2.
Inspect physical and mechanical condition.
3.
Confirm correct application of manufacturer's recommended
4.
Inspect anchorage, alignment, and grounding.
5.
Perform all mechanical operational tests on both the circuit
breaker and its operating mechanism.
6.
Measure critical distances such as contact gap as recommended by
manufacturer.
7.
Verify tightness of accessible bolted connections by calibrated
torque-wrench method. Thermographic survey[ is not][ is] required.
8.
Record as-found and as-left operation counter readings.
b.
Electrical Tests
1.
Perform a contact-resistance test.
2.
Verify trip, close, trip-free, and antipump function.
3.
Trip circuit breaker by operation of each protective device.
4.
Perform insulation-resistance tests.
5.
Perform vacuum bottle integrity (overpotential) test across each
bottle with the breaker in the open position in strict accordance
with manufacturer's instructions. Do not exceed maximum voltage
stipulated for this test.
3.5.1.3
Medium-Voltage Circuit Breakers (SF6)
a.
Visual and mechanical inspection
1.
Compare equipment nameplate data with specifications and approved
shop drawings.
2.
Inspect physical and mechanical condition.
3.
Confirm correct application of manufacturer's recommended
4.
Inspect anchorage and grounding.
5.
Inspect and verify adjustments of mechanism in accordance with
manufacturer's instructions.
[6.
Inspect and service air compressor in accordance with
manufacturer's instructions.]
7.
Test for gas leaks in accordance with manufacturer's instructions.
8.
Verify correct operation of all air and SF6
gas pressure alarms
and cutouts.
SECTION 16361N
Page 43
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