Contents · 2017. 6. 22. · capacitor start, 16 amp switch with 165 volt cut out, catalog number would be CV-16-165 as follows: SINPAC Electronic Switch Catalog Numbering System

Brief Operating Description: Longer Motor Life Starts with a Switch

S-795-1 1

For over 75 years, single-phase motorshave utilized a mechanical centrifugalswitch to switch the start circuit.Inherent characteristics of amechanical device have made theseswitches prone to various problems,including tolerances, tolerance build-ups, mechanical fatigue, vibration anda host of others that can lead to switchfailures and/or performanceinconsistency.

Our challenge was to design a reliablesolid-state switch to replace themechanical switch and actuatormechanism that would duplicate thefunction of connecting anddisconnecting the start circuit atparticular speeds with the additionalbenefits of a solid-state device. Afterconsiderable research, we decided asuccessful electronic motor startingswitch could be created by sensing thevoltages present in the main and startwindings.

Until the rotor of a single-phase motorbegins to rotate, there is no couplingbetween its start winding and mainwinding. When the rotor begins to turn,the main winding induces flux in therotor, which then induces a voltage inthe start winding. The voltage inducedin the start winding is directlyproportional to motor speed.

In Stearns SINPAC ElectronicSwitches, the voltage across a motor’smain winding and the voltage acrossits start winding are sampled and fedto a comparator. The logic circuitry isdesigned so that the electronic switchinterrupts the start circuit current afterthe motor has accelerated to the speedat which cut out voltage is developed,generally 75 to 80% of synchronousmotor speed. The logic circuitry thenshuts down the switch’s power stage,which consists of a triac or inverseparallel SCR’s. This function is referredto as “cut out.” When the start circuit isdisconnected, the main winding fieldthen drives the motor’s rotor to itsrunning speed.

If the motor encounters an overload,and the motor speed falls toapproximately 50% of its synchronousspeed, the SINPAC Switchautomatically reconnects the motor’sstart circuit. This function is referred toas “cut in.” Cut in detection circuitryconstantly monitors start windingvoltage. When the motor’s speed fallsto the cut in point, the detection circuitcauses the control logic to energize theSINPAC Switch’s power output stage.The motor then goes through itsnormal startup procedure, with thestart circuit being switched out at a

motor speed approximately 75 to 80%of synchronous speed.

SINPAC Switches are potted andcompletely sealed, making itimpervious to dust, dirt and moisture.The unique speed sensing circuitprovides a universal design whichallows a few switches to work on moststandard motor designs regardless ofmanufacturer.

Acceptance by MotorManufacturersUS and foreign motor manufacturershave tested and retested the SINPACSwitch for reliability and quality. Today,many of these manufacturers havebegun installing SINPAC Switches ontheir standard motor lines with morecompanies ready to make thechangeover.

UL RecognitionMany SINPAC Switches have alreadybeen recognized under the ComponentProgram of Underwriters Laboratories,Inc. (E-71115). In addition, all switcheshave internal surge protection which istested according to IEEE C62.41 –1991 Category A3.

CSA Certification LR-6254.

ContentsBrief Operation Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Typical Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Design Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Models and Mounting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4SINPAC Switch Ordering and Identification Information . . . . . . . . . . . . . . . . . . . . . . . 5Overview of Standard Product Offering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7Split Phase Motors

PV Series for 115 VAC Start Circuit (1/2 typical max. motor hp) . . . . . . . . . . . . 8-92PV Series for 230 VAC Start Circuit (1 typical max. motor hp) . . . . . . . . . . . . . 8-9

Capacitor Start MotorsCV Series for 115 VAC Start Circuit (2 typical max. motor hp) . . . . . . . . . . . . . 10-112CV Series for 230 VAC Start Circuit (5 typical max. motor hp) . . . . . . . . . . . . . 16-17

Capacitor Start Motors Instant ReversingIR Series for 115 VAC Start Circuit (2 typical max. motor hp) . . . . . . . . . . . . . 20-21

Capacitor Start/Capacitor Run MotorsVR Series for 115 VAC Start Circuit (3 typical max. motor hp) . . . . . . . . . . . . . 12-132VR Series for 230 VAC Start Circuit (5 typical max. motor hp) . . . . . . . . . . . . . 16-17

Capacitor Start and Capacitor Start/Capacitor Run MotorsCVR Series for 115 VAC Start Circuit (3 typical max. motor hp) . . . . . . . . . . . . . 14-152CVR Series for 230 VAC Start Circuit (10 typical max. motor hp) . . . . . . . . . . . . 18-19

Installation Instructions for SINPAC Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-25Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26-27Procedure for Checking SINPAC Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Distributors of SINPAC Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Worldwide Sales and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Performance Parameters and Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Typical ApplicationsStearns SINPAC Switches are idealfor applications requiring reliableswitching of the start circuit in single-phase motors.

Mechanical switches are prone tovarious problems includingmechanical fatigue, tolerances,tolerance build-ups and vibrationwhich can lead to performanceinconsistency.

Electronic SINPAC Switches solve allthose problems which reduceproduction downtime in hundreds ofapplications. Some of theseapplications are illustrated below:

• Grain Dryers• Water Equipment• Power Tools• Commercial Dryers• Commercial Washing Machines• Ice Makers• Gas Pumps• Floor Washers• Bottle Washing Machines• Floor Sanders• Poultry Feeding Systems• Fans, Blowers• Grinding Machines• Milking Machines• Winches• 50/60 Hz• Hoists

• Paint Sprayers• Vacuum Pumps• Air Compressors• Pressure Sprayers• Vibrators• Auger Drives• Door Openers• Sump Pumps• Diaphragm Pumps• Hermetic Motors• Rotary Compressors• Refrigeration Compressors• Heat Pumps• Jet Pumps• Submersible Pumps• Food Processing

Some additional applications include:

Door andpartition systems

Hoists

Swimming pool pump motors

Vacuum pumps

Gate lifts

Submersiblepumps

Aircompressors

2

Design Features

S-795-2 3

• Speed SensitiveSINPAC Switches duplicatemechanical switch performance.They cut out the start circuit atapproximately 80% of synchronousspeed*. This means nodegradation in motor performanceand no confusing and cumbersometime or current selection criteria toconsider, since SINPAC Switchesare not load sensitive. It alsomeans there will be less stress onthe starting capacitor due to overvoltage.

• Restart CapabilityWhen motor speed drops below50% of synchronous speed, thestart circuit is reconnected toreinitiate starting torque.

• Accepted by MotorManufacturersStearns SINPAC Switches havebeen tested with favorable resultsand are available from most single-phase motor manufacturers.

• Transient ProtectionTransient protection tested perIEEE C62.41 – 1991Category A3.

• Line Voltage CompensationNo modifications or changes arerequired for line voltage variations.SINPAC Switches will operate inareas susceptible to brown-outs orlow voltage due to long wiring runs.

• Electrically Protected DesignSINPAC Switches are designed tofilter out electrical noise, so thereis no concern of random switchmalfunctions.

• UL Recognition and CSACertificationTesting has been completed andapproval has been obtained onmost sizes and will be obtained onthe balance of the product line.SINPAC Switches can be usedwith confidence in their safety andacceptance.

• Completely Solid-StateWith no moving parts, SINPACSwitches have no physicalconstraints to affect their operation.Can be used on new or existingmotors.No wearing parts means highcycling. No shaft extensionrequired. Not restricted by motorvibration or overspeed. No arcingcontacts due to restart duringmotor coastdown.

• Universal DesignSINPAC Switches will work on 2, 4,6 or more pole motors of anymanufacturer. This reduces motormanufacture and repair shopselection time and switch inventory.It also means that foreign andobsolete motors can be easilyretrofitted with SINPAC Switches.

• Environmentally ProtectedSINPAC Switches are immune tomoisture, dust, shock, vibration oroverspeed. The switch will not limitmotor performance due toenvironmental conditions.

• Stearns ReliabilityYears of experience in the motorindustry, first with brakes and nowwith speed sensing switches,means you can depend on StearnsSINPAC Switches to solveswitching problems.

• Unlimited MountingLocationsSINPAC Switches offer a variety ofexternal and internal conduit boxmountings and external endbellmountings. These mountings arenot affected by the motor position(shaft up or shaft down). SINPACSwitches can also be mounted atlocations remote from the motor.

• Reduced Installation TimeEasy accessible terminals andmounting, reduce the amount oftime required to install SINPACSwitches.

• Integral DesignSINPAC Switches can reduce thelength of the motor when designedas an integral part of the motor.

*Contact factory for questions on specific switch/motor performance.

Models

Mounting Options

4

20 Style

19 Style15 Style

17 Style

12 Style

11 Style

Gasket(available for 11 and 12 Styles)

S-795-3 5

SINPAC Switch Ordering and Identification Information

CV-16-165 – Each stock electronicseries switch is uniquely specified byan alphanumerical catalog number.For most standard SINPACElectronic Switches, the catalogidentifies a particular switch,including voltage, series, currentrating, and cut out or cut in voltage.The first position indicates the startcircuit voltage (blank equals 115 volts

and 2 equals 230 volts). The nextcharacters specify the series or typeof motor on which the switch shouldbe used. The next numericcharacters specify the maximumcurrent which the switch can handle.The next numeric grouping specifiescut out voltage for capacitor start,capacitor start/capacitor run, andinstant reversing switches and cut in

voltage for the PV Switches. TheTable shown on Page 6 providesinformation for selecting appropriatecatalog number when ordering aStearns electronic switch.

