Switchgear protections questions with answers
93 multiple-choice questions. Open any question for its answer and explanation.
- An isolator is installed
- With which of the following, a circuit breaker must be equipped for remote operation ?
- Burden of a protective relay is the power
- Relays are used for phase faults on long line.
- Shunt capacitance is neglected while considering
- Series reactors should have
- Over voltage protection is recommended for
- Large internal faults are protected by
- The line insulation is the insulation level of the station equipment.
- Fault diverters are basically
- Discrimination between main and back up protection is provided by the use of relays which are
- The delay fuses are used for the protection of ________ .
- Overload relays are of type.
- A fuse is connected
- The voltage appearing across the contacts after opening of the circuit breaker is called______voltage.
- Induction cup relay is operated due to changes in
- SF6 gas
- Circuit breakers are essentially
- Wave trap is used to trap waves of
- Protection by fuses is generally not used beyond
- To reduce short circuit fault currents are used.
- A differential relay measures the vector difference between
- The single phasing relays are used for the protection of
- Insulation resistance of high voltage circuit breakers is more than
- The material used for fuse must have