Siemens 38-3AH3 38 kV instruction manual Stored-energy operating mechanism

Page 20

Vacuum interrupter/ operator

Figure 15: Stored-energy operating mechanism

55.2 50.3 50.3.1 62.3 62.6 62.5 62.5.2

62.2

50.2

50.1

55.1

62.0

50.4.1

55.0

50.4

58.0

63.7

59.0

60.0

61.8

64.0 63.5

62.8 64.3 64.3.1

68.0

53.0

53.1

54.1

54.0

64.2

68.1

63.1

63.0

50.1- Manual-spring charging port

50.2- Charging-mechanism gear box

50.3- Charging flange

50.3.1 - Driver

50.4- Spring-charging motor (behind limit switches)

50.4.1 - Limit switches

53.0- Close button

53.1- Close coil

54.0- Open button

54.1- Trip coil

54.2- Undervoltage release (not shown)

55.0- Spring-charge indicator

55.1- Linkage

55.2- Control lever

58.0- CLOSED/OPEN indicator

59.0- Operation counter

60.0- Operator housing

61.8- Shock absorber

62.0- Closing spring

62.2- Crank

62.3- Cam disc

62.5- Lever

62.5.2 - Close-latch pawl

62.6- Driver lever

62.8- Trip-free coupling rod

63.0- Jack shaft

63.1- Phase C lever

63.5- Phase B lever

63.7- Phase A lever

64.0- Opening spring

64.2- Pawl

64.3- Lever

64.3.1 - Pawl roller

68.0- Auxiliary switch

68.1- Linkage

20

Image 20

Contents

Answers for energy Qualified person Table of contents Introduction Signal words Hazardous ProceduresIntroduction Field service operation and warranty issues IntroductionShipping damage claims Introduction Receiving procedureReceiving, handling and storage Handling procedure Receiving, handling and storageStorage procedure Indoor storageOutdoor storage Space heatingDe-energizing control power in switchgear Installation checks and functional testsInspections, checks and tests without control power 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 interrupters Stored-energy operating mechanism Phase barriers Primary disconnects Interrupter/operator module ConstructionCurrent-path assembly Switching operationCircuit-breaker pole Vacuum interrupterType 38-3AH3 vacuum circuit breaker pole section Stored-energy operating mechanism Auxiliary switch Mode of operationOperating mechanism Indirect releases tripping coilsClosing Use of manual-spring operation crankTrip-free functionality OpeningRapid 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 Indirect releases dual-trip or Undervoltage optionalSecondary shunt release optional 54.2Position a locked Secondary disconnect Capacitor-trip deviceShock absorber Mechanism-operated cell MOC switch optional Truck-operated cell TOC switchShutter-operating linkage Secondary disconnect Shutters Trip-free interlock Rating interlockCircuit-breaker frame Ground disconnectRacking mechanism Vehicle function and operational interlocksAlignment 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 testsCleanliness check Removal from switchgearChecks of the primary power path Maintenance and lubrication Circuit NumberInspection of primary disconnects Checks of the stored-energy operator mechanismTypical for all three-phases Fastener check Manual-spring charging and contact- erosion checksWiring and terminals check Automatic spring-charging check control power requiredElectrical-control checks Secondary-disconnect checkTypical vacuum interrupter contact curve Spring-charging motor checks Vacuum-interrupter mechanical checkHigh-potential test voltages Vacuum-integrity check using dielectric testHigh-potential tests Field-test voltage Voltage Frequency withstandInspection and cleaning of circuit- breaker insulation Continuous ContactRating a Functional testsReplacement at overhaul OverhaulCircuit-breaker overhaul 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 Permissible tripping delay Y Maximum design voltageValues Voltage Voltage range factor K3 Insulation Withstand Voltage levels Lightning-impulse BILRated Maximum design voltage Levels Voltage levels Lightning-impulse BILRated Continuous4 Short-circuit at rated maximum design voltage I5, 6Remarks Appendix