For example, when ordering acapacitor start, 16 amp switch with165 volt cut out, catalog numberwould be CV-16-165 as follows:

SINPAC Electronic Switch Catalog Numbering System

CV – 16 – 165Start Winding Voltage Cut Out Voltage (Cut In PV)blank = 115, 2 = 230

Maximum Current RatingSeriesCVR = Capacitor Start and Capacitor Start/Capacitor Run Motors, PV = Split Phase Only,CV - Capacitor Start Only, VR = Capacitor Start/Capacitor Run Only, IR = Capacitor Start Instant Reverse

Each Stearns SINPAC ElectronicSwitch is uniquely specified by a 12-digit alphanumeric part number. Formost standard SINPAC ElectronicSwitches, the last 10 positionsidentify the specific switch, including

series, voltage, option, current,enclosure, agency recognition, cut inor cut out voltages. For example,when ordering capacitor start, 16amp SINPAC Electronic Switch, theswitch would be specified as shown.

The following examples and tablesprovide information for selecting theappropriate 12-digit part numberwhen ordering a Stearns SINPACElectronic Switch.

4–7–21016–11–UO1

Electronics

6 = Switchpac (6 switches)7 = SINPAC Switch

1 = PV Series - Split Phase Only2 = CV Series - Capacitor Start Only3 = Made-To-Order (MTO)*4 = CVR Series - Capacitor Start and

Capacitor Start/Capacitor Run5 = IR Series - Capacitor Start Only6 = Timer - Fixed Timer Split Phase

or Capacitor Start7 = VR Series - Capacitor Start/

Capacitor Run Only

1 = 115 Start Circuit Voltage2 = 230 Start Circuit Voltage

O = StandardA = Inductor

Amps (max. current)12, 16, 25, 35, 40, 50, 55, 70, 80 or 90

1 = Standard, 2 = Standard, K = Kit

115 V SINPAC SwitchA = 130 VCO, B = 147 VCO, O = 165 VCOO = 400 mS Timing Interval, 30 V Cut InD = 180 VCOF = 400 mS Timing Interval, 10 V Cut InJ = 155 VCO Hybrid 6BK = 165 VCO Hybrid 6L = 130 VCO 15 VCIP = 800 mS Timing Interval, 30 V Cut InR = 115 VCOT = 600 mS Timing Interval, 10 V Cut InV = 210 VCOW = 200 mS Timing Interval, 30 V Cut InY = 200 mS Timing Interval, 10 V Cut In

230 V SINPAC SwitchC = 260 VCO, O = 310 VCO, E = 410 VCOH = 400 mS Timing Interval, 60 V Cut InM = 340 VCO, S = 350 VCOT = 600 mS Timing Interval, 60 V Cut In

U = UL Recognized, N = Not UL

Package Style11 = Metal Can 2.48 x 1.38 x .8112 = Metal Can 2.67 x 1.78 x .8615 = Capacitor Case 1.822 dia. x 3.372 long16 = Metal Can 2.75 x 2.0 x 1.12517 = Capacitor Case 2.572 dia. x 4.372 long19 = Capacitor Case 1.447 dia. x 3.372 long20 = Capacitor Case 1.447 dia. x 2.760 long21 = Board Only

*NOTE: For part numbers beginning with 473(these are OEM specials), the remaining digitsof this numbering system do not apply.

6

Overview of Standard Product Offering

230Volts

115/230Volts

115Volts

12-1319371654-7-71050-19-NO11155025/12.525312-1312371654-7-71050-12-UO1VR-50-1651155025/12.5253

12-1319371474-7-71050-19-NB11155025/12.5253

12-1312371474-7-71050-12-UB11155025/12.5253

12-1319301304-7-71050-19-NA11155025/12.5253

12-1312301304-7-71050-12-UA1VR-50-1301155025/12.5253

12-1319371654-7-71040-19-NO11154020/10202

12-1312371654-7-71040-12-UO1VR-40-1651154020/10202

12-1319371474-7-71040-19-NB11154020/10202

12-1312371474-7-71040-12-UB11154020/10202

12-1319301304-7-71040-19-NA11154020/10202

12-1312301304-7-71040-12-UA1VR-40-1301154020/10202

12-1319371654-7-71016-19-NO1115168/481/2

12-1312371654-7-71016-12-UO1VR-16-165115168/481/2

12-1319371474-7-71016-19-NB1115168/481/2

12-1312371474-7-71016-12-UB1115168/481/2

12-1319301304-7-71016-19-NA1115168/481/2

12-1312301304-7-71016-12-UA1VR-16-130115168/481/2

VR Series –for Capacitor

Start/CapacitorRun Motors

Only

10-1120371654-7-21050-20-UO11155025/12.5253

10-1111371654-7-21050-11-UO2CV-40-1651155025/12.5253

10-1120371474-7-21050-20-UB11155025/12.5253

10-1111371474-7-21050-11-UB11155025/12.5253

10-1120301304-7-21050-20-UA11155025/12.5253

10-1111301304-7-21050-11-UA1CV-40-1301155025/12.5253

10-1120371654-7-21040-20-UO11154020/10202

10-1111371654-7-21040-11-UO2CV-40-1651154020/10202

10-1120371474-7-21040-20-UB11154020/10202

10-1111371474-7-21040-11-UB11154020/10202

10-1120301304-7-21040-20-UA11154020/10202

10-1111301304-7-21040-11-UA1CV-40-1301154020/10202

10-1120371654-7-21025-20-UO11152512/661

10-1111371654-7-21025-11-UO2CV-25-1651152512/661

10-1120371474-7-21025-20-UB11152512/661

10-1111371474-7-21025-11-UB11152512/661

10-1120301304-7-21025-20-UA11152512/661

10-1111301304-7-21025-11-UA1CV-25-1301152512/661

10-1120371654-7-21016-20-UO1115168/481/2

10-1111371654-7-21016-11-UO2CV-16-165115168/481/2

10-1120371474-7-21016-20-UB1115168/481/2

10-1111371474-7-21016-11-UB1115168/481/2

10-1120301304-7-21016-20-UA1115168/481/2

10-1111301304-7-21016-11-UA1CV-16-130115168/481/2

CV Series –for CapacitorStart Motors

Only

8-92030–4-7-11016-20-UO11152512/6121/2

8-91130–4-7-11016-11-UO1PV-25-301152512/6121/2

8-92010–4-7-11016-20-UF11152512/6121/2

8-91110–4-7-11016-11-UF1PV-25-101152512/6121/2

8-91160–4-7-12016-11-NH12PV-16-602301681/2

8-92030–4-7-11016-20-UO1115168/481/3

8-91130–4-7-11016-11-UO1PV-16-10115168/481/3

8-92010–4-7-11016-20-UF1115168/481/3

8-91110–4-7-11016-11-UF1PV-16-10115168/481/3

PV Series –for Split Phase

Motors Only

CatalogPage

Pkg.Style

CutIn

VoltageTypical

CutOut

VoltageTypical

Part NumberCatalogNumber

StartCircuitVoltage

Switch Rating& Permissible

Maximum StartCircuit Current

(amps)

Typical Full LoadMotor Nameplate

Current Rating (amps)

TypicalMax.Motor

hp

Series

7S-795-4

20-2115371654-7-51040-15-UO1IR-25-1651154020/10202

20-2115331474-7-51040-15-UB1IR-25-1471154020/10202

20-2115301304-7-51040-15-UA1IR-25-1301154020/10202

20-2115371654-7-51025-15-UO1IR-25-1651152512/6121/2

20-2115331474-7-51025-15-UB1IR-25-1471152512/6121/2

20-2115301304-7-51025-15-UA1IR-25-1301152512/6121/2

IR Series –for Instant Reverse

Capacitor StartMotors Only

18-1917703104-7-42090-17-UO12CVR-70-310230904510

18-1917702604-7-42090-17-UC12CVR-70-260230904510

18-1917703104-7-42070-17-UO12CVR-70-31023070357.5

18-1917702604-7-42070-17-UC12CVR-70-26023070357.52CVR Series –for Capacitor Start

and CapacitorStart/Capacitor

Run Motors Only

16-1715703104-7-72050-15-UO12VR-50-31023050255

16-1715702604-7-72050-15-UC12VR-50-26023050255

16-1715703104-7-72035-15-UO12VR-35-3102303517.53

16-1715702604-7-72035-15-UC12VR-35-2602303517.532VR Series –Capacitor Startand CapacitorStart/Capacitor

Run Motors Only

16-1715703104-7-22050-15-UO12CV-50-31023050255

16-1715702604-7-22050-15-UC12CV-50-26023050255

16-1715703104-7-22035-15-UO12CV-35-3102303517.53

16-1715702604-7-22035-15-UC12CV-35-2602303517.53

2CV Series –for Capacitor

Start Motors Only

14-1515371654-7-41080-15-NO1CVR-80-1651158050/25503-5

14-1515371474-7-41080-15-NB1CVR-80-1471158050/25503-5

14-1515301304-7-41080-15-NA1CVR-80-1301158050/25503-5CVR Series –for Capacitor

Start/CapacitorRun Motors Only

CatalogPage

Pkg.Style

CutIn

VoltageTypical

CutOut

VoltageTypical


StartCircuitVoltage

Switch Rating& Permissible

Maximum StartCircuit Current

(amps)


Current Rating (amps)

TypicalMax.Motor

hp

Series230

Volts115/230

Volts115

Volts

PV and 2PV Series for 115 Vac, 230 Vac or 115/230 VacDual Voltage Split Phase Motors

8

Basic OperationThe PV Series SINPAC uses a pulse sampling technique to monitorRPM-sensitive information (induced voltage) across the motor startwinding. After the initial timing period, solid-state logic will sample theinduced voltage across the start winding and will repeat thissequence until the voltage across the start winding is above the cut-inreference value. The SINPAC logic circuit continues to monitor theRPM-sensitive information (induced voltage) on the start winding. Ifthe SINPAC logic detects that the motor RPM drops below a certainpoint, it automatically recloses the solid-state switch reconnecting thestart winding. Both the initial timing period and cut-in reference valuecan be modified to meet specific applications.

