power break® ii circuit breakers

GEH-6271 Installation Instructions

Power Break® II Circuit Breakers

Draw-Out 800-2000 Ampere Frames

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GEH-6271

WARNINGS, CAUTIONS, AND NOTESAS USED IN THIS PUBLICATION

WARNINGSWarning notices are used in this publication to emphasize that hazardous voltages,currents, or other conditions that could cause personal injury are present in thisequipment or may be associated with its use.Warning notices are also used for situations in which inattention or lack of equipmentknowledge could cause either personal injury or damage to equipment.

CAUTIONSCaution notices are used for situations in which equipment might be damaged if careis not taken.

NOTESNotes call attention to information that is especially significant to understanding andoperating the equipment.

This document is based on information available at the time of its publication. Whileefforts have been made to ensure accuracy, the information contained herein does notcover all details or variations in hardware and software, nor does it provide for everypossible contingency in connection with installation, operation, and maintenance.Features may be described herein that are not present in all hardware and softwaresystems. GE Electrical Distribution & Control assumes no obligation of notice toholders of this document with respect to changes subsequently made.GE Electrical Distribution & Control makes no representation or warranty, expressed,implied, or statutory, with respect to, and assumes no responsibility for the accuracy,completeness, sufficiency, or usefulness of the information contained herein. Nowarrantees of merchantability or fitness for purpose shall apply.

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The following are trademarks of GE Company:

Power Break®, MicroVersaTrip PM

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Power Break® // Circuit BreakersDraw-Out Breaker InstallationTable of Contents

DescriptionFeatures

Installing the BreakerRemoving the BreakerMaintenance ProceduresLubrication

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List of Figures1. Rear view of Power Break II draw-out circuit breaker2. Leftside of breaker, showing padlock accessory and racking shaft lockout plate3. Right side of breaker, showing rejection feature, draw-out position switch, draw-out

position indicator, and electric operator cutoff switch4. Lifting Bar attached to draw-out breaker for manual lifting5. Lifting Bar attached to draw-out breaker for lifting with hoist6. Breaker installed on rails, ready to be pushed into the substructure7. Wrench attached to the breaker racking shaft8. Compartment position indicator on front of breaker9. Withdrawing the substructure rails

10. Rotating the breaker forward for inspection

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List of Tables1. Catalog numbers of draw-out breakers and corresponding substructures2. Illustration of rejection-scheme logic, showing that breakers may generally be

installed in higher-rated substructures

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Power Break® II Circuit BreakersDraw-Out Breaker Installation

DescriptionTypes SSD and SHD Power Break II draw-out cir-cuit breakers are used in types SPS and SPH sub-structures, with appropriate catalog numbers listedin Table 1. Draw-out construction permits activa-tion of a new feeder, rapid replacement of a circuitbreaker, and facilitates inspection and mainte-nance of the draw-out breaker without the need forde-energizing the entire switchboard.

RollersDraw-Out Breaker SubstructureSSD08B2## SPSDOS08

ShutterActuatorSHD08B2## SPHDOS08

SSD16B2## SPSDOS16SHD16B2## SPHDOS16

PrimaryDisconnects

Draw-OutInterlock

Draw-OutMechanism

By-Pass SwitchActuatorSSD20B220 SPSDOS20

SHD20B220 SPHDOS20 Figure 1. Rear view of Power Break II draw-out circuitbreaker.Table 1. Catalog numbers of draw-out breakers and

corresponding substructures.

FeaturesThe features described below are illustrated inFigures 1, 2, and 3.Primary Disconnects. Primary power is fed throughmultiple-finger primary disconnects when thebreaker is in the connected position.Secondary Disconnects. Control power is providedthrough the secondary disconnects in the test andconnected positions only. All accessories termi-nate at dedicated positions regardless of the combi-nation of accessories installed.Rollers. The rollers on the sides of the breaker rideon retractable rails in the draw-out substructure foreasy installation and removal.Draw-Out Mechanism. A racking shaft powers a cen-trally mounted screw through a chain drive into afixed nut in the substructure. A special speedwrench is supplied with an integral V5-inchsquare-drive socket to aid in installation andremoval.

Draw-OutPadlock Accessory

Cat. No. TDOPC Racking shaftWrench Lockout

Plate

Figure 2. Left side of breaker, showing padlock accessory andracking shaft lockout plate.

Racking Shaft Wrench Lockout Plate. This interlockprevents engagement of the wrench when thebreaker contacts are closed.

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! Power Break® II Circuit BreakersDraw-Out Breaker Installation

tTable 2 illustrates the rejection scheme logic. Notethat breakers may be safely used in higher-ratedsubstructures. However, local and industry codesand standards require that conductors be sized fc>the substructure. Therefore, installing breakers insubstructures with higher ratings is possible, butnot economical.

