with low-resistance ohmmeter.
(2)
Perform a contact resistance test.
(3)
Sample insulating liquid.
Sample shall be tested for:
(a)
Dielectric breakdown voltage
(b)
Color
(c)
Visual condition
(4)
Perform overpotential tests.
(5)
Test sectionalizer counting function.
(6)
Test sectionalizer lockout function.
(7)
Test for reset timing on trip actuator.
][3.4.7.5
Potential Transformers
a.
Visual and Mechanical Inspection
(1) Compare equipment nameplate data with specifications and
approved shop drawings.
(2)
Verify correct connection.
(3) Verify that adequate clearances exist between primary and
secondary circuit wiring.
(4) Verify tightness of accessible bolted electrical connections
by calibrated torque-wrench method.
(5) Verify that all required grounding and shorting connections
provide good contact.
(6)
Verify correct fuse sizes.
b.
Electrical Tests
(1) Perform resistance measurements through all bolted
connections with low-resistance ohmmeter
(2)
Perform insulation-resistance tests.
(3)
Perform polarity tests.
(4)
Perform turns-ratio tests.
][3.4.7.6
Current Transformers
a.
Visual and Mechanical Inspection
(1) Compare equipment nameplate data with specifications and
approved shop drawings.
(2)
Inspect physical and mechanical condition.
SECTION 16301N
Page 44
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