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There is no voltage in three phase wire. The ability of wire to carry voltage is dependant upon the insulation that surrounds the wire. The thicker the insulation the higher the voltage potential can become. Three standard insulation voltages are 300, 600 and 1000 volts.
Another Answer
First of all, there is no such thing as a voltage 'on' a wire. 'Voltage' is another word for 'potential difference', so a voltage can only exist between two wires. Voltages in three-phase systems are generally specified in terms of their line voltages-i.e. the voltage between any two line conductors. These depend on the electrical standards used in the country in which you live. In the UK, for example, three-phase transmission lines will have line voltages of 400 kV, 275 kV, or 132 kV, while distribution lines will have line voltages of 33 kV and 11 kV, and low-voltage distribution line voltage is 400 V.
Wiki User
∙ 9y ago
Wiki User
∙ 8y agoUp to 5 wires can be used in a three phase system, with 3 live wires, 1 neutral and 1 ground (earth).
A 4-wire system is common for groups of houses or small businesses. These are three live wires and a neutral. The ground wire is locally connected to ground rod(s) and cold water pipes and gas pipes at each property.
For medium and high voltage power distribution a 3-wire system is commonly used consisting of three live wires. When the system is balanced, with equal currents in all three live wires, no neutral is needed.
Wiki User
∙ 11y ago480 volts
AnswerIt depends on the electrical standards of the country in which you live, and to which part of the transmission and distribution system you are referring. In the UK, for example, it can be as high as 400 kV in the h.v. transmission system, or as low as 400 V in the l.v. distribution system. These voltages are called 'line voltages', and are measured between any pair of the three line conductors.
Wiki User
∙ 11y agoThat depends on what the 3 phase power is used for, but for home uses that need 3 phase it would be between about 200V and about 280V.
In industry 3 phase is much more widely used and ranges from about 200V to about 900V.
Distribution and transmission lines are usually 3 phase. Long distance transmission line 3 phase can be higher than 1,000,000V.
Is the 3 phase you are asking about a Delta or a Y system?
Wiki User
∙ 12y agoIt varies. I have seen three phase systems all the way from 240 volts to 345 kilovolts. Typically, they run 480 volt but, again, it depends on the application and the region of the country.
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Why two phase supply is not used?
It is in some places, but not generally because it requires at least 3 wires, and can only transmit 2/3 of the power of an equivalent 3 wire, 3 phase system.
How many wire or core in three phase electrical connection and single-phase electrical connection?
A single-phase cable will have a line and a neutral conductor and, possibly, but not necessarily, an earth (ground) conductor. A high-voltage three-phase cable will have three line conductors. A low-voltage three-phase cable is likely to have three line conductors and a neutral conductor.
How you differentiate between single phase and three phase transformer?
A single-phase transformer works with a single-phase supply, while a 3-phase transformer is used with a 3-phase supply. A single-phase transformer has 2 wires on the primary and secondary (ignoring taps) while a 3-phase tansformer has 3 or 4 wires on the primary and secondary.
How three phase line current convert in single phase?
The current is the same in the three live wires. The voltage can be described as the line voltage (phase to neutral) or the phase voltage (phase to phase) which is larger by a factor of sqrt(3). So a line voltage of 230 v corresponds to a phase voltage of 400 v.
If a motor has 3 red wires and 3 black wires coming from the windings what phase is it?
It would help to know the voltage of the motor. See related links below for motor connections.
How many wires come in from the weather head?
If single phase - 2 wire service > two wires If single phase - 3 wire service > three wires If three phase - 3 wire service > three wires If three phase - 4 wire service > four wires US residential service is usually single phase 3 wire service: Two hots and neutral.
How many wires in a single phase motor?
There should be 2 or 3 wires. A hot, a neutral and sometimes a ground.
Are red and brown wires both active?
in 3-phase yesin single phase they may be used for things like 3-way switches in place of duplicate black wires and thus would not always be hot
Why two phase supply is not used?
It is in some places, but not generally because it requires at least 3 wires, and can only transmit 2/3 of the power of an equivalent 3 wire, 3 phase system.
How many wire or core in three phase electrical connection and single-phase electrical connection?
A single-phase cable will have a line and a neutral conductor and, possibly, but not necessarily, an earth (ground) conductor. A high-voltage three-phase cable will have three line conductors. A low-voltage three-phase cable is likely to have three line conductors and a neutral conductor.
How you differentiate between single phase and three phase transformer?
A single-phase transformer works with a single-phase supply, while a 3-phase transformer is used with a 3-phase supply. A single-phase transformer has 2 wires on the primary and secondary (ignoring taps) while a 3-phase tansformer has 3 or 4 wires on the primary and secondary.
What is the difference between single phase circuit and tree phase circuit?
single phase have 2 wire treephase have 3, and 4 wires
What happens if you change wires around on 3 phase motor?
It depends on how, and with what you change them.
Why is 3-phase important?
Because 3-phase is the way electric power is generated, transmitted and distributed. The 3-phase format is broken down into single-phase supplies only at the consumer level, so that you might be on red phase while your neighbour on one side is on yellow and the neighbour on the other side is on blue. 3-phase is used all over the world for all significant amounts of electric power because it can be distributed using less cable and therefore less power-loss. Three single-phase supplies need 6 wires, while a 3-phase supply takes advantage of the phasing to use only 3 wires for the same power. Each pair of live wires acts as the return wire for the other wire in a symmetrical and balanced system.
How many wires is used to power conventional dc motor?
3
Is it possible to connect 3 phase 440 V without neutral line to the machine having 3 phase 4 wires with neutral line?
yes
How three phase line current convert in single phase?
The current is the same in the three live wires. The voltage can be described as the line voltage (phase to neutral) or the phase voltage (phase to phase) which is larger by a factor of sqrt(3). So a line voltage of 230 v corresponds to a phase voltage of 400 v.
