Specifications

PIP ELTFT01
Field Inspection and Testing of March 2001
New Electrical Equipment
Process Industry Practices Page 16 of 23
11.1.8 Check PT and CT ratios.
11.1.9 Check CPT size and rating.
11.1.10 Check voltage rating of contactor coil.
11.1.11 Verify that metering or relaying devices using resistance temperature
detectors (RTDs) have the correct rating.
11.1.12 Check fuses and wiring to power factor correction capacitors for size and
rating.
11.1.13 Check all components for proper identification according to the drawings
and specifications.
11.2 Equipment and Installation Inspection Items
11.2.1 Inspect MCC 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.
11.2.2 Inspect MCC bus bar supports for cleanliness and tightness.
11.2.3 Inspect ground connections to ground bus.
11.2.4 Inspect operation of mechanical interlocks, position indicators, drawout or
rollout mechanism, and all safety interlock features.
11.2.5 Inspect contactor rating.
11.2.6 Inspect contactor-insulating parts for cleanliness and dryness.
11.2.7 Inspect contactor electrical contact surfaces for cleanliness and smoothness.
Lubricate per manufacturer's instructions.
11.2.8 Inspect contactor-seating surfaces of unplated and laminated magnet faces of
contactor and relays. Remove any rust or rust preventative if present.
11.2.9 Inspect contactor power stabs and adjust per manufacturer's instructions.
11.2.10 Inspect manual operation of contactor and mechanical relay devices to verify
that all parts are free and that they work smoothly. For air contactors, verify
adjustment for contact wipe and alignment per manufacturer's instructions.
11.2.11 Inspect lubrication of contactor moving parts.
11.2.12 Inspect contactor vacuum bottles for damage.
11.2.13 Inspect size, type, and rating of current-limiting power fuses.
11.2.14 Inspect overload protective device rating and setting.
11.3 Testing Requirements
11.3.1 Test insulation resistance of MCC bus with a 1-minute test (phase to phase
and phase to ground).
11.3.2 Test insulation resistance of control power and instrument transformers with
a 1-minute test at applicable voltage.