOUTPUTOFFOUTPUTON

TIMEDOPCONTROL

DELAYEDOPOFFDELAYEDOPON

CANCELDELAY

BATTERYTESTTESTBATTERY

LASTTESTRESULT

OUTPUTCONTROLTIMEDOPCONTROLSHUTDOWNCONDITIONBATTERYTEST

UPSNORMAL NOALARMS14-02-94 14:35:00

FAULT

TESTSPASSEDTURNSW1TOUPSONMAINTENANCEB/P

14:35:0014-02-94

14:35:0014-02-94

TURNSW1TOMAINTONMAINTENANCEB/P

TESTSABORTED NN


OUTPUTVOLTSL-LL1-2400

L3-1400

L2-3400

OUTPUTVOLTSL-NL3240

L2240

L1240

BYPASS

FREQUENCY(HZ)50.0

L1240

L3240

L2240

OUTPUTPOWERKW

0.88 0.88089L1 L3L2

TOTAL 2.65KW

OUTPUTPOWERKVA

0.87 0.870.87L1 L3L2

TOTAL 2.61KVA

OUTPUTCURRENTAMPSL1

1.4L31.4

L21.5

TIME 00:41:24420 100 ON

VOLTS CAP%CHARGER

DCBUSVOLTS

800PRIMARYSECONDARY400

TORETURN

SELECTADJUST

SETCANCEL

DD-MM-YY00-00 -00

HH:MM:SS00 :00 :00

SHUTDOWNCONDITIONONBATTERYATANYTIME

DCBUSTEMPERATURESINFORMATION

ERRORPAGEUPSSTATUSEVENTHISTORY

ERRORPAGE(status)(UPSaction)(message/fault)

UPSSTATUSCONVERTER ONINVERTER ONBATTERYCHARGERON

COMMUNICATION

FAULTATANYTIME

AP4310FATALERROR

CALLFORSERVICE01793553355

#XX

NOMESSAGE

14-02-94 14:35:00

NOREPORT

NORMAL

STARTUPTESTSOK

INITIALISATIONTESTSOK

14:35:0014-02-94

AP4300TURNSW1TOTESTUPSOUTPUTOFF

SWITCHONATMAINISOLATOR

CLOSEBATTERY

FUSES

AP4300INITIALISING

PLEASEWAIT . . .

INV AMB

MAG

CONV BAT 23

24

40

42

38

Figure 2-2 Map of the displays on the LCD screen accessible by the operator

2.5 Switching the Output Off/On

This section describes how to switch the UPS output off in a way

that enables it to be switched on again without repeating the full

start-up sequence.

The facility is provided for use as part of day-to-day operationwhen the UPS output is turned off only for a short period, (i.e. put intoStandby mode); e.g. at the end of the working day, when the UPSis turned off overnight. The battery is kept charged up while theUPS is in Output Off mode.

The UPS output can be switched off by operating SW2 on theback of the UPS, by using the controls on the UPS control panel, or bysending commands from an external system via an optionalcommunications interface.

When the output is selected OFF the microcontroller removespower to the load from the UPS output terminals by switching theinverter off; it also inhibits the static switch, but continues tomonitor the UPS. When the output is set ON, the inverterswitches on, and the UPS output and LED indications then returnto normal.

2.5.1 Output Off Switch SW2

CautionPressing the Output Off pushbutton will

cut off power to the load.

1. To switch output off - Press SW2 and hold it pressed briefly.

The bypass and inverter LEDs switch OFF, while the input LED

stays ON.

If the default screen is not displayed, press Escape on the LCD

control panel several times until it is. The screen will show that the

output is OFF:

AP4300

UPS OUTPUT OFF14-02-95 14:35:00

The DOWN arrow on the fourth line shows that another status

message has also been triggered. Pressing the DOWN button

displays it:

AP4300

LOCALLY STOPPED14-02-95 14:35:00

The message LOCALLY STOPPED shows that the UPS was

switched off with SW2.

WARNINGIF THE DISPLAY DOES NOT INDICATE THAT THE

UPS OUTPUT IS OFF AND LOCALLY STOPPED,THEN REMOVE THE LIFT'OFF COVER, AND

TURN SW1 TO OFF.

2. To return to normal operation, use the operator panel controls (see

below).

2.5.2 Operation from the UPS control panel

Immediate Switching

The operator can switch the UPS output ON or OFF, without usingthe main switch, SW1, by using the controls on the LCD controlpanel instead.

1. Select COMMAND from the main menu display to obtain the

Control screen. The cursor is at OUTPUT CONTROL:

OUTPUT CONTROLTIMED OP CONTROLSHUTDOWN CONDITIONBATTERY TEST

2. Press Enter; the display below appears:

OUTPUT CONTROLOUTPUT OFFOUTPUT ON

To turn the UPS output off:

CautionSelecting the ‘OUTPUT OFF’ will cut off power

to the load.

With the cursor set at OUTPUT OFF, press Enter; the display

asks for confirmation:

OUTPUT CONTROLOUTPUT OFFOUTPUT ONPRESS TO CONFIRM

Press Enter a second time. The inverter LED switches off as

the inverter shuts down, and the load loses power.

Press Escape several times to return to the default window.

The message:

AP4300

UPS OUTPUT OFF14-02-95 14:35:00

will appear. the UPS will stay in this state, with the battery on

charge, until either the UPS output is switched on, or the

input power supply fails.

2-6 Issue 3 (01/03/98)


To turn the UPS output on:



Select COMMANDS from the main menu display to obtain

the Output Control screen. Press the Down button to set the

cursor at OUTPUT ON, and press Enter; the display asks for

confirmation:

OUTPUT CONTROLOUTPUT OFFOUTPUT ONPRESS TO CONFIRM

Press Enter a second time. The inverter LED switches on

briefly, as the inverter starts supplying the load; the bypass

LED switches on, and the inverter LED switches off as a

bypass test is performed; if the default screen is selected (by

pressing Escape several times) it will indicate the UPS status

as:

UPS ON BYPASS

while the test is in progress; finally the inverter LED switches

on and the bypass LED switches off, as the bypass test is

completed and the inverter supplies the load. At the end of the

sequence, which is completed in about ten seconds, the

default window indicates the status as:

UPS OUTPUT ON

Scheduled Switching

This facility permits times when the UPS automatically switchesthe output on, and/or switches it off, to be set.

Select COMMANDS from the main menu display; move thecursor to TIMED OP CONTROL (Timed Output Control) andpress Enter. Three options are presented on the screen:

DELAYED OP ONDELAYED OP OFFCANCEL ALL DELAYS

To set a time when the UPS output will switch ON - (DELAYED

OP ON)

WARNINGSETTING PARAMETERS FOR DELAYED OP ONWILL APPLY MAINS VOLTAGE TO THE LOADEQUIPMENT AT THE DESIGNATED TIME(S).

IF APPROPRIATE A NOTICE STATING WHEN THISWILL HAPPEN SHOULD BE PLACED BESIDE ALL

LOAD EQUIPMENT.

The cursor will be aligned with DELAYED OP ON; press Enter.The screen which allows a date and time to be set is displayed:


Refer to Section - Setting Date, Time & Language on p.2-4 fordetails of how to set these parameters. The character in the areabetween the time and date settings indicates how often the outputswitches on. The switching frequency selected can be one of thefour options shown in the table below. The character thatindicates each option is also shown in the table.

1 Single occasion; i.e. only at the set time on the setdate.

1

2 Daily occasion; i.e. at the set time on the set dateand at the same time every day afterwards, untilcancelled.

D

3 Weekly occasion; i.e. at the set time on the setdate and at the same time on the same day everyweek afterwards, until cancelled.

W

4 Cancel current selection

Notes:1. The default setting is: ; i.e. no times selected for

switching the output on.2. The time & date must always be set in the future.

To select the switching frequency, press the UP pushbutton afterthe time has been set, so that the cursor moves to the position forthe character for the switching frequency; press the DOWN

pushbutton to scroll round the options until the correct character isdisplayed; press the UP pushbutton to move the cursor to the dataarea for the date and set the required date as described inSection 2.4.2 referred to above.

When this screen is first displayed it will show the switchingfrequency and the time and date currently set for it. If thecharacter shown is cancel, then the actual time will be shown,stopped at the moment when the screen was entered.

To set a time when the UPS output will switch OFF -

(DELAYED OP OFF)

CautionSetting parameters for DELAYED OP OFF will

cut off power to the load at the designated time(s).

Move the cursor down so that it is aligned with DELAYED OPOFF; press Enter. The screen which allows a date and time to beset is displayed, as described above; follow the same procedure,but the switching action now will switch the output off instead ofon.

Issue 3 (01/03/98) 2-7


To delete all automatic switching settings - (CANCEL ALL

DELAYS)

Select COMMANDS from the main menu display; move thecursor to TIMED OP CONTROL (Timed Output Control) andpress Enter. Move the cursor down to CANCEL ALL DELAYS andpress Enter. The display asks for confirmation:

DELAYED OP ONDELAYED OP OFFCANCEL ALL DELAYSPRESS TO CONFIRM

Press Enter to confirm (ESC to cancel). The previous screen (theCOMMANDS menu) returns.

2.5.3 Switching with External Commands

General

The UPS output can be switched on or off by means of commandsfrom an external system via an optional SNMP card or an RS232interface connected to the communications board in the UPS. Theseare described in Chapter 4 - Optional Equipment. The user canset how the UPS will respond when it receives an externalshutdown command - see below.

Shutdown Condition

The Shutdown Condition setting determines what the state of the

UPS must be before it will switch the output off when an operator

sends a shutdown command. One of two conditions can be

selected:

1. On Battery - The UPS will switch the output off only if it is

running on battery when the operator sends the shutdown

command.

2. At Any Time - The UPS will switch the output off at any

time, (i.e. it can be running on the input power supply or on

battery power) when the operator sends the shutdown

command.

Procedure

With the COMMANDS menu on the display. Set the cursor atSHUTDOWN CONDITION, and press Enter. The screen shownbelow will appear:

SHUTDOWN CONDITIONON BATTERYAT ANY TIME

Move the cursor to the option required by using the up/downpushbuttons. Select the ON BATTERY option if the UPS output mustonly be switched off when it is running on battery power; selectthe AT ANY TIME option if the UPS output must be switched offwhen the UPS is running on either the input power or batterypower.

After selecting the required option, press Enter. The display asksfor confirmation:

SHUTDOWN CONDITIONON BATTERYAT ANY TIME

PRESS TO CONFIRM

Press Enter to confirm (ESC to cancel). The previous screen (theCOMMANDS menu) returns.

Status display

When the default screen is next displayed after the UPS outputhas been switched off by an external command, the status will beshown on line 3 of the screen; e.g. after a command from anexternal system to switch the output off, the default screen shows:

AP4300

UPS OUTPUT OFF14-02-95 14:35:00

The UPS will stay in this state with the battery on charge untileither it is switched on, or the input power supply fails.

2.6 Input Power Supply Failure

2.6.1 General

When the input power supply fails, the UPS runs On Battery. Youshould consider shutting down your load in a controlled manner –e.g. save data.

The way in which the UPS responds to a input power supplyfailure depends on whether it is on-load or off-load when theinput power supply failure occurs.

2.6.2 Input Supply Failure when On Load

If the UPS loses its input power supply the amber battery-on-load indicator (LED 4) will illuminate; the warning hornwill sound a single half second long tone every 10 seconds andcannot be cancelled. On a common bypass system, LED2 willflash, indicating a loss of the bypass supply, and LED 1 willswitch off.

Note: For units with a separate bypass supply, LED 2 willnot flash while the bypass supply is present, but will be OFF.

The battery time remaining, at the present load, is shown on thesecond line of the LCD panel as follows:

AP4300TIME 03:50:40

UPS ON BATTERY14-02-95 14:35:00

As the battery discharges, the battery time decreases, and thebattery capacity bar LEDs extinguish progressively from theright; each LED represents 20% of capacity. When the batteryautonomy time remaining falls below a user set value (set duringcommissioning), the warning horn will beep every 5 secs.

If the input power supply returns before the battery time expiresthe battery charger switches on automatically, and the UPSreturns to normal operation after a short time delay.

When the battery becomes discharged, the UPS will attempt totransfer the load to bypass. If the bypass is available (split bypasssystem) the transfer will succeed. If no bypass is available(common bypass system) the UPS turns the output off which willalso remove power from the control circuits.

2-8 Issue 3 (01/03/98)


Re-starting from a input power supply failure on load

Common bypass system

Autorestart Enabled (default):- An Automatic Restart facility

ensures that a UPS with a common bypass will automatically

restart if the input power supply returns after the autonomy

time expires, provided the control switches have not been

operated in the meantime. The facility can be disabled during

commissioning if necessary.

CautionCheck the battery capacity after each discharge. If thebattery has been heavily discharged the UPS will shut

down without warning, with loss of power to the load, ifa second power failure occurs whilst the autonomy time

is zero.

A unique feature of the AP4300 permits the operator to

observe the battery condition by referring to the BATTERY

screen.

From the main menu window align the cursor with STATUS and

press the ENTER key. Select BATTERY on the screen that is

displayed and press the ENTER key. The state of the battery will

be shown in the following form:

BATTERY INFORMATIONVOLTS CAP % CHARGER

420 0 ONTIME 00:00:00

This display shows that the battery is unable to support the

load if a failure was to occur: the battery capacity is zero, and

the autonomy time at the current load is zero.

Autorestart Disabled:- The auto-restart facility may have

been disabled on commissioning. When the supply returns

with the auto-restart disabled, the LCD panel will show the

message:

UPS OUTPUT OFF

Restart the UPS by using the controls on the LCD panel to

switch the output on. Refer to Operation from the control

panel - Immediate Switching on p.2-6.

Split bypass system

When the input supply returns, the input rectifier powers up

and the UPS automatically re-starts the inverter, opening the

static switch to transfer the load back to the inverter. The

system is then in the normal operating condition and

recharging the batteries.

2.6.3 Input Supply Failure when Off Load

If the input supply fails after the UPS output has beenswitched off - i.e. an OUTPUT OFF message is displayed on thedefault screen - the amber battery-on-load indicator (LED 4) willilluminate; the warning horn will sound; and LED2 will respond inthe same way as when there is a Failure On Load, described above.

The default screen shows the autonomy time remaining, on thesecond line:

AP4300TIME 03:50:40

UPS ON BATTERY14-02-95 14:35:54

The autonomy time slowly counts down as battery power isconsumed. When a period of fifteen minutes has elapsed after theinput supply first failed, the control system shuts down the UPSto conserve battery power. The LCD screen goes blank and theLEDs extinguish.

Re-starting from a failure off load

When the input supply is restored, the screen below will be seenon the display:

AP4300

UPS OUTPUT OFF14-02-95 15:51:00

It is recommended that the UPS is then started using one of thefollowing methods:

a) Use the controls on the operator panel and follow the

procedure to turn the UPS output on under Operation from

the control panel - Immediate Switching on p.2-6.

b) Switch the UPS output on by means of a command from an

external system sent over a communications link; refer to

section on p.2-8.

Issue 3 (01/03/98) 2-9


The following procedures of Chapter 2 are for competent personnel only

2.7 Applying Power to the UPS

Starts the UPS from the POWER OFF state and sets it in the DE-ENERGISED state ready for a ‘Cold Start’.

WARNINGENSURE THE EQUIPMENT HAS BEEN

COMMISSIONED BY A LIEBERT APPROVEDSERVICE ENGINEER BEFORE PROCEEDING.

1. Initial checks

Remove the UPS front ‘lift-off’ panel – see fig.2-1.

Ensure that the main control switch (SW1) is in the OFF

position.

Ensure that the optional Remote Switch, if connected, is set

at on.

Ensure that the input, and bypass circuit breakers (fig.3-17)

are CLOSED.

WARNINGIF YOU CLOSE THE BATTERY FUSE HOLDERSWHEN SW1 IS AT UPS AND AUTO-RESTART IS

ENABLED, THE UPS WILL FOLLOW THE STARTUP SEQUENCE AUTOMATICALLY; ENERGISE THE

OUTPUT; AND POWER THE LOAD VIA THE UPS.

2. Close the battery fuse holders, FS1 & FS2 (fig.3-17) & FS3

(15/20kVA).

The battery, and on-battery LEDs will switch on. If the UPS

detects an internal fault, the following screen appears:

AP4300INT FAILURE XXXXCALL FOR SERVICE

Otherwise, after about five seconds, the initialising message:


will appear on the LCD screen. It persists for approximately 2secs while the control firmware is initialised.

If all is well, then the start-up screen:

AP4300TURN SW1 TO TESTUPS OUTPUT OFF14-02-95 14:35:00

is displayed and the procedure should continue with step 3

below.

If, instead of the start-up screen, the screen below is

displayed:

SETUP DATA ERRORRELOADING DEFAULTS

PRESS TO CONTINUE

then the system has detected that the parameter settings have

become corrupted during initialisation, and a SETUP error

message has been generated. Press Enter to accept (user has

no option); the screen below is then displayed:

OUTPUT WILL RUN AT230V

PRESS TO CONTINUE

CautionIf the load will be damaged by being supplied with

power at 230V then open the battery fuse holders andcall for a service engineer to reset the parameters.

If an output voltage of 230V is acceptable, press Enter to

accept; the default parameter settings (listed in the table of

parameter settings at the end of this manual) will be reloaded.

While the new data is being loaded and checked, the LEDs on

the load & battery bargraphs repeatedly switch on & off

successively from one end to the other and back again. They

continue cycling in this way, with the sequences in the upper

and lower bargraphs switching in opposite directions, until

the parameters have been re-loaded, when the start-up screen

shown above is displayed. Continue with the procedure at

step 3 below.

3. Power up the UPS by switching the input power supply ON at

the external isolator(s).

The on-battery LED will switch off, and the input LED will

switch on; the start-up screen shown above continues to be

displayed and indicates the position to which the main control

switch should be turned next. This will be ‘TURN SW1 TO

TEST’ if no problems have been detected. After each switch

operation during start up, the position to which the main

control switch should be turned next is updated.

