1ReclosersService Information

Printed in USA1February 2003 Supersedes 3/02

S280-90-5Slip-On Bushing CT Kits KA712L1S,KA712L2S, KA712L3S, and KA712L5SInstallation Instructions and Technical Data

Safety Information ..................................................... 2Hazard Statement Definitions ................................ 2Safety Instructions .................................................. 2

Product Information .................................................. 3Introduction ............................................................ 3Acceptance and Initial Inspection .......................... 3Handling and Storage ............................................ 3ANSI Standards ..................................................... 3

Quality Standards ................................................... 3Description ............................................................. 3

Installation Procedure .............................................. 4Connections ........................................................... 4

Dimensions ................................................................ 5Electrical Data and Characteristics ......................... 5

Correction Curves .................................................. 6CT Excitation Curves ............................................. 8

Contents

Catalog Single-PhaseNumber Kit Description Reclosers Three-Phase Reclosers*** Sectionalizers SwitchesKA712L1S Multi-ratio (450:5 ratio) E, 4E, L, 3H, 6H, V6H GN3, GV*, TSC, VRV

Slip-on Bushing CT V4L, V4E, VXE GN3E, GN3VEKA712L2S Multi-ratio (600:5 ratio) DV R**, RE, RX, RXE, RV, RVE,(see note) Slip-on Bushing CT W, WE, WV27, WV38X, WVE27, GW, GWC F

WVE38X, VW, VWE, VWV27,VWV38X, VWVE27, VWVE38X

KA712L3S Multi-ratio (600:5 ratio) D Slip-on Bushing CT

KA712L5S Multi-ratio (600:5 ratio) VXE Slip-on Bushing CT

TABLE 2Kit Description and Application

* Not applicable above Serial No. 1000.** Not applicable below Serial No. 3733.*** Installing this kit on all three phases of a three-phase recloser requires three kits (one kit for each phase).

Part Description KA712L1S KA712L2S KA712L3S KA712L5SCurrent transformer assembly (CT) 1 1 1 1Cover assembly / nameplate 1 1 1 1Clamp 3 3 3 1 short, 2 longWasher 3 3 3 3Eyebolt 1 1 1Palnut 1 1 1

TABLE 1Kit Parts

Figure 1. Figure 2.Multi-Ratio, Slip-On CT kit. CT properly installed on bushing.

020069KM 020070KM

Note: If desired, connectset of 3 BCTs for kitKA712L2S withwiring kit KA895R7.Contact your CooperPower Systems rep-resentative for addi-tional information.

Slip-On Bushing CT Kits KA712L1S, KA712L2S, KA712L3S, and KA712L5S Install. Instr. and Technical Data

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The instructions in this manual are not intended as a sub-stitute for proper training or adequate experience in thesafe operation of the equipment described. Only compe-tent technicians who are familiar with this equipmentshould install, operate, and service it.A competent technician has these qualifications:

Is thoroughly familiar with these instructions. Is trained in industry-accepted high- and low-voltage

safe operating practices and procedures. Is trained and authorized to energize, de-energize,

clear, and ground power distribution equipment. Is trained in the care and use of protective equipment

such as flash clothing, safety glasses, face shield,hard hat, rubber gloves, hotstick, etc.

Following is important safety information. For safe instal-lation and operation of this equipment, be sure to readand understand all cautions and warnings.

Safety InstructionsFollowing are general caution and warning statementsthat apply to this equipment. Additional statements, relat-ed to specific tasks and procedures, are located through-out the manual.

SAFETY INFORMATION

WARNING: This equipment is not intended toprotect human life. Follow all locally approved pro-

cedures and safety practices when installing or operat-ing this equipment. Failure to comply can result indeath, severe personal injury, and equipment damage.

G102.1

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DANGER: Hazardous voltage. Contact withhazardous voltage will cause death or severe

personal injury. Follow all locally approved safety pro-cedures when working around high and low voltagelines and equipment. G103.3

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WARNING: Before installing, operating, main-taining, or testing this equipment, carefully read

and understand the contents of this manual. Improperoperation, handling or maintenance can result in death,severe personal injury, and equipment damage. G101.0

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WARNING: Power distribution equipment mustbe properly selected for the intended application.

