IEEE DRAFT C37.71 : D03 2000

1 Scope
2 References
3 Definitions
4 Service conditions
4.1 Usual service conditions
4.2 Unusual service conditions
4.2.1 Abnormal ambient temperatures
4.2.2 Altitudes above 3300ft (1000m)
4.2.3 Other conditions that may affect design and application
5 Ratings
5.1 Rating information
5.2 Voltage ratings and related test requirements
5.3 Current test values
5.3.1 Conditions of continuous current rating
5.3.2 Limits of observable temperature rise
6 Design tests
6.1 General
6.1.1 Condition of switch to be tested
6.1.2 Mounting of specimen
6.1.3 Frequency
6.1.4 Single phase testing
6.1.5 Test sequence
6.1.6 Other tests
6.2 Interrupting current tests
6.2.1 Load switching tests
6.2.2 Magnetizing current tests
6.2.3 Cable charging current tests
6.3 Short-time current tests
6.3.1 Momentary current test
6.3.2 Making current test
6.3.3 One second current test
6.4 Insulation (Dielectric) tests
6.4.1 Points of application of test voltage
6.4.2 Temperature
6.4.3 Dielectric test procedures and voltage measurements
6.4.4 Impulse withstand tests
6.4.5 60 Hz withstand test procedures
6.5 Continuous current test
6.5.1 Test conditions
6.5.2 Connections
6.5.3 Test procedure
6.5.4 Determination of ambient temperature
6.5.5 Thermal runaway test
6.6 Mechanical operation test
6.6.1 Test condition
6.6.2 Condition after test
6.7 Partial discharge (corona) level test
6.8 DC withstand test
6.8.1 Test procedure
6.9 Pressure test
6.9.1 External pressure test
6.9.2 Internal pressure test
7 Production tests
7.1 Circuit resistance test
7.1.1 Test procedure
7.2 60Hz withstand test
7.3 Leak test
7.4 Operating assurance test
7.5 Partial discharge (corona) level test
8 Conformance tests
8.1 Temperature measurements
8.2 Impulse withstand tests
8.3 Loop current requirement
9 Construction requirements
9.1 Grounding provision
9.2 Manual operation provision
9.2.1 Subsurface switches
9.2.2 Vault switches
9.3 Position indicators
9.4 Insulating medium quantity indicators
9.5 Drain and replacement provisions
9.6 Sampling and addition provisions
9.7 Tank construction
9.8 Termination
9.9 Bushing designation
9.10 Nameplate
9.11 User identification plate
10 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.