Power/Grounding Wiring And Fuses - WEG CFW-11 Series User Manual

Installation and Connection

3.2.2 Power/Grounding Wiring and Fuses

ATTENTION!
Use proper cable lugs for the power and grounding connection cables.
ATTENTION!
Sensitive equipment such as PLCs, temperature controllers, and thermal couples shall be kept at a
minimum distance of 0.25 m (9.84 in) from the frequency inverter and from the cables that connect
the inverter to the motor.
DANGER!
Wrong cable connection:
- The inverter will be damaged if the power supply is connected to the output terminals (U/T1, V/T2,
or W/T3).
- Check all the connections before powering up the inverter.
3
- When replacing an existing inverter by a CFW-11, check if the installation and wiring is according
to the instructions listed in this manual.
DANGER!
Mauvaise connexion des câbles:
- Le variateur sera endommagé si l'alimentation d'entrée est connectée aux bornes de sortie (U/T1,
V/T2 ou W/T3).
- Vérifier toutes les connexions avant de mettre le variateur sous tension.
- En cas de remplacement d'un variateur existant par un CFW-11, vérifier si l'installation et le câblage
sont conformes aux instructions figurant dans ce manuel.
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.), RCD
nuisance trips may occur. Contact the RCD manufacturer for selecting the most appropriate device
to be used with inverters.
NOTE!
The wire gauges listed in
the maximum permitted voltage drop must be considered for the proper wiring sizing.
3-20 | CFW-11
Table 3.2 on page 3-21 are orientative values. Installation conditions and