ABB ACS280, Firmware Manual, Page: 70 / 430

70 Program features
Implementing the undervoltage control (power loss ride-through)
Implement the undervoltage control function as follows:
• Check that the undervoltage control function of the drive is enabled with
parameter
30.31 Undervoltage control
.
• Parameter
21.01 Start mode
must be set to
Automatic
(in vector mode) or
parameter 21.19 Scalar start mode to Automatic (in scalar mode) to make
flying start (starting into a rotating motor) possible.
If the installation is equipped with a main contactor, prevent its tripping at the
input power break. For example, use a time delay relay (hold) in the contactor
control circuit.
WARNING! Make sure that the flying restart of the motor will not cause
any danger. If you are in doubt, do not implement the undervoltage
control function.
 Voltage control and trip limits
The control and trip limits of the intermediate DC voltage regulator are relative
to the supply voltage as well as drive/inverter type. The DC voltage (
U
DC
) is
approximately 1.41 times the line-to-line supply voltage, and is displayed by
parameter
01.11 DC voltage
.
The following table shows the values of the selected DC voltage levels in volts.
Note that the absolute voltages vary according to drive/inverter type and AC
supply voltage range.
When adaptive voltage limit is enabled in parameter
95.02
:
DC voltage level [V] 95.01 Supply Voltage
See 95.01 Supply voltage .
AC supply voltage
range [V]
208…240
AC supply voltage
range [V]
380…415
AC supply
voltage range [V]
440…480
Automatic /
not used
Overvoltage fault limit 421 842 842 842
Overvoltage control limit 389 779 779 779
Internal brake chopper
start limit
389 760 760 760
Internal brake chopper
stop limit
379 745 745 745
Overvoltage warning limit 372 745 745 745
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×par
95.03
value
1)
0.85×1.41× par
95.03
value
1)
0.85×1.41×208
= 249
2)
0.85×1.41×380
= 455
2)
0.85×1.41×440
= 527
2)