ABB ACS 400 User Manual page 124

Code Description
8122 PFC START DELAY
Sets the start delay for all the motors in the system. The delay works as follows:
1. The contactor that connects the speed regulated motor to ACS 400 is switched on (by a ACS 400 relay
output).
2. PFC Start Delay is waited.
3. Speed regulated motor is energised and normal PFC operation starts. Auxiliary motors are started.
Caution! There should always be PFC Start Delay set if the motors are equipped with star-delta starters.
The PFC Start Delay must be set longer than the time setting of the star-delta starter: After the motor is
switched on by the relay output of the ACS 400 there must be enough time for the star-delta starter to first
switch to star-connection and then back to delta-connection before the ACS 400 inverter starts switching.
114 ACS 400 User's Manual