The cold start procedure in the operator section can now befollowed.

2-10 Issue 3 (01/03/98)


2.8 Starting up the UPS on battery ( ‘blackstart’)

2.8.1 General

While it is possible to start the UPS from ‘cold’ without thesupply connected, this is not a normal way to start up.

2.8.2 Procedure

Starts the UPS from the POWER OFF state, sets it in the ON-

BATTERY state and supplies the load with power.

WARNINGENSURE THE EQUIPMENT HAS BEEN

COMMISSIONED BY A LIEBERT APPROVEDENGINEER BEFORE PROCEEDING.

1. Initial checks

Check that input power is not available.

Remove the UPS front ‘lift-off’ panel – see fig.2-1.

Ensure that the main control switch (SW1) is in the OFF

position.

Ensure that the optional Remote Switch, if connected, is set at

on.

2. Turn SW1 to UPS.

3. Close the battery fuse holders, FS1 & FS2 and FS3 (15/20kVA

units).

The battery, and on-battery LEDs will switch on. After about five

seconds, the initialising message:


will appear on the LCD screen. It persists for approximately 2

secs while the control firmware is initialised. Replace the

UPS front ‘lift-off’ panel removed in step 1 above,

– see fig.2-1.

4. Turn the UPS output on.



Select COMMANDS from the main menu display to obtain theOutput Control screen. Press the Down button to set the cursor atOUTPUT ON, and press Enter; press Enter a second time to confirm.Refer to section for full details. The inverter is now supplyingthe load.

2.9 To Put the Load on Maintenance Bypass(MBP)

These instructions describe how to shut down the UPS while the

load continues to be powered via the MBP line.

CautionThe load will not be protected from variations in theinput power supply when supplied via the MBP line.

CautionThe following actions will shut down the UPS.

Note: In the following procedure ignore the second line on theLCD screen; it shows where SW1 should be turned next if the

UPS is being started up.

1. Select the default screen on the LCD Display Panel, and

remove the UPS front ‘lift-off’ panel –see fig.2-1.

2. Select TEST with SW1.

WARNINGIF THE OUTPUT OF THE UPS HAS BEEN TURNED

OFF, TURNING SW1 TO TEST WILL RE-APPLYINPUT POWER TO THE LOAD

EQUIPMENT/DISTRIBUTION SYSTEM. ENSURETHAT IT IS SAFE TO DO SO.

The load is transferred briefly to the static bypass while the

switch is operated and then to the MBP supply line.

The LEDs indicate the current status - i.e. LED(1) ON, LED(2,

3) OFF.

The LCD screen shows the current status of the UPS on its

third line; i.e. load on maintenance bypass:

TESTS PASSEDTURN SW1 TO UPSON MAINTENANCE B/P14-02-95 14:35:00

3. Turn SW1 to MAINT position.

The LEDs indicate that the UPS status is the same as in step 2

above.

The LCD screen also shows that the current status is

unchanged:

AP4300TURN SW1 TO TESTON MAINTENANCE B/P14-02-95 14:35:00

The UPS is now supplying the load via its MBP line.

4. Isolation of the internal components of the UPS.

Open the input and bypass circuit breakers, CB1 to CB6.

Open the battery fuse carriers, FS1 & FS2.

The LCD display and all LEDs will switch off as the power to

the internal components of the UPS decays.

It is safe to remove the battery fuses and for trained electricians tocarry out maintenance on the UPS while it is on MBP. Note thatthe only parts of the UPS that are still live are the terminals and the‘hot box’ behind them.

Issue 3 (01/03/98) 2-11


2.10 Removing Power

Follow the procedure in steps 1-4 above, and then follow the

procedure below to isolate the UPS and LOAD totally from the

power supply.

CautionThe following actions will remove power from the load.

5. Turn SW1 to O/P OFF to remove power from the LOAD

completely.

WARNINGTHE INPUT, BYPASS INPUT, AND UPS OUTPUT

TERMINALS STILL CARRY LETHAL VOLTAGES.DO NOT REMOVE COVERS FROM THESE PARTS.

ONLY COMPETENT PERSONNEL SHOULDREMOVE PANELS FASTENED WITH SCREWS.

6. Isolate the UPS from its external supplies by opening the

input power isolator external to the UPS, and, in a split bypass

system, the external bypass power isolator also.

Refer to Section 2.7 - Applying Power to the UPS, on p.2-10 torestart the UPS from this state.

2-12 Issue 3 (01/03/98)


Chapter 3 - Installation Instructions

These instructions are for use by competent personnel only.

3.1 Safety warnings

WARNINGDo not switch on electrical power to the UPS equipment oroperate any of its switches before it has been commissionedby an authorised engineer. Failure to observe this condition

will invalidate any implied warranty.

WARNING - Battery hazardsSpecial care should be taken when working with the

batteries associated with this equipment.When connected together, the battery terminal

voltage will exceed 380Vdc and is potentially lethal.Eye protection should be worn to prevent injury from

accidental electrical arcs.If a battery leaks electrolyte, or is otherwise physicallydamaged, it should be placed in a container resistant tosulphuric acid and disposed of in accordance with local

regulations.If electrolyte comes into contact with the skin the

affected area should be washed immediately.

WARNINGTHE UPS IS HEAVY AND IS FITTED WITH

CASTORS – TAKE CARE TO PREVENTMOVEMENT WHEN UNBOLTING THE

EQUIPMENT FROM ITS SHIPPING PALLET.ENSURE SUFFICIENT PERSONNEL TRAINED INMOVING HEAVY EQUIPMENT ARE AVAILABLE

WHEN REMOVING THE UPS FROM ITS SHIPPINGPALLET. REFER TO THE INSTRUCTIONS IN

SECTION 3 - REMOVAL FROM SHIPPING PALLET.

WARNINGTake care that the UPS does not tip over when it is beingmoved. The position of its centre of gravity is shown in

Fig.3-1.

WARNINGOPERATION OF THE CONTROL SWITCH (SW1)

FROM THE “UPS” (ON) POSITION THROUGH TOTHE “OFF” POSITION PASSES THROUGH BOTH

THE “TEST” AND “MAINT” POSITIONS. THEINTERNAL MAINTENANCE BYPASS SYSTEM IS

THEREFORE ACTIVATED DURING THISOPERATION.

IF THE UPS HAD PREVIOUSLY BEEN SWITCHEDOFF BY EITHER THE LOCAL OUTPUT OFF SWITCH

(SW2) OR BY A REMOTE STOP PUSHBUTTONSWITCH, TURNING THE CONTROL SWITCH (SW1)FROM THE “UPS” (ON) POSITION TO THE “OFF”

POSITION WILL ACTIVATE THE INTERNALBYPASS SYSTEM AND THEREFORE APPLY POWER

SUPPLIES TO THE LOAD.IN ORDER TO AVOID ACCIDENTALLY APPLYING

POWER SUPPLIES TO THE LOAD VIA THEINTERNAL BYPASS SYSTEM, ISOLATE THE POWER

SUPPLIES TO THE BYPASS SYSTEM BEFORETURNING THE CONTROL SWITCH (SW1)

THROUGH THE “TEST” OR “MAINT” POSITIONS.

3.2 Installation Considerations

3.2.1 Introduction

These installation instructions provide all the information neededfor positioning the UPS (including environmental requirements),for fitting the batteries, and for connecting the input and outputpower cables.

This equipment complies with the requirements of the EMCdirective 89/336/EEC and the published technical standards.Continued compliance requires installation in accordance withthese instructions and the use of manufacturer approvedaccessories. The external communication cabling assemblies mustbe of the shielded type. The shield must be grounded at the UPSend.

3.2.2 On Delivery

The UPS can be supplied either with or without batteriesinstalled. Battery installation instructions are given later in thischapter for use when the UPS is delivered without batteries.

Carry out a thorough external inspection to verify that the UPS iscomplete and free of damage. Report any damage to the shipperimmediately.

Remove and store the packaging.

3.2.3 Environment

The UPS may be installed in a computer room or other largeoffice environment or in a general plant equipment room. It mustbe located in a cool, dry, dust-free environment with sufficientventilation to keep its ambient temperature below 40oC (104oF).(Note: Operating in temperatures above 25oC (77oF) will reducebattery life). Its environment must also be free of excessive moisture(i.e. no water condensation), flammable vapours, chemical fumes orcorrosive gasses or liquids.

The specification, in Appendix A gives details of the UPS heatemission. If necessary, the room should be equipped with aventilation system to assist cooling. A suitable air filtrationsystem should be used for the incoming air where the UPS is tooperate in a dirty environment.

3.2.4 Position

The UPS is force-cooled with the aid of internal cooling fans.Cooling air enters from the back and from around the base of the

Issue 3 (01/03/98) 3-1

AP4300

ESC



AP4300

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Figure 3-1 Position of the centre of gravity of the UPS cabinet

complete with batteries.

UPS, and is exhausted through a ventilation grill located at thetop of the back panel; there must be a minimum gap of 300mmbehind the equipment to allow adequate air flow. See figure 3-2.

Maintenance requires unhindered access to the UPS right handside, and you should allow for a clearance there of approximately1000mm. To aid manoeuvrability on all models and forventilation on the 15/20kVA models, a clearance of 100mm isrequired on the left hand side.

Being mounted on castors, the UPS can be installed without sideaccess provided its input and output power cables are held insuitably flexible conduits. The UPS can then be pulled forward togain access for servicing.

3.2.5 Weight considerations

With batteries fitted, the 7.5kVA and 10kVA models weigh 250kg,and the 15kVA and 20kVA models weigh 432kg. This will make itdifficult to move the equipment over certain floor surfaces (e.g.carpet pile) with the batteries fitted. This should be taken intoaccount when preparing for its installation, and when decidingwhether or not to pull the UPS forward for servicing.

If point loading forces must be considered, note that the weight ofthe UPS acts at six wheels and two jacking feet.

3.2.6 Extended battery option

The UPS uses Valve regulated batteries which are housedinternally. However if the installation includes an Extended Batteryoption, the additional batteries are contained in a separate batterycabinet which is attached to the left hand side of the mainequipment. Batteries are fitted into this cabinet from the front, soit is only necessary to provide the 100mm clearance on the left asstated above for the UPS. Detailed installation instructions for theextended battery cabinet are provided with the fitting instructionssupplied in the kit.

3.3 Removal from Shipping Pallet

The UPS will be delivered on a pallet (Fig.3-3).

It is secured to its pallet by means of three brackets. Two (threeon 15/20kVA units) screws fasten the front of the UPS to a frontbracket (Fig.3-4), and an anchor bolt screws up from beneath thepallet base board into each of two jacking feet brackets (Fig.3-5).There is one jacking foot on each side of, and towards the rear ofthe UPS.

Two wood blocks bolted to the pallet, one in front of, and onebehind the UPS, prevent movement of the UPS on the pallet. The15/20kVA units also have side guide rails fitted.

Removal Procedure

WARNINGENSURE THE PALLET IS PLACED ON LEVEL

GROUND BEFORE REMOVING THE UPS.

1. Remove the right hand front panel (Fig.3-6).

2. Undo the screws holding the front bracket to the UPS cabinet

(Fig.3-4).

WARNINGTHE FOLLOWING ACTIONS WILL PERMIT THEUPS TO MOVE ON THE PALLET, WHICH WILL

TILT SO THAT THE UPS CAN ROLL OFF.THE UPS IS HEAVY (WEIGHT WITH BATTERIES

OF 7.5 & 10KVA MODELS= 250KG, 15 & 20KVAMODELS= 432KG).

YOU ARE ADVISED TO OBTAIN ASSISTANCE TOENSURE IT IS KEPT UNDER CONTROL WHILE

BEING MANOEUVRED OFF THE PALLET.

3. Undo the three wood screws fastening the rear wooden block

to the top of the pallet base (on the 15/20 kVA units remove

the six bolts), and remove the wood block (Fig. 3-7).

4. Undo the two bolts fastening the pallet feet to the pallet base

(Fig. 3-7).

3-2 Issue 3 (01/03/98)

Chapter 3 - Installation Instructions AP4300

AP4300AP4300


dd:mm:yy

300mm

minim

um

gap

1000 mm minimum access

for fixed installation

100mmminimum gap

Figure 3-2 Locating the UPS

Figure 3-3 Rear view of UPS on its pallet

Jacking feet

pallet foot

Side guide rail

Jacking feet

Wood bolster

5. Undo the two anchor bolts clamping the jacking feet to the

pallet (Fig. 3-5). The heads of the anchor bolts are accessed

from below the pallet base board.

The UPS is now free to move on the pallet.

WARNINGTHE FOLLOWING ACTIONS WILL PERMIT THE

UPS TO ROLL OFF THE PALLET UNDER ITS OWNWEIGHT WITH CONSIDERABLE MOMENTUM.TAKE CARE THAT THE UPS DOES NOT STRIKE

ANY PART OF THE BODY AS IT MOVES.WHEN THE FRONT WHEELS, WHICH COME OFFTHE PALLET LAST, ROLL OFF THE END OF THEPALLET, THE OTHER END MAY JUMP UPWARDS

AND COULD CAUSE INJURY. DO NOT STANDBEHIND THIS END OF THE PALLET WHILE THE

UPS ROLLS OFF.

6. Raise the two jacking feet as high as possible by rotating

them anticlockwise.

7. Ensure that the wheels of the

UPS are aligned so that it stays

square to the pallet when it

rolls off, and will not tilt

sideways.

Stop the UPS from moving by

pushing it against the wooden

block in front of the UPS, in

the direction of the arrow in

Fig.3-8. Remove the two rear

feet and the wooden bolster

assembly by knocking them

away from beneath the pallet.

Hold the UPS steady until the

pallet has settled. It will

balance in a level position

because the centre of gravity of the UPS is located close to its

centre line.

WARNINGTHE FOLLOWING ACTIONS WILL PERMIT THEUPS TO ROLL OFF THE PALLET RAPIDLY AND

WITH CONSIDERABLE MOMENTUM IF IT IS NOTRESTRAINED. ENSURE NO EQUIPMENT IS

IMMEDIATELY IN FRONT OF THE UPS, AND THATALL PERSONNEL ARE AWARE OF THE DANGER.

8. Stand at the side of the

pallet and push the UPS

gently backwards. The pallet

will suddenly tilt (Fig. 3-9),

and act as a ramp with a

steep incline (30% approx.).

The UPS will run down on

to the floor. Restrain the

UPS as it rolls down, to

prevent it running off the

pallet too rapidly.

Issue 3 (01/03/98) 3-3

IOM Manual Chapter 3 - Installation Instructions

Figure 3-4 Detail of the front anchor bracket showing the

position of the screws fastening the UPS to it

Bracket screws

Front bracket

Figure 3-5 Detail of the jacking foot showing the position of the

bolt anchoring the UPS to its pallet

Jackingfoot

wood screws

Bolster bolt

Anchorbolt

AP4300


dd:mm:yy

Figure 3-6 Remove the right

hand front panel by pushing

upwards on its bottom edge.

Figure 3-7

Figure 3-8

Figure 3-9

3.4 Batteries

3.4.1 Check

Before you install the UPS check whether or not the unit has beenshipped with batteries already fitted.

If batteries are already fitted, their security must be checkedvisually; if they have not been fitted, they must be installed at thisstage.

WARNINGHAZARDOUS VOLTAGE - BATTERY STRINGS CAN

BE VERY DANGEROUS AND GREAT CARESHOULD BE EXERCISED AT ALL TIMES.

NOTE THE SAFETY WARNING ON BATTERYHAZARDS ON P.1 OF THIS CHAPTER.

BATTERIES MUST BE INSTALLED BY A QUALIFIEDELECTRICIAN.

3.4.2 Introduction

General

Battery blocks are six-cell, valve regulated, lead acid batteriesand are carried on seven trays, positioned one above the other inone or two columns on the left hand side of the cabinet, as shown inFigs 3-11 & 3-12. The top tray in a column carries two battery blocks,and the bottom six trays carry five battery blocks each, so that asingle column is made up of a string of thirty-two battery blocksconnected in series to give a nominal voltage of 384V.

Battery blocks are secured in the trays with three captive boltsclamping a plastic bar over their tops, (Fig. 3-15), except in thetop tray where there is only one bolt.

7.5kVA & 10kVA models

A string of thirty-two battery blocks are installed in a singlecolumn on the left hand side of the cabinet, as shown in Fig.3-11& 3-16.

15kVA & 20kVA models

Two strings of thirty-two battery blocks are installed in two columnson the left hand side of the cabinet, as shown in Figs. 3-12 & 3-19.The battery strings in the two adjacent columns are connected inparallel to give the same nominal battery voltage of 384V.

Fuses

Fuses protect the battery from excessive currents when the UPS isoperating. They are carried in switched fuse holders which areprovided in both the positive, (FS2), and the negative, (FS1), batterylines. In the 15/20kVA models FS3 is added, which isolates thesecond string of batteries when fitted. (see fig.3-18). The fuse holdersare opened when installing the UPS in order to isolate the battery.

Fuse sizing

The ratings for the battery fuses are shown in the specification.When replacing fuses ensure that correctly rated fuses are used.

3.4.3 Units shipped with batteries

(For units shipped without batteries, follow steps 1 to 4 below toremove the front and side panels and battery fuses, and then go to thenext section 3.4.4).

Removal of UPS panels

1. Remove the front detachable panel by pushing up its bottom edge,

(Fig. 3-6).

WARNINGBEFORE PROCEEDING, ENSURE THAT THE

BATTERY FUSES, FS1, FS2 AND, IN 15 & 20 KVAMODELS, FS3, HAVE BEEN REMOVED FROM THE

BATTERY FUSE HOLDERS AND THAT THESEFUSE HOLDERS ARE OPEN. POSITIONS ARE

SHOWN IN FIG.3-17.

2. The battery fuses are

packaged separately in a

polythene bag, located

behind the power

compartment cover plate

(see Fig.3-20). Do not fit

them at this stage but keep

them for fitting later in

these instructions.

