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DRAFT STANDARD FOR THREE-PHASE, MANUALLY OPERATED SUBSURFACE AND VAULT LOAD-INTERRUPTING SWITCHES FOR ALTERNATING-CURRENT SYSTEMS
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Available format(s):
Superseded date: 21-03-2001
Language(s):
Published date: 12-01-2013
Publisher: Institute of Electrical & Electronics Engineers
1 Scope2 References3 Definitions4 Service conditions4.1 Usual service conditions4.2 Unusual service conditions4.2.1 Abnormal ambient temperatures4.2.2 Altitudes above 3300ft (1000m)4.2.3 Other conditions that may affect design and application5 Ratings5.1 Rating information5.2 Voltage ratings and related test requirements5.3 Current test values5.3.1 Conditions of continuous current rating5.3.2 Limits of observable temperature rise6 Design tests6.1 General6.1.1 Condition of switch to be tested6.1.2 Mounting of specimen6.1.3 Frequency6.1.4 Single phase testing6.1.5 Test sequence6.1.6 Other tests6.2 Interrupting current tests6.2.1 Load switching tests6.2.2 Magnetizing current tests6.2.3 Cable charging current tests6.3 Short-time current tests6.3.1 Momentary current test6.3.2 Making current test6.3.3 One second current test6.4 Insulation (Dielectric) tests6.4.1 Points of application of test voltage6.4.2 Temperature6.4.3 Dielectric test procedures and voltage measurements6.4.4 Impulse withstand tests6.4.5 60 Hz withstand test procedures6.5 Continuous current test6.5.1 Test conditions6.5.2 Connections6.5.3 Test procedure 6.5.4 Determination of ambient temperature6.5.5 Thermal runaway test6.6 Mechanical operation test6.6.1 Test condition6.6.2 Condition after test6.7 Partial discharge (corona) level test6.8 DC withstand test6.8.1 Test procedure6.9 Pressure test6.9.1 External pressure test6.9.2 Internal pressure test7 Production tests7.1 Circuit resistance test7.1.1 Test procedure7.2 60Hz withstand test7.3 Leak test7.4 Operating assurance test7.5 Partial discharge (corona) level test8 Conformance tests8.1 Temperature measurements8.2 Impulse withstand tests8.3 Loop current requirement9 Construction requirements9.1 Grounding provision9.2 Manual operation provision9.2.1 Subsurface switches9.2.2 Vault switches9.3 Position indicators9.4 Insulating medium quantity indicators9.5 Drain and replacement provisions9.6 Sampling and addition provisions9.7 Tank construction9.8 Termination9.9 Bushing designation9.10 Nameplate9.11 User identification plate10 Shipping requirements
Standard applies to three-phase, group operated 60 Hz, subsurface and vault, load interrupting switches with maximum ratings of 600 A and 38 kV, and utilizing separable insulated connectors.
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