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