3. Remove the left hand front

panel, (Fig. 3-10), by

removing the screw (1)

which clamps the flange on

its lower edge to the

cabinet frame, and pulling

the bottom of the panel

away from the cabinet (2).

The panel is held at the top

by means of a tab along its

top edge which fits in a slot in the overhang of the top cover

on the cabinet. The tab is released by allowing the panel to

drop (3) when it is pulled away from the cabinet.

4. Remove the left hand side panel, by releasing three screws at

the front and three on the back of the cabinet; refer to Figs.3-

11 (7.5kVA & 10kVA models) & 3-12 (15kVA & 20kVA

models).

3-4 Issue 3 (01/03/98)


TEST

MAINT

O/P OFF

UPS

AP4300


1

2

3

Figure 3-10 Removal of Left

hand front panel.

Figure 3-11 Removal of left

hand side panel.

Figure 3-12 15kVA & 20kVA

models.Battery chamber

access.Remove the left hand side

panel by releasing three screws

on the front and three on the

back of the cabinet.

Checks

5. Carry out the following checks:

a) Check that each battery tray is seated securely on its

rails with the six (three each side) tray guide tabs

locating correctly on the cabinet rails and that the

batteries on each tray are positioned as shown in

Figs.3-15 & 3-16.

b) Check that the battery vents are not obstructed by the

clamping bar (Figs.3-15).

c) Check that the interlinking cables are connected as

shown in Figs.3-15 & 3-16.

6. Replace the left hand side panel and then the left hand front

panel by reversing the procedures described in steps 3 & 4

above.

3.4.4 Units shipped without batteries.

Battery Installation

The batteries must be installed before connecting power cables to theUPS.The recommended battery is a Yuasa NP11-12 or equivalent.

Important Note: Check how many 12V battery blocks havebeen delivered. One string of thirty two is required for the

7.5 & 10kVA models; Normally two strings of thirty two arerequired for the 15 & 20kVA models.

1. Follow steps 1 to 4 described above to remove the front and

side panels and battery fuses.

2. Remove the front horizontal strut(s) and two vertical retaining

brackets in front of the column of battery trays (Fig.3-13) by

removing the screws securing them. Note in the 15 & 20kVA

models there is a second set of vertical brackets on the left

hand side and three horizontal struts, which must also be

removed. Remove the battery trays by sliding them forward

from the front of the UPS. The battery cables, clamps and

bolts are stowed in the trays. Carefully store the battery

mounting hardware until required.

3. Five battery blocks are fitted in the six lower trays, and two

blocks are fitted in the top tray in each column (see Fig.3-16).

Batteries are secured with three captive bolts clamping a

plastic bar over their tops, (Fig.3-15), except for the top tray

which uses one bolt. Fit the batteries as follows:

Note:

Before fitting each battery block, use a suitable voltmeter tocheck that the voltage between its terminals is between

12.5V and 13.0V.

a) Push the clamp bolts through the square slots in the base

of each tray, and locate each bolt head in its captive slot.

b) Set the battery tray on the work area as shown in Fig.3-

14, so that two clamp bolts are on the far side of the

battery stop.

c) Fit the battery blocks on each tray with the terminals on

the left hand side of the tray, as shown in Figs. 3-15 &

3-16.

7.5kVA & 10kVA models: Fit thirty-two battery blocks

in seven trays to make up one column of battery blocks.

Fit two battery blocks in the tray that will be fitted on

the top level of the column of battery blocks, and five

battery blocks in each of the six trays that will be fitted

on the other levels (Fig.3-16).

15kVA & 20kVA models: Fit the first string of thirty

two battery blocks into seven trays to make up one

column of battery blocks. Fit two battery blocks in the

tray that will be fitted on the top level of the column of

battery blocks, and five battery blocks in each of the six

trays that will be fitted on the other levels. Repeat this

instruction for the second string.

d) Batteries are secured in the trays with three captive bolts

clamping a plastic bar over their tops, (Fig.3-15), except

in the top tray where only one bolt is used. Place the

clamp bar over the top of the batteries in each tray, and

ensure that each bolt feeds through its corresponding hole

in the bar.

Note: The clamp bar must be positioned so that it runsbetween the middle and the right hand vents on each battery

as shown in Fig.3-15.

Issue 3 (01/03/98) 3-5


Figure 3-13 Release the battery trays by removing the screws

holding the struts and retaining brackets in front of them; the

screws holding the left hand brackets are hidden from view in

the diagram.

Note: There is a second pair of brackets in the 15kVA & 20kVA

models, fastened similarly, in front of the left hand column.

Figure 3-14 Battery tray details and orientation.

Batterystop

Clamp bolt

Rail guide(front)

Rail guides

Rail guides(back)

e) Fit a flat washer, locking washer and a nut to the end of

each bolt (Fig.3-15) and tighten down sufficiently to

hold the batteries so that they cannot move in the tray

(recommended torque loading is 2.5Nm).

Battery cabling

1. Cable up the batteries in each tray as follows:

Important Note:

The battery cables are fitted with ‘Fast-on’ connectors.When connecting the cables to the batteries make sure that

the battery tab fits correctly into the connector and notbetween the connector and its insulation.

a) Connect the interlinking cables, marked no.62, between

each of the batteries on each tray as shown in Fig.3-15.

b) Fit a long interlinking cable, marked no.61, to the positive

terminal of the battery at the rear of each tray use cable

ties as indicated in fig.3-15. Leave the front end of the

cable unconnected.

2. a) Refit the battery trays in the battery compartment and

push them fully back on their rails; ensure that the tray

guide tabs (Fig.3-14) are correctly located on the

cabinet rails. Ensure the tray containing two battery

blocks is fitted onto the top set of cabinet rails.

b) Refit the vertical retaining brackets and front horizontal

strut(s) shown in Fig.3-13.

3. Connect the cables between the battery sets in different trays:

7.5 & 10kVA models: Start with the bottom tray and connect

the free end of the long interlinking cable, marked no.61, on

each tray to the front (i.e. negative) terminal of the battery at

the front of the tray immediately above in the same column. See

Fig.3-16. Continue in this way until the trays on all the levels in

the column have been connected.

15 & 20kVA models: Carry out the above procedure on the

right hand column and then on the left hand column of battery

trays.

Battery string voltage checks - 15 & 20kVA models only

When the battery blocks in each column have been connected upto form two battery strings, the voltage across each battery stringmust be checked before connecting them together.

Measure the total voltage of each battery string with a voltmeterset on a DC range above 450V, as described below.

1. Measure and note the voltage of the battery string in the right

hand column by placing the positive meter lead on the

positive terminal (the rear terminal) of the rear battery on the

top tray in the column, and then placing the negative meter

lead on the negative terminal (the front terminal) of the front

battery on the bottom tray in the same column.

Refer to Fig.3-16 The total battery voltage should be between

+384Vdc and +416Vdc.

3-6 Issue 3 (01/03/98)


+

-+

-+

-+

-+

-

62

62

62

62

61

Figure 3-15 Battery tray with battery blocks and clamp bar in

position and interlinking cables connected (All models)

recommended torqueloading is 2.5Nm

Clamp bar

battery vent

cable tie

interlinkingcables

Connection to next tray up

++

+

+

+

+

+

-

-

-

-

-

-

-

61

61

61

61

61

61

-ve +ve

B

A

Figure 3-16 Single battery string showing inter row connectors

marked No. 61 and string positive and negative connections.

MeterTerminals

-ve Meter Probe

+ve Meter Probe

BATTERY FUSESINPUTBYPASS

BA

TT

-

BA

TT

+

U3

V3

W3

N3

N2

N4

N1

U2

U1

V2

V1

W2

E1

E2

E3

W1

CB2 CB3CB1FS2FS1 CB5 CB6CB4FS3

SW1TESTMAINT

O/P OFF UPS

Figure 3-17 Detail of the 15 & 20kVA UPS showing the

position of FS1, FS2 & FS3.

FS3

FS1

FS2

2. Repeat step 1 above on the battery string in the left hand

column.

3. If these checks are satisfactory, further connections to the

batteries must be made before continuing with the voltage

checks.

Connection of the UPS cables to the battery string(s)

(7.5 & 10kVA models only)

WARNINGENSURE THE BATTERY FUSES FS1 AND FS2 ARE

NOT FITTED AND THE FUSED SWITCHES AREOPEN.

1. Push the connector on the free end of the red cable marked

no.60 (labelled A in Fig.3-16) that enters from the slot in the

top right hand corner of the cabinet on to the positive (rear)

terminal of the rear battery on the top tray.

2. Connect the free end of the black cable marked no.59

(labelled B in Fig.3-16) that enters from the slot in the bottom

right hand corner of the cabinet to the negative (front)

terminal of the front battery on the bottom tray.

3. Refit the left hand side panel by reversing the procedure

described in step 4 of para.3.4.3, (refer to Fig.3-11).

This completes the battery connections. The total battery

voltage must now be checked before continuing with the UPS

installation. Turn to p.8 and follow the procedure given in the

section: Total Battery Voltage Check.

Connection of the UPS cables to the battery string(s)

15 & 20kVA models only:

WARNINGFUSEHOLDERS FS1, FS2 & FS3 MUST BE OPENWITH THE FUSES REMOVED. DO NOT FIT ANY

FUSES IN THEIR HOLDERS OR CLOSE ANY FUSEHOLDERS UNTIL INSTRUCTED.

1. Connect up the cables to the positive terminal of each battery

string as shown in Fig.3-19, i.e.:

a) Push the connector at the end of the red cable marked

no.55 onto the rear positive terminal of the rear battery

on the top tray of the right hand string. Locate cable

marked no 57 which enters the right hand battery

compartment from its top right hand corner and connect

to cable no 55, using the connectors provided.

b) Repeat the above operation on the left hand battery

string, connecting cable marked no 67 to the battery and

its other end to cable marked no 60.

2. Voltage Difference Check:

Note:- FusesAn additional battery fuse, FS3, is provided in the positive

line between the two battery strings in the 15 & 20kVA units.The fuse protects the two battery strings from excessive

currents flowing between them if they are unevenlydischarged. Fig. 3-17 shows the position of the fuse-holdersFS1, FS2 & FS3 . The block diagram in Fig.3-18 shows how

they are connected to the two battery strings.

Check the difference in voltage between the two battery

strings with a voltmeter set on a DC range above 450V, as

follows:

a) Insert the fuse in fuse holder FS3 and close the fuse

holder.

b) Measure the voltage between the front (negative)

terminals of the front battery block in the bottom tray in

the left and the right hand columns. Refer to Fig.3-19.

c) Open fuse holder FS3; remove and retain the fuse; leave

the fuse-holder open.

WARNINGTHE VOLTAGE READING SHOULD BE IDENTICALTO THE DIFFERENCE IN THE READINGS NOTEDEARLIER (BATTERY STRING VOLTAGE CHECKS)AND MUST NOT EXCEED 32V. IF THE VOLTAGE

DIFFERENCE IS GREATER THAN 32V, THEBATTERIES HAVE BEEN CONNECTED

INCORRECTLY. DISCONNECT THE BATTERYCABLES 55 TO 57 AND 60 TO 67, AND CORRECT

THE BATTERY CABLING SO THAT ASATISFACTORY VOLTAGE INDICATION IS

OBTAINED.

Issue 3 (01/03/98) 3-7


FS2

55 57

56

5859

65 64 67 60

FS1

FS3

+-

+-

Figure 3-18 Electrical block diagram of the main components in

the battery circuit of the 15 & 20kVA models

To Negative of d.c. bus

To converter SCR

right handstring

Left handstring

++

+

+

+

+

+

-

-

-

-

-

-

-

++

+

+

+

+

+

-

-

-

-

-

-

-

+ve -ve

67

60

55 57

FS2

FS3

Figure 3-19 15 & 20kVA models only:Measuring the voltage

difference between the two battery strings

+ve meter probe

Meterterminals

-ve meter probe

If the voltage difference checks are satisfactory, proceed to thenext step to complete the connections to the batteries.

3. Final battery cable connections (15 & 20kVA models contd.)

Connect up the cables to the negative terminal of each battery

string as follows:

WARNINGFUSEHOLDERS FS1, FS2 & FS3 (FIG.3-17) MUST BE

OPEN WITH THE FUSES REMOVED.

a. Push the fast-on connector of the black cable marked no

58 onto the front negative terminal of the front battery

on the bottom tray of the right hand string. Locate the

black cable marked no 59 which enters the right hand

battery compartment at its bottom right hand corner and

connect it to cable marked no 58 using the connector

provided.

b. Repeat step a above on the left hand string using cable

marked no 64 to the battery and its other end to cable

marked no 65.

c. Refit the left hand side panel (refer to Fig.3-12) by

reversing the procedure described in step 4 of para.3.4.3.

Total Battery Voltage Check -All UPS models

Check the total battery voltage with a suitable voltmeter asfollows:

1. Remove the terminal block cover plate - see Fig.3-20 in order

to gain access to the battery fuse holder terminals.

2. 15 & 20kVA models only - Insert a 30A fuse in fuse holder

FS3 beside the battery compartment (Fig.3-17) and close it.

3. Set the voltmeter on a DC range above 450V.

WARNINGDO NOT FIT FUSES IN BATTERY FUSE-HOLDERSFS1 OR FS2. ENSURE THESE FUSE HOLDERS ARE

LEFT OPEN.

Measure the voltage between the upper screw terminals of thebattery fuses FS1 (negative meter lead), and FS2 (positive meterlead); refer to Fig.3-21. The total battery voltage must be between400Vdc and 416Vdc.

WARNINGENSURE THAT THE METER INDICATES A

POSITIVE VOLTAGE POLARITY. IF A NEGATIVEVOLTAGE IS INDICATED, DISCONNECT THE

EXTENDED BATTERY CABINET CABLES FROMTHE UPS, AND CORRECT THE EXTENDEDBATTERY CABLING SO THAT A POSITIVE

VOLTAGE INDICATION IS OBTAINED.

4. Replace the terminal block cover removed from the UPS in

step 1 above.

5. Refit the left hand front panel by reversing the procedure

described in step 3 of para.3.4.3, (Fig.3-10).

This completes the Battery Installation procedure. Continue theUPS installation by going to Section 3-5 - Final Positioning.

3-8 Issue 3 (01/03/98)


AP4300


dd:mm:yy

TESTTEST

MAINT

O/P OFF

UPS

Figure 3-20 UPS Power cable entry

Powercompartment

cover plate

FusedSwitches(batteryfuses)

CircuitBreakers

Main TerminalBlock

Gland Plate

Cable Entry Aperture

BA

TT

-B

AT

T+

U3

V3

W3

N3

N2

N1

U2

U1

V2

V1

W2

E1

E2

E3

W1

TESTMAINT

SW1

O/P OFF UPS

INPUTBYPASS

CB2 CB3CB1 CB5 CB6CB4

BATTERYFUSES

FS2FS1

+ve -ve

Figure 3-21 Terminals on the UPS on which the meter probes

must be placed to measure the total battery voltage.

FusedSwitchesFS1 &FS2(Battery

Fuses)

3.5 Final Positioning.

1. Wheel the UPS near to its final position but leave adequate

room around it for work.

2. The brackets (2 off) which secure the UPS to its shipping

pallet also serve as ‘jacking feet’ to prevent the UPS from

moving once it is in position.

Important: The jacking feet support a large proportion ofthe equipment weight when the feet are screwed down

tightly.

3. Move the UPS to its final position and screw down both

jacking feet as far as possible.

Important: If the installation was shipped with batteriesfitted and includes an ‘extended' battery option or ‘remote'

battery option these should be connected at this pointfollowing the appropriate instructions supplied with these

options.

3.6 Connecting the UPS Power Cables

3.6.1 General introduction

Power cables connect to screw terminals on a terminal blockwhich is located behind the power compartment front cover plate– see Fig.3-20. They enter the UPS at the front, from beneath, andpass through a gland plate which covers an aperture in the cabinetfloor. Cables used for all input and output distribution shouldenter the UPS via flexible metal conduit which must beterminated at the gland-plate on the UPS. The gland-plate mustfirst be removed and drilled to suit the glands or bushes for thecables. Ensure that the glands are sized so that they hold thecables securely. If the intention is to run the cables to the UPSabove the floor, instead of from below, then the cable must becarried in a flexible metal conduit, and a suitable 60° or 90°elbow must be used where the cable enters the UPS.

A block diagram of the electrical circuit is shown in Fig.3-29.

3.6.2 Cable sizing consideration

The UPS must be installed in compliance with local regulations.

Before cabling-up, careful consideration must be given toselecting the appropriate size power cables and input circuitprotection device – see table 3-1 below.

Note: The maximum cable size that can be connected to theUPS power terminal blocks is 10mm²

Input / Output cables

The UPS requires a 380V/415V three phase input supply andproduces a 380V/415V three phase output. The input, output andbypass cables are all rated the same.

Bypass cables

The bypass supply can either be connected to the UPS inputsupply (common bypass) or it can be linked to a separate threephase power source (split bypass). Figures 3-25 to 3-28 showthese configurations.

Neutral cables

It is important to size the neutral cable according to the type ofload connected. Some loads can give a neutral current equal totwice the line current.

Important: If the intention is to install the UPS in a positionwhere it will be moved away from nearby furniture etc. in

order to gain access for servicing purposes, its power cablesmust be of sufficient length to permit this. When it is in itsworking position the surplus cable must be stowed safely

beneath the equipment.

3.6.3 Input supply protection.

WARNINGTHIS UPS DOES NOT INCORPORATE AUTOMATIC

BACKFEED PROTECTION. A WARNING LABELMUST BE FITTED TO ALL PRIMARY POWER

ISOLATORS STATING:ISOLATE UNINTERRUPTIBLE POWER SUPPLY

BEFORE WORKING ON THIS CIRCUIT

All supplies to the UPS must be provided with three phase powerisolators, each of which can break all its supply lines to the UPSsimultaneously; a split bypass system will require two isolators.The isolator(s) must be located within two metres of the UPS.

Note: The UPS internal input and bypass circuit breakersare type C (IEC 898). The overload characteristics of theinput isolators supplying these circuit breakers must be

selected accordingly.

