Multiple Choice
Thermal overload relays are used to protect the motor against over current due to
A) short-circuits
B) heavy loads
C) grounds
D) all of the above
Correct Answer:
Verified
Correct Answer:
Verified
Q14: Circuit breakers usually operate under<br>A)transient state of
Q15: Thermal circuit breaker has<br>A)delayed trip action<br>B)instantaneous trip
Q16: Which of the following medium is employed
Q17: Magnetic circuit breaker has _ trip action.<br>A)delayed<br>B)instantaneous<br>C)both
Q18: A transmission line is protected by<br>A)inrush protection<br>B)distance
Q20: A thermal protection switch can protect against<br>A)short-circuit<br>B)temperature<br>C)overload<br>D)over
Q21: Burden of a protective relay is the
Q22: An efficient and a well designed protective
Q23: On which of the following routine tests
Q24: A differential relay measures the vector difference