It must be installed and serviced by competent person-nel who have been trained and understand proper safe-ty procedures. These instructions are written for suchpersonnel and are not a substitute for adequate trainingand experience in safety procedures. Failure to proper-ly select, install, or maintain power distribution equip-ment can result in death, severe personal injury, andequipment damage. G122.2

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SAFETY FOR LIFECooper Power Systems products meet or exceed all applicable industry standards relating to product safety. We activelypromote safe practices in the use and maintenance of our products through our service literature, instructional trainingprograms, and the continuous efforts of all Cooper Power Systems employees involved in product design, manufacture,marketing, and service.We strongly urge that you always follow all locally approved safety procedures and safety instructions when workingaround high voltage lines and equipment and support our Safety For Life mission.

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This manual may contain four types of hazardstatements:

DANGER: Indicates an imminently haz-ardous situation which, if not avoided, will

result in death or serious injury.

WARNING: Indicates a potentially hazardoussituation which, if not avoided, could result in

death or serious injury.

CAUTION: Indicates a potentially hazardoussituation which, if not avoided, may result in

minor or moderate injury.

CAUTION: Indicates a potentially hazardous situ-ation which, if not avoided, may result in equip-ment damage only.

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Hazard Statement Definitions

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IntroductionService Information S280-90-5 provides installationinstructions and technical data for the Kyle KA712L1S,KA712L2S, KA712L3S, and KA712L5S Slip-OnBushing CT kits.Note: Users intending to install the Slip-On Bushing CT kit

on all three phases of a three-phase recloser mustorder three kits (one kit per phase).

Note: If desired, connect set of 3 BCTs for kit KA712L2S withwiring kit KA895R7. Contact your Cooper PowerSystems representative for additional information.

Read This Manual FirstRead and understand the contents of this manual andfollow all locally approved procedures and safety prac-tices before installing or operating this equipment.

Additional InformationThese instructions cannot cover all details or variations inthe equipment, procedures, or process described, norprovide directions for meeting every possible contin-gency during installation, operation, or maintenance. Foradditional information, contact your Cooper PowerSystems representative.In addition to this manual, also refer to the appropriateservice manual for the model being equipped with the kit.

Acceptance and InitialInspectionEach Slip-On Bushing CT kit is in good condition at thefactory and when accepted by the carrier for shipment.Upon receipt, inspect the carton for signs of damage.Unpack the kit(s) and inspect it thoroughly for damageincurred during shipment. If damage is discovered, file aclaim with the carrier immediately.

Handling and StorageBe careful during handling and storage of the kit to mini-mize the possibility of damage. If the kit is to be stored forany length of time prior to installation, provide a clean,dry storage area.

ANSI StandardsKyle reclosers are designed and tested in accordancewith ANSI standards C37.60 and C37.85 and ANSIguideline C37.61.

Quality StandardsThe Quality System at the Cooper Power Systems, KyleDistribution Switchgear plant is certified to the ISO 9001standard.

DescriptionThe slip-on, multi-ratio bushing current transformers areespecially designed for use with numerous Kyle single-and three-phase distribution switchgear for load meteringat the equipment location. The CT is available only as akit for field installation. The kit consists of the epoxy-encapsulated, current-transformer assembly, coverassembly / nameplate, three clamps and washers forattaching the CT to the bushing clamping bolts of theswitchgear unit, and an eyebolt lifting lug with a palnut, ifapplicable (Figure 1 and Table 1). An eyebolt and palnutare supplied with kits KA712L1S, KA712L3S, andKA712L5S for replacement of the standard fabricated lift-ing lug, to allow additional clearance for the CT on thehead.Refer to Table 2 for the appropriate application of eachkit.

