GE Consumer & Industrial Power Quality Energy Commander ™ Paralleling Switchgear Reliability Systems in which part of the load is very critical may be best served by paralleling one or more generator sets. Under parallel operation all the generator sets are started at once. The first set to reach the proper parameters will assume the most critical portion of the load, with the remaining sets picking up lower priority loads. In addition, by using a load shedding application, the failure of one generator set will not interrupt power to the critical loads, as less important loads can be dropped off the line. Flexibility Paralleling power sources allows for a wide variety of choices in the gen- eration, distribution and utilization of the system’s power. Paralleling Switchgear Paralleling is an operation in which multiple power sources, usually two or more generator sets, are connected and syn- chronized to a common bus (same parameters in regards to frequency, phase angle, etc.). Why Energy Commander ™ ? Energy Commander has been providing customer facilities with reliable power switching systems for many years and continues its excellence into the 21 st century. Since the inception of paralleling switchgear, many successful Energy Commander installations have been supplied with a focus on providing reliability. Energy Commander has become the leader in supplying solutions to simple and very complex systems due to its design flexibility. Energy Commander has evolved and adapted to the changing technologies in engine generator design, switchgear controls and monitoring systems. It reflects GE’s continuing commitment to reliable solutions for critical power applications. Why Parallel? There are several advantages to be realized when employing paralleling switchgear in an electrical design such as increased reliability, flexibility, ease of uninterruptible maintenance and application/operation cost savings. It is because of these advantages that paralleling switchgear has become one of the best choices for meeting today’s power requirements. Cost Savings Savings can be realized on the application when a number of smaller sets would be less expensive than one large set or when the load makes it impractical to divide into several sections, each with it’s own generator. Savings can also occur on the operation side when generator set life is extended from being used only when needed to support the load. Also, when it is anticipated that the load will grow significantly in the future, the capital investment can be reduced by starting with small sets and paralleling additional units as load increases dictate. Uninterruptible Maintenance When one engine - generator set is out of service for maintenance or repair, having others synchronized on the same bus can provide the needed back-up power, should an outage occur.
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GE Consumer & IndustrialPower Quality
Energy Commander™
Paralleling Switchgear
ReliabilitySystems in which part of the load is very critical may be best servedby paralleling one or more generator sets. Under parallel operationall the generator sets are started at once. The first set to reach theproper parameters will assume the most critical portion of the load,with the remaining sets picking up lower priority loads. In addition, byusing a load shedding application, the failure of one generator setwill not interrupt power to the critical loads, as less important loadscan be dropped off the line.
FlexibilityParalleling power sourcesallows for a wide varietyof choices in the gen-eration, distributionand utilization of thesystem’s power.
Paralleling SwitchgearParalleling is an operation in which multiple power sources,usually two or more generator sets, are connected and syn-chronized to a common bus (same parameters in regards to frequency, phase angle, etc.).
Why Energy Commander™ ?Energy Commander has been providing customer facilities with reliable power switching systems for many years andcontinues its excellenceinto the 21st century.Since the inception ofparalleling switchgear,many successfulEnergy Commanderinstallations have beensupplied with a focuson providing reliability.
Energy Commander has become the leaderin supplying solutionsto simple and verycomplex systems dueto its design flexibility.
Energy Commander hasevolved and adapted to the changing technologies in engine generator design,switchgear controls and monitoring systems. It reflects GE’s continuing commitment to reliable solutions for criticalpower applications.
Why Parallel?There are several advantages to be realized when employingparalleling switchgear in an electrical design such as increasedreliability, flexibility, ease of uninterruptible maintenance andapplication/operation cost savings. It is because of these advantages that paralleling switchgear has become one of the best choices for meeting today’s power requirements.
Cost SavingsSavings can be realized on the application when a number ofsmaller sets would be less expensive than one large set or whenthe load makes it impractical to divide into several sections,each with it’s own generator. Savings can also occur on theoperation side when generator set life is extended from beingused only when needed to support the load. Also, when it isanticipated that the load will grow significantly in the future, the capital investment can be reduced by starting with smallsets and paralleling additional units as load increases dictate.
