What happen when AC supply is given to DC voltmeter and DC supply given to AC voltmeter?

spg1990

 Profile Answers by spg1990 Questions by spg1990

• Dec 24th, 2009

When an AC supply is given to a DC voltmeter the DC voltmeter cannot respond to the change in magnitude(bcoz the mag. of AC voltage varies). so, it will give a constant value of 0.

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What is use of Grounding the Neutral of the star connecting transformer through resistor (NGR)?

Sandhya.Kishan

 Profile Answers by Sandhya.Kishan Questions by Sandhya.Kishan

• May 17th, 2012

All electrical systems should have a link to ground.otherwise there will be severe ground insulation stress on transients. A neutral grounding transformer links the power system neutral to ground.
A resistors used for earthing the star point of a transomer and protect the transformer.

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