Operation Sequence; Maintenance To Vfd; Maintenance To Bypass; Vfd To Bypass - ABB ACS580MV Hardware Manual

Operation sequence



Maintenance to VFD

•
Check all the enclosures of drive and bypass unit are properly closed and VFD is
ready for operation
•
Unlock the mode selection switch
•
Set the mode selection switch to "Unlock position"
•
Close QS1
•
Close QS2
•
Set the mode selection switch to "Working position"
•
Lock the mode selection switch
•
Close QF1.

Maintenance to Bypass

•
Check all the enclosures of bypass unit are properly closed and ready for operation
•
Unlock the mode selection switch
•
Set the mode selection switch to "Unlock position"
•
Close QS3
•
Set the mode selection switch to "Working position"
•
Lock the mode selection switch
•
Close QF1.

VFD to Bypass

•
Open QF1
•
Unlock the mode selection switch
•
Set the mode selection switch to "Unlock position"
•
Open QS2
•
Open QS1
•
Wait for at least 3 x rotor time constant (if not available, wait for longer than 5s)
•
Close QS3
•
Set the switch to "Working position"
•
Lock the mode selection switch
•
Close QF1.
Operation principle and hardware description 21