WEG CFW700 - Power Connections; Input Connections

CFW700 | 15
Installation and Connection
English
 Optionally, slow blow fuses can be used at the input. They shall be sized for 1.2 x the rated
input current of the inverter. 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.
3.2.3 Power Connections
Shielding
PE
Disconnect
switch
Fuses
R
S
T
Power
supply
PE W V U
PE R S T U V W PE
Figure 3.2: Power and grounding connections
 The switch-disconnector is not necessary if the inverter has the DS optional item (with
switch-disconnector).
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).
ATTENTION!
The power supply that feeds the inverter shall have a solid grounded neutral.
In case of IT networks, follow the instructions described below.