Resistor Braking; What This Chapter Contains; To Which Products This Chapter Applies; Availability Of Brake Choppers And Resistors For The Acs800 - ABB ACS800 Hardware Manual

Resistor Braking

What this Chapter Contains

This chapter describes how to select, protect and wire brake choppers and resistors.
The chapter also contains the technical data.

To Which Products this Chapter Applies

This chapter applies to the ACS800-01/U1 (frame sizes R2 to R6), ACS800-02/U2
(frame sizes R7 and R8), ACS800-04/U4 (frame sizes R7 and R8), ACS800-07/U7
(frame sizes R6, R7 and R8), and ACS800-PC.

Availability of Brake Choppers and Resistors for the ACS800

Frame R2 and R3 drives have a built-in brake chopper as standard equipment. For
frames R4 and up, brake choppers are optionally available as built-in units, indicated
in the type code by +D150.
Resistors are available as add-on kits.

How to Select the Correct Drive/Chopper/Resistor Combination

1. Calculate the maximum power (P
2. Select a suitable drive / brake chopper / brake resistor combination for the
application according to the following tables (take account of other factors in the
drive selection also).
Note: A resistor other than the standard resistor can be used provided that:
• Its resistance is not lower than the resistance of the standard resistor.
WARNING! Never use a brake resistor with a resistance below the value specified
for the particular drive / brake chopper / resistor combination. The drive and the
chopper are not able to handle the overcurrent caused by the low resistance.
) generated by the motor during braking.
max
95
Resistor Braking