Question

The secondary winding of a P.T. is designed for _________

(a) 220 V

(b) 2.2 kV

(c) 1.1 kV

(d) 110 V

This question was addressed to me at a job interview.

The question is from Differences between C.T. and P.T. topic in section Extension of Instrument Ranges of Electrical Measurements

Answer 1

Right choice is (d) 110 V

To elaborate: A potential transformer is generally used for the measurement of the very high magnitude of voltages in a circuit. But the secondary winding of a P.T. is designed for a capacity of 110 V.