Answer / dharmendra mathur

If an electric motor contineous run. So motor will become
hot. So various safety devise are available for tripping an
overheated motor before it become damage or burnt from
excess heat.

Answer / srinivasa chary

Thermal relay is used in DOL starter to protect the machine
from excessive current when it is over loded...esspecially
incase of low HP motors.

. Why the transmission lines are in 11kV, 22kV, 33kv, and why not 10kV, 20kV, 30kV?

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