Technical FAQs

Ask a Question

What is the Ability of Micom Series 20 of type P127 for Voltage Controlled overcurrent protection function?

P127: Voltage Controlled Overcurrent (51V)

The 51V function in P127 is a combination of I>> and U< functions to inhibit trip when

normal generator current is already bigger than I>> threshold:

 Overcurrent function trip will be inhibited if current is bigger than I>> AND voltage

greather than U< (Generator ON => Live busbar).

 Overcurrent function will trip if current is bigger than I>> AND voltage smaller than

U< (Generator OFF => dead MV busbar).

Was this helpful?
What can we do to improve the information ?