May 1985 ● Supersedes 9/77Printed in USA

Oil Switches

Type VR, VLR, VCR, VRVInstallation Instructions

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S260-20-6Service Information

Figure 1.Cooper Power Systems electrically controlled, three-phase oil switches.

These instructions do not claim to cover all details or variations in the equipment, procedure, or process described, nor to providedirections for meeting every contingency during installation, operation, or maintenance. When additional information is desired tosatisfy a problem not covered sufficiently for the user’s purpose, please contact your Cooper Power Systems sales engineer.

TYPE VR, VCRVLR

14.4 KV

TYPE VRV34.5 KV

SHIPMENT AND ACCEPTANCEEach switch is completely assembled,inspected, adjusted, and tested at thefactory, and is filled to the correct levelwith insulating oil. It is in good conditionwhen accepted by the carrier for ship-ment.

Upon receipt, inspect the switch thor-oughly for damage and loss of parts oroil incurred during shipment. If damageor loss is discovered, file a claim withthe carrier immediately. Save the ship-ping carton or crate, with all packing,for inspection.

Check for oil leakage and tighten allbolts that may have loosened duringshipment, especially the bolts attachingthe head to the tank.

HANDLING AND STORAGEIf the switch is stored for any apprecia-ble time before installation, provide aclean, dry storage area located to mini-mize the possibility of mechanical dam-age (especially to the bushings).

DESCRIPTlONType VR, VCR, and VLR (14.4-kv appli-cations) and VRV (34.5-kv applications)motor-operated oil switches provideconvenient three-phase load switchingby remote control on command or auto-matically through the use of current,voltage, or time-sensitive devices.

Type VR, VCR, and VLR switches aredifferentiated from each other by theircontact structures. Type VR switcheshave two sets of arcing and load-carry-ing contacts per phase.

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Figure 2.Short-time current ratings—Type VR, VCR, and VLR oil switches.

Electrical Ratings

Load Switching Ratings Actuator Operating Data

Short-Time Current Ratings

Type VCR contacts are similar to theType VR with the addition of dampingresistors in series with the arcing con-tacts. The resistors damp both the mag-nitude and frequency of transient inrushcurrents to values within the short-timeratings of the switch.

The Type VLR switch utilizes twobayonet-type moving contacts perphase operating within self-blast inter-rupters. This same type of contactstructure is also used in the Type VRVswitch with increased arc gaps for 34.5-kv service.

The motor-operated actuator enablesthe switch to be remotely controlled witha manually operated SPDT switch or byautomatic current, voltage, or time-sen-sitive devices. A six-pin plug and recep-tacle are furnished for connecting thecontrol circuits to the switch. Other stan-dard equipment includes a contact-posi-tion indicator, an operations counter,manual trip ring, and provision for man-ual closing.

Accessories include a quick-closefeature, a manual-trip-and-block switch,a four stage auxiliary switch, an opera-tor-cabinet heater, and low-voltagesurge arresters for the externally con-

RATINGS

TypeDescription VR Type

VCR, VLR VRV

Rated maximum voltage(kv rms) 15.5 38.0Nominal system voltage(kv rms) 2.4-14.4 34.5Rated impulse withstandvoltage (BIL) (kv crest) 110 15060-Hz insulation levelwith-stand (kv rms)

Dry, 1 minute 50 70Wet, 10 seconds 45 60

Rated continuous current(amps) 400 400

TypeDescription VR Type

VCR,VLR VRV

Rated momentary asym-metrical current (amps) 20,000 15,000Rated 1/2-second asym-metrical current (amps) 13,500Rated 1-second sym-metricai current (amps) 10,000 10,000Rated 10-second sym-metrical current (amps) _ 3,500Rated asymmetricalmaking current 20,000 15,000

Power RatedType Application Factor Current

(%) (amp)

Capacitivecurrent _ 300switching

@ @7.2 kv 14.4 kv

Inductive 75-100 400 200VR load 50-75 200 100

switching 10-50 100 50Capacitive

VCR current _ 400switching*Inductive

VLR load 10-100 400switchingInductive

VRV load 70 400switching

*Rated for parallel bank applications.

Description Ratings

Closing motor nominal operatingvoltage (vac) 120Closing motor inrush current(amps) 6Closing motor steady-state current(amps) 4Closing motor running time (see) 10Trip coil current at 115 vac (amps) 5

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Figure 3.Outline dimensions for Type VR, VCR, and VLR oil switches.

Figure 4.Outline dimensions for Type VRV oil switch.

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Figure 5.Stand actuator.

Figure 6.Stand actuator control circuit and customer connections—main switchcontacts open (accessories shown in dotted lines).

DESCRIPTlON OFSWITCH OPERATIONStandard ActuatorThese switches are equipped with amotor-operated actuator mechanism(Figure 5) for remote closing. Remotetripping is initiated by energizing a trip-open solenoid which unlatches thespring-loaded operating mechanism toopen the main switch contacts.

