Star 220 v and delta 400 i star 58 percent only voltage applied delta 400v appliedAnswerThese figures do not represent three-phase, four-wire, system voltages, because if the line voltage were to be 440 V, then the phase voltage would be 254 V; or, if the phase voltage were to be 220 V, then the line voltage would be 381 V.
The Line normally refers to the live wire in a single-phase system and the three live wire of a 3-phase system. In a 3-phase system the line voltage is usually quoted as the nominal voltage, and that is the voltage between any two of the live wires. The voltage between one of the lines and neutral is 1/sqrt(3) times less.
Line to line voltage is not the same as line to neutral voltage because line voltages are 120 degrees apart. They are related by: Line to neutral voltage * tan (120 degrees) = Line to neutral voltage * 1.73.Additional CommentFor delta-connected systems, the line voltage is the same as the phase voltage.For wye-connected systems, the line voltage is larger than the phase voltage by a factor of 1.732. The reason for this is as follows:Because any two phase voltages are displaced from each other by 120o, they must be added vectorially, not algebraically, to find the line voltage. As the above answer points out, this means that the relationship between the two is the square-root of 3, or 1.732.
The Voltage produced by the generator will be like 3 sets of your home's voltage (assuming we're looking at an outlet and not the 220V at the brkr box).Each phase (sinusoidal wave) will be separated by 120 degrees, so when the 1st phase starts the 2nd phase will start 1/20th of a second later. The 3rd phase then starts 1/40th of a second later, and the 1st phase starts again 1/60th of a second later which is the beginning of the second set of sin waves. This of course is based on the N. American Frequency of 60 hertz which is 60 cycles (waves) per second.AnswerFor a three-phase, three-wire, system the line voltages will be identical to the phase voltages.For a three-phase, four-wire, system the line voltages will be 1.732 times the value of the phase voltages.
Assuming it is a 208-volt line voltage (as normal in 3-phase) the phase voltage is that divided by sqrt(3), or 120 volts. Each phase has to supply 10 kW so the current on each phase is 83.3 amps.
The line-to-neutral (not 'phase-to-neutral'!) voltage on a 400V 3-Phase wye-connected system is 230V.Line voltage is the voltage as measured between any two (2) line conductors (hence its name!). Line voltage is often referred to as the 'line-to-line voltage'.Phase voltage is the voltage as measured between any single line and neutral. Phase voltage is often referred to as a 'line-to-neutral' voltage."400V" on a 400V 3-Phase wye-connected power supply indicates its line voltage. Line voltage in a wye system is always the phase voltage multiplied by the square-root of "3" (1.732) and reflects the vector sum of two individual phase voltages present in a three phase system.Thusly, if the line voltage is "400V", then the phase voltage is 400V divided by the square-root of "3" (1.732), which is 230V.Examples of this for North American power systems are 120/208V, 277/480V and 347/600V. Examples for other areas of the world are 220/380V, 230/400V and 240/415V.
Three-phase voltage in Germany is 400V, single-phase voltage is 230V.
400V
The formula to use is, phase voltage /1.73 = phase to neutral (ground) voltage.CommentThere is no such thing as a 'phase to phase', or 'phase to neutral' voltage. The correct terms are 'line to line' and 'line to neutral'. So the above answer should read: line voltage/1.73= line to neutral voltage = phase voltage.
There is phase to phase voltage in 3 phase system.AnswerYou don't get voltage 'phase-to-phase'; it's 'line-to-line'!
KVA means product of voltage and current. For 3 phase generator, its KVA = (1.732 X (Line Voltage) X Current)/1000.Put line voltage in this equation and get current.
Star 220 v and delta 400 i star 58 percent only voltage applied delta 400v appliedAnswerThese figures do not represent three-phase, four-wire, system voltages, because if the line voltage were to be 440 V, then the phase voltage would be 254 V; or, if the phase voltage were to be 220 V, then the line voltage would be 381 V.
I will try and make this as simplified as possible. The secondary side of transfomers are connected in star - which means there is a neutral / earth connection. If you measure between a LINE to LINE ('line voltage') voltage you will measure 400V, but now we have introduced the neutral / earth and we measure between LINE to NEUTRAL ('phase voltage) 's LINE to EARTH we will get 230 V. The reason for this is that, because the phase voltages are displaced, in time, by 120 electrical degrees, you must add them vectorially to obtain the line voltage. And the vectorial sum of two 230-V phase voltages, displaced by 120 degrees, is 400 V -or 1.732 times either of the phase voltages.
yes it can
The voltage you are referring to is a 'line-to-line' voltage ('line voltage'), as there is no such thing as a 'phase-to-phase' voltage.480 volts. In real life, the voltage will vary slightly by up to 3% (14 V) on a properly sized circuit. Line to neutral will measure 277 volts, plus or minus 3%.
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.
The nominal voltage in the UK is 400/230 V. That is 400 V line-to-line (i.e. line voltage), and 230-V line-to-neutral (i.e. phase voltage). Allowable variation is +10% and -6%.