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PRODUCT INFORMATION

Product ServiceType Model InformationSingle-Phase E, 4E, L S280-10-8Reclosers D, DV S280-20-1

VXE S280-16-1V4L, V4E S280-10-8

Three-Phase 3H S280-10-4Reclosers 6H, V6H S280-10-14

R S280-30-2RE S280-40-3RX S280-30-8RXE S280-40-7RV S280-30-4RV Serial No. 4111 and after S280-30-9RVE S280-40-5W, WV27, WV38X VW,VWV27, VWV38X S280-30-1WE, WVE27, WVE38X,VWE, VWVE27, VWVE38X S280-40-2

Sectionalizers GN3 S270-10-8GN3E, GN3VE S270-15-1GV Serial No. 1302 and above S270-20-2GV Serial No. 2265 and above S270-20-3GW S270-20-3GWC S270-21-1

Switches F S260-50-1TSC S260-20-10VRV S260-20-6

Refer to the appropriate service information instructionmanual for the step-by-step procedures to remove therecloser from service. Refer to the ProductInformation section of this manual for specific servicemanual information.

To begin the installation process:1. Bypass, trip, and de-energize the recloser.2. Disconnect the lead wires from the bushings.3. Carefully transport the unit to a suitable service facility.

Note: If the recloser is equipped with extra-creepagebushings, it may be necessary to remove the bush-ings when installing the "slip-on" bushing CT. Thismay require the tank to be dropped.

4. For kit KA712L2, skip Step 4. Continue with Step 5.This step is only applicable to kits KA712L1,KA712L3, and KA712L5:

Remove the fabricated lifting lug from the headand substitute the eyebolt lug, locking it in position with the palnut.

5. Slip the CT over the top of the bushing and position itat the base of the bushing with the black dot polaritymark facing upward and the terminal box positionedoutboard.

6. Loosen the three bushing clamping bolts and attachthe CT by slipping the slotted end of the clamp underthe lockwasher while clipping the other end to the CT(Figure 3). Position the clamp so the top surface of theCT is at the level of the bushing clamps in order tomaintain the BIL rating of the switch gear unit.

For kit KA712L5, position the shorter clamp closest tothe eyebolt lifting lug and position the two longerclamps towards the outside of the head casting.Note: Make sure the insulation coating on the CT end of

the clamp is intact and undamaged. If bare metalon this end of the bracket touches the head, a"shorted-turn" effect is produced which affects theCT output and accuracy.

7. Retighten all three bushing clamping bolts evenly, alittle at a time. Refer to Table 3 for the appropriatebushing bolt torque specifications.

8. Snap the cover assembly over the terminal connec-tors of the CT housing. A properly installed CT kit isshown in Figure 2.

ConnectionsConnections to the CT are made in the junction box.Terminal connections for the various ratios are shown onthe inside of the junction-box cover. The junction box has7/8-in. diameter holes at either end which will accommo-date standard 1/2-in. conduit fittings or Pyle-National, DSseries cable-sealing grips (if rubber covered cable isused for the meter leads).

Slip-On Bushing CT Kits KA712L1S, KA712L2S, KA712L3S, and KA712L5S Install. Instr. and Technical Data

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Figure 3.Mounting clamp is clipped to CT assembly andattached under bushing clamping bolt.

INSTALLATION PROCEDURE

CAUTION: Equipment Damage. Do not attemptto mount the bushing CT by drilling or tapping into

the CT ring assembly. Perforation of the CT ring candamage the internal windings and cause ingress ofmoisture. Failure to comply can result in equipmentdamage and misoperation. T298.0

IMPORTANT: Remove the recloser from service andtransport it to a clean suitably equipped service centerprior to installing the kit.

CAUTION: Equipment damage. Refer to thespecific switchgear unit maintenance manual for

tanking/untanking procedures and related instructions.Failure to follow these instructions could result inequipment damage or personal injury. T238.0

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WARNING: Hazardous voltage. De-energizethe switchgear before installing this kit. Follow all

locally approved safety practices and procedures whenworking around high voltage lines and equipment.Failure to comply can result in contact with high voltage,which will cause death or severe personal injury. T232.3

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CAUTION: Follow all locally approved safetypractices when lifting and mounting the equip-

ment. Use the tapped lifting provisions provided. Liftthe load smoothly and do not allow the load to shift.Improper lifting can result in equipment damage. G126.0

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IMPORTANT: Do not remove the shorting lead acrossCT terminals until external connections are made.

DIMENSIONS ELECTRICAL DATA ANDCHARACTERISTICS

The current transformers have four taps to provide thefollowing ratios within a 5% accuracy for conventionalmetering.

