Start-Up - ABB ACS355 series User Manual

Appendix: Resistor braking 409

Start-up

Note: When the brake resistor is used for the first time, it is possible that some smoke
appears as the protective oil or lacquer on the resistor burns off. Therefore it is
important to have adequate ventilation when the brake resistor is used for the first
time.
To enable resistor braking, switch off the drive's overvoltage control by setting
parameter 2005 OVERVOLT CTRL to 0 (DISABLE). If parameter 2005 OVERVOLT
CTRL is set to 2 (EN WITH BRCH) both braking chopper and overvoltage controller
are enabled so that the braking chopper capability is used to its maximum and the
overvoltage controller is activated above that.