Siemens 38-3AH3 38 kV instruction manual Qualified person

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Hazardous voltages and high speed moving parts.

Will cause death, serious injury or property damage.

Always de-energize and ground the equipment before maintenance. Read and understand this instruction manual before using equipment. Maintenance should be performed only by qualified personnel. The use of unauthorized parts in the repair of the equipment or tampering by unqualified personnel will result in dangerous conditions which will cause death, severe injury or equipment damage. Follow all safety instructions contained herein.

Important

The information contained herein is general in nature and not intended for specific application purposes. It does not relieve the user of responsibility to use sound practices in application, installation, operation and maintenance of the equipment purchased. Siemens reserves the right to make changes in the specifications shown herein or to make improvements at any time without notice or obligations. Should a conflict arise between the general information contained in this publication and the contents of drawings or supplementary material or both, the latter shall take precedence.

Qualified person

For the purpose of this instruction manual a qualified person is one who is familiar with the installation, construction or operation of the equipment and the hazards involved. In addition, this person has the following qualifications:

Is trained and authorized to de-energize, clear, ground and tag circuits and equipment in accordance with established safety procedures.

Is trained in the proper care and use of protective equipment, such as: rubber gloves, hard hat, safety glasses or face shields, flash clothing, etc., in accordance with established safety practices.

Is trained in rendering first aid.

Further, a qualified person shall also be familiar with the proper use of special precautionary techniques, personal protective equipment, insulating and shielding materials and insulated tools and test equipment. Such persons are permitted to work within limited approach of exposed live parts operating at 50 volts or more, and shall, at a minimum, be additionally trained in all of the following:

The skills and techniques necessary to distinguish exposed energized parts from other parts of electric equipment.

The skills and techniques necessary to determine the nominal voltage of exposed live parts.

The approach distances specified in NFPA 70E and the corresponding voltages to which the qualified person will be exposed.

The decision-making process necessary to determine the degree and extent of the hazard and the personal protective equipment and job planning necessary to perform the task safely.

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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 storageOutdoor storage Storage procedureIndoor 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 interruptersStored-energy operating mechanism Phase barriersPrimary disconnects 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 orUndervoltage 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 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 testsCleanliness check Removal from switchgearChecks of the primary power path 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 test voltages Vacuum-integrity check using dielectric testHigh-potential tests 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