The PV Series SINPAC is available in three current ratings: 16, 25and 40 amps.

Dimensions are for estimating only. Drawings for customer reference are available upon request.

a Electrically Protected. Designed to filter out electricalnoise, so there is no concern of random switchmalfunction.

b Reduced Installation Time. Easy accessible 1/4 inchterminals and mounting, reduce the amount of timerequired to install SINPAC Switches or to change outmechanical switches.

c Restart Capability. When motor speed drops below50% of synchronous speed, the start winding isbrought back into the circuit to reinitiate starting torque.

d Soldered Heat Sink. High cycling.e Transient Protection. Transient protection tested per

IEEE C62.41 - 1991 Category A3.f Universal Design. 50/60 Hz operation. Will work on 2,

4 or 6 pole motors of any manufacturer. Reducedinventory.

g Line Voltage Compensation. No modifications orchanges are required for line voltage variations.SINPAC Switches will operate in areas susceptible tobrown-outs or low voltage due to long wiring runs.

a

g

g

c

b

d

e

ef

a

b

c

f

Gasket AvailableSee dimensions

on Page 9

ADDITIONAL FEATURES

• Capacitor Shape. Makes for easy mounting under a motordoghouse (20 package style).

• Environmentally Protected. Immune to moisture, dust, dirt,shock and vibration.

• UL and Canadian UL Recognition (on 115 Vac models).• Completely Solid-State with No Moving Parts. SINPAC

Switches have no physical constraints to affect their operation.

No wearing parts mean high cycling, no arcing contact. Lowwarranty.

• Silent Operation - no switch noise• Operating Temperature: -40°C to 65 °C (-40 °F to 149°F) [for

operation between 65°C and 85°C (149°F and 185°F), consultfactory.]

• Operating Voltage: 115 Vac SINPAC Switch: 90-130 Vac. Fordual voltage motor equipped with center-tapped main winding:90-130 Vac or 180-265 Vac.

S-795-5 9

115/230Volts

115Volts

1120

3030

.4

.44-7-11040-11-UO14-7-11040-20-UO1

PV-40-30–

115115

4040

20/1020/10

2020

3/43/4

11201120

10103030

.4

.4

.4

.4

4-7-11025-11-UF14-7-11025-20-UF14-7-11025-11-UO14-7-11025-20-UO1

PV-25-10–

PV-25-30–

115115115115

25252525

12/612/612/612/6

12121212

1/21/21/21/2

11

11201120

60

10103030

.4

.4

.4

.4

.4

4-7-12016-11-NH1

4-7-11016-11-UF14-7-11016-20-UF14-7-11016-11-UO14-7-11016-20-UO1

2PV-16-60

PV-16-10–

PV-16-30–

230

115115115115

16

16161616

8

8/48/48/48/4

–

8888

1/2

1/31/31/31/3

PackageStyle

Cut InVoltageTypical

TimingInterval*

(sec.)Part NumberCatalog

Number

StartCircuitVoltage

Switch Rating andPermissible

Maximum StartCapacitor

Current (amps)


Current Rating (amps)Typical

MaximumMotor hp

Line VoltageCompensation ChartInduced voltage across the start windingis directly proportional to motor speedand line voltage. All SINPAC Switchesuse this voltage to switch the startwinding out of the circuit. Your motor witha SINPAC Switch must generate avoltage that is 20% greater than theswitch cut in reference voltage to assurecut out of the start winding. Refer tocharts below.

SelectionMotor hp ratings are typical. For an accurate selection procedure, measure startwinding current during a normal start or at locked rotor and select a SINPACSwitch with higher maximum current rating than that measured.

1. Be sure switch series matches motor type.

2. Be sure switch voltage rating matches (start) circuit voltage rating.

3. Selection can be based on actual measurement of start winding current ortwo times the motor nameplate FLA rating.

4. Switch current rating must match or exceed the motor start winding currentrequirements. Always select a SINPAC Switch with the next higher current ratingfor:a) High cycling applications.

b) Long acceleration time.

c) High ambients: Greater than 55° C.

5. To assure proper motor operation, the voltage across the start winding mustreach the SINPAC Switch cut in reference voltage between 70% to 85% ofmotors synchronous speed.

Caution: SINPAC Switches are line voltage compensated. Changes in the linevoltage will not effect system operation unless an overload condition causesreduced running speed, along with reduced voltage across the start winding.

6. Higher current switches can be used in place of lower rated switches of thesame series.

Wiring Diagram

2PV-16

Connectto

Split PhaseMotors

PV-16PV-25PV-40

Connectto SplitPhaseMotors

230 Volt 50/60 HzMotor Operation


SINPACSwitchRating

CatalogNumber

*NOTE FOR PV SWITCH APPLICATIONS: Please contact the factory for special sampling time intervals or cut in voltage. Standard sample time interval is .04 seconds.

130

120

110

100

900 10 20 30 40 50 60

Start Winding Volts

Line

Vol

tage

10

30

60

Cut In VoltagePV

50/60 Hz, Typical

Not Applicable

M – Motor main winding, ST – Motor start winding

Gasket

CV Series for 115 Vac or 115/230 VacDual Voltage Capacitor Start Motors

10

Basic OperationCapacitor start motor require a method to extract speed datafrom the voltage across the motor start winding. Bycomparing the start winding RPM-sensitive voltage with themain AC input voltage (which serves as a reference voltage),the switch determines when the start circuit should beenergized. The electronic switch interrupts the start circuitcurrent after the motor has accelerated to the cut out speed,and reconnects the start circuit whenever the motor speedhas fallen to cut in speed (usually about 50% of synchronousmotor speed).


ADDITIONAL FEATURES• Capacitor Shape. Makes for easy mounting under a motor

doghouse (20 package style).• Environmentally Protected. Immune to moisture, dust, dirt,

shock and vibration.• UL and Canadian UL Recognition (also CSA Certification on

11 package).• Completely Solid-State with No Moving Parts. SINPAC






a Electrically Protected. Designed to filter outelectrical noise, so there is no concern ofrandom switch malfunction.

b Reduced Installation Time. Easy accessible1/4 inch terminals and mounting, reduce theamount of time required to install SINPACSwitches or to change out mechanical switches.

c Restart Capability. When motor speed dropsbelow 50% of synchronous speed, the startcircuit is reconnected to reinitiate startingtorque.

d Soldered Heat Sink. High cycling.e Transient Protection. Transient protection

tested per IEEE C62.41 - 1991 Category A3.f Universal Design. 50/60 Hz operation. Will

work on 2, 4 or 6 pole motors of anymanufacturer. Reduced inventory.

g Line Voltage Compensation. No modificationsor changes are required for line voltagevariations. SINPAC Switches will operate inareas susceptible to brown-outs or low voltagedue to long wiring runs. It also means there willbe less stress on the starting capacitor due toover voltage.

a

b

g

g

c

d

e

e

f

abc

d

f

Gasket AvailableSee dimensions

on Page 11

S-795-6 11

115/230Volts

115Volts

112011201120

112011201120

303037373737

303037373737

130130147147165165

130130147147165165

4-7-21050-11-UA14-7-21050-20-UA14-7-21050-11-UB14-7-21050-20-UB14-7-21050-11-UO24-7-21050-20-UO1

4-7-21040-11-UA14-7-21040-20-UA14-7-21040-11-UB14-7-21040-20-UB14-7-21040-11-UO24-7-21040-20-UO1

CV-50-130–

CV-50-147–

CV-50-165–

CV-40-130–

CV-40-147–

CV-40-165–

115115115115115115

115115115115115115

505050505050

404040404040

25/12.525/12.525/12.525/12.525/12.525/12.5

20/1020/1020/1020/1020/1020/10

252525252525

202020202020

333333

222222

112011201120

303037373737

130130147147165165

4-7-21025-11-UA14-7-21025-20-UA14-7-21025-11-UB14-7-21025-20-UB14-7-21025-11-UO24-7-21025-20-UO1

CV-25-130–

CV-25-147–

CV-25-165–

115115115115115115

252525252525

12/612/612/612/612/612/6

121212121212

111111

112011201120

303037373737

130130147147165165

4-7-21016-11-UA14-7-21016-20-UA14-7-21016-11-UB14-7-21016-20-UB14-7-21016-11-UO24-7-21016-20-UO1

CV-16-130–

CV-16-147–

CV-16-165–

115115115115115115

161616161616

8/48/48/48/48/48/4

888888

1/21/21/21/21/21/2

PackageStyle


Cut OutVoltageTypical


StartCircuitVoltage



Current (amps)



MaximumMotor hp

Line VoltageCompensation ChartsInduced voltage across the start windingis directly proportional to motor speedand line voltage. All SINPAC Switchesuse this voltage to switch the startcapacitor out of the circuit. Your motorwith a SINPAC Switch must generate avoltage that is 20% greater than theswitch cut out voltage to assure cut out ofthe start capacitor. Refer to charts below.

