how to measure 150 volt using voltmeter which can read up to 100 volt

Dear all,

You can use voltage divider. If your Voltmeter has impedance 1MΩ, prepare two pieces of 10 kΩ resistance (1 % of 1MΩ), connect the resistance in series. Connect open ends of the series resistance to 150V voltage. Measure the voltage between one of the 150V line and center of series resistance. If you read 75V, the supply is 150V.

Regards

Or, if you determine the internal resistance of your meter to be 1 Meg Ohm, then you can use a 1 Meg Ohm resistor in series with you test point connection and the reading will be half of the actual reading. So you multiply by 2 for the actual voltage.

Fewer components, easier to handle.