Implementing The Power-Loss Ride-Through Function; Cabinets With Line Contactor (Option +F250); Implementing The Control Of A Contactor Between Drive And Motor; Acs880 - ABB ACS880 Electrical Planning Instructions

32 Electrical planning guidelines
• ATEX-certified Safe disconnection function, Ex II (2) GD for ACS880 drives (+Q971)
Application guide (3AUA0000132231 [English]).
• FPTC-02 ATEX-certified thermistor protection module, Ex II (2) GD (option +L537+Q971)
for ACS880 drives user's manual (3AXD50000027782 [English]).
• CPTC-02 ATEX-certified thermistor protection module, Ex II (2) GD (option +L537+Q971)
user's manual (3AXD50000030058 [English]).

Implementing the Power-loss ride-through function

Implement the power-loss ride-through function as follows:
• Check that the power-loss ride-through function of the drive is enabled with parameter
30.31 Undervoltage control.
• For ACS580, ACH580 and ACQ580: Set parameter 21.01 Vector start mode 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 Power-loss ride-through function.
￭

Cabinets with line contactor (option +F250)

The main contactor of the drive opens in a power-loss situation. When the power returns,
the contactor closes. However, if the power-loss situation lasts so long that the drive trips
on undervoltage, it must be reset and started again to continue operation. If the power-loss
situation lasts so long that the buffering module (C22) empties, the main contactor remains
open and the drive operates only after reset and a new start.
With external uninterruptible control voltage (option +G307), the main contactor remains
closed in power-loss situations. If the power-loss situatio lasts solong that the drive trips on
undervoltage, it must be reset and started again to continue operation.
Implementing the control of a contactor between drive and
motor
The control of the output contactor depends on how you use the drive, that is, which motor
control mode and which motor stop mode you select.
￭

ACS880

When you select the DTC motor control mode and the motor ramp stop mode, use this
operation sequence to open the contactor:
1. Give a stop command to the drive.
2. Wait until the drive decelerates the motor to zero speed.
3. Open the contactor.
When you select the DTC motor control mode and the motor coast stop, or scalar control
mode, open the contactor as follows:
1. Give a stop command to the drive.
2. Open the contactor.