ABB ACH550 User Manual Page 315

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Parameter listing and descriptions 311
ACH550 User's Manual
8122 PFA START DELAY
Sets the start delay for speed regulated motors in the system. Using
the delay, the drive works as follows:
Switches on the contactor of the speed regulated motor –
connecting the motor to the ACH550 power output.
Delays motor start for the time 8122 PFA
START DELAY.
Starts the speed regulated motor.
Starts auxiliary motors. See parameter 8115 for delay.
Warning! Motors equipped with star-delta starters require a
PFA Start Delay.
After the ACH550 relay output switches a motor On, the star-delta
starter must switch to the star-connection and then back to the
delta-connection before the drive applies power.
So, the PFA Start Delay must be longer than the time setting of
the star-delta starter.
Code Description Range
M
3~
M
3~
M
3~
Outlet Pipe3
Outlet Pipe2
Outlet Pipe1
P1
P2
P3
Sewage
Tank
Contactors
P1
P2
P3
Mains 3~
3
3
3
3
ACH550
3
3
Inlet Pipe
A
00Template.book Page 311 Friday, January 2, 2004 2:55 PM
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