protection of induction motor

1) under voltage- under voltage relay and under voltage relize are use for under voltage protection.

2) over load - over load relize , MCB, thermal over load relay, invers over current relay are use for over load protection.

3) phase and earth fault- HRC fuse and high set intertenious over current relay are use for phase and earth fault protection.

4) stooling - thermal relay and intertenious over current relay are use for stooling protection.

5) unbalance voltage - negative phase seqvance relay are use for unbalance voltage protection. 

6) singel phasing - thermal over load relay and single phasing preventer are use for single phasing protection. 

7) reverse phase seqvance - phase revasel protection are use for reverse phase seqvance protection. 

8) rotor fault- intertenious over current relay are use for rotor fault protection. 

9) switching surjis - RC surj modifier are use for switching surjis protection.


induction motor