SelectionMotor hp ratings are typical. For an accurate selection procedure, measure startcapacitor current during a normal start or at locked rotor and select a SINPACSwitch with higher maximum current rating than that measured.



3. Selection can be based on actual measurement of start capacitor current or twotimes the motor nameplate FLA rating.

4. Switch current rating must match or exceed the motor start capacitor currentrequirements. Always select a SINPAC Switch with the next higher currentrating for:a) High cycling applications.



5. To assure proper motor operation, the voltage across the start winding mustreach the SINPAC Switch cut out reference voltage between 70% to 85% ofmotors synchronous speed.



Wiring Diagram

CV-16CV-25CV-40CV-50

Connectto

CapacitorStart

Motors



SINPACSwitchRating

CatalogNumber

130

130

147

165

Cut Out VoltageCV

50/60 Hz, Typical

120

110

100

90120 130 140 150 160 170 180

Start Winding Volts

Line

Vol

tage

130

130

147, 165

Cut In VoltageCV

50/60 Hz, Typical

120

110

100

9025 30 35 40 45 50 55

Start Winding Volts

Line

Vol

tage

Gasket

CS – Start Capacitor, M – Motor main winding, ST – Motor start winding

VR Series for 115 Vac or 115/230 Vac Dual Voltage CapacitorStart/Capacitor Run Motors

12

Basic OperationCapacitor start/capacitor run motors provide continuous voltage sensinginformation which can be used to extract speed data from the voltage across themotor start winding. By comparing this start winding RPM-sensitive voltage to themain AC input voltage (which serves as a reference voltage), the switchdetermines when the start circuit should be de-energized. The electronic switchinterrupts the start circuit current after the motor has accelerated to the cut outvoltage (speed), and reconnects the start circuit whenever the speed sensitivecircuit senses the motor voltage (speed) has decreased to a preselected cut involtage (RPM) level.

Capacitor start/capacitor run motors exhibit current transients and higher voltagesacross the start switch. These electrical stresses occur due to the switching of thetwo capacitors (start and run) that are connected in parallel during motor startand may have different voltages at time of restart. These stresses occur at restartwith both mechanical and electronic start switches. The VR switch featurescircuitry designed to eliminate the effects of these conditions.



doghouse (19 package style).• Environmentally Protected. Immune to moisture, dust, dirt,

shock and vibration.• UL and Canadian UL Recognition for VR-12 - pending for

VR-19 package.• Completely Solid-State with No Moving Parts. SINPAC






a Bleeder Resistor. Increases start capacitor life.b Electrically Protected. Designed to filter out electrical

noise, so there is no concern of random switchmalfunction.

c Reduced Installation Time. Easy accessible 1/4 inchterminals and mounting, reduce the amount of timerequired to install SINPAC Switches or to change outmechanical switches.

d Restart Capability. When motor speed drops below50% of synchronous speed, the start circuit isreconnected to reinitiate starting torque.

e Soldered Heat Sink. High cycling.f Transient Protection. Transient protection tested per

IEEE C62.41 - 1991 Category A3.g Universal Design. 50/60 Hz operation. Will work on 2,

4 or 6 pole motors of any manufacturer. Reducedinventory.

h Zero Voltage Detection Logic/Inductor. Currentspiking due to run capacitor no longer a problem.

i Line Voltage Compensation. No modifications orchanges are required for line voltage variations.SINPAC Switches will operate in areas susceptible tobrown-outs or low voltage due to long wiring runs. Linevoltage compansation results in less stress on thestarting capacitor due to overvoltage.

a

b

g

g

c

d

e

f

h

i

a

b c

d

f

h

i

S-795-7 13

115/230Volts

115Volts

121912191219

303037373737

130130147147165165

4-7-71050-12-UA14-7-71050-19-NA14-7-71050-12-UB14-7-71050-19-NB14-7-71050-12-UO14-7-71050-19-NO1

VR-50-130–––

VR-50-165–

115115115115115115

505050505050

50/2550/2550/2550/2550/2550/25

252525252525

333333

121912191219

303037373737

130130147147165165

4-7-71040-12-UA14-7-71040-19-NA14-7-71040-12-UB14-7-71040-19-NB14-7-71040-12-UO14-7-71040-19-NO1

VR-40-130–––

VR-40-165–

115115115115115115

404040404040

20/1020/1020/1020/1020/1020/10

202020202020

222222

121912191219

303037373737

130130147147165165

4-7-71016-12-UA14-7-71016-19-NA14-7-71016-12-UB14-7-71016-19-NB14-7-71016-12-UO14-7-71016-19-NO1

VR-16-130–––

VR-16-165–

115115115115115115

161616161616

8/48/48/48/48/48/4

888888

1/21/21/21/21/21/2

PackageStyle




StartCircuitVoltage



Current (amps)



MaximumMotor hp

Line VoltageCompensation ChartsInduced voltage across the start windingis directly proportional to motor speedand line voltage. All SINPAC Switchesuse this voltage to switch the startcapacitor out of the circuit. Your motorwith a SINPAC Switch must generate avoltage greater than the switch referencevoltage to assure cut-out of the startcapacitor. Refer to charts below.



2. Be sure switch voltage rating matches auxiliary (start) circuit voltage rating.

3. Selection can be based on actual measurement of start capacitor current ortwo times the motor nameplate FLA rating.





SINPAC Switches are line voltage compensated. Changes in the line voltagewill not effect system operation unless an overload condition causes reducedrunning speed, along with reduced voltage across the start winding.


Wiring Diagram

VR-16VR-40VR-50

Connect toCapacitor

Start/Capacitor

RunMotors



SINPACSwitchRating

CatalogNumber

130

130

147

165

Cut Out VoltageVR

50/60 Hz, Typical

120

110

100

90120 130 140 150 160 170 180

Start Winding Volts

Line

Vol

tage

130

130

147, 165

Cut In VoltageVR

50/60 Hz, Typical

120

110

100

9025 30 35 40 45 50 55

Start Winding Volts

Line

Vol

tage

Gasket

14

CVR Series for 115 Vac or 115/230 Vac Dual VoltageCapacitor Start and Capacitor Start/Capacitor Run MotorsBasic OperationCapacitor start/capacitor run motors and capacitor start motors provide continuous voltagesensing information which can be used to extract speed data from the voltage across themotor start winding. By comparing this start winding RPM-sensitive voltage to the main ACinput voltage (which serves as a reference voltage), the switch determines when the startcircuit should be de-energized. The electronic switch interrupts the start circuit currentafter the motor has accelerated to the cut out voltage (speed), and reconnects the startcircuit whenever the speed sensitive circuit senses the motor voltage (speed) hasdecreased to a preselected cut in voltage (RPM) level.

Capacitor start/capacitor run motors exhibit current transients and higher voltages acrossthe start switch. These electrical stresses occur due to the switching of the two capacitors(start and run) that are connected in parallel during motor start and may have differentvoltages at time of restart. These stresses occur at restart with both mechanical andelectronic start switches. The CVR switch has additional circuitry to eliminate the effects ofthese conditions.



doghouse.• Environmentally Protected. Immune to moisture, dust, dirt,

shock and vibration.• Silent Operation - no switch noise• Completely Solid-State with No Moving Parts. SINPAC



• Operating Temperature: -40°C to 65 °C (-40 °F to 149°F) [foroperation between 65°C and 85°C (149°F and 185°F), consultfactory.]


Universal Design. 50/60 Hz operation.Will work on 2, 4 or 6 pole motors of anymanufacturer. Reduced inventory.

Line Voltage Compensation.Operating voltage 190 to260 Vac.

Electrically Protected.Designed to filter out electrical noise,so there is no concern of randomswitch malfunction.

Zero Crossing Logic.Current spiking due to run capacitorno longer a problem.

Start Capacitor DischargeResistor. Increase startcapacitor life.

Transient Protection.Transient protection tested perIEEE C62.41 - 1991 Category A3.

Soldered Heat Sink.High cycling.

Environmentally Protected.Immune to moisture, dust, dirt,

shock and vibration.

Speed Sensitive(cut in)

S-795-8 15

230Volts

115Volts

151515

504550

130147165

4-7-41080-15-NA14-7-41080-15-NB14-7-41080-15-NO1

CVR-80-130CVR-80-147CVR-80-165

115115115

808080

–––

505050

3-53-53-5

PackageStyle




StartCircuitVoltage



Current (amps)



MaximumMotor hp

Line VoltageCompensation ChartsInduced voltage across the start windingis directly proportional to motor speedand line voltage. All SINPAC Switchesuse this voltage to switch the startcapacitor out of the circuit. Your motorwith a SINPAC Switch must generate avoltage greater than the switch cut outvoltage to assure cut out of the startcapacitor. Refer to charts below.



