ABB ACS880-04XT User Manual

114 Program features
Settings
Parameters 01.11 DC voltage (page 152), 30.30 Overvoltage control (page 300),
30.31 Undervoltage control (page 300), 95.01 Supply voltage (page 473), and 95.02
Adaptive voltage limits (page 474).
 Brake chopper
A brake chopper can be used to handle the energy generated by a decelerating
motor. When the DC voltage rises high enough, the chopper connects the DC circuit
to an external brake resistor. The chopper operates on the pulse width modulation
principle.
The internal brake choppers of ACS880 drives start conducting when the DC link
voltage reaches 1.156 × U
DCmax
. 100% pulse width is reached at approximately 1.2 ×
U
DCmax
, depending on supply voltage range – see table under Voltage control and
trip limits above. (U
DCmax
is the DC voltage corresponding to the maximum of the AC
supply voltage range.) For information on external brake choppers, refer to their
documentation.
Note: For runtime braking, overvoltage control (parameter 30.30 Overvoltage control)
needs to be disabled for the chopper to operate.
Settings
Parameters 01.11 DC voltage (page 152) and 30.30 Overvoltage control (page 300);
parameter group 43 Brake chopper (page 355).
Supply voltage range [V AC] (see 95.01 Supply voltage)
Level [V DC (% of U
DCmax
)] 208…240 380…415 440…480 500 525…600 660…690
Overvoltage fault limit 489/440* 800 878 880 1113 1218
Overvoltage control limit 405 (125) 700 (125) 810 (125) 810 (120) 1013 (125) 1167 (125)
Internal brake chopper at 100%
pulse width
403 (124) 697 (124) 806 (124) 806 (119) 1008 (124) 1159 (124)
Internal brake chopper at 0%
pulse width
375 (116) 648 (116) 749 (116) 780 (116) 936 (116) 1077 (116)
Overvoltage warning limit 373 (115) 644 (115) 745 (115) 776 (115) 932 (115) 1071 (115)
U
DCmax
= DC voltage at upper
bound of supply voltage range
324 (100) 560 (100) 648 (100) 675 (100) 810 (100) 932 (100)
DC voltage at lower bound of
supply voltage range
281 513 594 675 709 891
Undervoltage control and
warning limit
239 (85) 436 (85) 505 (85) 574 (85) 602 (85) 757 (85)
Charging activation/standby
limit
225 (80) 410 (80) 475 (80) 540 (80) 567 (80) 713 (80)
Undervoltage fault limit 168 (60) 308 (60) 356 (60) 405 (60) 425 (60) 535 (60)
*489 V with frames R1…R3, 440 V with frames R4…R8.

ABB ACS880-04XT Specifications

General

Brand	ABB
Model	ACS880-04XT
Category	Controller
Language	English