Siemens 38-3AH3 38 kV instruction manual Shutter-operating linkage Secondary disconnect Shutters

Page 34

Vacuum interrupter/ operator

Figure 33: Circuit-breaker compartment (MOC/TOC switch cover removed for photo)

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5

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1

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8

9

2, 4, 6

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	1.	Shutter-operating linkage	7.	Secondary disconnect
	2.	Shutters	8.	Trip-free padlock provisions
	3.	Racking mechanism padlock	9.	Current-transformer barrier
		provisions	10. Racking mechanism
			10. Racking mechanism
	4.	Primary disconnects	11. Ground bar
		(behind shutters)	11. Ground bar
	5.	MOC switch (optional)	12. Rating interlocks
	6.	Current transformers	13. MOC operating pantograph
		(behind barrier)

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2, 4, 6

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9

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Image 34

Contents

Answers for energy Qualified person Table of contents Introduction Signal words Hazardous ProceduresIntroduction Field service operation and warranty issues IntroductionReceiving, handling and storage Introduction Receiving procedureShipping damage claims Handling procedure Receiving, handling and storageOutdoor storage Storage procedureIndoor storage Space heatingInspections, checks and tests without control power Installation checks and functional testsDe-energizing control power in switchgear Installation checks and functional tests Racking crank engagement procedure Type 38-3AH3 vacuum circuit breaker rackingPhysical inspections Manual-spring charging checkFinal mechanical inspections without control power Split-plug jumper connected to circuit breakerVacuum interrupter/ operator Vacuum interrupter/ operator Vacuum interruptersPrimary disconnects Phase barriersStored-energy operating mechanism Interrupter/operator module ConstructionCircuit-breaker pole Current-path assemblySwitching operation Vacuum interrupterType 38-3AH3 vacuum circuit breaker pole section Stored-energy operating mechanism Operating mechanism Auxiliary switchMode of operation Indirect releases tripping coilsClosing Use of manual-spring operation crankRapid auto-reclosing Trip-free functionalityOpening Manual operation62.2 62.5.2 50.3.1 53.0 Pawl roller 62.5.2 Close-latch pawl Vacuum interrupter/ operator Discharged Closing Standard Secondary shunt release optional Indirect releases dual-trip or Undervoltage optional 54.2Position a locked Shock absorber Capacitor-trip deviceSecondary disconnect Mechanism-operated cell MOC switch optional Truck-operated cell TOC switchShutter-operating linkage Secondary disconnect Shutters Circuit-breaker frame Trip-free interlockRating interlock Ground disconnectAlignment Racking mechanismVehicle function and operational interlocks Interlocks Circuit breaker racking-interlocksRacking interlocks Closed circuit breaker interlock Automatic closing-spring energy release Trip-free interlock position mechanical interlock Maintenance Introduction and maintenance intervalsMaintenance Recommended hand toolsRecommended maintenance and lubrication Inspection items and testsChecks of the primary power path Removal from switchgearCleanliness check Inspection of primary disconnects Maintenance and lubricationCircuit Number Checks of the stored-energy operator mechanismTypical for all three-phases Fastener check Manual-spring charging and contact- erosion checksElectrical-control checks Wiring and terminals checkAutomatic spring-charging check control power required Secondary-disconnect checkTypical vacuum interrupter contact curve Spring-charging motor checks Vacuum-interrupter mechanical checkHigh-potential tests Vacuum-integrity check using dielectric testHigh-potential test voltages Field-test voltage Voltage Frequency withstandRating a Inspection and cleaning of circuit- breaker insulationContinuous Contact Functional testsCircuit-breaker overhaul Replacement at overhaulOverhaul Circuit breaker Number TypeVacuum interrupter replacement OverhaulSetting Vacuum interrupter replacement illustration Overhaul Checking the contact stroke Open the circuit breaker Hydraulic shock absorberMaintenance and troubleshooting Sub-assembly Inspect forMaintenance and troubleshooting Problem Symptoms Possible causes and remediesClosed Appendix Appendix Values Voltage Voltage range factor K3 Insulation Withstand Permissible tripping delay YMaximum design voltage Voltage levels Lightning-impulse BILRated Continuous4 Rated Maximum design voltageLevels Voltage levels Lightning-impulse BIL Short-circuit at rated maximum design voltage I5, 6Remarks Appendix