Question

How can temperature effect be compensated in an energy meter?

(a) through heat sinks

(b) by a temperature shunt

(c) by using resistance

(d) by using a coolant

I got this question in examination.

I'd like to ask this question from Errors in Single Phase Energy Meters topic in division Measurement of Power and Related Parameters of Electrical Measurements

Answer 1

Right option is (b) by a temperature shunt

To explain: The resistance of the copper and aluminium parts in an energy meter increase with an increase in the temperature. As a result the disc rotates with a speed that is higher than actual. Temperature effects can be compensated by making use of a temperature shunt on the brake magnet.