For an arcing fault where the arc resistance is significant an impedance or admittance relay will
Kick fuses are used across relay coils to prevent relay operation during
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There is a problem of high transient over voltages while interrupting
The most suitable circuit breaker for voltages above 220 kV is
Match List-I with List-ll and select the correct answer using the codes given below the lists:
List-I
A. Mho relay
B. Reactance relay
C. Simple impedance relay
List-ll
1. Voltage restrained OC relay
2. Direction restrained OC relay
3. Voltage restrained directional relay
Pilot relaying schemes are used for protection of
Relays A and B have to be coordinated on two adjacent line sections as shown in figure below. Zone-1 and Zone-2 settings are indicated on the diagram.
Which of the following indicates correct time setting for zone-2 of relays A and B?
Identify the relays to be provided with directional and non-directional elements in the system shown in figure below.
If the fault current is 2000 A, the.relay setting 50% and the CT ratio is 400/5, then the plug setting multiplier will be
The percent bias for a generator protection lies between
25 docs|247 tests
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25 docs|247 tests
|