UninterruptibleMaintenanceWhen one engine -generator set is out ofservice for maintenanceor repair, having otherssynchronized on the
same bus can providethe needed back-up power,
should an outage occur.
System ReliabilityThe Energy Commander Paralleling Switchgear product has severalhardwired features which ensures trouble-free operation andmaximum reliability. Annunciator panels, load control switches andmeters are all hardwired components. Upon the unlikely failure ofthe master control, a back-up engine start operation is hard-wired into the system. Also the programmable logic controller(PLC) which runs automatic operations is backed up with a truehardwired manual control.
Finally, as a leader of paralleling switchgear technology, EnergyCommander has an extensive array of successful, trouble-freeinstallations around the globe. The breadth of experience andsystem complexity all make Energy Commander second to nonein the industry.
Outside
1 GE Multilin Protective Relays
2 Annunciator Boxes
3 Metering
4 GE Fanuc Operator Interface Panel
5 Control Switches &Breaker Status Indicators
GE Power Breakers
6 Utility
7 Feeder
8 Generator Main
9 Generator
Inside
1 Engine Generator Controller
2 GE Fanuc ProgrammableLogic Controller
3 Wire Hiding Raceways,Relays, Terminal Blocks and Power Supply
23
4
1
5
6
7
8
9
PB-2102 • Page 2
System Benefits
2
1
3
Ease of Use & OperationsA Master HMI panel can be useful to paralleling switchgear systemsfor user access and monitoring. The key control and monitoringfunctions in these systems include metering, annunciation, con-trolling breakers and engine generators in automatic operations,as well as manual.
This monitoring and control should be carefully considered whenselecting which type of HMI is best suited for the operator andhis facility. The greatest reliability in monitoring and controlfunctions is realized with hardwired analog meters, switches and annunciation indicators, with very limited HMI access needsby the operator.
In some cases, critical facilities may be suitable for additionalsystem monitoring, trouble-shooting and remote access ability.Operators in this case will require a more advanced Master HMI inaddition to the system hardwired meters, switches and annunci-ation. The Energy Commander ACS “Advanced Control System” is recommended for these cases.
The Energy Commander Operator Interface Panel (OIP) is idealfor simpler systems. Since status of the system can be viewedin front of the line-up, including all source metering, alarm, shut-down and status annunciation, the operator is not required toutilize the OIP to cycle through any screens for the system controland monitoring. The user is only required to use the touch panelfor system testing purposes, non-critical settings and timingadjustments, and limited manual control redundant to the hardwired switches.
Standard Operator Interface Panel (OIP)> Intuitive interface makes operation simple. Little or no
learning curve is required to operate the system.
> A main screen with navigation buttons and non-system critical button/switches.
> System testing screen allowing the operator to manually initiate automatic system testing operations.
> Generator interface settings latched into the PLC control system upon entry.
> System load add/shed manual control redundant to hardwired manual control switches in master control.
> Generator optimization settings latched into the PLC control system upon entry.
Optional Advanced Control System (ACS) for Special Applications> Full functions of OIP with the addition of SCADA capabilities.
> Optionally Internet capable - allows remote access via web.
> Online controllable / programmable (behind customer’s own firewall).
> Advanced Event Logging & Source Trending allows statisticalroot cause analysis.
> Duplicates System & Generator Annunciation.
> Remote system diagnostics.
> Alarm and maintenance messaging, including predictive maintenance.
> Graphical user interface. Intuitive and user-friendly. Requires NO computer experience.
> Password protection. Capable of hundreds of levels of authority.
Page 3 • PB-2102
System Benefits
Emergency or Standby Power> Features
The emergency system is used to supply power to building loads duringa power failure.
Paralleling switchgear controls the system transfer to generators and return back to normal sequences of operations.
Paralleling switchgear controls theaddition of load on/off generators(load add/shed).
