Power Supply Capacity; Dynamic Braking (Standard Built-In For Frame Sizes A, B, C And D And Optional Built-In For Frame Size E - Cfw701 - WEG CFW701 User Manual

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!
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 CFW701 with built-in C3 RFI filter (CFW701...
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
sizes A, B, C and D and changing the position of the J1 jumper on the PRT1
board from
for inverter frame size E.

3.2.3.2 Power Supply Capacity

Suitable for circuits with capacity to deliver no more than:
100 kA symmetric at 240 V, 480 V or 600 V when the inverter is protected by fuses.
„
65 kA symmetric at 240 V or 480 V when the inverter is protected by reverse-type circuit
„
breakers.
14 kA symmetric at 600 V when the inverter is protected by reverse-type circuit breakers.
„
For compliance with UL standard and specification of current of fuses and circuit breaker see
Table B.1 on page 151
In case the CFW701 is installed in power supplies with current capacity higher than 100.000 A
is necessary to provide adequate protections circuits such as fuses or switches.
3.2.3.3 Dynamic Braking (standard built-in for frame sizes A, B, C and D and
optional built-in for frame size E - CFW701...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.
„
(XE1) to "NC" (XIT), according to the
to Table B.3 on page 153.
151, Table B.2 on page 152
Installation and Connection
Figure A.6 on page 145
Figure A.6 on page 145
and Table B.3 on page 153
for inverter frame
, it
rms
for
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