Input Connections; Dynamic Braking (Standard Built-In For Frame Sizes A, B, C And D And Optional Built-In For Frame Size E - Cfw700 - Weq CFW700 Serie Manual Del Usuario

Installation and Connection
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.
ATTENTION!
In order to be able to use the CFW700 with built-in C3 RFI filter (frame sizes A, B, C
and D with optional RFI filter and all frame size E inverter models – CFW700...C3...)
in IT networks (neutral conductor not grounded or grounded via a high ohmic value
resistor) or in corner-grounded delta systems, it is necessary to remove some RFI
filter components (capacitor for frame sizes A, B, C and D and capacitor and the
MOV for frame size E) connected to the ground by removing the screws indicated
in Figure A.8 on page 203
position of the J1 jumper on the PRT1 board from
to the Figure A.8 on page 203
AC power supply considerations
Suitable for use on a circuit capable of delivering not more than 100.000 A
„
Ampères at 240 V, 480 V or 600 V maximum, when protected by Class J fuses (for 240 V
and 480 V models) or special purpose fuses (for 600 V).
3.2.3.2 Dynamic Braking (standard built-in for frame sizes A, B, C and D and
optional built-in for frame size E - CFW700...DB...)
Refer to Table B.1 on page
the following dynamic braking specifications: maximum current, resistance, RMS current (*)
and cable gauges.
The power rating of the dynamic braking resistor is a function of the deceleration time, the load
inertia and the resistant torque.
Dynamic braking installing procedure:
Install the braking resistor between the power terminals DC+ and BR.
„
Use twisted cable for the connection. Separate these cables from the signal and control
„
cables.
14 | CFW700
for inverter frame sizes A, B, C and D and changing the
for inverter frame size E.
206, Table B.2 on page 207
(XE1) to "NC" (XIT), according
symmetrical
rms
and Table B.3 on page 208 for