Subsequent closing is accomplishedby operating the motor which Ioads theopening springs, latches the operatingmechanism, and extends the closingspring until it over-toggles and closesthe main switch contacts. Operatingtime of the closing circuit is approxi-mately 10 seconds.

A selector switch provides an orderlytransition from trip to close and fromclose to trip. The selector switch isoperated from the main shaft that drivesthe main switch contacts open orclosed. When the main contacts areclosed, the trip circuit is closed and theclose circuit is open. When the maincontacts are open, the trip circuit isopen and the close circuit is closed.The standard control circuit diagram isshown in Figure 6.

Quick-Close ActuatorWhen equipped with the quick-closeaccessory (Figure 7), the main switchcontacts close in 2.5 to 5 cycles afterenergizing the closing circuit (comparedto 10 seconds for the standard control).However, at least 10 seconds mustelapse between an opening and closingoperation to allow the motor operator topreload the closing springs.

The accessory includes a solenoidop-erated latch to trip the pre-loaded clos-ing mechanism and a cam-operatedcutout switch to allow pre-loading of theclosing mechanism.

Figure 8 shows the control circuit withthe quick-close accessory with the maincontacts open. A close signal energizesthe quick-close coil, closing the mainswitch contacts. The selector switch isoperated to the left, interrupting the cur-rent to the quick-close coil.

An open operation energizes the tripcoil, opening the main switch contacts.The selector switch operates to theright, and the cutout switch operates tothe left, energizing the motor. The motoroperates to preload the closing spring.At the completion of this operation thecam operates the cutout switch to theright and the circuit is prepared foranother quick-close signal.

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Figure 7.Quick-close actuator.

Figure 8.Quick-close control circuit and customer connections (main switch con-tacts open).

INSTALLATlONPreliminary ChecksMake sure the oil in the tank is at theproper level by checking the vented dip-stick in the head casting. Replenish anyloss with new, dry transformer oil.

If the switch has been stored for anylength of time or is being relocated,check the dielectric strength of the oil inaccordance with ASTM-approved test-ing procedures. Physical properties ofthe oil used in Cooper Power Systemsdistribution switchgear is found in Ref-erence Data Publication R280-90-1.1. In new equipment the oil must have

a minimum dielectric strength of 26kv. If less then 26 kv, filter the oil torestore its dielectric strength to anacceptable level.

2. If the equipment has been in serviceand is being relocated, the minimumdielectric strength of the oil must beat least 22 kv. If less than 22 kv, or ifthe oil is contaminated with carbonsludge, replace the oil.

Lifting a SwitchFollow all approved safety practices when makinghitches and lifting the equipment. Lift the loadsmoothly and do not allow the load to shift.

This switch has two lifting lugs—both must beused when lifting. Maximum strength is attainedwith a vertical lift attached to the Iugs. Use aspreader bar with afixed attachment point for thehook at the load center.

If a sling is used for lifting the switch, it musthave a fixed attachment point at the load center.Rig the switch so that the sling height is equalto—or greater than—the distance between liftinglugs.

Mounting HardwareMounting hardware and essentialdimensional information are shown inFigures 9 through 11 for Type VR, VCR,and VLR switches and Figure 12 for theType VRV switch.

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Figure 9.Mounting dimensions of Type VR, VCR, and VLRoil switches in KA19H3 double crossarm bracketor substation hanger.

Figure 10.Mounting dimensions of Type VR, VCR and VLR oilswitches in KA19H3 broad-side-mounting poleframe.

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Figure 11.Mounting dimensions of Type VR, VCR, and VLR oil switches in KA194VR substation frame with KA584 R2 windlass.

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Figure 12.Mounting dimensions of Type VRV oil switch in KA146W3 pole-mounted suspension hanger.

Figure 13.Location of wiring receptacles in bottom of operator cabinet.

Figure 14.Control-circuit plug.

CONNECTIONSMain WiringPrimary connections to the VR, VCR,and VLR switches are made at the uni-versal clamp-type bushing terminalsthat accommodate either copper or alu-minum conductors from No. 6 solid to350 MCM stranded in a vertical or ahorizontal position. The Type VRVswitch bushing terminals will accommo-date No. 2 solid through 350 MCMstranded conductors.

Control and Accessory WiringControl wiring and wiring for variousaccessories is brought to receptacles inthe bottom of the operator cabinet. Thereceptacles are located in Figure 13.

STANDARD SWITCHThe control circuit is permanently wiredto a six-pin receptacle in the bottom ofthe operator housing. The mating plug isfurnished as standard with the switch.

Internal connections to the receptacleand customer connections to the plugare shown in Figure 6 for the standardcontrol circuit and in Figure 8 for thequick-close control circuit. Pin arrange-ment for the mating plug is shown in Figure 14.

