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Three phase refers to have the power over three lines one delayed by one third of the electrical cycle and the other by two thirds. (The first line is not delayed) Three number of phases has no relationship to the voltage (or frequency for that matter). Power can be delivered by three phase in any voltage whatsoever and there is no reason why the power could not be 1 volt (OK, not really practical) or could be over 660,000 volts and this is very common. Often voltages are 415, 3,300 (3.3kv), 6,600(6.6kv), 66kv and 132kv but these are just examples from my experience. Power voltage throughout the world varies enormously and so it is impossible to stipulate a voltage.
maximum generated voltage is 21KV
It depends on what part of the world it is in and what the usual control voltage is in that part of the world.
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.
Single phase voltages vary throughout the world. To answer this question a basic voltage or country voltage has to be stated.
Three phase refers to have the power over three lines one delayed by one third of the electrical cycle and the other by two thirds. (The first line is not delayed) Three number of phases has no relationship to the voltage (or frequency for that matter). Power can be delivered by three phase in any voltage whatsoever and there is no reason why the power could not be 1 volt (OK, not really practical) or could be over 660,000 volts and this is very common. Often voltages are 415, 3,300 (3.3kv), 6,600(6.6kv), 66kv and 132kv but these are just examples from my experience. Power voltage throughout the world varies enormously and so it is impossible to stipulate a voltage.
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because all over the world there is an standard rate of voltage
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maximum generated voltage is 21KV
An ideal voltage source is a theoretical concept used in electrical engineering and circuit analysis. It is a voltage source that maintains a constant voltage output regardless of the current flowing through it or the load connected to it. In other words, an ideal voltage source has zero internal resistance and can supply infinite current at a constant voltage. In contrast, a practical voltage source is a real-world device that has internal resistance and cannot maintain a constant voltage output when a load is connected to it. The voltage output of a practical voltage source will decrease as the current flowing through it increases, due to the internal resistance of the source. As a result, the voltage across the load will be less than the voltage output of the source, and the difference is known as the voltage drop. In practical applications, it is important to take into account the limitations of practical voltage sources and design circuits that can operate within these limitations. An understanding of the behavior of both ideal and practical voltage sources is essential for designing efficient and effective electrical circuits. You also read more at electronicsinfos. com