Breaker SubstructureSSD08B202, 04, 08 -SHD08B202, 04, 08- ^SPSD08

^SPHD08

SSD16B210, 16SHD16B210, 16 *SPSD16

^SPHD16

SSD20B220SHD20B220

SPSD20SPHD20

Table 2. Illustration of rejection-scheme logic, showing thatbreakers may generally be installed in higher-rated

substructures.

Figure 3. Right side of breaker, showing rejection feature,

draw-out position switch, draw-out position indicator, andelectric operator cutoff switch.

Draxv-Out Padlock Accessory . When a padlock isinstalled, this feature works with the racking shaftlockout plate to prevent engagement of the rackingshaft wrench .Shutter Actuator. A stud actuates the optional shutteraccessory.By-Pass Sivitch Actuator . Operates the optional by-pass switch accessory.

Draw-Out Position Switch. This switch is wired backinto the breaker trip unit. MicroVersaTrip PMTrip Units can communicate the breaker position(test or connected) on the POWER LEADERCommunication Network.Draw-Out Position Indicator. Indicates whether thebreaker is in the connected, test, or disconnecttion.

Electric Operator Cutoff Switch. Prevents cycling ofthe spring-charging motor during installation orremoval of a breaker.

Draxv-Out Interlock . This feature trips a closed circuitbreaker if the wrench interlock is deliberatelydefeated. The breaker is tripped before the primarydisconnects part as the breaker is racked out andbefore the primary disconnects engage as thebreaker is racked in.Rejection Feature. This feature prevents insertion of abreaker into a substructure of lower ampere ratingor higher short-circuit rating. It does not reject abreaker with incompatible control wiring. See thelabel on the breaker or Table 1 for the proper sub-structure catalog number. (Also shown in Figure

Lifting Bar . The Lifting Bar, catalog numberposi- TJ)0LB, is available for safe handling of the draw-

out breaker, as illustrated in Figures 3 and 4.

Installing the BreakerUse the following procedure to install the draw-outbreaker into the substructure.

1. Attach the Lifting Bar, catalog numberTDOLB, by locating the hooks on the barbeneath the shoulder studs of the breaker, asillustrated in Figures 4 and 5.

2. Pull out the substructure rails until they dropinto the horizontal locked position. Lower thebreaker so that the grooves in the rollers dropover the rails.

7.)

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3. Make sure the grooves in all rollers straddlethe rails, as illustrated in Figure 6, thenremove the Lifting Bar and push the breakerinto the substructure until it stops in theDISCONNECTED position. Then lift the railsand push them in to the stored position.

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CAUTION: The breaker must be OFF before it isconnected. If the breaker is charged, press the ONbutton to close the breaker contacts, then press theOFF button to open the contacts.ATTENTION: Le disjoncteur doit etre en positionOFF avant qu’il ne soit embroche. Si le ressort defermeture du disjoncteur est charge, fermer lescontacts du disjoncteur par action sur le bouton ON,puis appuyer sur le bouton OFF pour ouvrir lescontacts.

Figure 5. Lifting Bar attached to draw-out breaker for liftingwith hoist

LiftingBar

*Je w“-ShoulderStud

Figure 4. Lifting Bar attached to draw-out breaker for manuallifting. Figure 6. Breaker installed on rails, ready to be pushed into

the substructure.

4 Engage the I/2-inch square end of the rackingshaft with the supplied wrench, catalog num-ber TDORT, and rotate the shaft clockwise fc>draw the breaker into the TEST orCONNECTED position, as illustrated in Fig-ure 7. The compartment position indicator isshown in Figure 8.

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ClNOTE: If the breaker does not fit the structure,check the rejection relationship, illustrated in Fig-ure 8, to verify that a correctly rated breaker isbeing installed. Table 1 lists the correct draw-outsubstructure for each breaker frame.

SubstructureRejectionFeature

iNOTE: Si le disjoncteur ne rentre pas dans leberceau, verifier le detrompeur illustre dans lesfigure 8, qui empeche l’insertion d’un mauvaiscalibre de disjoncteur. La Table 1 definis le berceauconvenable a chaque taille de disjoncteur.

.06 inminimumm

BreakerRejectionFeature

< # CompartmentPositionIndicator

;C

mm

Figure 8. Compartment position indicator on front of breaker.

r Removing the BreakerUse the following procedure to remove the draw-out breaker from the substructure.

CAUTION: The breaker must be OFF before it is dis-connected and removed.Racking

Tool

ATTENTION: Le disjoncteur doit etre en positionOFF avantqu’il ne soit debroche et depose.