Refer to table 3-1 in order to choose site supply fuses, circuitbreakers and power isolators appropriate to the UPS currentratings.

On start-up the UPS will take a half cycle inrush current of 7 to 8times the rated current. This must be taken into account whenselecting the overload protection device at the input mains supplydistribution point. To avoid random tripping on start-up, werecommend that the input mains supply is protected with an MCBcapable of withstanding this initial inrush. (An MCB specified asbeing either ‘TYPE 4’ (British Standard) or rated to ‘CURVE D’(IEC 898) is suitable for this purpose.)

Table 3-1 - Power Cable & Fuse Current Ratings

Model Rating 7.5kVA

10kVA

Max input current @ 380V (-15%) (includingbattery charging*)

16A 20A

Maximum bypass current @ 220V (-15%) 14A 18A

Rating for circuit breaker on supply to inputterminals (& to bypass terminals in splitbypass system):Note: Circuit Breaker type ‘C’ (or slower) isrecommended.

minimum 25Amaximum 32A

Table 3-1a - Power Cable & Fuse Current Ratings

Model Rating 15kVA

20kVA

Max input current @ 380V (-15%) (includingbattery charging*)

32A 40A

Maximum bypass current @ 220V (-15%) 28A 36A

Rating for circuit breaker on supply to inputterminals (& to bypass terminals in split bypasssystem):Note: Circuit Breaker type ‘C’ (or slower) isrecommended.

minimum 50Amaximum 63A

Issue 3 (01/03/98) 3-9


CautionThis equipment is fitted with RFI suppression filters.Earth leakage exceeds 3.5mA but is less than 200mA.

Transient and steady-state earth leakage currents, whichmay occur when starting the equipment, should be taken

into account when selecting instantaneous RCCB orRCCD devices.

Note also that the earth leakage currents of the load willbe carried by this RCCB or RCCD.

WARNINGHIGH LEAKAGE CURRENT - EARTH

CONNECTION IS ESSENTIAL BEFORECONNECTING THE INPUT SUPPLY

THIS EQUIPMENT MUST BE EARTHED INACCORDANCE WITH LOCAL ELECTRICAL CODES.

3.6.4 Output Protection

CautionWhere the load consists of a number of loads, care mustbe exercised that the correct type of rating of protection

is used.Ensure that individual loads are protected and that thecorrect discrimination is maintained between different

load elements.

3.7 Terminal connection points

Fig. 3-22 shows the position of the power cable connectionterminals behind the power compartment cover plate which mustfirst be removed. The input and bypass cables are connecteddirectly to the terminal block. Note that the terminal blocks forthe input phases (U1, V1, W1), and bypass phases (U2, V2, W2),are fitted with bridging links which are removed when the UPS issupplied with a separate bypass supply. Use the proceduresdescribed below for connecting power cables to both the 10 andthe 20 kVA units.

WARNINGTHE BRIDGING LINK FITTED ACROSS THE

NEUTRAL TERMINAL BLOCKS N1, N2 & N3 ON 10KVA UNITS (FIG.3-24) AND ACROSS N1 & N2, AND

N3 & N4 ON 20KVA UNITS (FIG.3-26) MUST NOT BEREMOVED ON A COMMON BYPASS SYSTEM SEE

FIGURE 3-23.

3-10 Issue 3 (01/03/98)


BA

TT

-B

AT

T+

U3

V3

W3

N3

N2

N1

U2

U1

V2

V1

W2

E1

E2

E3

W1

TESTMAINT

SW1

O/P OFF UPS

INPUTBYPASS

CB2 CB3CB1 CB5 CB6CB4

BATTERYFUSES

FS2FS1

Figure 3-22

Detail showing power cable connection terminals, fuse locations

and circuit breakers accessed after removing the front panel.

Key to terminal labels

Input Supply U1, V1, W1, N1

Bypass Supply U2, V2, W2, N2

Output U3, V3, W3, N3

Earth E1, E2, E3

Note: The terminal arrangements for the 20kVA unit include an

extra neutral terminal - N4 (see Fig.3-26).

FusedSwitches(BatteryFuses)

ExtendedBattery

Connectors

BypassCircuit

Breakers

InputCircuit

Breakers

EarthConnectionTerminals

CommonBypassLinks

NeutralBridging

Link

PowerConnection

Terminal Block

Neutral linking

Figure 3-23 shows various input alternatives and the arrangementof the bypass links and specifically the neutral link. The upperrow of drawings show the 7.5/10kVA configurations and thelower row shows the 15/20kVA configurations. The UPS powertrain does not require a neutral input, however, it is essential thatthe bypass has a neutral as this is used not only when the systemis in bypass but as a reference by the UPS power train. Thelinking should be arranged as follows:-

Figure AShows a standard common bypass system with a 4 wire and earthinput supply - all links should be fitted.

Figure BShows a Split bypass system with a 3 wire and earth input supplyto the UPS power train and a 4 wire and earth input supply to thebypass - the U, V & W links should be removed; the neutral linkcan be left in position.

Figure CShows a split bypass system with a 4 wire and earth input supplyto the UPS power train and a 3 wire and earth input supply to thebypass - the U, V & W links should be removed; it is essentialthat the neutral links are left in position

Figure DShows a split bypass system with a 4 wire and earth input supplyto the UPS power train and a 4 wire and earth input supply to thebypass - the U, V & W links should be removed; The neutral linkbetween N1 and N2 should also be removed, on the 7.5/10kVAunit this would involve removing the three terminal link andremoving with cutters the N1/N2 link and then refitting the linkonto N2 and N3 terminals.

Connections to Extended and Remote battery cabinets

The black and the red connectors on the leads from the externalbattery cabinet must be connected to their correspondingconnectors on the leads from the terminals directly below thebattery fuses, labelled - and + in figs.3-24 & 3-26 i.e. black toblack and red to red.

The Extended Battery cabinet contains fuses in both its positiveand negative output lines. They are held in the same type of fuseholders as those used in the UPS FS1 and FS2 positions. Thisprovides protection and enables the Extended Batteries to beisolated independently from the internal batteries for servicingetc.

The terminal for the negative connection from theExtended/Remote battery is connected directly to the UPS internalDC busbar negative rail. The terminal for the positive connectionfrom the Extended/Remote battery is connected through FS2, andis therefore connected to the UPS internal DC busbar positive railvia FS2. FS2 therefore carries both the internal and extended orremote battery currents.

The batteries are connected in this way for safety reasons; whenthe UPS battery fuse holders (FS1/FS2) are opened, the positiveterminals of both the internal and extended/remote batteries aredisconnected from the DC busbar.

Full fitting instructions are provided with the option pack.

The UPS internal batteries are protected by fuses FS1 & FS2. Theoptional Extended battery units by its own fuses FS1 and FS2, aRemote battery must be equipped with equivalent fuses to protectthe external batteries.

Where a Remote Battery option is used, an isolator and overloadprotection device must be located as close to the batteries aspossible.

Issue 3 (01/03/98) 3-11


7,5/10 kVA

N1

N2

N3

U1

U2

V1

V2

W1

W2

N1

N2

N3

U1

U2

V1

V2

W1

W2

A B

N1

N2

N3

U1

U2

V1

V2

W1

W2

N1

N2

N3

U1

U2

V1

V2

W1

W2

C D

15/20 kVA

N1

U1

U2

V1

V2

W1

W2

N2

N4

N3

L6

N1

U1

U2

V1

V2

W1

W2

N2

N4

N3

L6

A B

N1

U1

U2

V1

V2

W1

W2

N2

N4

N3

L6

N1

U1

U2

V1

V2

W1

W2

N2

N4

N3

L6

C D

Figure 3-23 Bridging links for common and split bypass with

three and four wire inputs.

4 wire andearth input

4 wire andearth input

Bypass 4 wireand earth

input


input

UPS 3 wire andearth input



input


input

UPS 4 wireand earth

input

UPS 4 wireand earth

input


input


input



+-

U3

V3

W3

N3

N2

N1

U2

U1

V2

V1

W2

E1

E2

E3

W1

Figure 3-24 Terminals for extended battery connections

To Extended/RemoteBattery Connections

CommonBypass Links

PowerConnectionTerminals

BLACK

RED

3.8 Procedure for connecting the UPS to thepower supply

WARNINGBEFORE PROCEEDING WITH CABLING-UP THE

UPS, ENSURE THAT YOU ARE AWARE OF THELOCATION AND OPERATION OF THE

DISTRIBUTION PANEL ISOLATORS THATCONNECT MAINS POWER TO THE UPS.

VERIFY THAT THESE ISOLATORS ARE OPEN,AND THAT ALL NECESSARY SAFETY MEASURES

TO PREVENT THEIR CLOSURE HAVE BEENTAKEN.

ENSURE THAT THE MAIN ROTARY SWITCH, SW1,IS SET AT OFF.

BEFORE CONNECTING THE SUPPLY CABLES TOTHE UPS, A PERMANENT SIGN MUST BE PLACED

AT THE ISOLATOR FROM WHICH THE CABLESARE RUN, STATING THAT THE ISOLATOR IS

SUPPLYING A UPS. IT IS IMPORTANT THAT THISISOLATOR IS ONLY OPERATED WITH THE

AUTHORITY OF THE UPS USER.

3.8.1 Common input/bypass supply system

This procedure should be followed if the same power source isused for both the UPS input and the bypass supply. Use it for boththe 10 and the 20kVA units.

1. Ensure that the fuse holders FS1 & FS2, and circuit breakers

CB1 to CB6 are open.

2. Remove the power compartment front cover plate –see

Fig.3-20.

3. Connect the input earth to one of the main earth terminals

(E1, E2, E3) shown in figs. 3-25/26. The output earth wires

must also be connected to one of these earth terminals.

4. Connect the output cables to the UPS output terminals U3,

V3, W3, and N3 on 10kVA units (Fig.3-25); an additional

neutral link is provided on 20kVA units (Fig.3-26). Be sure to

observe the correct phase rotation.

5. Connect the input cables from the supply distribution panel to

the UPS input terminals U1, V1, W1, N1 shown in figs.3-

25/26. Be sure to observe the correct phase rotation. Replace

the terminal block cover plate and all panels removed earlier.

3.8.2 Split input/bypass supply

This procedure should be followed if the UPS input and bypassinput are supplied from different three phase supplies. Use it forboth the 10 and the 20 kVA units.

1. Ensure that the fuse holders FS1 & FS2, and circuit breakers

CB1 to CB6 are open.

2. Remove the power compartment front cover plate – see

Fig.3-20.

3. Remove the U1/U2, V1/V2, W1/W2 links as shown in

figs. 3-27 & 28. Leave the bridging links fitted to the earth

terminal blocks (E1, E2 & E3) and the neutral terminal blocks

refer to figure 3-23.

4. Connect the input earth to one of the main earth terminals

(E1, E2, E3) shown in figs. 3-27/28. The output earth wires

must also be connected to an earth terminal.

3-12 Issue 3 (01/03/98)


BA

TT

-

BA

TT

+

U3

V3

W3

N3

N2

N1

U2

U1

V2

V1

W2

E1

E2

E3

W1

U V W N N U V W

Figure 3-25 Power cable connections - 10kVA unit in common

bypass configuration

3 phaseoutput andneutral toload

CommonBypassLinks

Earth Terminals


3 phase inputsupply and neutral

BA

TT

-

BA

TT

+

U3

V3

W3

N3

N2

N4

N1

U2

U1

V2

V1

W2

E1

E2

E3

W1

U V W N N N U V W

Figure 3-26 Power cable connections - 20kVA unit in common


3 phaseoutput andneutral to

load

CommonBypassLinks

Earth Terminals


3 phase inputsupply and neutral

U V W N

U

N

V

W

U

V

W

U3

V3

W3

U2

U1

V2

V1

W2

E1

E2

E3

W1B

AT

T-

BA

TT

+

N3

N2

N1

Figure 3-27 Power cable connections - 10kVA unit in

split bypass configuration

3 phase outputand neutral to

load

Commonbypass links

removed fromU, V, W

terminals

Earth Terminals


3 phaseinputsupply

Neutral Bridging Linkrefer to figure 3-23.

EarthBridging

Link

3phasebypasssupply

&neutral

5. Connect the output cables to the UPS output terminals U3,

V3, W3, and N3 on 10kVA units (Fig.3-27); an additional

neutral link is provided on 20kVA units (Fig.3-28). Be sure to

observe the correct phase rotation.

6. Connect the bypass cables from the supply distribution panel

to the UPS bypass terminals U2, V2, W2 & N2 as shown in

figs.3-27/28. Be sure to observe the correct phase rotation.

7. Connect the input cables from the supply distribution panel to

the UPS input terminals U1, V1, W1 & N1 as shown in figs.

3-27/28. Be sure to observe the correct phase rotation.

Replace the terminal block cover plate and all panels removed

earlier.

3.9 Commissioning

Now that the unit has been correctly installed it must becommissioned by a Liebert approved engineer. He will validatethe installation work and install ‘site information’ into the UPSmicrocontroller memory. This information is required tosubstantiate and validate any subsequent warranty claims thatmight be made. Refer to the Commissioning Manual.

3.10 Electrical Details

3.10.1 Introduction

The main components in the UPS are shown in the block diagramof the circuit in Fig.3-29. The converter, battery charger, inverterand static switch are controlled by the microcontroller.

Key to labels in Fig.3-29

A Input Filter G Output Filter

B 3-phase rectifier (into580V bus)

H Battery Charger

C Resonant Circuit &Switches

J Battery String

D HF Transformer (T1) K 2nd Battery string(15/20kVA units only)

E 1-Phase Rectifier(into 800V bus)

L Static Switch

F 3-phase Inverter M Input links

Issue 3 (01/03/98) 3-13


N

U

V

W

N

U

V

W

BA

TT

-

BA

TT

+

U3

V3

W3

N3

N2

N4

N1

U2

U1

V2

V1

W2

E1

E2

E3

W1

U V W N

Figure 3-28 Power cable connections - 20kVA unit in split


3 phaseoutput andneutral to

load

Commonbypass links

removed fromU, V, W

terminals

Earth Terminals

PowerConnectionTerminals 3 phase

inputsupply

Neutral Bridging Linkrefer to figure 3-23.

EarthBridging

Link

3phasebypasssupply

&neutral

3-1

4Issu

e3

(01

/03

/98

)

Ch

apter

3-

Installation

Instru

ctions

AP

4300

AP4300

ESC

AP4300 INITIALISINGPLEASE WAIT...

S1-E

S1-B

S1-A

S1-C

S1-D

S1-G

U3

V3

W3

U1

V1

W1

N1

B

L

M

U2

V2

W2

FS2FS1FS3

H

J

A C D E F

CB1

CB2

CB3

CB4

CB5

CB6

N3

N2

N4

L6

K

Fig

ure

3-2

9E

lectric

al

blo

ck

dia

gra

m

Bypa

ssS

upplyInputS

upply

Output

Maintenance Bypass

Remove links for SplitBypass system

Remote Stop Option

15/20kVA units only2nd battery string

Output offSwitch SW2

I/P Over voltageCut-out Relay

MICROCONTROLLER BOARD INTERFACE

OPTIONS

InverterOutput Cut-out Relay

Static Bypass

MainControlSwitchSW1

Chapter 4 - Options and Features

4.1 Introduction

A number of options and features are available on the AP4300series UPS; these are listed below.

• Auto-restart Inhibit (feature).

• Common Bypass Links (feature).

• Remote Stop (option).

• Hot Standby Configuration (feature).

• RS232 Interface and External Relay Board (feature).

• RS232 Compatible Software (SiteNet) (option).

• SNMP Interface (option).

• Remote Alarm Monitor (option).

• Extended Battery (option).

• Remote Battery (option).

• Input Filter (option).

• Isolation Transformer (option).

• Bypass Enclosure (option).

• Output Distribution Module (option).

• Frequency Changer (Option).

All options are supplied complete with installation and operatorinstructions.

4.2 Standard Features

4.2.1 Auto-restart Inhibit

The UPS has an Auto-restart facility fitted as standard. If thiscapability is not required, the commissioning engineer will inhibit itby setting a parameter during commissioning.

4.2.2 Common Bypass Links

The input terminals to the rectifier are separate from the staticbypass line terminals, so that different power supplies can be usedfor the two inputs. This arrangement is referred to as ‘splitbypass’. An alternative arrangement, referred to as ‘commonbypass’, where the corresponding phases on these two sets ofinput terminals are connected by means of links, is used whereonly one power supply is available. The UPS is supplied with thecommon bypass links fitted. The connecting links for thecommon bypass must be removed during installation if a splitbypass arrangement is required - refer to the Chapter 3.

4.2.3 Remote stop

A remote stop circuit can be connected to an RJ12 connector onthe inner panel behind the right hand detachable (‘lift-off’) panelon the front of the UPS.

The remote stop kit consists of a 10 metre length cable with aRJ12 connector on one end and a junction box for connection tothe users normally closed switch on the other end. When selectedopen the switch provides a remote output OFF control.

4.2.4 Hot Standby Configuration

The AP4300 can be used in a ‘HOT STANDBY’ to provideincreased security for the load. One UPS is connected in theCommon input/Bypass Configuration, and is used to supply asecond unit which is connected in a split bypass configuration.

Issue 3 (01/03/98) 4-1

L1

L1

L2

L2

L3

L3

E

E

N

N

Figure 4-1 Hot Standby Configuration

Unit 1(Common

Input/BypassConfiguration)

(see 3.8.1)

Unit 2(Split BypassConfiguration)

(see 3.8.2)

LOAD

4.3 Remote Control/ Communications Facilities

4.3.1 RS232 Interface and External Relay Board

Introduction

The COMMUNICATIONS BOARD is fitted as standard andprovides two sets of volt free relay contacts, an interface for a setof “direct action” signals conforming to RS232D voltage levels,and a local RS232D serial port.

The local RS232D serial port permits signals about the state ofthe UPS to be transmitted to a wide range of computers, whichcan then transmit control signals back to the UPS when required.The computers may be located close to the UPS or remotely.Communication with computers over short distances is achievedby connecting them directly to the RS232 interface.Communication with remotely located computers, i.e. overgreater distances, requires the use of a modem and telephone line.

