ELECTRICAL TEST HIGH VOLTAGE MOTOR CONTROLGEAR

FIELD INSTALLATION TESTS

Inspect primary and auxiliary equipment for physical damage, missing parts and proper assembly.
Compare equipment nameplate data with one-line, design plans and starter schedule.
Check nameplate voltage and current ratings for breakers, contactors and primary and secondary fuses.
Compare overload protection with motor full load current for proper sizing.
Verify component sizing versus load.
Check contactor finger stab alignment and tightness on draw-out designs.
Protective grounding is correctly installed and connected to main ground.
Remove shipping and blocking material from starter and vertical sections.
Check draw-out cubicles and wire ways for cleanliness.

MECHANICAL INSPECTION

Torque all accessible bolted connections.
Check insulators and the insulation system.
Inspect main bus and bus taps to switches and potential transformers.
Manually operate breakers and contactors. Check for freedom of movement of all moving parts.
Check for main contact pressure alignment and full contact area on contactors.
Check operation of door mechanical interlocking linkage.

ELECTRICAL INSPECTION

Check wiring point to point and megger.
Check wire markers, and that terminal block connections are secure and properly identified.
Megger and high potential test main bus phase to ground and phase to phase.
Measure bus resistance and joint contact resistance.
Inspect all protective relays and devices for correct operation and settings.
Check to see that space heaters are connected and operable.
Megger outgoing circuits.
Check PT and CT rating, ratio, and insulation resistance, test in accordance with procedures.
Check calibration of voltmeters and ammeters.
Check rating of all fuses.
Verify relay trip/alarm functions.
Verify motor ground fault protection.
Check effectiveness of tripping devices.
Megger contactors and circuit breakers phase to phase and phase to ground.
Measure the contact resistance of each contactor and circuit breaker.
Check the Phase Rotation of the voltage on the main bus.