Identification Of The Power Terminals And Grounding Points; Power And Grounding Wiring, Circuit Breakers And Fuses - WEG CFW500 Serie Manual Del Usuario

Installation and Connection
ATTENTION!
Integral solid state short circuit protection does not provide branch
„
circuit protection. Branch circuit protection must be provided in
accordance with applicable local codes.

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 and L3 (R, S, T): AC power supply. Some models of voltage 200-240 V
„
(see option of models in
phase inverters) without derating of the rated current. In this case, the AC power
supply can be connected to two of the three input terminals without distinction. For
the single-phase models only, the power voltage must be connected to L/L1 and N/L2.
U, V, W: connection for the motor.
„
-UD: negative pole of the voltage of the DC bus.
„
BR: connection of the brake resistor.
„
+UD: positive pole of the voltage of the DC bus.
„
The maximum torque of the power terminals and grounding points must be checked
in figure B.3.

3.2.2 Power and Grounding Wiring, Circuit Breakers and Fuses

ATTENTION!
Use proper cable lugs for the power and grounding connection cables.
„
Refer to
Keep sensitive equipment and wiring at a minimum distance of 0.25 m
„
from the inverter and from the cables connecting the inverter to the motor.
It is not recommended the use of mini circuit breakers (MDU), because
„
of the actuation level of the magnet.
NOTE!
The wire gauges listed in
„
conditions and the maximum permitted voltage drop must be
considered for the proper wiring sizing.
In order to meet UL requirements, use ultra fast fuses at the inverter
„
supply with a current not higher than the values presented in
10 | CFW500
figure B.3. The location of the power, grounding and
figure A.3.
table B.1) can operate in 2 or 3 phases (single-phase/three-
table B.1 for recommended wiring, circuit breakers and fuses.
table B.1 are orientative values. Installation
- English -
table B.1.