Note: When employing the communications features of theAP4300, SiteNet software and cable kits are available for

use with most operating systems.When using the communications connector, only Liebertsoftware and connecting cables should be used. If using

other than Liebert cable or software, only terminals 2, 3 and7 (send, receive, ground) should be connected. Use of the

other terminals may change the operational state of the UPSor cause a shutdown.

Communications with the UPS is not guaranteed withunauthorised software and cables.

Note: Any connection to a telecommunications network mustbe via an approved modem complying with clause 6 of BS

EN 60950:1994 or BS EN 41003:1997.

The relay contacts on the COMMUNICATIONS board permit thestatus of the UPS and major UPS alarms to be transmitted to otherdevices such as an external alarm panel located remote to the unit,or to the power supply monitoring features of the *IBM AS400computer systems, *Novell, *UNIX or other common operatingsystems.

* Registered Trade Marks

Connectors

The AP4300 communication board is fitted with two 25 wayfemale D type connectors as shown in Figs. 4-2 & 4-4. The topconnector is labelled COMM'S; the lower connector is labelledRELAY.

The DB25 socket labelled RELAY connects only to a set of relaycontacts on the board. The DB25 socket labelled COMM'Sconnects to a second set of relay contacts, to lines carrying the“direct action” signals and also to the RS232D serial interface asshown in figure 4-3.

The outputs from the relay contact closures permit informationabout the state of the UPS to be sent, via a cable, to externalindicating panels etc. The relays are operated by the followingUPS states:

On UPS On battery

On bypass Low battery

The RS232D “direct action” signals are used by the UPS toindicate to an attached system when the UPS state changes; andby the attached system to control the UPS.

The relay contacts and interface signals are assigned to theconnector pins as set out in figure 4-3 and the table below:

Cable Termination

The DB25 connector on the UPS end of the cable must be a rightangle outlet as shown in Fig.4-4. The front cover of the UPScannot be fitted correctly if a ‘straight-out’ connector is used.

4-2 Issue 3 (01/03/98)

Chapter 4 - Options and Features AP4300

PL1

PL3

Figure 4-2 Location of the communications assembly in the

UPS

Remote Stop Connection

PL3 RelayConnector

PL1 Comms.Connector

TxD

N.C.N.O.

N.O.N.C.

RxD

Outputs

Inputs

15

24

181617

1011

9

2

3

21

13

19

12

14

7GND

N.C.N.O.

N.O.N.C.

15

24

181617

1011

9

Figure 4-3 DB25 Connectors Comms (PL1) and Relay (PL3)

Output Communication Lines.

UPS ON

ON BYPASS

ON BATTERY

COMMON

LOW BATTERY

COMMON

Transmit data (from external system)

Receive data (to external system)

0 volt for use with Serial data linesand RS232 compatible lines

LOW BATTERY

POWER FAIL

INVERTER SHUTDOWN HIGH

INVERTER SHUTDOWN LOW

ON/OFF (High/Low)

RS232 levelcontrol signals

25 Way ‘D' TypeConnector PL1

25 Way 'D' TypeConnector PL3

DB25 Pin Definition: The pin out for both DB25 connectors isshown below.

PinNo.

Signal name Direction

COMMSConnector

PL1

RELAYConnector

PL3

1 Not Used Not Used

2 TXD Not Used

3 RXD Not Used

4 Not Used Not Used

5 Not Used Not Used

6 Not Used Not Used

7 Signal Common Not Used

8 Not Used Not Used

9 Low Battery Relaycommon

Low Battery Relaycommon

10 Low Battery Relay NC Low Battery RelayNC

From UPS

11 Low Battery Relay NO Low Battery RelayNO

From UPS

12 Shutdown, Active Low Not Used To UPS

13 Power Fail (ActiveHigh)

Not Used From UPS

14 ON/OFF (High/Low) Not Used To UPS

15 On UPS Relay NO On UPS Relay NO From UPS

16 On Battery Relay NO On Battery Relay NO From UPS

17 Relays Common Relays Common

18 On Battery Relay NC On Battery Relay NC From UPS

19 Shutdown, Active High Not Used To UPS

20 Not Used Not Used

21 Low Battery (ActiveHigh)

Not Used From UPS



24 On Bypass Relay NO On Bypass Relay NO From UPS


Relays

The relays provide volt free contact closures for connection toAS400 minicomputers and/or connection to Novell networks.

Contact ratings:1A at 30Vdc0.5A at 125Vdc0.3A at 110Vac.

Four relays are used, each having a double pole change-overcontact. They are energised by changes in the state of the UPS asshown below; the signals are used by the systems shown inbrackets:

ON UPS (AS400 Interface)ON BYPASS (AS400 Interface)ON BATTERY (AS400 and NOVELL interface)LOW BATTERY (AS400 and NOVELL interface)

The function of the relay contact connections are listed below:

Relay Contact NormalState

Function

On UPS Relay NO Contact is closed when theUPS is operational

On Bypass Relay NO Contact closes when theUPS activates the staticbypass

On Battery Relay NO Contact is closed when theUPS is using power from itsinternal batteries (utility hasfailed)

On Battery Relay NC Contact is opened when theUPS is deriving power fromits internal batteries (utilityhas failed)

Low Battery Relay NO Contact closes when thebattery voltage reaches agiven threshold, andindicates a limited timeperiod before the UPS shutsdown.

Low Battery Relay NC Contact opens when thebattery voltage reaches agiven threshold, andindicates a limited timeperiod before the UPS shutsdown.

Relays Common - A common connection forthe ON UPS, ONBATTERY and ONBYPASS relays.

Low Battery Relaycommon

- A common connection forthe LOW BATTERY relay.This connection is separatefrom the ‘Relays Common’to maintain compatibilitywith the UPStation GXinterface.

“Direct Action” signals(RS232D interface)

The “direct action” signals are used by the UPS to indicate achange of state to a connected system (monitoring signals), andby the system to control the UPS (control signals).

The signal excursions will conform to the RS232D standard; i.e. ahigh is a voltage level between +3 and +15 volts and a low is avoltage level between -3 and -15 volts.

Description of the Monitoring & Control signals

Monitoring signals (i.e. sent by the UPS to an external system)

Power Fail (Active High - pin 13)This output is normally held at an RS232 low level and is set toan RS232 high level if the utility supply fails.

Low Battery (Active High - pin 21)This output is normally held at an RS232 low level and is set toan RS232 high level if the battery voltage drops to a pre-setvoltage level. This indicates a limited time before the UPS shutsdown.

Control signals (i.e. sent to the UPS by an external system):

ON/OFF (High/Low - pin 14)An RS232 high level signal on this pin will turn the UPS on (if it isoff), and an RS232 low level signal will turn the UPS off (if it is on).If the UPS is ON and the interface cable is disconnected the UPSwill remain ON. If the UPS is OFF and the interface cable isdisconnected the UPS will remain OFF.

Issue 3 (01/03/98) 4-3

IOM Manual Chapter 4 - Options and Features

Shutdown (Active High - pin 19)An RS232 high level on this input causes the UPS to shutdown.The utility must have failed and the signal must be present for 2seconds. Disconnecting the interface cable will not cause the UPS toshut down.

Shutdown (Active Low - pin 12)An RS232 low level on this input causes the UPS to shutdown.The utility must have failed and the signal must be present for 2seconds. Disconnecting the Interface cable will not cause the UPS toshut down.

Note: The two shutdown signals are logically OR'd within the UPS;either one of these must be present for 2 seconds before theyshutdown the UPS. The conditions for the shutdown are set by theuser on the UPS control panel and can be selected from:

a) Shutdown the UPS if the utility has failed and the UPS is on

battery.

b) Shutdown the UPS whatever its condition.

Action ‘a’ is the default.

Signal Common

A common reference for all active interface signals.

• Remote communications

The TxD transmit data signal (from external system) to pin 2The RxD receive data signal (to external system) to pin 3The signal common signal - common reference for all interfacesignals to pin 7.

Serial Communications

To provide a straight forward connection to an attached systemthe above signals will be arranged to configure the interface sothat the UPS behaves as a DCE (Data CommunicationsEquipment).

If the attached system employs a 25 way ‘D’ type connector, thenus connections:-

UPS· · · · · · · · · · System

2 · · · · · · · · · · · 2

3 · · · · · · · · · · · 3

7 · · · · · · · · · · · 7

If the attached system employs a 9 way ‘D’ type connector, thenuse connections:-

UPS· · · · · · · · · · System

2 · · · · · · · · · · · 3

3 · · · · · · · · · · · 2

7 · · · · · · · · · · · 5

The serial communication employs propriety protocol.

Cable connection Procedure

• Preparation

CautionThe load will not be protected from an input power

supply failure during the following procedure.

1. Remove the ‘lift off’ perforated cover from the front of

the UPS cabinet.

2. Follow the procedure To Put the Load on Maintenance

Bypass given in the Operator Manual to isolate the

internal components of the UPS, while continuing to

supply the load with power.

3. Ensure that all the circuit breakers (CB1 - CB6) and

battery fuse holders (FS1, FS2) are open.

• Cable connection

4. Insert the 25-way D-type connector at the end of the

cable into the socket marked RELAY or COMM’S (as

appropriate) on the communications option board.

5. Run the cable down to the bottom of the cabinet so that

it will leave the UPS from beneath the front lift off

cover and connect it to the external communication

equipment.

6. Use the Cold Start Procedure given in chapter 2 to start

up the UPS.

7. Replace the ‘lift off’ perforated cover removed earlier

from the front of the UPS cabinet in step 1 above.

4-4 Issue 3 (01/03/98)


Figure 4-4 The communications option assembly

(cables and connectors not included)

RecommendedRight-angleDB25 cableconnectors

4.3.2 SNMP Interface

An SNMP interface is available to allow the UPS to be used withnetwork systems.

The AP4300 Ethernet SNMP option is equipped with two 25 wayfemale D type connectors, one RJ12 connector and one RJ45connector.

The RJ12 connector, labelled SETUP, provides a serial (RS232)interface to the SNMP board and is used to set up the SNMPboard parameters.

The RJ45 connector, labelled NETWORK, provides a twisted pairinterface to the network.

The DB25 connectors are labelled COMM'S and RELAY, theaction of the relays in the RELAY connector duplicates the actionof the relays in the COMM'S connector, the COMM'S connectoralso contains all the relevant interface signals, as described below.

Relay Section

The relay section provides volt free contact closures which arenecessary for connection to AS400 minicomputers and/orconnection to Novell networks.

To fulfil all the necessary requirements four relays are used, eachhaving a double pole change-over contact. These relays willconvey information on:

ON UPS (AS400 Interface)

ON BATTERY (AS400 and NOVELL interface)

LOW BATTERY (AS400 and NOVELL interface)

ON BYPASS (AS400 Interface)

Control/Monitoring signal section

The direct action signals are used by the UPS to signal change ofstate and by the attached system to control the UPS.

The signal functions are:

POWER FAIL (from UPS, active high)

LOW BATTERY (from UPS, active high)

SHUTDOWN(ACTIVE HIGH) (to UPS)

SHUTDOWN(ACTIVE LOW) (to UPS)

ON/OFF (to UPS, high/low)

The signal excursions will conform to the RS232D standard, i.e. ahigh is a voltage level between +3 and +15 volts and a low is avoltage level between -3 and -15 volts.

4.3.3 Interface Software

Both SiteNet® 1 and SiteNet® 2 are available for all majoroperating platforms. Please contact your dealer for furtherinformation.

SiteNet 1® - (Shutdown Management)

SiteNet 1 prevents unexpected server shutdowns by automaticallymonitoring UPS activity and closing down protected devices ifthe input power supply remains off or the battery back-upbecomes low. Connection is via a proprietary cable that runsbetween the UPS and serial port on the server.

When the input supply fails SiteNet 1 notifies the users that theprotected equipment is running on battery power, providing anon-screen count down of the time remaining. If the input powersupply returns the shutdown sequence ends and the users arenotified.

SiteNet 1 can be programmed to dial out on a modem and notifyupon defined events such as input power failure. SiteNet 1 alsooffers real time monitoring of power events so you can monitorand analyse recent and past power history.

SiteNet® 2 -Power Surveillance and shutdown

SiteNet 2 provides ongoing monitoring and control, via a twoway graphical interface, between network servers and the systemsUPS. Under normal conditions. SiteNet 2 provides real-timemonitoring of power flow and critical power data such as voltageand battery temperature. The UPS status can be displayed in threedifferent formats: system animation, power flow and metering.

The Event Manager allows you to customise the monitoringevents and pre-program responses to power problems. SiteNet 2can, for example be programmed to broadcast multiple useralerts, and provide a countdown timer so users can completeback-ups and disconnect from the server before the automaticshutdown occurs. The software can also dial a pager to alertnetwork administrators, shut down the server, and log events.

All this can be accomplished from a single location. Thiscapability includes scheduled on/off control, the initiation ofdiagnostic routines, or down loading power event history foranalysis. These routines can be performed with a user command,or executed automatically according to a pre-set schedule.

SiteNet SNMP Manager

SiteNet SNMP Manager is a snap-in application for your networkmanagement software. SNMP Manager seamlessly incorporatesthe Liebert UPS with your existing network management systemto provide user friendly screens to monitor and control power.

SiteNet SNMP Manager gives you everything you need tooversee network power with ease and precision.

Issue 3 (01/03/98) 4-5


4.3.4 Remote Alarm Monitor

The Remote Alarm Monitor (RAM) offers the following features:

1. Up to eight alarm/status indications

2. Each indicator can be selected to be red, amber or green.

3. Each indication can be accompanied by an audible warning.

4. Each indication can be electronically latched (indication

remains even if the condition changes).

5. Audio alarm silence push button both local and remote.

6. Alarm indication test/reset push button both local and remote.

7. Ability to change alarm legend and company logo labels.

8. Operates from 220V - 240V a.c.

9. Battery back-up option.

The unit normally includes individual alarms for:

UPS ON

UPS ON BATTERY

LOW BATTERY

UPS ON BYPASS

UPS ALARM CONDITION.

Plus 3 Spare ALARM positions

The system is provided in an enclosure for wall mounting andcomes complete with installation instructions.

4-6 Issue 3 (01/03/98)


UPS ON

ACFAIL

LOWBATTERY

ONBYPASS

SPARE

SPARE

SPARE

SPARE

LAMP

TEST/RESET

ALARM

SILENCE

150mm

20

0m

m

75mm

Figure 4-5 Remote Alarm Monitor

Weight 1.2 kg

4.4 Extended Battery Options

The ‘Extended Battery’ option is a separate cabinet containingfurther batteries that can be connected to the UPS to increase itstotal battery capacity and therefore the system autonomy time.

4.4.1 Extended Battery

The battery cabinet for this option is of the same height and depthas the UPS, and is attached to the left hand side of the UPS. Up to4 battery cabinets can be connected to the AP4310 UPS and upto8 battery cabinets to the AP4320 UPS. The extra batteries canincrease the autonomy time by up to approximately 1 hour.

The battery cabinet can contain either one 11Ah set of batteries ortwo 11Ah sets of batteries

Weights (kg)

Empty Battery Cabinet 70

Cabinet with one 11Ah set 200

Cabinet with two 11Ahr sets 330

Dimensions (mm)

Width 386

Height 1100

Depth 663

4.4.2 Remote Battery

This option is similar to the extended battery option, but in thiscase the additional battery capacity is much larger, taking theautonomy time up to approximately 8 hours. Due to the size ofthe additional batteries they are housed in a much larger cabinet(or on a special battery rack) which is located away from theUPS.

Due to the numerous battery configurations available for thisoption it is not possible to cover every installation possibility inthis manual, please consult your dealer for advice. The followingpoints should be taken into consideration when planning yourinstallation.

Battery Isolation And Protection

External batteries must be fused in both positive and negativelines as close to the battery terminals as practical.

Fuses shall have a voltage rating suitable for operation at 440V,the d.c. level of the battery.

A suitable off load isolator must be fitted at the battery end toallow isolation by the service engineer .

Where fuses can be safely withdrawn, they may act as the meansof isolation.

Fused isolators or circuit breakers may also be used.

The cable rating between the battery and UPS shall be sized togive a maximum volt drop of 2V at currents stated in table below,irrespective of the battery autonomy time for the application.

Model 7,5kVA 10kVA 15kVA 20kVA

Max. battery current 19A 25A 37,5 50A

RFI ( EMC ) CONSIDERATIONS

To reduce the risk of radio frequency interference to other parts ofthe installation external batteries and associated wiring should beshielded.

The shielding for the battery can be either a steel cabinet or a rackcladded with steel panels wherever practical. Whichever is used,all panels should be bonded together and to earth for safety. Inaddition to the safety earth a separate earth conductor from thebattery enclosure to the UPS should be fitted to provide thelowest impedance path possible to RFI noise.

Wiring should be shielded by conduit , trunking or the cablingused must be screened.

Where these recommendations are not implemented a minimumradius of 10 metres to any sensitive electronic equipment isrecommended.

Safety Labelling

Warning labels should be fixed to the UPS to warn of an externalbattery, unless by its placement it is obvious to the personnelworking on the UPS where isolation is available.

The external battery enclosure must have a label on the outside towarn the Fire Authorities that lead-acid batteries are containedwithin and also advise the voltage level inside the enclosure.

VENTILATION

Adequate ventilation of battery enclosures must be provided todisperse any build up of gases vented by the battery.

Weight

Ensure that the battery installation weight does not exceedloading capacity of the floor.

Issue 3 (01/03/98) 4-7


4.5 Power Options

4.5.1 Input Harmonic Filter

Introduction

The optional input harmonic filter can be added to the UPS toimprove the UPS power factor and reduce the amount ofelectrical noise reflected back into the input three phase supply.

The filter which is free standing and clipped onto the left handside of the UPS is contained in a cabinet whose styling, colourand size matches that of the 4300 UPS. The cabinet is designedsuch that it can contain either the Input Filter or the IsolationTransformer or both the filter and transformer.

