Input Connections - WEG CFW-11 User Manual

Installation and Connection

3.2.3.1 Input Connections

DANGER!
Provide a disconnect device for the input power supply of the inverter.
This device shall disconnect the input power supply for the inverter when needed (for instance, during
servicing).
DANGER!
Montez un dispositif de coupure sur l'alimentation du variateur.
Ce composant déconnecte l'alimentation du variateur si cela est nécessaire (ex. pendant l'entretien
et la maintenance).
ATTENTION!
A contactor or another device that frequently disconnects and reapplies the AC supply to the inverter,
in order to start and stop the motor, may cause damage to the inverter power section. The drive
3
is designed to use control signals for starting and stopping the motor. If used for that purpose, the
input device must not exceed one operation per minute; otherwise, the inverter may be damaged.
ATTENTION!
The power supply that feeds the inverter must have a grounded neutral. In case of IT networks, follow
the instructions described in Item 3.2.3.1.2 IT Networks on page 3-22.
NOTE!
The input power supply voltage must be compatible with the inverter rated voltage.
NOTE!
Power factor correction capacitors are not needed at the inverter input (R, S, T) and must not be
installed at the output (U, V, W).
NOTE!
For models with special DC hardware an external pre-charge circuit must be provided. For further
information, refer to the manufacturer.
CFW-11 | 3-21