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Figure 15.Connection diagram—standard operator wired for use with Type S autoload-transfer control.

Figure 17.Eight-pin fault-block accessorycable plug.

Figure 16.Connection diagram—quick-close operator wired for use with Type S autoload-transfer control.

OPERATING INSTRUCTlONS Standard OperatorELECTRICAL OPERATIONThe switch is shipped from the factoryin the open position. To close the switchelectrically, make the connections asshown in Figure 6 and operate theSPDT switching device to its CLOSEposition. The motor will operate andclose the main contacts in approximate-ly 10 seconds. To open the switch elec-trically, operate the SPDT device to theOPEN position. The trip solenoid willoperate immediately to open the mainswitch contacts.

An SPDT switching device (furnishedby the customer) is required to operatethe switch. With the standard operator,the switching device must hold in theCLOSE position for at least 10 secondsto allow the motor to drive the mainswitch contacts closed. The OPEN sig-nal may be momentary (at least 5cycles).

With the quick-close operator, boththe CLOSE and OPEN signals may bemomentary. However, at least 10 sec-onds must elapse between an OPENand a CLOSE signal to allow the motorto preload the close spring.

LOAD-TRANSFER SWITCHFor application in automatic load-transfer schemes with the Type S con-trol, the following accessories whichmodify these switches are available:

Type S Control with Fault BlockFor this application, the modificationincludes internal bushing current trans-formers for fault sensing, an additionalmicroswitch and the necessary circuitmodifications all wired to a six-pin andan eight-pin receptacle as shown inFigure 15 for the standard operator andFigure 16 for the quick-close operator.Pin orientation for the six-and eight-pinmating plugs is shown in Figures 14and 17.

Type S Control without FaultBlockFor this application the modificationincludes the necessary circuit modifica-tions wired to the six-pin receptacle asshown in Figures 15 and 16. Pin orien-tation for the six-pin mating plug is

No. of Switch Switch Contact Receptacle Wire MarkerStages Terminal Type Pin Color Code

1 b A None2 B Green3 a C Red4 D Rear None Short5 b E Receptacle Orange Tabs6 F Lt. Blue7 a G Dk. Blue8 H Yellow9 b A Black10 B Green11 a C Red12 D Front White Long13 b E Receptacle Orange Tabs14 F Lt. Blue15 a G Dk. Blue

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Figure 18.Manual operation of actuatormechanism.

Figure 19.Four-stage auxiliary switchinstalled in operator cabinet.

When Sectionalizer Closed Open

Auxiliary a Contacts Are Closed OpenAuxiliary b Contacts Are Open Closed

MANUAL OPERATIONTo close the switch manually, attach thehandcrank (held by a clip in the bottomof the operator cabinet) to thecrankshaft as shown in Figure 18 andcrank the mechanism clockwise untilthe closing spring overtoggles andcloses the main switch contacts. Toopen the switch manually, pull downthe red pullring located underneath theoperator cabinet.

Switch positions can be changedfrom a or b operation by repositioningthe cams inside each switch section. Tochange any cam position:1. Remove the auxiliary switch cover.2. Detach the switch from the switch link

by removing the groove pin and C-rings (see Figure 19).

QUICK-CLOSE OPERATOR Electrical OperationWhen shipped from the factory, theswitch is operated to the contacts-openposition, but the motor is deenergizedbefore it operates to load the closingspring. Before any electrical operationcan be performed the motor must beenergized to complete its operatingcycle and load the closing springs.Apply source voltage across pins A andB of the control receptacle, or acrossterminals 1 and G of the terminal board;the motor will stop when it completes itscycle.

To close the switch electricalIy, makethe connections as shown in Figure 8and operate the SPDT switching deviceto its CLOSE position. The quick-closesolenoid will operate immediately andclose the main switch contacts. To openthe switch electrically, operate theSPDT device to the OPEN position. Thetrip soleoid will operate immediately toopen the main switch contacts and themotorwill operate to preload the closingspring for the next operating cycle.

MANUAL OPERATIONTo close the switch manually, attach thehandcrank (held by a clip in the bottomof the operator cabinet) to thecrankshaft as shown in Figure 18 andcrank the mechanism clockwise until

the closing spring cam hits its mechani-cal stop. Remove the crank andmechanicalIy operate the quick-closesolenoid to close the main switch con-tacts. To open the switch manually, pulldown the red pullring located under-neath the operator cabinet.

ACCESSORIESAuxiliary SwitchThe auxiliary switch is mounted to thetop of the operator cabinet in a weath-erproof housing (Figure 22) and is usedfor relaying or interlocking schemesand for remote contact indication. Fig-ure 20 shows the auxiliary-switchmounting with covers removed.

