Start Sequence - Danfoss Vacon NXP Applications Manual

12 · vacon
NOTE! UPS may be needed during short circuit situation to keep MCB closed if control voltage is
taken from the grid where the short circuit occurs.
1.8

Start Sequence

1
Start
Ready to switch
on
Charge
DC-Link
NO
DC-Link
> 85 %
YES
Close Main
Contactor
NO
Main Contactor
Closed
Run Enable
NO
YES
Ready To Run
Start Signal
NO
YES
Synchronize with
mains
NO
Synch OK
YES
Running
Figure 7. AFE start sequence
Fault
Reset
MCC Fault
Line Synch Fault
F10
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