Program features 81
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
.
must be set to
(in vector mode) or
parameter
(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.
Automatic restart
It is possible to restart the drive automatically after a short (max. 10 seconds) power
supply failure by using the Automatic restart function, provided that the drive is
allowed to run for 10 seconds without the cooling fans operating.
When enabled, the function takes the following actions upon a supply failure to a
successful restart:
• The undervoltage fault is suppressed (but a warning is generated).
• Modulation and cooling is stopped to conserve any remaining energy.
• DC circuit pre-charging is enabled.
If the DC voltage is restored before the expiration of the period defined by parameter
and the start signal is still on, normal operation will continue.
However, if the DC voltage remains too low at that point, the drive trips on a fault,
.
If parameter
is set to
, the drive never trips on the
undervoltage fault and the start signal is on forever. When he DC voltage is restored,
the normal operation continues.
WARNING!
Before you activate the function, make sure that no dangerous
situations can occur. The function restarts the drive automatically and
continues operation after a supply break.
Summary of Contents for ACQ580
Page 1: ...ABB drives for water Firmware manual ACQ580 pump control program ...
Page 4: ... 2017 ABB Oy All Rights Reserved 3AXD50000035867 Rev C EN EFFECTIVE 2017 06 21 ...
Page 30: ...26 Start up control with I O and ID run ...
Page 40: ...36 Default configuration ...
Page 304: ...300 Parameters ...
Page 340: ...336 Additional parameter data ...