Output Connections - WEG CFW501 User Manual

Procedure to use the dynamic braking:
Connect the brake resistor between the power terminals +Ud and BR.
„
Use a twisted cable for the connection. Separate these cables from the signal and
„
control wiring.
Dimension the cables according to the application, observing the maximum and
„
effective currents.
If the brake resistor is mounted within the cabinet of the inverter, consider its energy
„
when dimensioning the ventilation of the cabinet.
DANGER!
The internal braking circuit and the resistor may be damaged if the latter is
not properly dimensioned and/or if the voltage of the input power supply
exceeds the maximum value permitted. In order to avoid the destruction
of the resistor or risk of fire, the only guaranteed method is the inclusion
of a thermal relay in series with the resistor and/or a thermostat in contact
with its housing, connected in such a way to disconnect the input power
supply of the inverter in case of overload, as shown in
Set P0151 at maximum value when using dynamic braking.
„
The voltage level on the DC bus for activation of the dynamic braking is defined by
„
the parameter P0153 (level of the dynamic braking).
Refer to the CFW501 programming manual.
„

3.2.3.4 Output Connections

ATTENTION!
The inverter has an electronic motor overload protection that must be
„
adjusted according to the driven motor. When several motors are connected
to the same inverter, install individual overload relays for each motor.
The motor overload protection available on the CFW501 complies with
„
standard UL508C if the trip current (P0156) is set for at least 1.1 times
the motor rated current (P0401).
ATTENTION!
If a disconnect switch or a contactor is installed at the power supply
between the inverter and the motor, never operate it with the motor turning
or with voltage at the inverter output.
The characteristics of the cable used to connect the motor to the inverter, as well
as its interconnection and routing, are extremely important to avoid electromagnetic
interference in other equipment and not to affect the life cycle of windings and bearings
of the controlled motors.
Keep motor cables away from other cables (signal cables, sensor cables, control cables,
etc.), according to item
Connect a fourth cable between the motor ground and the inverter ground.
3.2.6 - Cable Separation
Installation and Connection
figure 3.2.
Distance.
CFW501 | 15