ABB ACH550-01 User Manual page 329

Code Description
3
Mains 3~
3
ACH550
Inlet pipe
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
• 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.
• Thus, the PFA Start Delay must be longer than the time setting of the
star-delta starter.
324
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Contactors
3
P1
P2
P3
A
Cooling water
Sewage
tank tank
Parameter listing and descriptions
ACH550-01 User's Manual
Range
3
M
3
3~
3
P1
Outlet pipe 1
M
3~
Outlet pipe 2
P2
M
3~
P3 Outlet pipe 3
0...10 s
.
START DELAY