2. Be sure switch voltage rating matches auxiliary (start) winding voltage rating.








Wiring Diagram

CVR-80

Connectto

CapacitorStart/

CapacitorRun

Motors



SINPACSwitchRating

CatalogNumber

CS– Start capacitor, M – Motor main winding, CR – Run capacitor, ST – Motor start winding

130

130

147

165

Cut Out VoltageCVR

50/60 Hz, Typical

120

110

100

90120 130 140 150 160 170 180

Start Winding Volts

Line

Vol

tage

130

147

130165

Cut In VoltageCVR

50/60 Hz, Typical

120

110

100

9025 30 35 40 45 50 55

Start Winding Volts

Line

Vol

tage

2CV and 2VR Series for 230 Vac Capacitor Startand Capacitor Start/Capacitor Run Motors

16

Basic OperationCapacitor start/capacitor run motors and capacitor start motors provide continuousvoltage sensing information which can be used to extract speed data from the voltageacross the motor start (auxiliary) winding. By comparing this start (auxiliary) windingRPM-sensitive voltage to the main AC input voltage (which serves as a referencevoltage), the switch determines when the start circuit should be de-energized. Theelectronic switch interrupts the start circuit current after the motor has accelerated to thecut out speed, and reconnects the start circuit whenever the motor speed has decreasedto a preselected cut in RPM level.

Capacitor start/capacitor run motors exhibit current transients and higher voltages acrossthe start switch. This electrical stress is due to the voltage differential which may existbetween the start and run capacitors at the instant of switch closure. This stressphenomenon occurs with both mechanical and electronic type start switches. SINPACSwitches have voltage detection circuitry to minimize the effects of these conditions.


ADDITIONAL FEATURES• Silent Operation - no switch noise• Completely Solid-State with No Moving Parts. SINPAC

Switches have no physical constraints to affect their operation.No wearing parts mean high cycling, no arcing contact.

• Optional inductor for heavy duty operation.

• Ambient 40° to 65°C.• Operating Temperature: -40°C to 65 °C (-40 °F to 149°F) [for


• Operating Voltage: 230 Vac SINPAC Switch: 190-255 Vac.• UL Recognition and CSA Certification.

Universal Design. 50/60 Hz operation.Will work on 2, 4 or 6 pole motors of anymanufacturer. Reduced inventory.

Line Voltage CompensationOperating voltage 190 to 260 Vac.

Electrically ProtectedDesigned to filter out electrical noise, so thereis no concern of random switch malfunction.

Zero Crossing LogicCurrent spiking due to runcapacitor no longer a problem.

Start Capacitor Discharge ResistorIncrease start capacitor life.

Transient ProtectionTransient protection tested perIEEE C62.41 - 1991 Category A3.

Soldered Heat SinkHigh cycling.

Environmentally ProtectedImmune to moisture, dust, dirt,



S-795-9 17

230Volts

115Volts

1515

1515

1515

1515

7070

7070

7070

7070

260310

260310

260310

260310

4-7-72050-15-UC14-7-72050-15-UO1

4-7-72035-15-UC14-7-72035-15-UO1

4-7-22050-15-UC14-7-22050-15-UO1

4-7-22035-15-UC14-7-22035-15-UO1

2VR-50-2602VR-50-310

2VR-35-2602VR-35-310

2CV-50-2602CV-50-310

2CV-35-2602CV-35-310

230230

230230

230230

230230

5050

3535

5050

3535

2525

1717

2525

1717

––

––

––

––

55

33

55

33

PackageStyle




StartCircuitVoltage



Current (amps)



MaximumMotor hp

Line VoltageCompensation ChartsInduced voltage across the start windingis directly proportional to motor speedand line voltage. All SINPAC Switchesuse this voltage to switch the startcapacitor out of the circuit. Your motorwith a SINPAC Switch must generate avoltage greater than the switch cut outvoltage to assure cut out of the startcapacitor. Refer to charts below.









Caution: SINPAC Switches are line voltage compensated. Changes in the linevoltage will not effect system operation unless an overload condition causesreduced running speed, along with reduced voltage on the start winding.


Wiring Diagram

2VR-352VR-50

Connect toCapacitor

Start/Capacitor

RunMotors

2CV-352CV-50

Connectto

CapacitorStart

Motors



SINPACSwitchRating

CatalogNumber

Not Applicable

Not Applicable


260

260V

310V

240

220

200

180200 300 400 500

Start (Auxiliary) Winding Volts


Line

Vol

tage

Cut Out Voltage2CV, 2VR-15

50/60 Hz, Typical

260

260V,310V

240

220

200

18060 70 1009080 110

Line

Vol

tage

Cut In Voltage2CV, 2VR-15

50/60 Hz, Typical

230 Volts

18

2CVR Series for 230 Vac Capacitor Startand Capacitor Start/Capacitor Run MotorsBasic OperationCapacitor start/capacitor run motors and capacitor start motors provide continuousvoltage sensing information which can be used to extract speed data from the voltageacross the motor start (auxiliary) winding. By comparing this start (auxiliary) windingRPM-sensitive voltage to the main AC input voltage (which serves as a referencevoltage), the switch determines when the start circuit should be de-energized. Theelectronic switch interrupts the start circuit current after the motor has accelerated tothe cut out voltage (speed), and reconnects the start circuit whenever the motorvoltage (speed) has decreased to a preselected cut in RPM level.

Capacitor start/capacitor run motor exhibit current transients and higher voltagesacross the start switch. These electrical stresses occur due to the switching of thetwo capacitors (start and run) that are connected in parallel during motor start andmay have different voltages at time of restart. These stresses occur at restart withboth mechanical and electronic start switches. The CVR switch has additionalcircuitry to eliminate the effects of these conditions.


ADDITIONAL FEATURES• Silent Operation - no switch noise• Completely Solid-State with No Moving Parts. SINPAC

Switches have no physical constraints to affect their operation.No wearing parts mean high cycling, no arcing contact.

• Optional inductor for heavy duty operation.

• Ambient 40° to 65°C.• Operating Temperature: -40°C to 65 °C (-40 °F to 149°F) [for


• Operating Voltage: 230 Vac SINPAC Switch: 190-255 Vac.

Universal Design50/60 Hz operation. Will work on 2, 4 or 6 polemotors of any manufacturer. Reduced inventory.

Line Voltage CompensationOperating voltage 190 to 260 Vac.

Electrically ProtectedDesigned to filter out electrical noise, so thereis no concern of random switch malfunction.

Zero Crossing LogicCurrent spiking due to runcapacitor no longer a problem.

Transient ProtectionTransient protectiontested per IEEE C62.41 -1991 Category A3.


Environmentally ProtectedImmune to moisture, dust, dirt,



S-795-10 19

230Volts

115Volts

1717

1717

7070

7070

260310

260310

4-7-42090-17-NC14-7-42090-17-NO1

4-7-42070-17-NC14-7-42070-17-NO1

2CVR-90-2602CVR-90-310

2CVR-70-2602CVR-70-310

230230

230230

9090

7070

4545

3535

––

––

1010

71/271/2

PackageStyle




StartCircuitVoltage



Current (amps)



MaximumMotor hp


SelectionMotor hp ratings are typical. For an accurate selection procedure, measure startcircuit current during a normal start or at locked rotor and select a SINPACSwitch with higher maximum current rating than that measured.






c) High ambients: Greater than 55°C.

5. To assure proper motor operation, the voltage across the start (auxiliary)winding must reach the SINPAC Switch cut out voltage reference between70% to 85% of motors synchronous speed.

Caution: SINPAC Switches are line voltage compensated. Changes in theline voltage will not effect system operation unless an overload conditioncauses reduced running speed, along with reduced voltage across the start(auxiliary) winding.


Wiring Diagram

2CVR-702CVR-90

Connect toCapacitor

Start/Capacitor

RunMotors

2CVR-702CVR-90

Connectto

CapacitorStart

Motors



SINPACSwitchRating

CatalogNumber

Not Applicable

Not Applicable


260

260V

310V

240

220

200

180200 300 400 500



Line

Vol

tage

Cut Out Voltage2CVR

50/60 Hz, Typical

260

260V310V

240

220

200

18060 70 1009080 110

Line

Vol

tage

Cut In Voltage2CVR

50/60 Hz, Typical

230 Volts

20

IR Series for Instant Reversing 115 Vac or 115/230Vac Dual Voltage Capacitor Start MotorsBasic OperationBidirectional motors - those that can rotate in either direction – areof two classes: 1. Reversing motors, which can change from fullspeed in one direction to full speed in the opposite direction.2. Reversible motors, which can be reversed only when the motor isnot running, or is running below cut out speed. Some motormanufacturers distinguish between quick reversing and instantreversing. A quick reversing motor requires a time delay ofapproximately 1/25th of a second or more for the switching circuitryto react. An instant reversing motor requires absolutely no timedelay. The standard SINPAC Switch can be used on reversible andreversing motors. The SINPAC IR Series Switch provides thefunction of a direction sensing centrifugal switch and makes areversible capacitor start motor into an instant reversing motor.

