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Light load adjustment involves _________

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in Electrical Measurements by (148k points)
Light load adjustment involves _________

(a) applying rated voltage across the pressure coil

(b) adjusting a light load

(c) applying rated current across the transformer

(d) applying rated voltage across the current coil

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This is a very interesting question from Electronic Energy Meter, Adjustments in Single Phase Energy meters in chapter Measurement of Power and Related Parameters of Electrical Measurements

1 Answer

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by (541k points)
Right option is (a) applying rated voltage across the pressure coil

Explanation: Disc rotation is adjusted in such a way that correct speed is maintained. The pressure coil is supplied with the rated voltage and the current coil is provided with only about 5 % of the full load at u.p.f.

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