A four-stage switch can be provided.Each stage consists of two independentcontact assemblies with either a (nor-mally open) or b (normally closed) con-tacts which can be easily changed inthe field. A data plate attached to theswitch cover shows the switch arrange-ment. Related switch contact positionsare shown in Table 1.

Table 1Related Switch Contact Positions

Table 3Interrupting Ratings—Switch Contacts

Table 2Auxiliary-Switch-Receptacle Connections

The switch is permanently wired totwo 8-pin receptacles in the bottom ofthe operator cabinet (Figure 13). Theswitch terminal-receptacle pin connec-tions are shown in Table 2. The pinarrangement of the mating plugs isshown in Figure 20. The mating plugsare furnished with the accessory.

The switch contacts are insulated for600 volts and have a continuous cur-rent rating of 10 amps. Their interrupt-ing ratings are shown in Table 3.

Induc- Non- Induc- - NonVolts tive inductive tive inductive

ac ac dc dc(amps) (amps) (amps) (amps)

24 _ _ 15. 20.48 _ _ 7.5 10.

125 60 80 1.5 2.240 30 60 _ _250 _ _ 0.45 0.5

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3

2

1

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Figure 20.Auxiliary-switch plug.

Figure 21.Cam positions inside the auxiliary switch.

3. Remove the machine screws attach-ing the assembly to the cabinet.

4. With the switch removed, unfastenthe two hex nuts and lockwashersfrom the long machine screws thathold the switch sections together.

5. Starting with the rear switch section,lift the cams offthe operating shaft,replacing the cams in one of thepositions shown in Figure 21.

6. Reposition and fasten the switchsections together as removed andremount the switch on the sectional-izer.

KTM6/96

P.O. Box 1640Waukesha, WI 53187www.cooperpower.com

©1995 Cooper Industries, Inc.Kyle® is a registered trademark of Cooper Industries, Inc.

Printed on Recycled Paper12

Manual Trip and BlockThis accessory consists of a hookstickoperated DPDT switch in the weather-tight housing mounted to the side of theoperator cabinet (see Figure 22) andpermanently wired to the control circuitas shown in figure 23. When the

hookstick operator is pulled down theaccessory electrically operates the tripsolenoid to open the main switch con-tacts and disables the motor circuit toprevent electrical closing of the switch.

Figure 22.Manual-trip-and-block and auxiliary-switch accessories.

Figure 23.Control circuit and customer connections for manual-trip-and-block accessory (with or without quick-close).

KA2048-10

Service InformationFigure 1. Cooper Power Systems electrically controlled, three-phase oil switches.Figure 2. Short-time current ratingsÑType VR, VCR, and VLR oil switches. Electrical RatingsLoad Switching Ratings Actuator Operating DataShort-Time Current RatingsFigure 3. Outline dimensions for Type VR, VCR, and VLR oil switches.Figure 4. Outline dimensions for Type VRV oil switch.Standard ActuatorFigure 5. Stand actuator.Quick-Close ActuatorFigure 6. Stand actuator control circuit and customer connections—main switch contacts open (accessories shown in dotted lines).Preliminary ChecksFigure 7. Quick-close actuator.Figure 8. Quick-close control circuit and customer connections (main switch con- tacts open).Figure 9. Figure 10. Mounting dimensions of Type VR, VCR, and VLR Mounting dimensions of Type VR, VCR and VLR oil oil switches in KA19H3 double crossarm bracket switches in KA19H3 broad-side-mounting pole or substation hanger. frame.Figure 11. Mounting dimensions of Type VR, VCR, and VLR oil switches in KA194VR substation frame with KA584 R2 windlass.Figure 12. Mounting dimensions of Type VRV oil switch in KA146W3 pole-mounted suspension hanger.Main WiringFigure 13. Control and Accessory Wiring Location of wiring receptacles in bottom of operator cabinet.STANDARD SWITCHFigure 14. Control-circuit plug.LOAD-TRANSFER SWITCHType S Control with Fault BlockFigure 15. Connection diagramÑstandard operator wired for use with Type S auto load-transfer control.Type S Control without Fault BlockFigure 17. Eight-pin fault-block accessory cable plug.ELECTRICALOPERATIONFigure 16. Connection diagramÑquick-close operator wired for use with Type S auto load-transfer control.Table 1 Related Switch Contact Positions Figure 18. Manual operation of actuator mechanism.Figure 19. Four-stage auxiliary switch installed in operator cabinet.Table 2 Auxiliary-Switch-Receptacle ConnectionsFigure 20. Auxiliary-switch plug.Figure 21. Cam positions inside the auxiliary switch.Manual Trip and BlockFigure 23. Figure 22. Control circuit and customer connections for manual- Manual-trip-and-block and auxiliary-switch accessories. trip-and-block accessory (with or without quick-close).KA2048-10