In order to reverse a single-phase motor, it is necessary to reversethe polarity of either the start or main winding, but not both at thesame time. The reversal of the winding is accomplished with an

external reversing switch or contactor that is not part of the SINPACSwitch. SINPAC Instant Reverse Switch is not dependent upon howquickly the user operates the reversing switch, but only that thereversing switch did change states, i.e., forward to reverse, or viceversa. The SINPAC Switch detects the change in the phase shiftbetween the main and start windings, and the logic circuit instantlyactuates the starting switch, causing thestart circuit to be reconnected to linevoltage. This connection causes themotor to decelerate and thenreaccelerate in the opposite direction.The SINPAC IR Series Switch interruptsthe start circuit current after the motorhas accelerated to the cut out speed, andreconnects the start circuit whenever thecircuit senses the motor speed has fallento cut in speed (usually about 50% ofsynchronous motor speed).


ADDITIONAL FEATURES• UL recognition and CSA certification.• Completely solid-state with no moving parts. SINPAC

Switches have no physical constraints to affect their operation. Nowearing parts mean high cycling, no arcing contact. Low warranty

• Silent operation - no switch noise

• Operating Temperature: -40°C to 65 °C (-40 °F to 149°F) [foroperation between 65°C and 85°C (149°F and 185°F), consultfactory.]

• Operating Voltage: 115 Vac SINPAC Switch: 90-130 Vac.For dual voltage motor equipped with center-tapped mainwinding: 90-130 Vac or 180-265 Vac.

Universal Design50/60 Hz operation. Will workon 2, 4 or 6 pole motors of anymanufacturer. Reducedinventory.

Line Voltage CompensationNo modifications or changes are required for linevoltage variations. SINPAC Switches will operate inareas susceptible to brown-outs or low voltage due tolong wiring runs. It also means there will be less stresson the starting capacitor due to over voltage.

Electrically Protected. Designed to filter outelectrical noise, so there is no concern ofrandom switch malfunction.

Restart Capability. Whenmotor speed drops below 50%of synchronous speed, the startcircuit is reconnected toreinitiate starting torque.

Transient ProtectionTransient protection testedper IEEE C62.41 - 1991Category A3.

Reduced Installation Time. Easyaccessible 1/4 inch terminals andmounting, reduce the amount of timerequired to install SINPAC Switches or tochange out mechanical switches.


Environmentally Protected.Immune to moisture, dust, dirt,


Phase Comparator Logic:Allows Instant Reverse operation(no time delay).

S-795- 21

115/230Volts

115Volts

151515

151515

303337

303337

130147165

130147165

4-7-51040-15-UA14-7-51040-15-UB14-7-51040-15-UO1

4-7-51025-15-UA14-7-51025-15-UB14-7-51025-15-UO1

IR-40-130IR-40-147IR-40-165

IR-25-130IR-25-147IR-25-165

115115115

115115115

404040

252525

20/1020/1020/10

12/612/612/6

202020

121212

222

1/21/21/2

PackageStyle




StartCircuitVoltage



Current (amps)



MaximumMotor hp


SelectionMotor hp ratings are typical. For an accurate selection procedure, measure startcircuit current during a normal start or at locked rotor and select a SINPAC Switchwith higher maximum current rating than that measured.



3. Selection can be based on actual measurement of start capacitor current or twotimes the motor nameplate FLA rating.

4. Switch current rating must match or exceed the motor start capacitor current re-quirements. Always select a SINPAC Switch with the next higher current rating for:a) High cycling applications.b) Long acceleration time.c) High ambients: Greater than 55° C.

5. To assure proper motor operation, the voltage across the start winding mustreach the SINPAC Switch cut out voltage reference between 70% to 85% ofmotors synchronous speed.

Caution: SINPAC Switches are line voltage compensated. Changes in the linevoltage will not effect system operation unless an overload condition causesreduced running speed, along with reduced voltage on the start winding.


Wiring Diagram

IR-25IR-40

Connectto InstantReverse

StartMotors



SINPACSwitchRating

CatalogNumber

CS– Start capacitor, M – Motor main winding, ST – Motor start winding, F – Forward, R – Reverse

115 Volts

130

130

147

165

Cut Out VoltageIR

50/60 Hz, Typical

120

110

100

90120 130 140 150 160 170 180

Start Winding Volts

Line

Vol

tage

130

130

147

165

Cut In VoltageIR

50/60 Hz, Typical

120

110

100

9025 30 35 40 45 50 55

Start Winding Volts

Line

Vol

tage

Drum switch is not part ofSINPAC Switch.

Reversing contacts are not part ofSINPAC Switch.



115 Volt Operation Dual VoltageMotor Using Two Full Voltage

2 or 3 Pole Single-PhaseReversing Contactors with

Mechanical Interlock(Electrical Interlock Optional)

230 Volt Operation Dual VoltageMotor Using Two Full Voltage

2 or 3 Pole Single-PhaseReversing Contactors with

Mechanical Interlock(Electrical Interlock Optional)

22

Installation Instructions for SINPAC SwitchesUL RecognitionMost SINPAC Switches are recognizedunder the component program ofUnderwriters Laboratories E-71115. Inaddition, all switches have an internalsurge protection which meets UL-244ASpecification and CSR CertificationLR-6254, and are tested to therequirement of IEEE C62.41-1991,Category A3.

ConstructionSINPAC Switches are potted andcompletely sealed making themimpervious to dust, dirt and moisture. Itcan be immersed in electric gradeoil as used in submersible pumps. Theunique speed sensing circuit providesa universal design which allows a fewswitches to work in most standardsingle-phase motor applicationsregardless of nature.

OperationThe Stearns SINPAC Switch samplesthe voltage across the motor startwinding (terminals 1 and 4) then it isfed into a comparator. The SINPACSwitch interrupts the start capacitorcurrent (between terminals 2 and 3)after the motor has accelerated to aspeed in which the cut out voltage hasbeen reached, generally 75% to 80%of synchronous motor speed. A triac orinverse parallel SCRs provides thefunction referred to as cut out. Oncethe start circuit is cut out the mainwinding accelerates the motor rotor upto its running speed. When an overloaddrops the motor speed toapproximately 50% of synchronousspeed the switch automaticallyreconnects the motor start circuit. TheSINPAC Switch constantly monitors thestart or auxiliary winding for cut involtage and will reconnect the startcircuit once cut in voltage is reached.

Selection ProcedureCAUTION: SINPAC Switches are linevoltage compensated. Changes in theline voltage within ±10% of nominal115 or 230 Vac will not affect systemoperation. Operation of the motor atline voltages less than -10% of nominalcan result in reduced motor runningspeeds and failure of the SINPACSwitch to disconnect the start circuit.

1. Be sure switch series matches motortype.

2. Be sure switch voltage ratingmatches the motor start circuitvoltage.

3. Selection should be based on actualmeasurement of start circuit current.

4. SINPAC Switch current rating mustmeet or exceed the motor startcircuit current requirement. Alwaysselect a SINPAC Switch with thenext higher current rating for:

a) High cycling applications: Stopand start rates greater than 4times/minute.

b) Long acceleration times: Greaterthan 5 seconds.

c) High ambients: Ambients greaterthan 55°C.

Note: Higher rated current switchescan be used in place of lower ratedswitches within the same series.

5. The motor must generate a voltageacross the start or auxiliary windingthat is 20% greater than the SINPACSwitch cut out/cut in voltage rating.

Capacitor Start and CapacitorStart/Capacitor Run MotorsTo determine the most appropriateSINPAC Switch cut out voltage ratingfor the particular motor application, thevoltage across the motor start orauxiliary winding must be measured.This may be accomplished in thefollowing manner:

1. Prepare the motor wiring forconnection of the SINPAC Switch asshown in the Wiring Diagrams forSINPAC Switches section of thispublication. Secure the motor to afirm mounting surface.

2. Connect the lead wire that is to beconnected to SINPAC Switchterminal #2 securely to the lead wirethat is to be connected to SINPACSwitch terminal #3.

3. Connect an AC voltmeter across thelead wires that are to be connectedto SINPAC Switch terminals #1 & #4.

4. Apply power to the motor. Observeand record the voltage across themotor start or auxiliary winding, asindicated by the AC voltmeter, withthe motor operating nearsynchronous speed.

CAUTION: Measurement of the startor auxiliary winding voltage must bedone quickly to prevent damage to thestart capacitor, motor winding orSINPAC Switch!

5. Multiply the measured voltage by 0.8(80%). Select a SINPAC Switchhaving a cut out voltage rating equalto or less than this number.

Capacitor Start and CapacitorStart/Capacitor Run Motors

*Consult factory

Split Phase MotorsTo determine the most appropriateSINPAC Switch cut in voltage rating forthe particular motor application, thevoltage across the motor start windingmust be measured. This may beaccomplished in the following manner:

1. Prepare the motor wiring forconnection of the SINPAC Switch asshown in the Wiring Diagrams forSINPAC Switches section of thispublication. Secure the motor to afirm mounting surface.

2. Insulate the lead wire that is to beconnected to SINPAC Switchterminal #2.

3. Connect an AC voltmeter across thelead wires that are to be connectedto SINPAC Switch terminals #1 & #3.

4. Apply power to the motor. Carefullyrotate the motor shaft to initiaterotation. Observe and record thevoltage across the motor startwinding, as indicated by the ACvoltmeter, with the motor operatingnear synchronous speed.

