Distance Relay | Distance Relay Objective Type Questions and answers

11.  Distance relays are generally

   A. Split phase relays

   B. Reactance relays

   C. Impedance relays

   D. None of the above

12.  Three step time distance characteristic of distance relay can be had by

   A. Changing taps on voltage transformer

   B. Separate measuring elements for zones 2 and 3

   C. Switching resistance in relay restrain circuit at pre-set time interval by means of a timer element

   D. Any of the above

13.  Distance protection scheme is preferred over graded lime-lag over-current protection in HV and EHV lines because

   A. It is faster in operation

   B. It is simple

   C. It is cheaper in cost

   D. All of the above

14.  In a three-step distance protection the reach of the three zones of the relay at the beginning of the first line typically extends into

   A. 100% of the first line, 50% of the second line and 20% of the third line

   B. 80% of the first line, of 50% of the second line and 20% of the third line

   C. 80% of the first line, 50% of the second line and 10% of the third line

   D. 50% of the first line, 50% of the second line and 20% of the third line

15.  Which of the following relay is/are overload relays?

   A. Thermal

   B. Electromagnetic

   C. Induction

   D. All of the above

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