Figure 7. Wrench attached to the breaker racking shaft.

Engage the i/2-inch square end of the rackingshaft with the supplied wrench, catalog num-ber TDORT, as illustrated in Figure 7, androtate the shaft counter-clockwise to withdrawthe breaker to the TEST or DISCONNECTEDposition. The compartment position indicatoris shown in Figure 8.

Pull the substructure rails out as far as possibleuntil they drop into the horizontal lockedposition, as illustrated in Figure 9.From the DISCONNECTED position, pull thebreaker out on the rails until the front rollersfall into the detent, as illustrated in Figure 6.

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2.

3.

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Maintenance ProceduresA regular maintenance schedule should be estab-lished to obtain the best service and reliability.Plant operating and local conditions dictate the fre-quency of inspections required.A permanent record should be kept of all mainte-nance work. It will be a valuable reference for sub-sequent maintenance work and station operation.Records should include reports of tests performed,condition of equipment, and repairs and adjust-ments.

Maintenance employees must follow all recog-nized safety practices, such as those contained inthe National Electrical Safety Code and in com-pany or other safety regulations. Solid insulationsurrounding an energized conductor in powerapparatus must never be relied upon to provide pro-tection to personnel.

Figure 9. Withdrawing the substructure rails.

4. The breaker can now be rotated about the Draw-out structure and connections should befront roller by pulling forward, as illustrated given the following overall maintenance at leastin Figure 10, for inspection of the rear of the annually. Maintenance frequency depends on thebreaker, or it can be completely removed afterattaching the Lifting Bar, as illustrated inFigures 4 and 5.

severity of service and atmospheric conditions.Equipment subject to highly repetitive operationmay require more frequent maintenance.

Whilebreaker in the tilt-out position, a complete checkcan only be made after removing the breaker fromthe rails.

of these steps can be done with thesome

WARNING: Before attempting any work on draw-out devices, ensure that all sources of power—pri-mary and secondary—have been de-energized.

AVERTISSEMENT: Avant deintervention sur des appareils debrochable, verifierque toutes les alimentations de puissance, a la foisprimaire et secondaire, sont coupees.

commencer toute

1. Thoroughly clean the equipment by remov-ing all dust and other accumulations. Wipeor vacuum clean the buses and supports. Donot use compressed air for blowing out equip-ment.

2. Inspect buses and/or terminal lug connec-tions for signs of overheating or weakeningFigure 10. Rotating the breaker forward for inspection.

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of insulating supports. Check indicatingdevices and mechanical and key interlocksfor proper functioning. Lubricate all movingand rubbing parts with a suitable lubricant,such as Mobil 28 red grease.

3, Check primary and secondary disconnect-ing surfaces for signs of abnormal wear oroverheating. If required, clean contacts with asuitable solvent. Discoloration of silvered sur-faces is not harmful unless atmospheric con-ditions cause deposits, such as sulfides, on thecontact surfaces.

4 Check to see that all anchor bolts and struc-ture bolts are tight Inspect all cable or busconnections or for signs of overheating andtighten all loose connections. Check that allsecondary connections are secure and allcontrol wiring is intact.

5. After cleaning with the breaker removed,measure and record resistances to groundand between phases of insulation on busesand connections. Since definite limits cannotbe given for satisfactory resistance values,keep a record of resistance readings so thatweakening of insulation from one mainte-nance period to the next can be recognized bycomparing readings. Readings should betaken under similar conditions each time, ifpossible, and the record should include tem-perature and humidity.High potential tests are not required, but if itseems advisable, based on insulation resis-tance tests or after repairs, test voltage shouldnot exceed 75% of the factory test voltage,which is two times the rating plus 1000 volts.

6. Operate each breaker in the TEST position toensure proper functioning. This is particu-larly important for breakers that normallyremain in either the opened or closed posi-tions for long periods.

7. When the equipment is subject to unusualconditions, such as contaminating fumes andexcessive moisture, schedule maintenance atmore frequent intervals. In this case, this pro-cedure may not be sufficient and additional

precautions may be necessary to protect theequipment.

LubricationAll the areas subject to friction are liberally coatedat the factory with Mobil 28 red grease. If contactsurfaces, the breaker power screw, and the inter-lock pin are cleaned during maintenance, coat theprimary disconnect contact surfaces, the threads ofthe nut or screw, and the interlock pin with Mobil28.

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GE Electrical Distribution & Control

General Electric Company41 Woodford Ave., Plainville, CT 06062

© 1994 General Electric CompanyGEH-6271 1294



power break® ii circuit breakers

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