Specification

Input voltage range: 400V + 20% -15% 3ph.3 wire and earth.

Frequency : 50Hz. or 60Hz. ±10%.

Supply Impedance : ≥5% (at UPS rated load).(including cables)

Supply voltagedistortion : <1,5% (at zero load).

Input power factor : ≥0,98 (at rated load)≥0.8 (at zero UPS load).

Input currentharmonics : <10% Thd (at rated load and with

the input supply stated above).

Filter protection : 3 phase circuit breaker in the trap.

4.5.2 Isolation Transformer

Introduction

The Isolation transformer is designed for use on electricalsystems of the ‘IT’ (Impédance à Terre) type.

The Isolation transformer is double wound with a ratio of 1:1.The output winding is star connected to re-establish ground.Connection DY11.

Specification

Input voltage range: 400V ±20% 3ph. 3 wire and earth.

Frequency : 50Hz. or 60Hz. ±10%.

Output regulation : <2% zero to full load under allconditions.

Neutral current : 200% of full line current.

Crest factor : 3 : 1 (Maximum) .

4.5.3 Filter &Transformer

Specification

Inrush current : Will not exceed 10 times thenominal full load peak current for10ms.

Operating Ambient : 0 to +40oC Continuously rated.Temperature

Storage &Transportation : -25oC to +70oC.

Relative Humidity : 95% non - condensing.

Max. operatingaltitude abovesea-level : 1000m. 1% load derating for each

without derating 100m above 1000m up to 3000m.

Ventilation : Natural air cooling -cabinet requires 150mm free spaceat the rear of unit.

Dimensions:

Option Width(mm)

Depth(mm)

Height(mm)

Weight(kg)

Filter 550 650 1100 70

Transformer 550 650 1100 255

Both 550 650 1100 320

4.5.4 External Bypass Enclosure

The Bypass cabinet allows the user to completely remove theUPS from the system, whilst still maintaining power supplies tothe load equipment.

The Change-over switch is a make before break type and can bekey operated. (i.e. A key fitted in the UPS Main Switch S1 cannot be removed until the switch is selected to internalMaintenance bypass. Once removed the key can be inserted intothe change-over switch to allow operation.)

4-8 Issue 3 (01/03/98)


Figure 4-6 Simple line diagram of External Bypass System

External Bypass System Enclosure

Inputisolator

Change-overswitch

UPS disconnect Sockets

Internal Bypass Line

Main Switch S1

StaticSwitch

UPS

Output toLoad

4.5.5 Distribution Cabinet

The Distribution Cabinet permits several loads to be connected bymeans of output sockets on the rear of the cabinet.

The Distribution Cabinet is fitted on the left hand side of the UPScabinet and is available in either a no Break neutral or Breakneutral configuration.

The basic cabinet (A and D Series) contains an input cable, maincircuit breaker, pre-drilled cable landing plate for bottom cableexit, and a 16 pole panel board without output circuit breakers.(the user to fit own circuit breakers and to directly connect theoutput cables as required).

In addition to the above, the C & F series cabinet contains two16A three phase, neutral and ground and six 16A single phase,neutral and ground CEE17 type industrial output sockets. Eachoutput is protected with circuit breakers which are accessedthrough a panel on the left hand side of the cabinet.

Where required cabinets can be supplied with variouscombinations of the above configurations.

4.5.6 Frequency Changer

The AP4300 can be used as a frequency changer. The standard50Hz. unit can be converted to allow 60Hz. input and give 50Hz.output. The 60Hz. unit can be converted to allow 50Hz. input andgive 60 Hz. output.

The following instructions are for converting the AP4300 into afrequency changer.

WarningTHIS WORK MUST ONLY BE CARRIED OUT BY A

LIEBERT AUTHORISED SERVICE ENGINEER.HIGH VOLTAGES ARE PRESENT WITHIN THIS

UNIT, ENSURE THAT THE APPROPRIATEPRECAUTIONS AS DETAILED IN YOUR MANUALHAVE BEEN TAKEN BEFORE ANY COVERS ARE

REMOVED.

• For conversion to 50Hz. INPUT and 60Hz. OUTPUT use

standard 60Hz. Unit.

• For conversion to 60Hz. INPUT and 50Hz. OUTPUT use

standard 50Hz. Unit.

Installation Instructions

1. Gain access to the UPS Microcontoller Board following the

instructions contained in the AP4300 Service Manual.

2. Refer to figure 4-8 and ensure the link between pins 3 and 4

of LK6 is fitted.

3. Ensure that the correct firmware processor is fitted for the

output frequency required.

50 Hz. Output = Part number 02117670.

60 Hz. Output = Part number 02117671.

4. Remove the common bypass links from the main input

terminal block. Remove links as follows:

Link between U1 and U2; V1 and V2; W1 and W2.

Note: Do not remove the Neutral links. When connecting theUPS to the input power supply, ensure connections are

made to the input terminals U1, V1 and W1.

5. Refit the Display Panel.

6. Start the UPS normally as instructed in your IOM manual.

7. Refit the front cover.

The UPS should now be operating as a frequency changer.The

bypass facility is no longer available.

Issue 3 (01/03/98) 4-9


AP4300

AP4300UPSNORMALNOALARMS hh:mm:ssdd:mm:yy

Figure 4-7 Distribution cabinet fitted to an AP4320

CircuitBreakerAccess

AP4320UPS

DistributionCabinet

4-10 Issue 3 (01/03/98)


Figure 4-8 AP4300 Micro controller board

Microcontroller firmware

Chapter 5 - Troubleshooting

5.1 Introduction

WARNINGUNDER FAILURE CONDITIONS, THE UPS WILL

AUTOMATICALLY TRANSFER TO THE INTERNALBYPASS SYSTEM.

POWER SUPPLIES TO THE LOAD WILL BEMAINTAINED EVEN WHEN THE UPS IS

INDICATING “OUTPUT OFF”.THE UPS STATUS ON THE CONTROL & DISPLAY

PANEL REFERS TO THE OUTPUT OF THE STATICINVERTER RATHER THAN THE COMPLETE UPS.

ALWAYS CHECK FOR A VOLTAGE AT THEOUTPUT TERMINALS BEFORE ATTEMPTING TO

SERVICE THE UPS OR THE LOAD.

Problems indicated on the UPS can be divided into two groups:

1. External faults: i.e. abnormalities in the conditions in which

the UPS operates, and which the user can usually resolve: e.g.

input power supply failure, ambient temperature too high.

2. Internal Faults: i.e. defects which develop within the UPS

itself, and which need specialist attention. The highly

integrated design of the AP4300 UPS prevents the user from

curing internal faults.

As soon as any abnormal conditions or faults are detected, theUPS automatically takes action, if necessary, to protect the loadand/or the UPS itself; at the same time it triggers alarm signals onthe operator display panel. The horn sounds and/or LEDs switchto indicate the nature and urgency of the alarm. Text messagesindicate the nature of the fault on the default screen when this isdisplayed on the LCD Display Panel. Charts at the end of thischapter enable the user to interpret these messages, and soidentify which problems can be resolved by the user and whichrequire attention from a UPS specialist.

The UPS microcontroller board contains a battery-backedmemory which keeps a record ( ‘Event History’) of previousalarms. This is for service personnel to use when establishing theoriginal cause of a fault.

WARNINGSOME OF THE INSTRUCTIONS CONTAINED INTHE CHARTS AT THE END OF THIS CHAPTERINVOLVE CHECKING INTERNAL FUSES. THIS

SHOULD BE UNDERTAKEN (AFTER THEEQUIPMENT HAS BEEN SHUT DOWN) BY

COMPETENT PERSONNEL ONLY WHO AREFAMILIAR WITH THE LAY-OUT AND OPERATIONOF THE EQUIPMENT AND FULLY CONVERSANT

WITH THE AREAS OF POTENTIAL HAZARD.

5.2 Alarm indications

5.2.1 Audible Alarm Horn

The horn will make one of five different sounds, according to theurgency of the alarm. The pattern of the audible signals isdescribed in table 5- below. All follow the same basic pattern; i.e.an on period of 0.5secs at intervals of either 1s or 10s, dependingon the urgency of the alarm.

The audible warning can be cancelled immediately by pressingthe horn cancel button (except when the UPS is running OnBattery - see Section 2.6.2 - Input Supply Failure On Load).The LED continues to indicate until the fault clears.

Table 5.1 - Alarm sound identification

AlarmType

Description of Sound Priority

1 Rising Pitch for 0.5s, at 1s intervals “Red Alert”

2 Two tones (high-low) for 0.25s each, at 1sintervals

“Urgent”

3 Single tone for 0.5s, at 1s intervals “Problem”

4 Single tone for 0.5s, at 10s intervals Low

5.2.2 LED Indications

The meanings, and the colour of each of the LEDs on the operatorpanel shown in fig.5-1 are summarised in the table below.

If the UPS input power supply is available (and withinspecification) and the UPS is operating normally, only greenLEDs should be lit, as described in Chapter 1 - GeneralDescription. LED1 (input supply available) and LED3 (load oninverter) indicate correct operation on the module mimic; thenumber of green LEDs lit on the autonomy bar indicates the stateof charge of the battery; and the number of green LEDsilluminated on the percentage load bar depends on the load on themost heavily loaded phase.

After the detection of an alarm condition, LEDs switch on or off,or flash on/off, according to the nature of the fault as shown inthe table below.

Meaning of the Operator Panel Indicator LEDs(refer to fig.5-1)

Key LED Colour NormalState

Indication whenON

1 InputSupply

Green on Input Power supplypresent.

2 StaticSwitch

Amber off Load is on bypass.

3 Inverter Green on Load is on UPS.

4 BatteryStatus

Amber off Battery is discharging,UPS on battery.

5 OverloadIndicator

Amber off Output has exceeded100% of full load.

6 ChargerFault

Amber off Charger is faulty(LED flashes).

7 Alarm Red off A condition requiringurgent attention has

developed (LEDflashes).

8 LowBattery

Indicator

Green on State of charge of battery;this LED will be on whilebattery capacity is above

10%. It flashes whencapacity falls below 10%.

Issue 3 (01/03/98) 5-1

5.2.3 Messages in the LCD Text Window

When the UPS is operating normally the message shown on thedisplay panel in fig.5-1, appears in the Default Screen. The topline gives the UPS model nº; the third line displays the UPSoperational status; and the fourth line normally shows the dateand time.

When an alarm is triggered, status messages and/or an errormessage will be shown on the default screen. If this screen is noton the display when an alarm is indicated, press ESC repeatedlyto show the Default Screen.

Status messages:

Status messages are shown on the third line of the screen, asindicated above. When an operator action, an environmentalchange, or a UPS problem changes the state of the UPS, the newstatus is indicated by a message on this line as shown in theexample below:

AP4310

UPS ON BYPASS14-02-95 14:35:00

If UP or DOWN pushbutton symbols, or both: appearbetween the time and date, as shown above, then there are two ormore status messages. Use the UP/DOWN pushbuttons to scrollthrough these messages. Refer to para 5.3 Troubleshooting

Procedure for help.

The Error Message:

If the UPS takes action in response to a fault developing, then thetop line on the default screen changes to display an errormessage, which shows what action has been taken by the UPS(e.g. emergency shutdown). The second line of the screen tells theoperator to select the error page for more information. The thirdline continues to display status messages; e.g.:-

EMERG SHUTDOWN NNREFER TO ERROR PAGEUPS OUTPUT OFFDD-MM-YY HH:MM:SS

The ‘action’ taken will be one of the following:

General fault Tests aborted

Emergency transfer toinverter

Emergency transfer to bypass

Fatal error Emergency shutdown

The ERROR PAGE, is a screen which permits a service engineerto analyse the internal state of the UPS, and to identify the activealarm. Follow the procedure given in Chapter 6 - Maintenancefor displaying the Information Screen:

ERROR PAGEUPS STATUSEVENT HISTORY

Select the Error Page.

The nature of the information on each of the lower three lines issummarised below:

line 2: UPS Status

line 3: Action taken by the UPS (error message)

line 4: Reason/fault description.

Refer to para 5.3 Troubleshooting Procedure for help with

the action to take according to the reason/fault description on

line 4.

When there are no problems, the error page appears as shown

below:

ERROR PAGENORMALNO REPORTNO MESSAGES

Event History:

The event history screen is accessed from the information screen(see Chapter 6 - Maintenance). It permits details of thecircumstances of previous fault (i.e. conditions which generate anerror message) to be obtained. Up to 100 events can be stored.The format of the information obtained is shown below:

DD-MM-YY HH:MM:SS#XXSTATE NORMALBAT TEMP SENS FAULT

In each case, if UP/DOWN pushbutton symbols: appearbetween the time and date, as shown above, then there are two ormore events recorded. Use the UP/DOWN pushbuttons to scrollthrough them; XX denotes the number of the event, in thechronological sequence of the events, on the display. The UPSstatus is indicated in text on line 3.

The reason/fault for the UPS action (i.e. the error message) ispresented as text on line 4.

5-2 Issue 3 (01/03/98)

Chapter 5 - Troubleshooting AP4300

ESC

AP4300


AP4300


1 2 3 4 58 6 7

Figure 5-1 Position of the LEDs on the operator panel that

indicate alarms or provide status information.

Notes:

1. The Tests aborted error message appears only if an alarm

condition is detected during the start-up test. The instruction

line then shows to which position switch SW1 must be

turned:

TESTS ABORTED NNTURN SW1 TO MAINTON MAINTENANCE B/P

DD-MM-YY HH:MM:SS

2. If a fault occurred during start-up, or communications

between the microcontroller and the UPS have failed during

normal operation the following alarm message appears on the

display:

AP4300INT FAILURE FFNNCALL FOR SERVICE44-1793 553355

The user cannot correct this fault and the UPS supplier must becalled. Whether or not the 'phone no. to call and other details aredisplayed during start-up depends on how far initialisation hadprogressed before the fault was detected. If a communicationsfault triggered the alarm then the LCD display may freeze, sincecommunications may be inoperative, but the UPS will continue tooperate.

5.3 Troubleshooting Procedure

5.3.1 Fault Records

When a UPS fault occurs, first observe and record the UPS Statusparameter values, i.e. the present values of the UPS bypass &output voltage and current and other electrical parameters. Referto Chapter 6 - Maintenance for details of the procedure. Detailsof any loads being started or shed at the time that the faultoccurred should also be recorded.

5.3.2 Alarm Interpretation and Corrective action

The right hand column of the charts on the next five pages showshow the messages that appear on the default screen should beinterpreted, and also provides information on what action to take.

Status messages are listed in alphabetical order in Table 5.2 -

Interpretation of Status Messages; if several status messages areactive and you are unable to identify the reason, then seekimmediate assistance.

Interpretations of Error Messages are given in Tables 5.3 & 5.4-;if you are unsure as to how to undertake the actions detailed, or,as in most cases, you are advised to seek qualified assistance,contact the site engineer, or the UPS supplier for further advice.

WARNINGUNDER NO CIRCUMSTANCES SHOULD YOU

REMOVE THE UPS COVER PANELS OTHER THANTHE FRONT LIFT-OFF COVER. THIS EQUIPMENT

CONTAINS POTENTIALLY LETHAL VOLTAGESEVEN WHEN IT IS DISCONNECTED FROM THE

INPUT SUPPLY.

CautionIf a problem cannot be resolved by taking the actionsgiven, then fully trained assistance should be soughtimmediately. Do not under any circumstances make

internal circuit adjustments or interfere with the circuitboards in any way.

WARNINGIF THE NOMINAL SET INPUT SUPPLY VOLTAGE

EXCEEDS 120% THE UPS WILL SHUT DOWNOPERATION. DO NOT SWITCH TO MAINTENANCE

BYPASS OR YOU MAY CAUSE CONNECTEDEQUIPMENT TO BE DAMAGED.

Issue 3 (01/03/98) 5-3

IOM Manual Chapter 5 - Troubleshooting

5.4 Troubleshooting Charts

WARNINGTHE ACTIONS DESCRIBED SHOULD BE CARRIED OUT BY COMPETENT PERSONNEL. REMEMBER THAT THE

UPS EQUIPMENT CONTAINS POTENTIALLY LETHAL VOLTAGES EVEN WHEN DISCONNECTED FROM ITS INPUTPOWER SUPPLY.

DO NOT UNDERTAKE ANY ACTION NOT DESCRIBED

Table 5.2 - Interpretation of Status Messages

Status Message Interpretation & Actions

AMBIENT TOO HOT Ambient temperature has exceeded its preset limit. This is a warning that the ambient temperature isgetting too high. If it continues to rise the UPS will transfer to bypass, if available, and shut down ifnot.1. Check that UPS room ventilation system is operating correctly.2. Check there is no obstruction of the inlet and outlet grills of the UPS and that there is sufficient

clearance around the unit.3. Seek qualified assistance if no cause can be identified.

BATTERY CHARGE FAULT There is a problem with the battery charger. The batteries may be charging at the wrong voltage, andpossibly not at all. On battery operation after an input supply failure is still possible, but the batterieswill not be recharged when the input supply returns. Autonomy time will therefore not return tonormal.Seek qualified assistance.

BATTERY ON TEST A battery test, initiated at the UPS control panel, is in progress.

BATTERY TOO HOT Battery temp is above recommended maximum for correct operation. Whilst in this state, the batterycharger will not operate.Check battery ventilation system is operating correctly.

BATTERY VOLTS HIGH The battery voltage is greater than the set limit, probably because a faulty battery was fitted when abattery string was replaced.Check the voltages on each tray/battery block and replace any found defective.

BATTERY VOLTS TOO LOW This alarm will usually appear when the UPS is operating on batteries under an input supply failurecondition. It warns that the end of battery autonomy time is near (i.e. is less than 10% of nominal).NB: At the end of the autonomy time the load will transfer to the bypass supply if available; i.e. with a

split bypass system, in which case LED2 will be off.If the bypass supply is not available (e.g. with a common bypass system) LED2 will be flashing.Shut down your load in a controlled manner because power to the load will soon be lost.

