Overheating of relay contacts or contact born out is due to
A) slow making and breaking of load circuit contacts
B) foreign matter on the contact surface
C) too low contact pressure
D) all of the above
Correct Answer:
Verified
Q3: When a transmission line is energized, the
Q4: Protective relays are devices that detect abnormal
Q5: The voltage appearing across the contacts after
Q6: Ionization in circuit breaker is facilitated by
A)high
Q7: In a circuit breaker the basic problem
Q9: Interruption of large currents by relay requires
A)arc
Q10: Shunt capacitance is neglected while considering
A)short transmission
Q11: The arc voltage produced in A.C. circuit
Q12: The time of closing the cycle, in
Q13: Insulation resistance of high voltage circuit breakers
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