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What are the major maintenance projects for SF6 circuit breakers?
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【description】What are the major maintenance projects for SF6 circuit breakers? Generally, the following tests are required after major repairs: 1. Measure insulation resistance; Measure the resistance of each phase's conductive circuit; 3. AC voltage withstand test; 4. Testing of circuit breakers and equalizing capacitors; Measure the opening and closing time of the circuit breaker; Measure the opening and closing speed of the circuit breaker; 7...
What are the major maintenance projects for SF6 circuit breakers?
Generally, the following tests are required after major repairs:
1. Measure insulation resistance;
2.Measure the resistance of each phase's conductive circuit;
3. AC voltage withstand test;
4. Testing of circuit breakers and equalizing capacitors;
Measure the opening and closing time of the circuit breaker;
Measure the opening and closing speed of the circuit breaker;
Measure the synchronicity and coordination time of the opening and closing of the main and auxiliary contacts of the circuit breaker;
Measure the input time and resistance value of the circuit breaker closing resistance;
Measure the insulation resistance and DC resistance of the opening and closing coils of the circuit breaker;
Test of 10 circuit breaker operating mechanism;
Test of 11 bushing current transformers;
Measure the moisture content of SF6 gas inside the circuit breaker;
13 Sealing test;
Inspection of 14 gas density relays, pressure gauges, and pressure operated valves.
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