Q.

Thermal relays are used for protection of motors against over-current owing to

  • AShort circuits
  • BHeavy loads
  • CEarth fault 
  • DAll of these 
Correct Answer : (B)

Heavy loads

Hints :
Previous

The most serious consequence of a major uncleared short-circuit fault could be

Next

Which of the following results in a symmetrical fault?

Join The Discussion