Identification Of The Power Terminals And Grounding Points; Circuit Breakers, Fuses, Grounding And Power Cables - WEG CFW300 Manual Del Usuario

Installation and Connection

3.2.1 Identification of the Power Terminals and Grounding Points

The power terminals can be of different sizes and configurations, depending on the model of
the inverter, according to
control connections are shown in
Description of the power terminals:
L/L1, N/L2, L3 (R,S,T): power supply connection.
„
U, V and W: connection for the motor.
„
-UD: negative pole of the DC power supply.
„
+UD: positive pole of the DC power supply.
„
+BR, BR: connection of the braking resistor (available for DB models).
„
PE: grounding connection.
„
The maximum tightening torque of the power terminals and grounding points must be checked
in Figure B3 on page 144.
DANGER!
Observe the correct DC power supply connection, polarity and terminal positions.
„
DANGER!
Observer la bonne connexion de l'alimentation en courant continu, la polarité
„
et l'emplacement des bornes.

3.2.2 Circuit Breakers, Fuses, Grounding and Power Cables

ATTENTION!
Use proper cable lugs for the power and grounding connection cables. Refer to
„
Table B1 on page 128
Table B3 on page 133
Keep sensitive equipment and wiring at a minimum distance of 0.25 m (9.85
„
in) from the inverter and from the cables connecting the inverter to the motor.
ATTENTION!
Residual Current Device (RCD):
When used in the inverter supply, it must have a pick-up current of 300 mA.
„
Depending on the installation conditions, such as motor cable length and
„
type, multi-motor drive, etc., the RCD interrupter may trip. Check with the
manufacturer the most suitable type for operation with inverters.
14 | CFW300
Figure B3 on page 144. The location of the power, grounding and
Figure B3 on page
for recommended wiring, and
for recommended circuit breakers and fuses.
144.
Table B2 on page 130 and