Wiring Of The Motor Connection Terminals U, V, W; Wiring Of The Ground Terminals - Mitsubishi Electric MELIPM Series Instruction Manual

3.2.4 Wiring of the motor connection terminals U, V, W

Connect these terminals to the motor. Match the phase sequence of the motor
connection terminals U, V, W with that of the motor cables. Incorrect phase
sequence will run the motor in reverse.
The wiring length between the drive unit and motor should be 100m
maximum. Long wiring may cause torque to be insufficient or the
overcurrent protection function to be activated.
Between the drive unit and motor, do not fit a power capacitor, surge
suppressor or FR-BIF radio noise filter (option).

3.2.5 Wiring of the ground terminals

There are two ground terminals. Connect one ground terminal to the motor's
ground terminal and perform shared grounding on the drive unit.
Avoid shared grounding with the other equipment susceptible to
noise, and perform exclusive or single-point grounding.
Drive unit
NOTICE
Shared grounding
Not allowed
Ground the drive unit and motor securely to prevent an electric shock
due to leakage currents. (Class D grounding, grounding resistance
100Ω Ω Ω Ω max.)
For grounding, connect the cable to the exclusive ground terminal. (Do
not use the screw of the casing, chassis or the like.)
Ground
U V W
terminal
U V W
Ground
CAUTION
Drive unit
Other
Drive unit
equipment
Exclusive grounding
Allowed
WARNING
3-4
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Motor
Motor
Other
Drive unit
equipment
1-point grounding
Allowed
3. WIRING
Other
equipment