5. Multiply the measured voltage by 0.8(80%). Select a SINPAC Switchhaving cut in voltage rating closestto this number.

Split Phase Motors

*Consult factory

*230V<300V

260V230V300-369V

310V230V370-492V

410V230V>492V*115V<150V

130V115V150-175V

147V115V176-200V

165V115V>200V

Cut OutVoltageRating

Voltage AcrossSINPAC SwitchTerminals 1 & 2

MeasuredVoltage

*230V<70V

60V230V>70V*115V<15V

10V115V15-40V

30V115V>40V

Cut InVoltageRating

Voltage AcrossSINPAC SwitchTerminals 1 & 2

MeasuredVoltage

S-795-12 23

Caution: Application of 230 Vac to theline input terminals (1 and 2) of a 115Vac rated SINPAC Switch will result inimmediate switch failure. The switchmay rupture and emit smoke.

ImportantPlease read these instructions carefullybefore installing, operating, or servicingyour SINPAC Switch. Failure to complywith these instructions could causeinjury to personnel and/or damage toproperty if the switch is installed oroperated incorrectly. For definition oflimited warranty/liability, contactRexnord Corporation, Stearns Division,120 North Broadway, Milwaukee,Wisconsin 53202, (414) 272-1100.

Initial Inspection and HandlingUpon receipt, check for packagedamage. Note any signs of damage onappropriate shipper forms. Uponopening package, if concealed damageis found, immediately file a claim withcarrier.

Check the label to verify that dataconforms to specifications of orderedswitch and the connection diagramagrees with labeling.

Caution1. Installation and servicing must be

made in compliance with all localsafety codes includingOccupational safety and Health Act(OSHA). All wiring and electricalconnections must comply with theNational Electric Code (NEC) andlocal electric codes in effect.

2. To prevent an electrical hazard,disconnect power source beforeworking on the motor. If powerdisconnect point is out of sight, lockdisconnect in the off position andtag to prevent accidentalapplication of power.

3. Make certain power sourceconforms to the requirementsspecified on the SINPAC Switchnameplate.

4. Installation and servicing should beperformed only by qualifiedpersonnel familiar with theoperation of the SINPAC Switch.

5. Determine what type of start switchthe motor presently has:

a) Externally mounted electronicswitch – go to Step 6.

b) Internally mounted electronicswitch – go to Step 6.

c) Externally or internally mountedmechanical switch – it is not

necessary to remove theexisting centrifugal switchactuating mechanism, but iffeasible, it should be removedas it is no longer needed, andcan cause future mechanicalproblems in the motor shouldthe mechanism fail. Follow themanufacturers recommendationwhen removing the shaft endbearing, if necessary, to take offthe centrifugal actuator.

6. Remove the existing electronicswitch. Determine the existingwiring diagram. Mark the existingwires and determine which wirescan be reused for installation ofthe SINPAC Switch. Select alocation in the motor conduit box orendbell for mounting the SINPACSwitch.

If a metal enclosure version ofSINPAC Switch is being used, theswitch with SINPAC Switch gasketmay be mounted on an externalmounting surface such as theexterior of the conduit box. Plasticenclosure versions of the SINPACSwitch should be mountedinternally, within the conduit box, orexternally, under a capacitorhousing.

IMPORTANT: SINPAC Switch ina metal enclosure must havethe metal enclosure grounded.

The temperature at themounting location should notexceed 65°C (149°F). (2CVRtemperature should not exceed55°C.)

TEFC/TENV motors requireexternal mounting of SINPACSwitch.

7. Refer to motor manufacturer’swiring diagram to aid in identifyingterminal locations for the startwinding switch, start winding, startand run capacitors (if needed) andAC line.

8 Connect the SINPAC circuit per theconnection diagram (on Pages24-25 or 26-27) using insulatedterminals. If the connections aremade incorrectly, the result will beno starting torque and possibledamage to the circuit and/or motor.

CAUTION: Be sure thatappropriate insulation is usedbetween the terminals of the switchand the body of the motor orconduit box.

If mounted external to motor,always use gasket supplied withkit.

9. DO NOT USE a Variac to graduallyincrease the voltage to the motorstarting circuit when SINPACSwitch is installed.

10. Reassemble the motor withSINPAC Switch installed, so as tonot damage lead wires.

11. If the motor fails to start or the startwinding does not cut out properly,see Troubleshooting Guide (Page29).

12. Hipot test procedures:

Motors 250 Volts or Less and1/2 Horsepower or LessThe motor, equipped with SINPACSwitch, shall be tested for dielectricwithstand (hipot), by theapplication of a 1200 voltsinusoidal potential, in the range of40-70 Hz, for 1 second. During thetest, each lead of the primarymotor wiring, accessible at theconnection board or conduit box,are to be connected together andto one terminal of the testequipment, and the second testequipment terminal is to beconnected to the accessible deadmetal.

Motors 250 Volts or Less andMore Than 1/2 HorsepowerThe motor, equipped with SINPACSwitch, shall be tested for dielectricwithstand (hipot), by theapplication of an 1800 voltsinusoidal potential, in the range of40-70 Hz, for 1 second. During thetest, each lead of the primarymotor wiring, accessible at theconnection board or conduit box,are to be connected together andto one terminal of the testequipment, and the second testequipment terminal is to beconnected to the accessible deadmetal.

13. CAUTION: The terminals of theSINPAC Switch should not be usedas the junction for this field wiring.

24



SINPAC SwitchRatingCatalog Number

Not Application

230 Volts2CV-352CV-50

Connect toCapacitor Start

Motors Only

115 VoltsVR-16VR-40VR-50

CVR-80Connect toCapacitor


CV-16CV-25CV-40CV-50


Motors Only

115 Volts

Not Application

230 Volts

2PV-16Connect toSplit PhaseMotors Only

115 VoltsPV-16PV-25PV-40

Connect toSplit PhaseMotors Only

Wiring Diagrams for SINPAC Switches

3 2 1

3 2 1

230 Voperation

CS – Start Capacitor, M – Motor Main Winding, CR – run Capacitor, ST – Motor Start Winding

S-795-13 25



SINPAC SwitchRatingCatalog Number

Not Application

230 Volts2CVR-702CVR-90

Connect toCapacitor


Not Application

230 Volts2CVR-702CVR-90


Motors

IR-25IR-40

Connect toInstant ReverseCapacitor Start

Motors Only

Not Application

230 Volts2VR-352VR-50

Connect toCapacitor


CS – Start Capacitor, M – Motor Main Winding, CR – run Capacitor, ST – Motor Start Winding

115 Volt Operation Dual Voltage Motor Using TwoFull Voltage 2 or 3 Pole Single-Phase Reversing

Contactors with Mechanical Interlock(Electrical Interlock Optional)

230 Volt Operation Dual Voltage Motor Using TwoFull Voltage 2 or 3 Pole Single-Phase Reversing

Contactors with Mechanical Interlock(Electrical Interlock Optional)

Reversing contacts are not part of SINPAC Switch. Reversing contacts are not part of SINPAC Switch.

Reversing contacts are not part of SINPAC Switch.Drum switch is not part of SINPAC Switch.

115 Volts

Wiring Diagrams

26

EASY STEPSWIRING OF MOTOR

EQUIPPED WITHMECHANICAL SWITCH

EASY WIRING OF MOTOREQUIPPED WITH SINPAC

ELECTRONIC SWITCH

MOTOR LEAD WIRENUMBERING

Split Phase Motors1. Disconnect the mechanical

switch lead which isconnected to the startwinding and reconnect thislead to SINPAC Switchterminal three (3).

2. Disconnect other mechanicalswitch lead marked T5 andreconnect this lead toSINPAC Switch terminaltwo (2).

3. Join SINPAC Switch terminalone (1) with motor lead T8.

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Capacitor Start Motors1. Disconnect the mechanical

switch lead (CS1) which isconnected to the startcapacitor and reconnect thislead to SINPAC Switchterminal three (3).



4. Join SINPAC Switch terminalfour (4) with the lead off thestart winding and startcapacitor. (Labeled in theconnection diagram as CS2.)

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SYMBOL KEY: M = Main winding, ST = Start winding, CS = Start capacitor, CR = Run capacitor, CS1 = Lead between SINPAC Switchterminal three (3) and start capacitor (CS), CS2 = Lead between SINPAC Switch terminal four (4), start capacitor (CS) and start winding (ST)

Use on only the followingmodel series:PV-16, PV-25

PV-40 & 2PV-16

Use on only the followingmodel series:

CV-16CV-25CV-40CV-50VR-16VR-40VR-50

CVR-80IR-25IR-40

2CV-352CV-50

2CVR-702CVR-90

L1 L2 Join

Counterclockwiserotation P1 T4, T5 T1, T8

Clockwise rotation P1 T4, T8 T1, T5

–

T2,T3& T8

P2,T3& T5

P2,T5

T2,T4& T8

T4

P1

P1

Clockwiserotation

Clockwiserotation

–

T2,T3& T5

P2,T3& T8

P2,T8

T2,T4& T5

T4

P1

P1

Counterclock-wise rotation


Lowername-plate

voltage

Highername-plate

voltage

JoinJoinL2L1

Clockwiserotation


–

–

T2,T4& T8

T1,T3& T5

T2,T4& T5

T1,T3& T8

Clockwiserotation


T2,T3& T5

T2,T3& T8

Join

T4,T8T1

Lowername-plate

voltage

T4,T5T1Highername-plate

voltage

L2L1

T4, T8T1, T5Clockwise rotation

T4, T5T1, T8Counterclockwise

rotation

L2L1

T1, T5T4, T8P1Clockwise rotation

T1, T8T4, T5P1Counterclockwise

rotation

JoinL2L1



rotation

L2L1

S-795-14 27

SYMBOL KEY: M = Main winding, ST = Start winding, CS = Start capacitor, CR = Run capacitor, CS1 = Lead between SINPAC Switchterminal three (3) and start capacitor (CS), CS2 = Lead between SINPAC Switch terminal four (4), start capacitor (CS) and start winding (ST)

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Pro

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ionCapacitor Start/

Capacitor Run Motors1. Disconnect the mechanical

switch lead (CS1) which isconnected to the startcapacitor and reconnect thislead to SINPAC Switchterminal three (3).



