Installation and Connection
3-8
3
Figure 3.9
- Grounding terminals
3.2.2 Power / Grounding Wiring and Fuses
ATTENTION!
Provide adequate terminals when flexible cables are used for the power and grounding
connections.
ATTENTION!
Sensitive equipment such as PLCs, temperature controllers, and thermal couples shall be kept at a
minimum distance of 0.25 m (0.82 ft) from the frequency inverter and from the cables that connect
the inverter to the motor.
DANGER!
Improper cable connection:
The inverter will be damaged in case the input power supply is connected to the output terminals
(U/T1, V/T2, or W/T3).
Check all the connections before powering up the inverter.
In case of replacing an existing inverter by a CFW-11, check if the installation and wiring is according
to the instructions listed in this manual.
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.
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(b) Frame D
Grounding
Grounding