CONVERTER HEATSINKTOO HOT

The temperature of the converter heat sink has risen above its warning value. If the temperaturecontinues to rise, the UPS will transfer to bypass, if available and shut down if not.1. Ensure unrestricted airflow around the unit - e.g. no blocked ventilation grills.2. Check fan operation.3. Check for AMBIENT OVERHEAT alarm indication and reduce ambient temperature if necessary.4. Reduce the UPS load if excessive.5. If (1) to (4) are satisfactory seek qualified assistance.

DIAGNOSTIC LINK ON May appear when servicing the UPS. For use only by service engineers.

EMERGENCY TRANSFERTO BYPASS

The inverter has developed a fault and transferred the load to bypass.1. Observe any other alarms (e.g. excessive load or overtemperature) and take necessary actions.2. Seek qualified assistance if no problems are found.

EMERGENCY TRANSFERTO INVERTER

A fault has occurred while the load was on bypass which transferred the load to the inverter.1. Observe any other alarms and take necessary actions.2. Seek qualified assistance.

END OF DISCHARGE Battery voltage has fallen below an acceptable minimum value.The alarm usually appears when the UPS has been operating on batteries under a input power failurecondition and indicates that the battery autonomy time has ended. The load will have transferred to thebypass supply (if available - i.e. a split bypass system). Otherwise, (common bypass system) the UPSwill have shut down and power to the load will have been lost.Alternatively, it may be because of a battery fuse failure or a charger fault.1. Check battery fuses FS1 and FS2 - refer to paragraph 5.5.2. If fuses have failed, or there is a charger fault, seek qualified assistance.

INVERTER HEATSINK TOOHOT

The temperature of the inverter heat sink has risen above its warning value. If the temperaturecontinues to rise, the UPS will transfer to bypass, if available and shut down if not.Carry out the checks given above for converter heatsink too hot (table 5.2).

5-4 Issue 3 (01/03/98)


Table 5.2 - Interpretation of Status Messages - contd.


LOCALLY STOPPED SW2 on the back of the UPS has been pressed and consequently the UPS output has been switchedoff.Switch the output on when required, if it is safe to do so; follow the operating instructions inchapter 2.

OUTPUT OVERLOAD The load is too large for the UPS to supply for an indefinite period. The time for which the UPS cansupport the overload will depend on the magnitude of the overload - the greater the overload, theshorter the time interval. If this time is exceeded, a transfer to bypass will be performed if the bypassis available. If it is not, the unit will shut down.Refer to the Output Overload Ability information given under Output Data in the AP4300 SeriesSpecification at the end of this manual.1. Check for an overload and shed any excess load.2. If load is not indicated as being excessive, or the indications persist, seek qualified assistance.

OUTPUT HIGH FAIL The output voltage has become too high due to an inverter fault, and has exceeded the permitted level.The load will transfer to bypass if the condition persists.Seek assistance if condition persists.

OUTPUT SHORT CIRCUIT A short circuit fault exists on one or more of the output lines.1. Correct the short circuit.2. If no short circuit is found on the output lines, seek qualified assistance.

PHASE ROTATION ERROR The phase sequence of the supply on the power cables connected to the bypass line is incorrect. This faultshould only appear either when first starting up after installation, or after repairs to the bypass power sourcewhen phases have been reconnected incorrectly after a cable break.Disconnect power from the bypass line and correct the wiring.Your local service agent's representative must be present when first starting up your UPS system.

PRIMARY DC BUS LOWWARNING

Either missing or low input power supply and battery discharged.Check the input supply voltage and if this is found to be correct then seek qualified assistance.

REMOTELY STOPPED The remote STOP button (option) has been pressed and consequently the UPS output has beenswitched off:1. Determine if remote stop has really been operated.2. Check continuity of remote stop line.

UPS ON BATTERY Battery is discharging -e.g. because the input power supply is absent and the battery has taken over. Thefive autonomy LEDs switch off progressively from the right as the time remaining before batteryshutdown reduces.1. Check that the input supply is present.2. Check the UPS input circuit breakers (CB4, CB5 & CB6) - refer to paragraph 5.5.3. If (1) and (2) are satisfactory then seek assistance.

UPS ON BYPASS The load has been transferred to the bypass supply due to a fault or status malfunction:Note: The UPS will periodically transfer to bypass to check the integrity of the static bypass circuitry.

It should remain in this state for a maximum of 6 seconds after which a re-transfer to inverter willtake place.

Observe other indications (e.g. excessive load or overtemperature) and take appropriate actions.

UPS OUTPUT OFF The UPS is active but its output has been switched OFF using one of the methods described inchapter 2.1. Check if the UPS output has been turned OFF - e.g. from a remote location. If it has, find out the

reason and then turn it on when it is safe to do so. Refer to the operating instructions in chapter 2.If the output does not switch on, turn SW1 back to MAINT and restart the UPS. Refer to theoperating instructions in chapter 2.

2. If the above actions do not overcome the problem, seek qualified assistance.

UPS OVERTEMPERATURE Temperature of one or more of the UPS internal sensors has reached its fail level. The UPS will transferto bypass immediately, if the bypass supply is available.1. Check if there are any other status messages indicating excessive temperature by scrolling through

them on the default screen.2. Carry out the checks given above for converter heatsink too hot (table 5.2).

Issue 3 (01/03/98) 5-5


Table 5.3 - Interpretation of Error Messages


BYPASS SCR SHORT CCT Internal power component problem.1. Transfer the load to the maintenance bypass following the appropriate operating instructions.2. Seek qualified assistance immediately.

BYPASS SCR OPEN CCT Internal power component problem.1. Leave the UPS running. Do not operate SW1 or SW2 under any circumstances as this will power

down the load.2. Seek qualified assistance immediately.

INPUT LOW FAIL The input supply is low and the battery is not supporting the primary DC Bus, so the voltage on theprimary DC Bus has fallen below its fail level.1. Check the state of the input, the input circuit breakers and battery fuses refer to paragraph 5.5.2. If these are OK then seek qualified assistance. Also see status message [UPS ON BATTERY] in

table 5.2 for other possible messages.

INPUT HIGH FAIL The input supply voltage on one or more of the INPUT terminals is too high (i.e. greater than 120%).1. Problem could be due to genuine high input supply voltage, or surge(most likely if it corrects

itself). Check if voltage is above 120% of nominal on the input supply.2. If this alarm occurs during initial start-up check that the voltage is correctly set for the local

working voltage. (see installation instructions).3. If neither of the above then seek qualified assistance. Note warning on page 5-4.

BYPASS LO FAIL While on bypass for whatever reason, the UPS has detected that the bypass volts on one or more ofthe phases has fallen below its fail level. The UPS will have performed an emergency transfer toinverter, if available, or shut down if not.1. Could be due to genuine low voltage on the bypass supply2. Check if the bypass circuit breakers: CB1, CB2 & CB3 have tripped open, - refer to

paragraph 5.5.3. If neither of the above then seek qualified assistance.

BYPASS HI FAIL While on bypass for whatever reason, the UPS has detected that the bypass volts on one or more ofthe phases has risen above its fail level. The UPS will have performed an emergency transfer toinverter, if available, or shut down if not.Could be due to genuine high bypass. Check if voltage is above 120% of nominal on the bypasssupply. If it is not, seek assistance..

PHASE ROT. ERROR Refer to this message in table 5.2.

OUTPUT HI FAIL Refer to this message in table 5.2.

OUTPUT LO FAIL Output voltage has fallen below the allowed minimum on one or more phases.Either an internal voltage regulation problem exists or there has been a sudden increase in load.Load will transfer to bypass if condition persists.Seek assistance if the load is not excessive and cannot be transferred back to the inverter.

OUTPUT SHORT CIRCUIT Refer to the message OUTPUT SHORT CIRCUIT in table 5.2.

O'LOAD TIMEOUT Load current on one or more output phases has exceeded the permitted level for too long. The UPShas transferred the load to the bypass.1. Shed excess load2.If load is not indicated as being excessive seek qualified assistance.

WAITING FOR BYPASS Automatic tests (SW1 in TEST position) cannot proceed due to one or more of the bypass phasesbeing absent.1. Check bypass supply voltage and circuit breakers.2. Seek assistance if all three phases are present.

END OF DISCHARGE Battery has reached end of discharge, following a input supply failure. UPS will have shutdown, (in acommon bypass system), or transferred to bypass (split bypass system).

SW1 IN WRONG POS. An attempt has been made to start the UPS with the rotary switch SW1 set at UPS without autorestartenabled.

DC OFFSET TIMEOUT The UPS has detected DC on the output of one or more phases. The UPS will have transferred theload to the bypass.Seek qualified assistance.

BP SCR OPEN CCT (2) Refer to BYPASS SCR OPEN CCT above.

* * * * HI TEMP FAIL Refer to UPS OVERTEMPERATURE in table 5.2.

EOD (IP Ø MISSING) One of the input phases is not supplying power, probably because a fuse has failed in the supply.Check that all input supply fuses are OK, all input circuit breakers are closed and connections to allinput terminals are tight.

5-6 Issue 3 (01/03/98)


Table 5.4 - Interpretation of Error Messages

Error Message Interpretation & Actions

AMB TEMP SENS FAULT

SELECT SWITCH 1 TO THE MAINTENANCE BYPASS POSITION AND SEEKQUALIFIED ASSISTANCE FOR ALL THESE ERROR MESSAGES

BATTERY CHRG. FAULT

BATTERY NOT CHARGING

BAT TEMP SENS FAULT

COMMS FAILURE (CAN)

COMMS FAILURE (422)

CONTROL PWR OFF FAIL

CONV. FEEDBACK ERROR

CONVERTER NOT OK

CONV TEMP SENS FAULT

DC2 MIDPOINT HI FAIL

EMERG BYPASS FIRING

INTERFACE RESET

INV TEMP SENS FAULT

MAG TEMP SENS FAULT

NO OUTPUT VOLTS

NVRAM RELOADED

OUTPUT SHORT CCT.

SEC. DC BUS HIGH FAIL

SEC. DC BUS LOW FAIL

SETUP DATA ERROR

SETUP DATA RELOADED

TOO MANY CONV. RST.

VCE SAT FAIL

Issue 3 (01/03/98) 5-7


5.5 Checking the input and bypass circuitbreakers, and battery fuses

A number of alarms may be triggered by a circuit breaker opening ora fuse failure; e.g: Battery volts too low, UPS on battery & BypassIP volts low.

Circuit breakers and fuses are accessible after removing the ‘lift-off’right hand front panel. The positions of the fused switches (FS1-FS2)which carry the battery fuses and the circuit breakers for the bypasssupply (CB1-CB3) and the input power supply (CB4-CB6), areshown in fig.5-2.

WARNINGONLY PERSONNEL WHO ARE TRAINED AND

DEEMED COMPETENTSHOULD CHECK FUSES OR OPERATE CIRCUIT

BREAKERS.TRANSFER THE LOAD TO THE MAINTENANCE

BYPASS SUPPLY BEFORE CARRYING OUT A FUSECONTINUITY CHECK.

5.5.1 Battery fuse check

Open the fuse holders of the fuses in question and extract thefuses from the holder. Check the continuity of the fuses with asuitable meter, and replace any fuses found to be defective.

CautionEnsure any defective fuses are replaced by fuses of thesame TYPE and RATING (i.e. 30A) as the fuse being

removed.Never increase the fuse rating.

5.5.2 Circuit breaker check

The switch levers of any circuit breakers which have tripped opendue to an excessive current passing through them will be in thedown position.

Before closing any tripped circuit breakers, ensure that it is safeto do so.

5-8 Issue 3 (01/03/98)


TEST

MAINT

O/P OFFO/P OFF

UPS

AP4300


TESTMAINT

SW1

OFF(0)

OFF(0)

UPS

INPUTBYPASSBATTERYFUSES

CB2 CB3CB1 CB5 CB6CB4FS2FS1

Figure 5-2 Input and bypass circuit breaker and battery fuse

holder locations

Chapter 6 - Maintenance

6.1 Routine Maintenance Checks by theOperator

6.1.1 Introduction

The UPS uses solid state components with the only moving partsbeing the cooling fans, switches and relays, so it is essentially‘maintenance free’. However the checks in this chapter will help tomaintain the reliability of the UPS module and battery. Werecommend an annual service of the unit by an engineer approvedby the manufacturer, preferably under a service contract.

Scheduled maintenance requirements, beyond ensuring that theUPS remains cool and clean, are minimal. However, a welldocumented program of regular inspection will help to ensureoptimum performance and also help to detect certain minorproblems before they develop into a major fault.

6.1.2 Checks at weekly intervals

1. Ensure that the ventilation space around the base and the back

of the UPS is not obstructed.

2. Check the function of all the LEDs and pushbuttons on the

panel by carrying out a Front Panel Test. Press each pushbutton

in turn for two seconds. All the LEDs should switch on and the

audible alarm should sound with each pushbutton. Cancel the

alarm and record the result.

If the default screen is on the display when a test is made, the

top line of the screen will indicate the UPS type in the

following format:

AP43XX NN.N ii/oo ±b

UPS NORMAL NO ALARMS25-09-95 10:15:00

XX = chassis type (XX=10 or 20)

NN.N = UPS output rating.

ii = input frequency

oo = output frequency

±b = battery presence (i.e. +b=battery fitted; - b=battery

not fitted, e.g. when the UPS is used as a line

conditioner).

6.1.3 Checks at monthly intervals

In addition to the weekly checks, use the procedure following tocheck and record the present values of the UPS status parametersas listed:

1. Output voltage and frequency on each phase.

2. Output current & output load (kW & kVA) on each phase.

Note: If the output currents differ significantly from the values

previously logged then, if possible, record the size, type and

location of any load connected to (or removed from) the UPS

since the previous inspection.

3. Bypass supply voltage on each phase, and the frequency.

4. Battery float charge voltage and capacity.

5. Voltage on the primary and secondary DC bus.

Ambient and battery temperatures, temperatures on the

inverter & converter heatsinks (& on the converter magnetics

in 20kVA units).

State of the converter, charger & inverter.

UPS status parameters

The values of the status parameters are displayed on the LCDpanel by selecting options from the windows reached via the mainmenu & status windows, (see the menu map in fig.6-1). If any of thevalues differ greatly from those previously logged, for no apparentreason, seek advice from your Distributor or Service Agent.

From the default window, press ENTER to display the main menuwindow:


The cursor will be aligned with STATUS. Press ENTER to select thestatus window. The menu of UPS status categories is displayed:


Output parameters

Select OUTPUT by pressing ENTER to display the first of a setof six screens which can be displayed in rotation by pressingENTER successively. Press ESC to return to the STATUS screen.These screens display, in sequence:

OUTPUT VOLTS (L-N)OUTPUT VOLTS (L-L)OUTPUT LOAD (kVA) on each of the phases L1, L2, L3OUTPUT LOAD (kW) }OUTPUT CURRENTINVERTER OUTPUT FREQUENCY.

The inverter output frequency screen also carries a messagestating whether the UPS output and bypass supplies aresynchronised.

Bypass

Return to the status window and select BYPASS to display thebypass supply voltage and frequency levels:

BYPASSL1 L2 L3240 240 240FREQUENCY (HZ) 50.1

Issue 3 (01/03/98) 6-1

6-2 Issue 3 (01/03/98)

Chapter 6 - Maintenance AP4300

SETDATEANDTIMESELECTLANGUAGE

FRANCAISITALIANO

ENGLISH ESPANOLDEUTSCH

ENTERPASSWORD

SELECTADJUST

SETCANCEL

****

BATTERYINFORMATION


OUTPUTFREQUENCYFREQUENCY(Hz)50.0

SYNCHRONISED

OUTPUTCONTROLOUTPUTOFFOUTPUTON

TIMEDOPCONTROL

DELAYEDOPOFFDELAYEDOPON

CANCELOR DELAY

BATTERYTESTTESTBATTERY

LASTTESTRESULT

OUTPUTCONTROLTIMEDOPCONTROLSHUTDOWNCONDITIONBATTERYTEST

UPSNORMAL NOALARMS14-02-94 14:35:00

FAULT

TESTSPASSEDTURNSW1TOUPSONMAINTENANCEB/P

14:35:0014-02-94

14:35:0014-02-94

TURNSW1TOMAINTONMAINTENANCEB/P

TESTSABORTED NN


OUTPUTVOLTSL-LL1-2400

L3-1400

L2-3400

OUTPUTVOLTSL-NL3240

L2240

L1240

BYPASS

FREQUENCY(HZ)50.0

L1240

L3240

L2240

OUTPUTPOWERKW

0.88 0.88089L1 L3L2

TOTAL 2.65KW

OUTPUTPOWERKVA

0.87 0.870.87L1 L3L2

TOTAL 2.61KVA

OUTPUTCURRENTAMPSL1

1.4L31.4

L21.5

TIME 00:41:24420 100 ON

VOLTS CAP%CHARGER

INV AMBMAG

CONV BAT

423840

2423

DCBUSVOLTS

800PRIMARYSECONDARY400

TORETURN

SELECTADJUST

SETCANCEL

DD-MM-YY00- 00 -00

HH:MM:SS00 :00 :00

SHUTDOWNCONDITIONONBATTERYATANYTIME

DCBUSTEMPERATURESINFORMATION

ERRORPAGEUPSSTATUSEVENTHISTORY

ERRORPAGE(status)(UPSaction)(message/fault)

UPSSTATUSCONVERTER ONINVERTER ONBATTERYCHARGERON

COMMUNICATION

FAULTATANYTIME

AP4310FATALERROR

CALLFORSERVICE01793553355

#XX

NOMESSAGE

14-02-94 14:35:00

NOREPORT

NORMAL

STARTUPTESTSOK

INITIALISATIONTESTSOK

14:35:0014-02-94

AP4300TURNSW1TOTESTUPSOUTPUTOFF

SWITCHONATMAINISOLATOR

CLOSEBATTERY

FUSES

AP4300INITIALISING

PLEASEWAIT . . .

