Power Systems
Which of the following is/are the desirable properties of a insulator material?

 Both 1 and 2
 High relative permittivity
 High ratio of puncture strength to flash over.
 Low ratio of puncture strength to flash over.

ANSWER DOWNLOAD EXAMIANS APP

Power Systems
In a biased differential relay the bias is defined as the ratio of

  fault current and restraining coil current.
  fault current and operating coil current.
  number of turns of restraining and operating coil.
  operating coil current and restraining coil current.

ANSWER DOWNLOAD EXAMIANS APP