ABB ACS580 - Brake Chopper

124 Program features
The following table shows the values of selected DC voltage levels. Note that the
absolute voltages vary according to the drive/inverter type and AC supply voltage
range.
Settings
Parameters 01.11 DC voltage (page 147), 30.30 Overvoltage control (page 241),
30.31 Undervoltage control (page 242), 95.01 Supply voltage (page 324) and 95.02
Adaptive voltage limits (page 324).
 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.
DC voltage level [V]
See 95.01 Supply voltage.
AC supply voltage range [V]
380…415
AC supply voltage range [V]
440…480
Overvoltage fault limit 840 840
Overvoltage control limit 780 780
Internal brake chopper start limit 780 780
Internal brake chopper stop limit 760 760
Overvoltage warning limit 745 745
Undervoltage warning limit 0.85×1.41×par 95.03 value
1)
0.85×1.41×par 95.03 value
1)
0.85×1.41×380 = 455
2)
0.85×1.41×440 = 527
2)
Undervoltage control limit 0.75×1.41×par 95.03 value
1)
0.75×1.41×par 95.03 value
1)
0.75×1.41×380 = 402
2)
0.75×1.41×440 = 465
2)
Charging relay closing limit 0.75×1.41×par 95.03 value
1)
0.75×1.41×par 95.03 value
1)
0.75×1.41×380 = 402
2)
0.75×1.41×440 = 465
2)
Charging relay opening limit 0.65×1.41×par 95.03 value
1)
0.65×1.41 ×par 95.03 value
1)
0.65×1.41×380 = 348
2)
0.65×1.41×440 = 403
2)
DC voltage at upper bound of supply
voltage range (U
DCmax
)
560 648
DC voltage at lower bound of supply
voltage range (U
DCmin
)
513 594
Charging activation/standby limit
3)
0.65×1.41×par 95.03 value
1)
0.65×1.41×par 95.03 value
1)
0.65×1.41×380 = 348
2)
0.65×1.41×440 = 403
2)
Undervoltage fault limit 0.45×1.41×par 95.03 value
1)
0.45×1.41×par 95.03 value
1)
0.45×1.41×380 = 241
2)
0.45×1.41×440 = 279
2)
1)
If parameter 95.01 Supply voltage is set to Automatic / not selected and 95.02 Adaptive voltage limits is
set to Enable, the value of parameter 95.03 Estimated AC supply voltage is used,
2)
otherwise the lower limit of the range selected with parameter 95.01 Supply voltage is used.
3)
When standby is activated, drive modulation is stopped, the fan is stopped and the pre-charge circuit is
activated. If the voltage exceeds this level again, the drive has to complete charging before it will
automatically continue operation.
ACS580 FW.book Page 124 Wednesday, September 21, 2016 9:48 PM