What is a single phase supply?

Answer 1

is the measured voltage,generated between a line voltage and the starting point of a three phase transformer, which is the neutral point.

Answer: it is an ac circuit in which the supply has a live and neutral wire, usually at one of the standard voltages 110/120v or 220/240 v. A three-phase circuit is a combination of three single-phase circuits with the phases of the voltages 120 degrees apart so that they peak in a regular sequence.

Answer 2

Single phase refers to the fact that the circuit is powered by a single AC voltage source, as is typical in nearly all residential wiring. An alternative would be 3-phase, as is common in industrial wiring. 3-phase supply consists of 3 separate "phases", or "hot" conductors. The sinewave on each one is (360/3)=120 degrees out of phase with each other. This allows for motors and Transformers to be run much more efficiently as full power is being supplied nearly 100% of the time. See link.

Answer 3

A single phase appliance is one that uses single phase power such as found in the ordinary home power setup. Two phase power and three phase power are used for heavy duty power tools, usually over 5 horse power, and high horsepower motors in factories and industrial applications.

Answer 4

giving the 230 volt in domestic uses & depend upon the load

Answer

All electricity generation/transmission/distribution is by three-phase, three-wire, systems. To obtain a single-phase supply, it is only necessary to connect a load between any pair of the three line conductors. For a four-wire system, a single-phase supply is obtained between a line conductor and the neutral conductor.

Answer 5

Single-phase is used to describe a simple AC power supply on two wires called a line and a neutral. It distinguishes the supply from a three-phase supply using three or four wires, which is common in electric power distribution.

Answer 6

A switch that switches just one phase, i.e. like all the switches in your home. In a factory there may well be a three-phase supply and you would then need a three-phase switch to switch off all phases at once.

Answer 7

Power stations generators are three-phase machines as, for any given load, three-phase transmission/distribution systems are less expensive in terms of the amount of copper (i.e. size and number of conductors) than a corresponding single-phase system.

Three-phase systems are either three-wire systems or four-wire systems. Three-wire systems utilise three line-conductors, whereas four-wire systems utilise three line conductors and a neutral conductor.

To obtain a single-phase supply (and, therefore, what you refer to as a 'single-phase current'), your residence is connected either across either two line conductors or between a line conductor and a neutral conductor -depending on the electricity standards used in your country.

Answer 8

Electricity supply systems are three-phase systems as, for any given load, they are more economical in terms of volume of copper, than a corresponding single-phase system. A three-phase system has three line conductors, whose potentials are displaced by 120 electrical degrees, so there is always a potential difference (termed a 'line voltage') between any pair of lines. Some three-phase sytems have four conductors -three line conductors and a neutral conductor, so, in additional to line voltages, there are three 'phase voltages' (i.e. voltages between any line and neutral conductors). With a three-phase, four-wire, system the line voltage is 1.732 times greater than the phase voltage. To obtain a single-phase supply, the load is connected either between any pair of line conductors, or between a line conductor and the neutral conductor -depending on the level of single-phase voltage required.

Answer 9

Three-phase generators, or alternators, have three windings, physically displaced from each other by 120 degrees, producing three voltages that are displaced from each other by 120 electrical degrees. For a given load, three-phase systems require around 75% of the volume of copper required by a single-phase system and, so, is more economical. Furthermore, three-phase systems deliver a continuous flow of energy, enable self-starting motors, and more compact machines.

Three-phase electricity is transmitted and distributed using three conductors, called 'line conductors'. To obtain a single-phase supply, it is only necessary to connect a load between any pair of line conductors.