1. Long transmission line
2. medium transmission line
3. short length line
4. no length criterion
Long transmission line
1. 0.15 p.u
2. 0.2 p.u
3. 0.3 p.u
4. 2.4 p.u
0.15 p.u
1. 1.0
2. 0.75
3. none of these
4. 0.99
0.99
1. Voltage restrained directional relay
2. Directional restrained over current relay
3. Voltage restrained over current relay
4. None of these
Directional restrained over current relay
1. Non-directional relays at the source end and directional relays at the load end
2. Non-directional relays at both the ends
3. Directional relays at the source end and non directional at the load end
4. Directional relays at both ends
Non-directional relays at the source end and directional relays at the load end
1. Much less than any circuit breaker
2. Much more than any circuit breaker
3. Equal to the circuit breaker
4. None of these
Much less than any circuit breaker
1. High vapour pressure and low conductivity properties
2. High vapour pressure and high conductivity properties
3. Low vapour pressure and high conductivity properties
4. Low vapour pressure and low conductivity properties
Low vapour pressure and low conductivity properties
1. air blast circuit breaker
2. vaccum circuit breaker
3. oil circuit breaker
4. any one of these
vaccum circuit breaker
1. High pressure and low velocity
2. High pressure and high velocity
3. Low pressure and low velocity
4. Low pressure and high velocity
Low pressure and low velocity
1. Air blast circuit breaker
2. M.O circuit breaker
3. SF6 circuit breaker
4. None of these
SF6 circuit breaker