Grounding Connections - WEG CFW100 User Manual

The characteristics of the cable used to connect the motor to the inverter, as well as its
interconnection and routing, are extremely important to avoid electromagnetic interference in
other equipment and not to affect the life cycle of windings and bearings of the controlled motors.
Keep motor cables away from other cables (signal cables, sensor cables, control cables, etc.),
according to
When using shielded cables to install the motor:
Follow the recommendations of IEC60034-25.
„
Use the low impedance connection for high frequencies to connect the cable shield to the
„
grounding.

3.2.4 Grounding Connections

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ATTENTION!
If a disconnect switch or a contactor is installed at the power supply between the
inverter and the motor, never operate it with the motor spinning or with voltage
at the inverter output.
item 3.2.6 Cable Separation Distance on page
DANGER!
The inverter must be connected to a protective ground (PE).
„
Use a minimum wire gauge for ground connection equal to the indicated in
„
B1 on page 121.
Connect the inverter grounding connections to a ground bus bar, to a single
„
ground point or to a common grounding point (impedance ≤ 10 Ω).
The neuter conductor of the line that feeds the inverter must be solidly grounded;
„
however, this conductor must not be used to ground the inverter.
Do not share the grounding wiring with other equipment that operate with high
„
currents (e.g.: high voltage motors, welding machines, etc.).
Installation and Connection
24.
Table