Siemens 38-3AH3 38 kV instruction manual Discharged

Page 27

Vacuum interrupter/ operator

Figure 20: Operating mechanism section diagram (drawout trip-free linkage shown) mechanism CLOSED, closing spring CHARGED

62.5.2- Close latch pawl

62.8.1- Spring return latch

62.8.2- Trip-free coupling link (draw bar)

62.8.3- Trip-free coupling lever

62.8.5- Push rod and cam assembly

62.8.6- Interlock lever push rod

62.8.7- Interlock lever actuator

62.8.8- Trip-free actuator

63.1- Lever - phase C

63.5- Lever - phase B

63.7- Lever - phase A

64.0- Opening spring 64.2.1 - Trip-latch pin

64.2.2 - Latching pawl release lever

64.3- Lever

64.3.1 - Jack shaft pawl

64.5- Opening spring shaft

**Numbered items moved from position shown in Figure 19: Operating mechanism section diagram (drawout trip-free linkage shown) mechanism CLOSED, closing spring

DISCHARGED.

	62.2
	50.3.1	62.3
	62.1	62.3
	62.1
62.5	50.3

62.5.1

62.2.2

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Image 27

Contents

Answers for energy Qualified person Table of contents Signal words Hazardous Procedures IntroductionIntroduction Introduction Field service operation and warranty issuesIntroduction Receiving procedure Receiving, handling and storageShipping damage claims Receiving, handling and storage Handling procedureSpace heating Storage procedureIndoor storage Outdoor storageInstallation checks and functional tests Inspections, checks and tests without control powerDe-energizing control power in switchgear Installation checks and functional tests Type 38-3AH3 vacuum circuit breaker racking Racking crank engagement procedureManual-spring charging check Physical inspectionsSplit-plug jumper connected to circuit breaker Final mechanical inspections without control powerVacuum interrupter/ operator Vacuum interrupters Vacuum interrupter/ operatorPhase barriers Primary disconnectsStored-energy operating mechanism Construction Interrupter/operator moduleVacuum interrupter Current-path assemblySwitching operation Circuit-breaker poleType 38-3AH3 vacuum circuit breaker pole section Stored-energy operating mechanism Indirect releases tripping coils Auxiliary switchMode of operation Operating mechanismUse of manual-spring operation crank Closing Manual operation Trip-free functionality Opening Rapid auto-reclosing62.2 62.5.2 50.3.1 53.0 Pawl roller 62.5.2 Close-latch pawl Vacuum interrupter/ operator Discharged Closing Standard 54.2 Indirect releases dual-trip orUndervoltage optional Secondary shunt release optionalPosition a locked Capacitor-trip device Shock absorberSecondary disconnect Truck-operated cell TOC switch Mechanism-operated cell MOC switch optionalShutter-operating linkage Secondary disconnect Shutters Ground disconnect Trip-free interlockRating interlock Circuit-breaker frameInterlocks Circuit breaker racking-interlocks Racking mechanismVehicle function and operational interlocks AlignmentRacking interlocks Closed circuit breaker interlock Automatic closing-spring energy release Trip-free interlock position mechanical interlock Introduction and maintenance intervals MaintenanceRecommended hand tools MaintenanceInspection items and tests Recommended maintenance and lubricationRemoval from switchgear Checks of the primary power pathCleanliness check Checks of the stored-energy operator mechanism Maintenance and lubricationCircuit Number Inspection of primary disconnectsTypical for all three-phases Manual-spring charging and contact- erosion checks Fastener checkSecondary-disconnect check Wiring and terminals checkAutomatic spring-charging check control power required Electrical-control checksTypical vacuum interrupter contact curve Vacuum-interrupter mechanical check Spring-charging motor checksVacuum-integrity check using dielectric test High-potential testsHigh-potential test voltages Voltage Frequency withstand Field-test voltageFunctional tests Inspection and cleaning of circuit- breaker insulationContinuous Contact Rating aCircuit breaker Number Type Replacement at overhaulOverhaul Circuit-breaker overhaulOverhaul Vacuum interrupter replacementSetting Vacuum interrupter replacement illustration Overhaul Hydraulic shock absorber Checking the contact stroke Open the circuit breakerSub-assembly Inspect for Maintenance and troubleshootingProblem Symptoms Possible causes and remedies Maintenance and troubleshootingClosed Appendix Appendix Voltage levels Lightning-impulse BIL Permissible tripping delay YMaximum design voltage Values Voltage Voltage range factor K3 Insulation WithstandShort-circuit at rated maximum design voltage I5, 6 Rated Maximum design voltageLevels Voltage levels Lightning-impulse BIL Rated Continuous4Remarks Appendix