Answer Posted / eashwar
LBB RELAYS ARE LOCAL BREAKER BACKUP RELAYS.THEY ARE USED TO
PROTECT THE CIRCUIT BREAKER .THE CONTACTS OF THE LBB RELAYS
GETS ENERGISED WHEN THE UPSTREAM OR DOWNSTREAM BREAKER GETS
TRIPPED ,AND THE MAIN BREAKER GETS TRIPPED.
| Is This Answer Correct ? | 13 Yes | 27 No |
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