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Wiki User
∙ 13y agoThe line-to-line voltage (line voltage) is the square-root of 3 higher than the line-to-neutral (phase voltage) voltage. So, if the phase voltage is 220 V, then the line voltage must be 381 V.
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Common North American three phase voltages are 120/208, 277/480 and 347/600. The sq. root of three is 1.73. By applying the method in the first answer's formula - 120 (phase to neutral or ground) volts x 1.73 = 208 (phase to phase) volts. Or going the other way 208 (phase to phase voltage)/1.73 = 120 (phase to neutral or ground) volts.
Wiki User
∙ 12y agoSome valid values are 220-440-880, depending upon the service.
AnswerThree-phase system voltages are normally expressed in terms of their line voltages -i.e. the voltage between any pair of the three line (not 'phase') conductors. These values depend on (a) the voltage standards used by the country in which you live, and (b) where in the system you measure those voltages.
So, in the UK, for example, a line voltage can be as high as 400 kV (in the HV transmission system) or as low as 400 V (in the LV distribution system).
Wiki User
∙ 12y agoDear,
the questin is not very clear..
as my understanding there are approx equal volt on each phase in three phase.
AnswerThe voltage of a three-phase supply depends on (1) the national electrical standards of the country in which you live, and (2) where the three-phase system is within the overall transmission/distribution system.
Three-phase systems may be three-wire systems or four-wire systems. High-voltage transmission and distribution systems are practically always three-wire systems, whereas low-voltage distribution sytems are often (but not always) four-wire systems.
The conductors used in three-wire systems are termed line conductors (sometimes, incorrectly, called 'phase conductors'), and the voltage between any pair of line conductors is called a line voltage. For four-wire systems, three conductors are line conductors, and the fourth is called a neutral conductor -once again, the voltage between any pair of line conductors is called a line voltage, while the voltage between any line conductor and the neutral conductor is called a phase voltage.
In the UK, high-voltage transmission/distribution line voltages are 400 kV, 275 kV, 132 kV, 66 kV, and 11 kV. Low-voltage distribution line voltages are 400 V while the corresponding phase voltage is 230 V -written: 400/230 V.
Wiki User
∙ 11y agoMost buildings with a 3 phase service feed are 277/480v. That's 277 phase to ground and 480 phase to phase. This is then transformed to 120/208v.
Answer for European SystemsIn Europe, the nominal low-voltage three-phase distribution systems are 400 V line-to-line (i.e. line voltages) and 230 V line-to-neutral (i.e. phase voltages).
Wiki User
∙ 9y agoUS: 208 v, 480 v; UK: 415 v. The voltage quoted is between any two live wires. HIgher voltages are used for power transmission.
Another Answer
In the UK (and in Europe), the nominal three-phase line voltage is 400 V and the phase voltage is 230 V.
Wiki User
∙ 12y agoconsider 380-440V for three phase power supply
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Can you run a three phase appliance on 240 volt power supply?
No. You need a 3-phase supply that matches the voltage and current rating of your appliance.
What is the voltage for a single phase from a 415 volt 3 phase and neutral supply?
240V. 415 / 1.73 = 240
On a vessal On a three phase 440v supply what is the voltage on the individulal phases?
Phase voltage is equal to the line to line voltage divided by root 3 or 1.732. So 440 L-L/1.732 = 254V. Your phase voltage is 254V.
What is the formula for calculating DC votage from a 3 phase rectifier bridge using AC voltage across one phase?
A 3-phase rectifier bridge can be used with a single phase supply, it just means that four of the diodes are not connected. The peak voltage (if a reservoir capacitor is used) is sqrt(2) times the rms supply voltage and the average voltage using inductor smoothing is 0.9 times the rms voltage.
Why do you have voltage to ground but not voltage phase to phase?
There is phase to phase voltage in 3 phase system.AnswerYou don't get voltage 'phase-to-phase'; it's 'line-to-line'!
When you have 56KVA available in 3 phase supply how much is your available current in 3 phase and how much in 1 phase?
In three phase: I = (three phase VA) / (sqrt(3) x (phase to phase voltage)) for single phase: I = (single phase VA) / ((phase to neutral voltage)) keep in mine three phase VA = 3 x (single phase VA), and phase to phase voltage = 1.732 x (phase to neutral voltage) Therefore the single phase and three phase currents are the same (ie, the three phase currents are the same in all three phases, or balanced). But don't get available current and available power confused (KVA is not the same as KW).
How can you run a 220v 3-phase 60hz motor on a 380v 3-phase supply?
Not advisable, the voltage differential is too great.
Can you run a three phase appliance on 240 volt power supply?
No. You need a 3-phase supply that matches the voltage and current rating of your appliance.
What is the voltage for a single phase from a 415 volt 3 phase and neutral supply?
240V. 415 / 1.73 = 240
How you can convert 1-phase voltage to 3-phase voltage and vice-vars a?
A single-phase supply is obtained between any two line conductors or between a line and neutral conductor of a three-phase supply. To obtain a three-phase supply from a single-phase source is far more difficult, and requires additional equipment.
On a vessal On a three phase 440v supply what is the voltage on the individulal phases?
Phase voltage is equal to the line to line voltage divided by root 3 or 1.732. So 440 L-L/1.732 = 254V. Your phase voltage is 254V.
What is the formula for calculating DC votage from a 3 phase rectifier bridge using AC voltage across one phase?
A 3-phase rectifier bridge can be used with a single phase supply, it just means that four of the diodes are not connected. The peak voltage (if a reservoir capacitor is used) is sqrt(2) times the rms supply voltage and the average voltage using inductor smoothing is 0.9 times the rms voltage.
Why do you have voltage to ground but not voltage phase to phase?
There is phase to phase voltage in 3 phase system.AnswerYou don't get voltage 'phase-to-phase'; it's 'line-to-line'!
What is the three phase voltage in Pakistan?
Pakistan has a 220 v 50 Hz domestic supply and the three-phase voltage is sqrt(3) times higher, or 381 v. Higher voltage are also used for three-phase power transmission.
What is ac supply in America?
The most common voltage supply to homes is single phase 120V / 240V. In the states for industries, 3 phase 480 Wye 277. In Canadian industries, 3 phase 600 Wye 347 volts.
How can you run a 380VAC 3-phase 50hz motor on a 220VAC 3-phase 60hz supply?
How to convert 100ampere to kva?
Divide by your number of phases 1 or 3 then divide by your Voltage. If its a 3 phase supply Voltage you need to divide by your 3 phase voltage for balanced loads and by your single phase voltage for unbalanced loads requiring a neutral.
