Power System Protection MCQs Part 22
Contents
- 1 Buchholz relays are used for transformers having ratings above
- 2 The condition which causes transient instability in power system
- 3 The primary type of failure in wind power generation is in
- 4 Differential relays are installed for protecting equipment against
- 5 The value of the reheat factor is of the order of
Buchholz relays are used for transformers having ratings above
Buchholz relays are used for transformers having ratings above:
- 100 kV
- 200 kV
- 500 kV
- 1000 kV
Correct answer: 3. 500 kV
The condition which causes transient instability in power system
The condition which causes transient instability in power system:
- Loss of excitation in generator
- Short circuit
- Switching operations on line
- All of these
Correct answer: 4. All of these
The primary type of failure in wind power generation is in
The primary type of failure in wind power generation is in:
- Aerodynamic system
- Electrical system
- Mechanical system
- Both 2 and 3
Correct answer: 1. Aerodynamic system
Differential relays are installed for protecting equipment against
Differential relays are installed for protecting equipment against:
- Overcurrent
- Reverse current
- Internal faults
- No voltage
Correct answer: 3. Internal faults
The value of the reheat factor is of the order of
The value of the reheat factor is of the order of
- 0.8 to 1.0
- 1.0 to 1.05
- 1.1 to 1.5
- 1.5 to 10
Correct answer: 3. 1.1 to 1.5