Figure 6-1 Map of the displays on the LCD screen accessible by the operator

Battery parameters

Selecting BATTERY from the status window displays the batteryvoltage, capacity, and autonomy time at the current load, and thecharger status:

BATTERY INFORMATIONVOLTS CAP % CHARGER420 100 ON

TIME 00:41:24

Internal parameters

Select INTERNAL from the status window to display furtheroptions:

DC BUSTEMPERATURESINFORMATION

Select DC BUS to show the voltage levels on the two DC buses:

DC BUS VOLTSPRIMARY SECONDARY

400 800TO RETURN

Select TEMPERATURES to display the battery (BAT) andambient (AMB) temperatures, and the temperatures on theconverter (CONV) and inverter (INV) heatsinks, and, on 20kVAunits only, the converter magnetics (MAG):

CONV 40 BAT 23INV 38 AMB 24MAG 42

Select INFORMATION to gain access to windows from whichinformation on the past and present state of the UPS can beobtained:

ERROR PAGEUPS STATUSEVENT HISTORY

Select UPS STATUS to show the state of the three major blocksof the UPS:

UPS STATUSCONVERTER ONINVERTER ONBATTERY CHARGER ON

The ERROR PAGE & EVENT HISTORY windows are usedwhen an alarm has been triggered, and enable the cause of thealarm, and the events leading up to it, to be analysed. Refer toSection 5.2.3 in Chapter 5 - Troubleshooting.

6.1.4 Annual checks

1. Carry out the monthly checks given above.

2. Carry out a battery test as follows:

From the default window, press ENTER to display the main

menu window. Select COMMANDS. and press ENTER:

OUTPUT CONTROLTIMED OP CONTROLSHUTDOWN CONDITIONBATTERY TEST

Select BATTERY TEST and press ENTER:

BATTERY TESTTEST BATTERY

LAST TEST RESULT

The cursor points at TEST BATTERY. Press ENTER to start the

battery test. If the battery is satisfactory, the word: PASS

appears on the screen.

Issue 3 (01/03/98) 6-3

IOM Manual Chapter 6 - Maintenance

6.2 Annual Maintenance Checks by ServiceEngineer

6.2.1 Introduction

These checks entail working inside the UPS, and should beundertaken only by a Liebert trained engineer who is familiarwith the UPS operation and lay-out, and who is aware of thepotential hazards.

SAFETY PRECAUTIONSWhen working on the UPS remember that it will containlive voltages at ALL TIMES unless it has been isolatedfrom the external input power supply, and the internal

batteries (and external batteries, if fitted) have beendisconnected. It is essential that the safety and

precautionary notes contained throughout this manualare read and fully understood before touching any UPS

internal component part.

The service engineer would complete the following checks:

UPS

Carry out a thorough visual examination of the UPS power

components and sub-assemblies, paying particular attention to

the following:

Electrolytic capacitors -

Check for signs of leakage, buckling etc.

Magnetic components -

Check for signs of overheating, security of fixture and

signs of cracking in ferrite components.

Cables and connections -

Check all cables for chafing, fraying or signs of

overheating. Also check that all cable connections are

tight and all printed circuit board connectors are secure.

Printed circuit boards -

Check the cleanliness and integrity of the circuit boards

and replace if any signs of deterioration are found.

CautionA lithium battery powered chip (part no.02101065) is

carried on the interface board. If this board is replaced,either dispose of the chip in accordance with the

manufacturer's instructions, or else contact your localdistributor for disposal instructions.

DO NOT DISPOSE OF THE CHIP THROUGH THEDOMESTIC REFUSE SERVICE.

Batteries

WARNING - BATTERY HAZARDSSPECIAL CARE SHOULD BE TAKEN WHEN

WORKING WITH THE BATTERIES ASSOCIATEDWITH THIS EQUIPMENT.

WHEN CONNECTED TOGETHER, THE BATTERYTERMINAL VOLTAGE WILL EXCEED 380VDC AND

IS POTENTIALLY LETHAL.IT MAY BE NECESSARY TO DISCONNECT THEINTER-TRAY LINKS IN ORDER TO GAIN FULL

ACCESS TO THE BATTERY TRAYS. DO THIS WITHEXTREME CAUTION.

EYE PROTECTION SHOULD BE WORN TOPREVENT INJURY FROM ACCIDENTAL

ELECTRICAL ARCS.IF A BATTERY LEAKS ELECTROLYTE, OR IS

OTHERWISE PHYSICALLY DAMAGED, ITSHOULD BE PLACED IN A CONTAINER

RESISTANT TO SULPHURIC ACID AND DISPOSEDOF IN ACCORDANCE WITH LOCAL

REGULATIONS.IF ELECTROLYTE COMES INTO CONTACT WITH

THE SKIN, THE AFFECTED AREA SHOULD BEWASHED IMMEDIATELY.

Check the batteries carefully, paying particular attention to thefollowing:

General condition -

Examine the battery cases for signs of deformation,

cracks or general physical deterioration.

Battery block voltage -

Check the voltage of each battery block with a meter.

This should be greater than 12.6 volts d.c.

Cables and connections -

Examine the cables for signs of deterioration and ensure

that all connections are securely fastened.

General

If necessary, thoroughly clean inside the UPS using a vacuum

cleaner.

Re-assemble the UPS, and start it up following the procedures

in Chapter 2 - Operating Instructions.

If possible, check the battery autonomy time by turning the

UPS input supply OFF while the UPS is on-load. Ensure that

the UPS operates on battery correctly and check that the

available battery autonomy time meets the specification.

Refer to the procedure in Chapter 2 - Operating Instructions.

Turn the UPS input supply ON again as soon as these checks

have been made.

6-4 Issue 3 (01/03/98)

Chapter 6 - Maintenance AP4300

Chapter 7 - Liebert Warranty

LIMITED WARRANTY

Liebert Corporation extends the following LIMITED WARRANTY to the purchaser and to its customer (collectively referred to as the“purchaser”): the enclosed Uninterruptible Power System (UPS) and components are free from defects in materials and workmanshipunder normal use, service and maintenance FOR A PERIOD OF ONE (1) YEAR FROM THE DATE OF ORIGINAL PURCHASEfrom Liebert or the Liebert Dealer/Retailer. THE FOREGOING WARRANTY IS THE ONLY WARRANTY GIVEN AND NOOTHER WARRANTY IS PROVIDED, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, MERCHANTABILITYOR FITNESS FOR A PARTICULAR PURPOSE. Certain aspects of disclaimers are not applicable to consumer products acquired byindividuals and used for personal, family, or household purposes (as distinguished from industrial or other purposes). Local laws maynot allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. This warranty gives youspecific legal rights, and you may have other rights which vary according to local law.

Certain repairs or services are the responsibility of the purchaser and the purchaser is expected to pay for them. This warranty doesnot extend either to products with removed or altered serial numbers or to any losses or damages due to an act of god or sourceexternal to the product, misuse, accident, abuse, neglect, negligence, unauthorised modification, alteration, or repair, use beyond ratedcapacity, or improper installation, maintenance, application or use, including without limitation, use in a manner contrary to theaccompanying instructions or applicable codes. The battery must be recharged every four (4) to six (6) months when not in use.

The warranty will be invalidated unless the UPS has been commissioned by Liebert CS&S or an engineer who has been trained onthe product in an approved Liebert Training Centre.

Warranty does not apply to consumable parts such as lamps and fuses. Warranty of batteries only applies to batteries that have beensold by Liebert and installed as an integral part of the UPS system.

If the UPS fails to conform with the above warranty within the stated period, Liebert will repair or replace the UPS, at Liebert'soption. Replacement parts will only carry the benefit of the unexpired portion of the main equipment warranty. Purchaser to makewarranty claim, should on first instance contact the Dealer/Retailer from whom the unit was purchased, supplying the model type,rating and serial number along with a fault description.

LIFE SUPPORT APPLICATIONS

Due to the diversity of applications and considerations to be applied in each case, Liebert does not recommend or knowingly sell itsproducts for such use.

The responsibilty for risk assessment and management in applications where the malfunction or failure of the UPS could bereasonably be expected to give rise to risk of human life shall be the sole responsibility of the purchaser. Liebert accepts no liabilityfor consequential harm in such applications.

Issue 3 (01/03/98) 7-1

7-2 Issue 3 (01/03/98)

Chapter 7 - Liebert Warranty AP4300

AP4300 Series UPS Specification

INPUT DATA UNITS AP4307 AP4310 AP4315 AP4320

Input line voltage (nominal) V ac 400V 3 Phase

Continuous input voltage Operational range V ac 320V to 480V*

Input bypass voltage line and neutralTolerance

V ac 400V 3 Phase (programmable to 380 or 415V)default: ±10% (programmable to ±15%)

Input kVA at maximum rated load including battery charging kVA 8,1 10,4 16 21

Power factor at rated kW load - ³0.95 ³0.95

Max input power at rated kW load including battery charging kW 7,7 9,8 15,2 20

Nominal input current at rated kW load, including batterycharging (i.e. @ 400V supply)

A 11,7 15,0 23,4 30

Max input current at rated kW load, including battery charging(i.e. @ 320V supply)

A 14,5 18,6 29,0 37,2

Nominal Input frequency Hz 50 or 60

Max permissible input frequency variation for synchronisedoperation

Hz ±5

Conducted and radiated EMC levels - EN 55022 A

Compliant safety standards - EN 50091-1

Compliant immunity standards - EN 50082-1IEC 801( Parts 2, 3, 4 & 5.)

Note 1: Unless otherwise specified all voltage and current values stated in this specification are rms.

*Note2: Below 320V ±2% unit will transfer to battery

Above 480V ±2% unit will transfer to battery

INTERMEDIATE DC CIRCUIT DATA UNITS AP4307 AP4310 AP4315 AP4320

Number of valve regulated lead acid batteries (12V) - 32 2 x 32

Type of battery (recommended) Yuasa NP 11-12 (or equivalent)

Nominal battery float voltage @ 20oC Vdc 437 ±0.5%

End of battery discharge voltage Vdc 320 ±1%

Battery capacity (default)** Ahr 11 2 x 11

Battery autonomy time (Typical) mins. 17 14 17 14

Maximum charging current A mean 2.8 5.6

Battery fuse rating (FS1 & FS2) and (FS3) A 30(Bussman KLM-30A

500Vd.c.)

50(Bussman FWP-50A14F

700Vd.c.)

**Note 3: Battery Capacity

Battery performance depends on the ambient battery temperature. Capacity and autonomy times are quoted for a new battery operating at 20°C.

Battery capacity is increased by 1% for every 1°C increase in temperature up to 25°C.

If a battery is used at a temperature above 25°C, its life is reduced; consequently its capacity and UPS autonomy time will reduce more rapidly over a

period of time. Battery float voltage is compensated (by 3mV per °C per cell).

Issue 3 (01/03/98) 8-1

pthomsen

Note

Initial charge cycle after discharge will maintain a constant current regime of 2.8 amp for 7.5/10kVA, 5.6 amp for 15/20kVA to raise the voltage over time until the float voltage is reached. When float voltage is reached charger will cycle to maintain float voltage for a 24 hour period. The next 24 hour period is a coast cycle and no charge period then starts a 1 hour charge 24 hour float cycle.

OUTPUT DATA UNITS AP4307 AP4310 AP4315 AP4320

Output voltage Nominal Vac 3 Phase - 400Vadjustable 361V to 436V

1 Phase - 230Vadjustable 200V - 250V

Output voltage regulation % ±1

Voltage Balance (L-N, L-L)Balanced Load100% unbalanced load

% ±1±2

Output voltage distortion with 100% linear load % <3,0

Phase BalanceBalanced Load100% unbalanced load

120° ±1°120° ±°

Output frequency Hz 50 or 60

Output frequency tolerance while synchronised to input mainssupply

Hz ±5

Maximum rated output kVA (balanced load)Maximum rated output power (balanced load)

kVAkW

7,56

108

1512

2016

Nominal UPS efficiency at 100% linear load, not includingbattery charging

% 88 89 87 89

Output overload ability (for kW and for kVA)(load will transfer to static bypass if times are exceeded)

% up to110% continuous125% for 10 mins

150% for 60 seconds200% for 5 seconds

Inverter output peak current limit (max. transient) A pk 45 90

Continuous Bypass rating A 14 18 28 36

Internal overload protection on static bypass (Type C circuitbreaker)

A 20 40

MECHANICAL CHARACTERISTICS UNITS AP4307 AP4310 AP4315 AP4320

Dimensions: WidthHeightDepth

mm4271100682

6571100682

Weight (without batteries) kg 122 176

Weight (with batteries) kg 250 432

Colour - RAL 7035/7038

Ventilation - internal fans - 4 fans 6 fans

Enclosure - IP22

Airflow m3/hr 130 325

Operating temperature (range) °C 0 to +40

Max altitude for full rating m 1000

Nominal heat dissipation (fully charged battery) kW 1,2 1,3 2,3 2,6

Acoustic noise level for rated load at 1 metre dBA <54 58

Relative Humidity - 0-90% non-condensing

This equipment is manufactured byLiebert Swindon Limited, Elgin Drive, Swindon,

Wilts SN2 6DX, United KingdomTelephone: +44 (0) 1793 553355 Fax: +44 (0) 1793 553400

a BS EN ISO9001:1994 registered company.

8-2 Issue 3 (01/03/98)

AP4300 Series UPS Specification AP4300

Parameter Settings for the AP4300

This table permits a record to be kept of any changes made to the software default settings during commissioning.The commissioningengineer will enter the values of any changed parameters and sign where indicated.

Parameter Range Setting

Max Min Default New Setting

OUTPUT VOLTS

HIGH FAIL 264 231 253

NOMINAL VOLTS 250 200 230

LOW WARN 216 198 207

LOW FAIL 204 187 195

BYPASS VOLTS

HIGH FAIL 276 253 265

HIGH WARN 264 242 253

LOW WARN 216 198 207

LOW FAIL 204 187 195

PRIMARY DC BUS (DC Volts)

HIGH FAIL 705 645 660

HIGH WARN 705 619 650

LOW WARN 400 320 390

LOW FAIL 300 300 300

SECONDARY DC BUS (DC Volts)

HIGH FAIL 840 820 840

HIGH WARN 840 820 820

LOW WARN 760 740 760

LOW FAIL 740 660 700

BATTERY VOLTAGES

HIGH FAIL 488 431 460

HIGH WARN 468 413 441

NOM FLOAT 462 408 437

NOMINAL 427 377 402

LOW WARN 391 328 350

LOW FAIL 330 290 310

EOD VOLTS 340 300 320

Issue 3 (01/03/98) 8-3

Parameter Range Setting

Max Min Default New Setting

BATTERY CAPACITY (Ampere Hours)

CAPACITY 240 1 12

BATTERY WARNING TIME (Seconds)

LOW BAT WARN TIME 1800 60 300

TEMPERATURES (Deg °C)

FAIL 75 55 65

INVERTER 65 50 55

CONVERTER 70 50 55

BATTERY 40 30 35

AMBIENT 40 30 30

PHASE LOCKED LOOP (PLL)

OP frequency (Hz x 10) - fixed by firmware installed

FREQUENCY 500

Capture Range (Hz x 10)

CAPTURE RG 50 1 20

Lock Range on Inverter (Hz x 10)

LOCK (INV) 50 1 25

Lock Range on Bypass (Hz x 10)

LOCK (BYP) 50 1 50

Slew Rate (Hz per sec x 10)

SLEW 20 1 10

In Phase Range (msec)

IN LOCK 200 120 120

MISCALLANEOUS

DUMMY 0 (not used)

SHUTDOWN ALLOWED 0

LAST OP STATE 1

AUTORESTART 1 0 1

Note: Parameter settings which are not normally changed are indicated by a tint in the corresponding cell in the New Setting column.

UPS MODEL....................................................................Name:......................................................................................................

SER. NO...........................................................................Signature............................................................Date..............................

8-4 Issue 3 (01/03/98)

Parameter Settings for the AP4300 AP4300

Keeping Business in BusinessTM

AP4300 Three Phase

7.5 to 20 kVA 50 or 60Hz.

Series AP4300 UPS

The Company Behind The Products

With more than 500,000 installations around the globe,Liebert is the world leader in computer protectionsystems. Since its founding in 1965, Liebert hasdeveloped a complete range of support and protectionsystems for sensitive electronics

+ Environmental systems close-control airconditioning from 1.5 to 600 tons.

+ Power conditioning and UPS with power rangesfrom 400 VA to more than 1000 kVA.

+ Integrated systems that provide both environmentaland power protection in a single, flexible package.

+ Monitoring and control - on-site or remote - fromsystems of any size or location

+ Service and support, through more than 100 servicecentres around the world and a 24 hour CustomerResponse Centre

While every precaution has been taken to ensure accuracy and completeness in this manual,Liebert Corporation assumes no responsibility and disclaim all liability for damagesresulting from use of this information or for any errors or omissions.

©1997 Liebert Corporation. All rights reserved throughout the world.Specifications subject to change without notice.

All names referred to are trademarks or registered trademarks of their respective owners.

Liebert CorporationGlobe Park, Marlow,

Buckinghamshire SL7 1YG

United Kingdom

Tel: +44 (0) 1628 403200

Fax: +44 (0) 1628 403203

Liebert Français124 Avenue Galliéni,

93170 Bagnolet, France

Tél: +33 (0) 1 43 60 0177

Fax: +33 (0) 1 43 60 7007

Liebert GmbHLiebigstraße 9, D-85551 Kirchheim,

B.München, Deutschland

Tel: +49 (0) 89 991 9220

Fax: +49 (0) 89 904 3151

Liebert BVBosstraat 96, Postbus 9100,

6070 AC Swalmen, Netherland

Tel: +31 (0) 475 504050

Fax: +31 (0) 475 502876

Liebert SiceVia G Rossini 6,

20098 San Giuliano Milanese,

Milano, Italia

Tel: +39 (0) 2 982501

Fax: +39 (0) 9844633

Liebert Web Sitehttp:/www.liebert.com

4300-7-20-04569270

Documents

manufacturer

published

flexible metal

emc directive

common inputbypass

double pole

inputbattery

liebert approved