Siemens 38-3AH3 38 kV instruction manual Standard

Page 29

Vacuum interrupter/ operator

Figure 22: Typical elementary diagram

(+)

								01
			01					T
			01
			C
		SD16	SD13
	W	21	LS21				G	R
		22	LS21	41
				41	52b

				42
				42
	SD3			22	21	14	SD4	SD1
		Motor		22	21	14
		Motor	88		52Y	LS3	52Y
	13			21	22	13	31	24
	13						31	24
	LS41			31			52b	52a
DC supply	14	21		32	52Y		32	23
				32
			LS22
		22	LS22	A1		A1		A1
				A1		A1		A1
					52SRC		52Y	52T
					52SRC		52Y	52T
		22	22	A2		A2	SD14	A2
		22	22					34
			MI1 MI2	13				34
		21	MI1 MI2	13				52a
		21	21		LS9			33
		TB		14	LS9			33
		TB		14				SD2
		1						SD2
		2
		3
		4
		5
	SD15	6

(-)

SD11			SD9			SD7			SD5
54	64	52a	91	101		74	84		111	121
	52a	52a		52b	52b		52a	52a		52b	52b
55	63		92	102		73	83		112	122
SD12			SD10			SD8			SD6

88.0- Spring-charging motor

52a - Auxiliary switch is open when circuit breaker is open

52b - Auxiliary switch is closed when circuit breaker is closed

52SRC - Spring-release coil (close)

52T - Shunt trip coil

52Y - Closing relay (anti-pump)

G- Green indicating light (trip)

LS	- Spring-charged switch

MI1, MI2 - Mechanical interlock

OI/C	- Control switch (close)
OI/T	- Control switch (trip)

R- Red indicating light (closed)

W- White indicating light (spring- charged).

Standard:

Fuses in close circuit. Slugs in trip circuit (fuses optional).

Shown with springs DISCHARGED, trip-latch reset, circuit breaker OPEN, CONNECT or WITHDRAWN position.

29

Image 29

Contents

Answers for energy Qualified person Table of contents Introduction Signal words Hazardous ProceduresIntroduction Introduction Field service operation and warranty issuesShipping damage claims Introduction Receiving procedureReceiving, handling and storage Receiving, handling and storage Handling procedureIndoor storage Storage procedureOutdoor storage Space heatingDe-energizing control power in switchgear Installation checks and functional testsInspections, checks and tests without control power 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/ operatorStored-energy operating mechanism Phase barriersPrimary disconnects Construction Interrupter/operator moduleSwitching operation Current-path assemblyCircuit-breaker pole Vacuum interrupterType 38-3AH3 vacuum circuit breaker pole section Stored-energy operating mechanism Mode of operation Auxiliary switchOperating mechanism Indirect releases tripping coilsUse of manual-spring operation crank ClosingOpening Trip-free functionalityRapid auto-reclosing 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 Undervoltage optional Indirect releases dual-trip orSecondary shunt release optional 54.2Position a locked Secondary disconnect Capacitor-trip deviceShock absorber Truck-operated cell TOC switch Mechanism-operated cell MOC switch optionalShutter-operating linkage Secondary disconnect Shutters Rating interlock Trip-free interlockCircuit-breaker frame Ground disconnectVehicle function and operational interlocks Racking mechanismAlignment Interlocks Circuit breaker racking-interlocksRacking 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 lubricationCleanliness check Removal from switchgearChecks of the primary power path Circuit Number Maintenance and lubricationInspection of primary disconnects Checks of the stored-energy operator mechanismTypical for all three-phases Manual-spring charging and contact- erosion checks Fastener checkAutomatic spring-charging check control power required Wiring and terminals checkElectrical-control checks Secondary-disconnect checkTypical vacuum interrupter contact curve Vacuum-interrupter mechanical check Spring-charging motor checksHigh-potential test voltages Vacuum-integrity check using dielectric testHigh-potential tests Voltage Frequency withstand Field-test voltageContinuous Contact Inspection and cleaning of circuit- breaker insulationRating a Functional testsOverhaul Replacement at overhaulCircuit-breaker overhaul Circuit breaker Number TypeOverhaul 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 Maximum design voltage Permissible tripping delay YValues Voltage Voltage range factor K3 Insulation Withstand Voltage levels Lightning-impulse BILLevels Voltage levels Lightning-impulse BIL Rated Maximum design voltageRated Continuous4 Short-circuit at rated maximum design voltage I5, 6Remarks Appendix