How a three phase supply is given to a house?

Answer 1

I would buy or build a rotary phase converter. You can build your own from a old three phase motor. Plans are available on the internet, I have built several and installed manufactured units. The rotary units seem to provide good stable three phase power and are not any trouble to maintain.

Do you need a lot of three phase power all the time or do you just have one small device to run some of the time? If you need a lot and most of the time then why not contact your local electricity supply company and get the supply changed over? This will mean paying a fee and replacing the 'consumer box' (or whatever it is called where you live) - more expensive initially but using a rotary converter could cost more in the long term as they are not 100% efficient and waste some power, also mechanical devices always fail eventually and the day it dies you have no power until you get a new one built/installed. But your best choice depends on what you are trying to do, and why.

Answer 2

A 3-phase service is usually available from a local substation so, if the question is asking about how to get a 3-phase service put into a home or some other site, such as a garage or a workshop - so that equipment requiring a 3-phase service can be used - the answer is to ask your local electricity service supplier to install a 3-phase panel and outlets for you.

Another answer

The grid that supplies local substations works at a range of higher voltages for power distribution as 3-phase. The generating plants which supply the grid have 3-phase generators installed, usually running from steam turbines.

A typical common use of 3-phase in UK/Europe is to feed a street of houses with a 400 v 3-phase 4-wire supply. Each house is supplied from one live wire and the neutral, which gives a 230 v single-phase supply. 230 = 400 / sqrt(3).

Over a group of houses the currents drawn are expected to average out so that the total on each phase is roughly equal. The group is fed from a transformer of up to 1000 kVA connected to an 11,000 volt 3-phase 3-wire supply, and that supplies 200-300 houses.

Answer 3

Three phase supply is the combination of three individual line wires which are R,Y,B and one neutral wire.voltage between any pair of line wires is 400 volts.And voltage between line and neutral is 230 volts.Our house appliances require only 230 volts so we take two wires one from phase and one from neutral and it is given to our energy meter.

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In North America homes seldom require three phase services. Apartment buildings use a three phase service of 120/208 voltage. It is supplied the same way as single phase services. The only difference is the service Transformers to the home. There will be a bank of three single phase transformers connected in a wye configuration to supply the service. The larger appliances in the apartments will be designed to operate on 208 volts instead of the regular 240 volt supply.

Answer 4

When the home has a three phase load, such as a three phase pool pump, or perhaps some workshop equipment.

Answer 5

I don't.

You may have 3 phase power for various motors - pool pumps is a fairly common example.