WEG CFW-11 Series User Manual page 31

Installation and Connection
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.
3
NOTE!
The wire gauges listed in the table 3.2 are orientative values. Installation conditions and the maximum
permitted voltage drop must be considered for the proper wiring sizing.
Input fuses
Use High Speed Fuses at the input for the protection of the inverter rectifier and wiring. Refer to table 3.2
for selecting the appropriate fuse rating (I
the cold (and not the fusion) current extinction value).
In order to meet UL requirements, use class J fuses at the inverter supply with a current not higher than the
values of table 3.2.
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.
3-10
2 t must be equal to or less than indicated in table 3.2, consider