Power Loss Ride-Through; Settings; Dc Magnetising; Maintenance Trigger - ABB ACS350 User Manual

Power loss ride-through

If the incoming supply voltage is cut off, the drive will continue to operate by utilising
the kinetic energy of the rotating motor. The drive will be fully operational as long as
the motor rotates and generates energy to the drive. The drive can continue the
operation after the break if the main contactor remained closed.
T
M
(N·m)
160
120
80
40
0
U
DC
T = Motor torque
M
Loss of supply voltage at nominal load (f
minimum limit. The controller keeps the voltage steady as long as the input power is switched off. The
drive runs the motor in generator mode. The motor speed falls but the drive is operational as long as
the motor has enough kinetic energy.

Settings

Parameter

DC Magnetising

When DC Magnetising is activated, the drive automatically magnetises the motor
before starting. This feature guarantees the highest possible breakaway torque, up
to 180% of motor nominal torque. By adjusting the premagnetising time, it is possible
to synchronise the motor start and e.g. a mechanical brake release. The Automatic
Start feature and DC Magnetising cannot be activated at the same time.
Settings
Parameters

Maintenance trigger

A maintenance trigger can be activated to show a notice on the panel display when
e.g. drive power consumption has exceeded the defined trigger point.
Settings
Parameter group
f U
out DC
(Hz)
(Vdc)
80 520
60 390
40 260
20 130
0 0
1.6
= Intermediate circuit voltage of the drive, f
2006 UNDERVOLT CTRL
2101 START FUNCTION and
29 MAINTENANCE TRIG
4.8 8 11.2
= output frequency of the drive,
out
= 40 Hz). The intermediate circuit DC voltage drops to the
out
2103 DC MAGN TIME
107
U
input power
U
DC
f
out
T
M
t (s)
14.4
Program features