WEG CFW-11 User Manual page 32

DANGER!
Wrong 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.
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.), 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
the maximum permitted voltage drop must be considered for the proper wiring sizing.
Input fuses:
The fuse to be used in the input must be of the UF type (Ultra-Fast) with I²t equal to or smaller than the
specified in Table 3.2 on page 3-14
protect the input rectifier diodes of the inverter and wiring.
In order to meet UL requirements, use fuses at the inverter supply with a current not higher than the values
of Table 3.3 on page 3-18.
Optionally, slow blow fuses can be used at the input they must be sized for 1.2 x the inverter rated input
current. In this case, the installation is protected against short-circuit, but not the inverter input rectifier. This
may result in major damage to the inverter in the event of an internal component failure.
Table 3.2 on page 3-14 are orientative values. Installation conditions and
(consider the cold current extinction value (not the melting value) to
Installation and Connection
CFW-11 | 3-13
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