Synch check
Synch check
(OP)
In case when line is energize but bus is dead..whether synch check will be completed with dead bus and live line ?
Do CB closes in this condition?
Do CB closes in this condition?
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RE: Synch check
RE: Synch check
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If we learn from our mistakes I'm getting a great education!
RE: Synch check
In case of voltagecheck ( live-dead or dead-dead) as Scotty saied you have check additional criterions as :
1. MCB (fuses) OK
2. All other feedeng breakers are opened.
Best Regards.
Slava
RE: Synch check
RE: Synch check
Newer synchrocheck relays are include voltagecheck option too.
Usually is include some binary input: dead bus (DB)release.
Possible add to this contact any logic.
In case of protection operated, latch contact add directly (in series) to the close coil. Ofcourse in case of autoreclosere functionality only afterfinally trip.
Best Regards.
Slava
RE: Synch check
You can choose - if it is request of Grid department, than through Sync logic - close CB when:
DL-DB
DL-LB
LL-DB
LL-LB (volt, angle, freq condition - are in setting region)
(AND if no VT MCB trip, interlock, voltage not in DEAD zone - conditions are fulfilled)