Voltmeter

 Single and Three phase voltmeter :

• To measure voltmeter, we have to use MCB.

• C.T is use to measure for amper not for volt.

• Energy meter ; i.e.. Ammeter, Voltmeter (or) KWM . Supply should be must.

• The difference between voltmeter and ammeter are voltmeter has 2 phase= RY-YB-BR.

Where, Ammeter has 1 phase = R-Y-B.

- Single phase voltmeter :

- Three phase voltmeter :