
Resistor braking 211
14
Resistor braking
What this chapter contains
This chapter describes how to select, protect and wire brake choppers and resistors.
The chapter also contains technical data.
Operation principle and hardware description
Frames R1 to R4 have a built-in brake chopper as standard. Frames R5 and up can
be equipped with optional built-in brake chopper (+D150). Brake resistors are
available as add-on kits.
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.
Planning the braking system
Selecting the brake circuit components
1. Calculate the maximum power generated by the motor during braking (
P
max
).
2. Select a suitable drive, brake chopper and brake resistor combination for the
application from the rating table on page
. The braking power of the chopper
must be greater or equal than the maximum power generated by the motor during
the braking.
ACS880-01 HW.book Page 211 Monday, July 1, 2013 4:51 PM
Summary of Contents for ACS880-01 Series
Page 4: ...ACS880 01 HW book Page 4 Monday July 1 2013 4 51 PM...
Page 12: ...12 ACS880 01 HW book Page 12 Monday July 1 2013 4 51 PM...
Page 20: ...20 Safety instructions ACS880 01 HW book Page 20 Monday July 1 2013 4 51 PM...
Page 26: ...26 Introduction to the manual ACS880 01 HW book Page 26 Monday July 1 2013 4 51 PM...
Page 80: ...80 Planning the electrical installation ACS880 01 HW book Page 80 Monday July 1 2013 4 51 PM...
Page 96: ...96 Electrical installation 8b R8 R9 ACS880 01 HW book Page 96 Monday July 1 2013 4 51 PM...
Page 98: ...98 Electrical installation 16 13 R8 R9 ACS880 01 HW book Page 98 Monday July 1 2013 4 51 PM...
Page 118: ...118 Start up ACS880 01 HW book Page 118 Monday July 1 2013 4 51 PM...
Page 120: ...120 Fault tracing ACS880 01 HW book Page 120 Monday July 1 2013 4 51 PM...
Page 131: ...Maintenance 131 3 4 5 3 ACS880 01 HW book Page 131 Monday July 1 2013 4 51 PM...
Page 172: ...172 Technical data ACS880 01 HW book Page 172 Monday July 1 2013 4 51 PM...
Page 196: ...196 Dimension drawings ACS880 01 HW book Page 196 Monday July 1 2013 4 51 PM...
Page 209: ...Safe Torque off function 209 Certificate ACS880 01 HW book Page 209 Monday July 1 2013 4 51 PM...
Page 210: ...210 Safe Torque off function ACS880 01 HW book Page 210 Monday July 1 2013 4 51 PM...
Page 220: ...220 Resistor braking ACS880 01 HW book Page 220 Monday July 1 2013 4 51 PM...