Question

How are instrument transformers different from shunts and multipliers?

(a) they are all the same

(b) they have transformers

(c) readings are independent of component values

(d) they can be used for high voltages and currents

I had been asked this question during a job interview.

My query is from Advantages of Instrument Transformers topic in portion Extension of Instrument Ranges of Electrical Measurements

Answer 1

The correct answer is (c) readings are independent of component values

The explanation is: Instrument transformers can be used for extending the range of the A.C. instruments. In instrument transformers, readings are independent of the values of R, L, and C. But in the case of shunts and multipliers, the readings depend on the values of circuit constants.