Electrical Engineering MCQs on Power System Protection
Power System Protection MCQs Part 24
Contents
- 1 The arc voltage produced in an AC circuit breaker is always
- 2 Capacitance voltage transformer is used to
- 3 Merz price current scheme protection is used for protection of
- 4 For which of the below mentioned protection from negative sequence currents is provided
- 5 The relay that is preferred for phase fault on short transmission line
The arc voltage produced in an AC circuit breaker is always
The arc voltage produced in an AC circuit breaker is always
- In phase with the arc current
- In phase opposition with the arc current
- Lagging the arc current by 90°
- Leading the arc current by 90°
Correct answer: 1. In phase with the arc current
Capacitance voltage transformer is used to
Capacitance voltage transformer is used to
- Connect instruments on the LT side
- Improve the power factor of the transmission
- Reduce losses in power transmission line
- None of these
Correct answer: 2. Improve the power factor of the transmission
Merz price current scheme protection is used for protection of
Merz price current scheme protection is used for protection of
- Transformer
- Alternator
- Both of these
- Bus bars only
Explanation: Merz price current scheme protection is a differential protection scheme that is used in transformer and alternators for providing protection.
For which of the below mentioned protection from negative sequence currents is provided
For which of the below mentioned protection from negative sequence currents is provided
- Generators
- Motors
- Transformers
- Transmission line
Correct answer: 1. Generators
The relay that is preferred for phase fault on short transmission line
The relay that is preferred for phase fault on short transmission line
- Impedance
- Induction type
- Reactance
- None of these
Correct answer: 3. Reactance