Transfers between utilities and gener-ators occur in open transition or passivemomentary closed transition (no activesynchronization of sources).
> Components
System typically consists of parallelingswitchgear product and automatictransfer switches of which GE has awide variety for many applications.
Generator Generator
Emergency
ATS
Emergency
ATS
> Configuration Example
Prime Power> Features
On-site prime power systems are mostoften used where there is no utilitysource available.
The required electricity is generatedentirely on-site, typically at facilitiessuch as island resorts, mines, mills or other remote locations.
Since utility is not available in primepower systems, ATS’s/ATO’s and utility/tie breakers are not required.
> Components
Generators are the only source of power.The system typically consists of PSGproduct with no ATS/ATO products.
Generator Generator
Load Load
PB-2102 • Page 4
System Applications
> Configuration Example
Parallel with Utility> Features
Parallel with utility systems are utilizedwhenever generators are to be activelysynchronized and paralleled with utilitysources for short or long durations.
These systems are often also usedfor standby use as well.
PSG controls the generators transferoperations with the utility source(s) as well as the power management(loading controls) to direct power theappropriate direction.
Transfers may occur in short duration(momentary closed transition), a some-what longer duration (softload/unload closed transition), or a sustained duration(maintained parallel with utility).
Power management in maintainedparallel situations includes controllingimport levels from utility, export levelsto utility, or base load levels wheregenerators are loaded to set amountdisregarding the import and exportcontribution from utility.
“Co-generation” is often used formaximizing generator efficiency with heat recovery systems.
> Components
System combines generators with utility sources. It typically consists of PSG product which handles theATS/ATO operations.
10 2 4 6 88 12Noon
11 3 5 79 1
ON OFF
UtilityPurchased Power
GeneratorNon-Purchased Power
kW Demand Threshold
Time
kW
Utility
Generator Generator
Feeders
HeatRecoverySystem
Heat Load
Exhaust
> Configuration Example
Parallel with Utility application with “Co-Generation” heat recovery system.
> Components
System combines generators with utility sources. It typically consists of PSG product which handles theATS/ATO operations.
> Peak Shave Example
A “Peak Shaving” application is some-times used to transfer non-criticalloads onto generators during peakutility demand hours.
System Applications
PB-2102 • Page 5
PB-2102 (10/07)
GE Consumer & Industrial – Power Quality701 E 22nd Street, Lombard, IL 60148 USA
800 637 1738 www.geindustrial.com/psg
Information subject to change without notice. Please verify all details with GE. © 2007 General Electric Company All Rights Reserved
Extensive Customer Service and SupportSupported by a worldwide network of factory-trained Authorized ServiceCenters, our Technical Service Representatives can provide you withfield service, equipment parts and preventive maintenance.
Because emergency power systems are required to operate under themost adverse circumstances, site personnel may be called upon at anytime to make decisions regarding the operation of the system, thereforetraining of these personnel is critical to the future of any installation.
GE Power Quality offers a variety of training options including on-siteclasses for project personnel, factory instruction on your equipmentprior to shipment and service schools covering transfer switches andswitchgear systems.
Product OverviewWhen you purchase emergency power equipment, reliability and qualityare a necessity. GE Power Quality is committed to providing the highestlevel of quality demanded by the industry. Our complete product linewill allow you to specify a total power management system while maintaining overall compatibility and the most comprehensive warranty in the industry.
Commitment to the CustomerAll team members at GE Power Quality are aware of the critical situationsin which our products are called upon to perform. With that understandingcomes an obligation beyond merely fulfilling an order or turning out aproduct. Serving that obligation is our mission at GE Power Quality.
GE Power Quality’s team works with you from the first phone call throughcompleted start-up. Then, working hand in hand with the consultingengineer, the contractor and the facility owner/operator, we’ll ensurethat the system fulfills both current and future needs.
“Commitment to our customer” has been GE Power Quality’s drivingforce for more than 100 years in the power control industry. This samesense of purpose and responsibility will continue as we address futurepower control challenges.
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