Power And Grounding Wiring, Circuit Breakers And Fuses - WEG CFW500 Manual Del Usuario

Installation and Connection

3.2.2 Power and Grounding Wiring, Circuit Breakers and Fuses

ATTENTION!
Use proper cable lugs for the power and grounding connection cables. Refer
„
to Table B.1 on page 146
Keep sensitive equipment and wiring at a minimum distance of 0.25 m from the
„
inverter and from the cables connecting the inverter to the motor.
It is not recommended the use of mini circuit breakers (MDU), because of
„
the actuation level of the magnet.
ATTENTION!
Residual Current Device (RCD):
When installing an RCD to guard against electrical shock, only devices with
„
a trip current of 300 mA should be used on the supply side of the inverter.
Depending on the installation (motor cable length, cable type, multimotor
„
configuration, etc.), the RCD protection may be activated. Contact the RCD
manufacturer for selecting the most appropriate device to be used with
inverters.
NOTE!
The wire gauges listed in
„
Installation conditions and the maximum permitted voltage drop must be
considered for the proper wiring sizing.
In order to meet UL requirements, use ultra fast (for frame sizes A, B and C),
„
and use fuse type J or circuit breaker (for frame sizes D and E) fuses at the
inverter supply with a current not higher than the values presented in
B.1 on page
14 | CFW500
for recommended wiring, circuit breakers and fuses.
Table B.1 on page 146
146.
are orientative values.
Table