Contents Of This Chapter - ABB ACS880-37 Hardware Manual

Resistor braking 235
15
Resistor braking

Contents of this chapter

This chapter tells how to select, protect and wire brake choppers and resistors. The
chapter also contains the related technical data.
Operating principle
The brake chopper handles the energy generated by a decelerating motor. The chopper
connects the brake resistor to the intermediate DC circuit whenever the voltage in the
circuit exceeds the limit defined by the control program. Energy consumption by the
resistor losses lowers the voltage until the resistor can be disconnected.