HIGH VOLTAGE MOTOR CONTROL GEAR ELECTRICAL FIELD TEST

HIGH VOLTAGE MOTOR CONTROL GEAR ELECTRICAL FIELD TEST

VISUAL INSPECTION
Yes
No
1.      Inspect primary and auxiliary equipment for physical damage, missing parts and proper assembly.
2.      Compare equipment nameplate data with one-line, design plans and starter schedule.
3.   Check nameplate voltage and current ratings for
breakers, contactors and primary and secondary fuses.
4.
Compare overload protection with motor full load
current for proper sizing.
5.
Verify component sizing versus load.
6.
Check contactor finger stab alignment and tightness
on draw-out designs.
7.
Protective grounding is correctly installed and
connected to main ground.
8.
Remove shipping and blocking material from starter
and vertical sections.
9.
Check draw-out cubicles and wire ways for
cleanliness.
MECHANICAL INSPECTION
Yes
No
1.
Torque all accessible bolted connections.
2.
Check insulators and the insulation system.
3.
Inspect main bus and bus taps to switches and
potential transformers.
4.
Manually operate breakers and contactors. Check for
freedom of movement of all moving parts.
5.
Check for main contact pressure alignment and full
contact area on contactors.
6.
Check operation of door mechanical interlocking
linkage.
ELECTRICAL INSPECTION
Yes
No
1.
Check wiring point to point and megger.
2.
Check wire markers, and that terminal block
connections are secure and properly identified.
3.
Megger and high potential test main bus phase to
ground and phase to phase.
4.
Measure bus resistance and joint contact resistance.
5.
Inspect all protective relays and devices for
correct operation and settings.
6.
Check to see that space heaters are connected and
operable.
7.
Megger outgoing circuits.
8.
Check PT and CT rating, ratio, and insulation
resistance, test in accordance with procedures.
9.
Check calibration of voltmeters and ammeters.
10.
Check rating of all fuses.
11.
Verify relay trip/alarm functions.
12.
Verify motor ground fault protection.
13.
Check effectiveness of tripping devices.
14.
Megger contactors and circuit breakers phase to
phase and phase to ground.
15.
Measure the contact resistance of each contactor and
circuit breaker.
16.
Check the Phase Rotation of the voltage on the main
bus.
NAMEPLATE INFORMATION
Equipment Identification/manufacturer
Serial number/model number
Rated Voltage
Rated current
Interrupting Rating
(TEST PERFORMED IN
ACCORDANCE WITH VALUES RECOMMENDED BY VENDOR OR VALUES IN P-000)
MOTOR CONTROL CENTER
RECORDED TEST DATA
ITEMS
TESTED
MEGGER
TEST
DC
HI-POT LEAKAGE
Insulation
resistance in Meg-ohms
Current
in micro-amps
Phase A to Ground
Phase B to Ground
Phase C to Ground
Phase A to Phase B
Phase B to Phase C
Phase C to Phase A
MOTOR CONTROL
CENTER CONTACT
RESISTANCE
FEEDER NO.
Breaker or
Contactor No.
Phase A Line to
Load micro-ohms
Phase B Line to
Load micro-ohms
Phase C Line to
Load micro-ohms
MOTOR CONTROL
CENTER DATA SHEET
Voltage Rating:
DEVICE NO.
HORSE POWER
FULL LOAD
CURRENT
MOTOR PROTECTION
RELAY TYPE
RATING
FEEDER NO.
FEEDER
INSULATION RESISTANCE

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1 Response

  1. August 7, 2018

    […] Please read also: HIGH VOLTAGE MOTOR CONTROL GEAR ELECTRICAL FIELD TEST_PRECOMMSISSIONING […]

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