Single Phase Voltage in Domestic AC

http://en.wikipedia.org/wiki/Domestic_power

Low voltage indicates both the upstream distribution system and the power generation equipment are undersized for the demand/the demand is too high for the available supply.

Low frequency indicates the generation equipment is undersized for the demand/the demand is too high for the available supply.

Please tell me the Volts in INDIA in Single Phase in Domestic Supply.

Get a VOM!

The original poster may only have an AVO, though.

I believe he wants to know what the voltage should be, not what it is, which is what the VOM will read. In many places should be and is just aren't the same.

PW I believe you took that meter from Noah's arc. It worked then and it will work now. Perfect for this job.

How and why?

Long before this 1951 meter left the Ark, generation and distribution equipment was brought in from Britain. It was 50 Hz and 230V single phase (later 240V) because that was the British standard.

Wikipedia http://en.wikipedia.org/wiki/Mains_electricity_by_country#Voltage_ranges

gives 220V for India, I guess a lower voltage was standardised after independence.

The speed of most motors is directly related to the Grid frequency, so the effect on the flow of fans and pumps can be noticeable. More speed means more power required and possible motor overload.

Excursions much above normal frequency are rare, because it means more generators are on-line than needed. You would only see 52 Hz briefly if the Grid suddenly became split and one of the parts had too little load.

Low voltage will cause more motor overheating than high voltage.

High voltage 10% will shorten life of incandescent lamps enormously and electronic equipment will be more stressed.

180 volts on 220 volt rated is seriously low and many motors could have starting problems or even stall, as well as overheating.

Reducing frequency and voltage is a way of managing overloads on a Grid. If load did not fall with frequency and voltage, it would be much more difficult to cope with failure of a large generator without cutting off consumers to save the Grid

Most equipment failures occur due to overheating, so a few seconds of overload is tolerable, but sustained extremes are damaging.