Installation - WEG CFW-10 EASYDRIVE User Manual

CHAPTER 8 - OPTIONS AND ACCESSORIES

8.4.2 Installation

Input power
88
Connect the braking resistor between the +UD and BR
power terminals (Refer to Section 3.2.1);
Make this connection with a twisted pair. Run this cable
separately from any signal or control wire. Size the cable
cross section according to the application, considering the
maximum and RMS current;
If the braking resistor is installed inside the inverter panel,
the additional heat dissipated by the resistor shall be
considered when defining the panel ventilation.
DANGER!
The internal braking circuitry of the inverter as well as the
braking resistor may be damaged if they are not properly sized
and/or if the input power supply exceeds the maximum
admissible value. In this case, the only guaranteed method to
avoid burning the resistor and to eliminate the risk of fire is
the installation of a thermal overload relay in series with the
resistor and/or the installation of a thermostat on the resistor
body, wiring it in a way to disconnect the inverter power supply
in case of overload, as shown below:
Contactor
supply
Thermal
Relay
Control
Voltage
Thermostat
Figure 8.4 -Braking resistor connection (only for the models
7,3A/200-240V and 4,0A/110-127V)
L/L1
N/L2
BR +UD
Braking
Resistor
U
V Motor
W