Multi-Ratio 450:5Catalog Number: KA712L1S

Multi-Ratio 600:5Catalog Numbers: KA712L2S, KA712L3S,and KA712L5S

All CTs can carry 150% of rated secondary currentcontinuously.Note: Physical construction requires an irregular turns ratio

for some windings to provide 5% accuracy at allratios.

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Multi-Ratio Multi-RatioDimension 450:5 600:5

A 6 15/16 7 3/4B 4 3/4 5 1/2C 4 7/8 5 9/32D 5 5/8 6 1/16E 9 1/8 9 15/16

Bushing BoltsApplied Torque

Model Ft. - Lbs.3H 6-10

GN3E, GN3, GN3VE, 6H, V6H 6-10GV 6-10

L, E, 4E, V4L, 6-10V4E, VXE-15, VXE-27

VWE, VWVE27, VWVE38X, R, 10-15RE, RX, RXE, WV27, WV38X

GWC, GW, RV, RVE,W, WE, WVE27, WVE38X,

VRV, VW, VWV27, VWV38X

TABLE 3Bushing Bolt Torque Specifications

Correction CurvesIf accuracies greater than the nominal 5% are desired,typical correction curves for the CTs at all ratios areshown in Figures 4 and 5. The correction curves aredrawn for three different transformer burdens:Curve 1: 0.4-ohm impedanceCurve 2: 0.21-ohm impedanceCurve 3: 0.1-ohm impedanceThe 0.21-ohm burden represents the impedance of aSangamo Type ADS meter with a 5-amp scale andinstantaneous elements. The 0.4-ohm burden represents

the impedance of this same meter with a total of 40 feetof No. 16 AWG conductor leads (meter 20 feet from CT).The 0.1-ohm burden curves are included to allow forinterpolation for other meter loads.

How to Use the Correction CurvesAssume a total burden of 0.4-ohms (Curve 1) with themeter connected to KA712L1S for a 100:5 amp ratio, andreading 3 amps. From the appropriate curve the correc-tion factor is 1.024; the corrected secondary current is3/0 x 1.024 = 3.072 amps; and the actual primary currentis 3.072 x 100/5 = 61.4 amps.

Slip-On Bushing CT Kits KA712L1S, KA712L2S, KA712L3S, and KA712L5S Install. Instr. and Technical Data

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Figure 4.Correction curves for 450:5 multi-ratio bushing current transformer, Catalog No. KA712L1S.

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Figure 5.Correction curves for 600:5 multi-ratio bushing current transformer, Catalog Numbers KA712L2S, KA712L3S,and KA712L5S.

CT Excitation CurvesFor specific applications at burdens differentfrom those plotted on the correction curves,the secondary excitation curves (Figures 6and 7) can be used. These curves plot the CTsecondary voltage versus the exciting currentof the CTs for all ratios. For a given sec-ondary load the secondary voltage is theproduct of the secondary impedance and theactual secondary current. Using this voltage,the secondary exciting current can be deter-mined from the appropriate curve. The totalsecondary current is the sum of the meterreading and the exciting current. Multiplyingthis total secondary current by the actualturns ratio of the CT winding will give theactual primary current.

How to Use the ExcitationCurvesUsing the same assumptions as in the exam-ple for the correction curves; namely CTKA712L1S, 100:5-amp tap, 0.4-ohm burdenand 3-amp meter reading, the secondaryvoltage is 3 x 0.4 = 1.2 volts. From the curve,this voltage produces an exciting current of0.41 amps, and the total secondary currentwill be 3 + 0.41 = 3.41 amps. Multiply this bythe turns, 3.41 x 18 = 61.38 the actual prima-ry current.

Slip-On Bushing CT Kits KA712L1S, KA712L2S, KA712L3S, and KA712L5S Install. Instr. and Technical Data

KA2048-187 Rev: 02

Figure 6.Typical secondary excitation curves for 450:5 Multi-ratio Slip-onBushing Current Transformer, Catalog No. KA712L1S.

Figure 7.Typical secondary excitation curves for 600:5 Multi-ratio Slip-onBushing Current Transformer, Catalog Numbers KA712L2S,KA712L3S, and KA712L5S.

2003 Cooper Industries, Inc.Kyle is a registered trademark of Cooper Industries, Inc.

Printed on Recycled Paper

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KDL2/03

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