9.
Slow close/open breaker and check for binding.
10. Perform time-travel analysis.
11. Verify tightness of accessible bolted connections by calibrated
torque-wrench method. Thermographic survey[ is not][ is] required.
12. Record as-found and as-left operation counter readings.
b.
Electrical Tests
1.
Measure contact resistances.
2.
Perform insulation-resistance tests.
3.
Verify trip, close, trip-free, and antipump functions.
4.
Trip circuit breaker by operation of each protective device.
3.5.1.4
Transformers (Liquid-Filled)
a.
Visual and mechanical inspection
1.
Compare equipment nameplate data with specifications and approved
shop drawings.
2.
Inspect physical and mechanical condition.
Check for damaged or
cracked insulators and leaks.
[3.
Verify that cooling fans operate correctly and that fan motors
have correct overcurrent protection.]
[4.
Verify operation of all alarm, control, and trip circuits from
temperature and level indicators, pressure relief device, and
fault pressure relay.]
5.
Verify tightness of accessible bolted electrical connection by
calibrated torque-wrench method. Thermographic survey[ is not][
is] required.
6.
Verify correct liquid level in transformer tank.
7.
Perform specific inspections and mechanical tests as recommended
by manufacturer.
8.
Verify correct equipment grounding.
b.
Electrical Tests
1.
Perform insulation-resistance tests.
2.
Perform turns-ratio tests.
3.
Perform insulation power-factor/dissipation-factor tests on
windings.
4.
Sample insulating liquid.
Sample shall be tested for:
(a)
Dielectric breakdown voltage
SECTION 16361N
Page 44
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