Specifications

PIP ELTFT01
March 2001 Field Inspection and Testing of
New Electrical Equipment
Process Industry Practices Page 9 of 23
4. Switchrack, transformer, and medium-voltage switch ground
connections
7. Medium-Voltage Switchgear
7.1 Equipment and Installation Check Items
7.1.1 Check switchgear assembly for alignment, levelness, and tightness of all
bolting.
7.1.2 Check all equipment for the removal of blocking, supports, temporary ties,
and temporary jumper wires.
7.1.3 Check control power transformer and PT fuses for size, type, and circuit
location.
7.1.4 Check CT and PT ratios.
7.1.5 Check CPT size.
7.1.6 Check all components for proper identification per the drawings and
specifications.
7.2 Equipment and Installation Inspection Items
7.2.1 Inspect switchgear bus bar connections for tightness by verifying that the
torque meets manufacturer’s specifications. Verify that connection hardware
is consistent with the Owner’s project specifications.
7.2.2 Inspect switchgear bus supports for cleanliness and tightness.
7.2.3 Inspect ground connections to switchgear ground bus.
7.2.4 Inspect operation of the drawout mechanism including mechanical
interlocks, position indicators, and safety features.
7.2.5 Inspect operation of shutter devices.
7.2.6 Inspect operation of PT disconnecting and grounding mechanisms.
7.2.7 Inspect circuit breaker insulating parts for cleanliness and dryness.
7.2.8 Inspect electrical contact surfaces of air circuit breaker for cleanliness and
smoothness. Lubricate stationary contact surfaces per manufacturer's
recommendations.
7.2.9 Inspect contact wipe and alignment of air circuit breaker and verify that it is
in accordance with manufacturer's recommendations.
7.2.10 Inspect vacuum breaker mechanical adjustments and critical dimensions in
accordance with manufacturer's recommendations.
7.2.11 Inspect circuit breaker manual operation (maintenance closing procedure) to
verify that all parts are free and that they work smoothly.
7.2.12 Inspect operation of breaker mechanical trip function.