4. Join SINPAC Switch terminalfour (4) with the lead off thestart winding, start capacitorand run capacitor. (Labeledin the connection diagram asCS2.)

5. Make sure the other side ofthe run capacitor isconnected to the motor leadT5 along with SINPAC Switchterminal two (2).

MOTOR LEAD WIRENUMBERING

EASY WIRING OF MOTOREQUIPPED WITH SINPAC

ELECTRONIC SWITCH

WIRING OF MOTOREQUIPPED WITH

MECHANICAL SWITCHEASY STEPS

Use on only the followingmodel series:

VR-16VR-40VR-50

CVR-802VR-352VR-50

2CVR-702CVR-90

T1, T5T4, T8P1Clockwise rotation

T1, T8T4, T5P1Counterclockwise

rotation

JoinL2L1



rotation

L2L1

Clockwiserotation


–

–

P2,T3& T5

T2,T4& T8

P1

P2,T3& T8

T2,T4& T5

P1

Clockwiserotation


T2,T3& T8

T2,T3& T5

Join

P2,T5T4P1

Lowername-plate

voltage

P2,T8T4P1Highername-plate

voltage

JoinL2L1

Clockwiserotation


–

–

T2,T4& T8

T1,T3& T5

T2,T4& T5

T1,T3& T8

Clockwiserotation


T2,T3& T5

T2,T3& T8

Join

T4,T8T1

Lowername-plate

voltage

T4,T5T1Highername-plate

voltage

L2L1

Procedure for Checking SINPAC Switches

28

1. Disconnect the SINPAC Switchfrom the motor and measure theresistance between terminals 2and 3. If the resistance is less than500K, the SINPAC Switch hasbeen shorted or damaged, andmust be replaced. If the resistanceis infinite, the switch may not bedamaged.

CAUTION: Do not use megger totest motor circuit with SINPACSwitch. Proceed to Step 3 if youhave a PV switch.

2. If resistance across SINPACterminal 2 and 3 is greater than500K and you have a capacitorstart, instant reverse, or capacitorstart/capacitor run SINPAC Switch,use Diagram 1.

115 V SINPAC Switch – 115 Vincandescent light (L) (at least 25watts) and 115 Vac power source.

230 V SINPAC Switch – 230 Vincandescent light (L) or two 115 Vincandescent light (L) (at least 25watts) in series and 230 Vac powersource.

a) Connect one line of AC powerto terminal 1 through a lineswitch.

b) Connect incandescent light (L)between terminals 1 and 3 ofSINPAC Switch.

c) Jumper terminals 1 and 4 ofSINPAC Switch.

d) Connect other line of AC powerto terminal 2 of SINPAC Switch.

Note 1: Apply rated AC voltage tothe SINPAC Switch.

Note 2: The incandescent light (L)will illuminate if the SINPAC Switchis operable.

Note 3: If the incandescent light(L) fails to illuminate, the SINPACSwitch has been damaged andmust be replaced.

Note 4: Turn off voltage anddisconnect the SINPAC Switch.

3. If resistance across SINPACterminal 2 and 3 is greater than500K and you have a split phaseSINPAC Switch, use Diagram 2.

a) Connect one line of AC powerto terminal 1 through a lineswitch.

b) Connect a (25 watt)incandescent light (L) betweenterminals 1 and 3 of SINPACSwitch.

c) Connect other line of AC powerto terminal 2 of SINPAC Switch.

Note 1: Apply rated AC voltage tothe SINPAC Switch.

Note 2: If the incandescent light(L) begins to blink after 1/2second, the SINPAC Switch isoperable.

Note 3: If the incandescent light(L) fails to illuminate or staysilluminated, the SINPAC Switchhas been damaged and must bereplaced. Both test must beperformed and passed to indicatea minimally good switch.

Note 4: Turn off power anddisconnect the SINPAC Switch.

Diagram 1

Diagram 2

S-795-15 29

Install SINPAC instant reverse switch.Ensure that instant reverse SINPACSwitch was installed to replace anymechanical instant reversing switch.

Wrong switch installed. CV or VRSeries installed instead of instantreverse SINPAC Switch.

Instant reverse motor,upon rapid reverse, willnot reverse direction.

If a single start capacitor was originallyinstalled, replace with two start capacitorsof twice the capacitance valve and samevoltage rating as the original andconnected in series.

Connect a 15,000 ohm, 2 watt bleederresistor across the start capacitor(s).

De-energize motor and check startcapacitor and SINPAC Switch.

High cycle rate. Excessive motortemperature.

Premature start capacitorfailures.

Replace switch.See Procedure to check SINPACSwitch. Also check start capacitor(Page 28).

Switch failure.

Replace start capacitor and SINPACSwitch as appropriate.

De-energize motor and check capacitorand SINPAC Switch.

Start capacitor failure on capacitorstart or cap. start/cap. run motors.

Motor worked properly formany cycles of operations(days, weeks, months,years), then failed.

Install correct switch.Consult selection chart.Wrong switch installed. (PV Seriesswitch on capacitor start motor.)

Upon overload, thestart winding is notreenergized (no cut in)

Change mounting location of switch.SINPAC Switches can be remotelymounted.

Check the operating ambienttemperature of SINPAC Switch. Itshould be less than 80°C (185°F).

SINPAC Switch exposed toexcessive temperature.

Replace SINPAC Switch after checkingall of above possible causes.

See Procedure to check SINPACSwitch (Page 28).

Damaged SINPAC Switch.

Correct wiring.De-energize and check the connectiondiagram. Be sure that terminal 4 ofswitch is connected to the junction ofthe start capacitor and start winding(Pages 24-27).

Incorrect connection of SINPACSwitch for capacitor start motors.

Reduce load. Replace the motor with anappropriately larger sized motor.

Check the load and motorcharacteristics.

Mismatch of motor and load. Motorcannot reach cut out speed.

Rewind motor.De-energize and check the startwinding.

Start winding damaged.

Increase the AC line voltage.Measure the AC line voltage acrossthe motor terminals.

AC line voltage too low.

Select proper SINPAC Switch.Perform SINPAC Switch SelectionProcedure as described on Page 28.

Start winding induced voltage is toolow when motor reaches desired cutout speed. The voltage is due to thelow winding-ratio of certain old stylemotors, foreign motors, convertedmotors, and special motor designs.

Replace capacitor.De-energize motor, discharge andcheck the capacitor.

Start capacitor shorted.

Change switch —Check SINPAC Switch for damage andreplace with correct switch.

Consult selection chart — Measure voltage across wiresconnected to terminals 1 and 2.

Wrong series SINPAC Switchinstalled — 115 V SINPAC Switchconnected to 230 V start winding.

Replace SINPAC Switch, if damaged.Remove switch and check the currentof the start winding. See Procedure tocheck SINPAC Switch (Page 28).

Current in the start winding isabove rating of SINPAC Switch.

Motor starts, but switchfails to cut out when cutout speed is reached.

Ground metal case.Check continuity between SINPACSwitch metal case and ground.

SINPAC Switch, if it has a metalenclosure, is not grounded.

Replace SINPAC Switch after checkingall of the above possible causes

See Procedure to check SINPACSwitch (Page 28)

SINPAC Switch damaged(open circuit).

Replace switch and hipot motor, withinstalled SINPAC Switch, by tying all motorand SINPAC Switch leads together.

See Procedure to check SINPACSwitch (Page 28)

Motor hipot tested with switchinstalled without motor andSINPAC Switch leads tied together.

Check the start winding. Motor may haveto be rewound. Infinite resistance wouldshow an open winding or looseconnection.

De-energize and disconnect. Measurethe resistance of the start winding.

Start winding open.

Replace fuses as required and apply ACline voltage.

De-energize, check AC line fuses.Check wiring and connection diagram.

No line voltage.

Increase voltage.Measure line voltage at the motorterminals.

AC line voltage too low.

Remove obstruction.Check for jam or obstruction.Motor not free to rotate.

Wait until cool down. Check/replacethermal overload. Correct motor andSINPAC Switch wiring.

Check thermal overload. Check motorand SINPAC Switch wiring.

Thermal overload opened.

Replace capacitor.De-energize motor, discharge, andcheck capacitor.

Start capacitor open or shorted.

Reconnect properly.De-energize. Check the wiring andconnection diagram.

Incorrect connection of SINPACSwitch.

Motor fails to start.Corrective ActionProcedure for CheckingPossible CauseSymptom

Troubleshooting Guide

Contents · 2017. 6. 22. · capacitor start, 16 amp switch with 165 volt cut out, catalog number would be CV-16-165 as follows: SINPAC Electronic Switch Catalog Numbering System

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