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How you can produce 240 volts from a single phase 3 wire system with a nominal voltage of 120 volts?
Wiki User
∙ 11y ago
you can use two hot wire different phases with a double pole braker .
Wiki User
∙ 11y ago
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Is a Line voltage understood to be any voltage?
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.
Can voltage increase or decrease in a system during a day?
Power supply voltages vary with the amount of load placed on them. In many countries the supply voltage has a nominal voltage and a plus or minus tolerance. In the UK the nominal voltage is 230 v but the allowable variation is -6% +10%, in other words 216-253. At my house the voltage is usually between about 236 and 253 volts.
Why is mains voltage 230V?
Yes 230 volts is classed as single phase but it is not the only single phase voltage. If you take any two legs from a three phase system, the voltage from these legs is also classed as single phase. The 230 volt single phase is the output of a transformer whose primary is one leg of a three phase primary high voltage system. The 230 volt secondary is center tapped to give 115 volts before the tap and 115 volts after the tap, hence the common voltage of 115/230 that is used in North America.
Why is it stated - 3 phase 440 VAC when one phase voltage is 220 VAC?
In three-phase there are three live wires and a neutral. The voltage of a three-phase system is always quoted as the live-to-live voltage, and the voltage from one live wire to neutral is 57.7% of that. A 440 v 3-ph system has 254 volts between live and neutral. <<>> The question statement is not correct. Two legs from a three phase three wire 440 volt system will still be 440 but classed a single phase. On a three phase four wire system supply, the voltages will be determined by the following equation. 440/(square root of 3) 1.73 = 254 volts. The second single phase voltage attainable from this source connection is any one of the three phase legs to grounded neutral center point. This is known as a wye or star point connected voltage supply. To obtain a 220 volt single phase voltage, the three phase system would have to have a voltage of 220 x 1.73 = 380 volts.
Why there is different types of voltage range 210 Volt 220 Volt 230 Volt 240 Volt 250 Volt in single phase AC system and what it based?
In the US the voltage is about 220 volts. This voltage is based upon the average voltage of the AC sine wave. It can peak as high as 240 volts or as low as 210 volts. So these different voltages are actually referring to an average 220 volt system.
What is nominal line voltage?
'Nominal' means 'named'. So a 'nominal' voltage is the named voltage of a system. For example, when we talk about a 120-V or 240-V system, we are describing their nominal values, not their actual values which can change from moment to moment.
230V line to line a single phase?
Yes. 230V line to line is considered single phase power. The 115v half part of that is called split phase. It should not be called two phase, as it is one phase that has been center tapped and grounded at the neutral point - it is still one phase power.Answer230 V is the standard nominal voltage for residences in Europe. 230 V is the line-to-neutral voltage (phase voltage). Low-voltage distribution is by three-phase, four-wire, system with a nominal line voltage of 400 V and a nominal phase voltage of 230 V.
What is difference between nominal and terminal voltage?
The rated voltage of a motor listed on the nameplate is called the terminal voltage. This indicates the actual voltage on the motors terminals at which at which the manufacturer designed to operate. Whereas, Nominal voltage is the design or configuration voltage of the electricity distribution system.
Line voltage is understood to be any voltage?
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.
Is a Line voltage understood to be any voltage?
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.
What is the Difference between nominal voltage and operating voltage?
Nominal voltage is the 'named' voltage -for example, the nominal supply voltage in the UK is 230 V. But this is not necessarily the actual voltage at a particular time. A nominal voltage is normally expressed together with the percentage by which it is permitted to vary from that stated value. For example, in the UK, the nominal voltage is expressed as: 230 V +10% / -6% --in other words it is allowed to vary between 216.2 and 253 V.The term, operating voltage, isn't actually defined anywhere, but is usually taken to mean the actual voltage supplied to a device at any particular instant, and this should always fall within the allowable range of the supply system's specified nominal voltage. The operating voltage can be found simply by measuring it with a voltmeter.
What is meant by a nominal current?
The word nominal means the lowest possible safe amount. So, nominal current or nominal voltage is the lowest amount necessary to perform an electrical function like keeping a light turned on.AnswerThe original answer is incorrect. 'Nominal' simply means 'named'. So a 'nominal voltage' is the 'named voltage', as opposed to an 'actual voltage'. For example, the nominal voltage of residential supplies in the UK is 230 V; however, this value is allowed to vary between +10/-6% of the nominal voltage. In other words, a nominal voltage of 230 V may vary between 216 V and 253 V.
What is the voltage range for an auto with a 12vdc nominal electrical system?
You should be getting 14 volts from the alternator.
Why single phase is 240volt?
If you mean why that particular voltage was chosen, as opposed to, say, 256 V, then perhaps someone else could answer the question? If, however, you mean "How is a single-phase 240 V supply obtained?", then the answer is as follows:A single-phase nominal voltage of 240 V is obtained by connecting a load between a line conductor and the neutral conductor of a three-phase system having nominal 415 V line-to-line voltage.This is the standard low-voltage supply used in the UK although, these days, we pretend that it is 230/400 V in order to meet the EU's harmonisation requirements.
Can voltage increase or decrease in a system during a day?
Power supply voltages vary with the amount of load placed on them. In many countries the supply voltage has a nominal voltage and a plus or minus tolerance. In the UK the nominal voltage is 230 v but the allowable variation is -6% +10%, in other words 216-253. At my house the voltage is usually between about 236 and 253 volts.
Why voltage is coming 230v if you measure in between phase and neutralin 415 v 3ph 4wire system?
240V is, of course, the phase voltage for three-phase, four-wire, system having a line voltage of 415 V. But these values are 'nominal' voltages, not actual voltages. Actual voltages are allowed to vary above and below the nominal voltage, as specified in the relevant government legislation. Assuming an allowed variation of plus or minus 6%, that means the line-to-neutral voltage could be as low as 225.6 V. So, it would be perfectly normal for you to measure an actual voltage of 230 V, line to neutral, for a system rated at 415/240 V. For many years, the nominal voltage, and allowable variation in the UK was 415/240 V (plus or minus 6%). However, in order to comply with EU 'harmonisation' rules, the nominal voltage is now 400/230 V (plus 10%/minus 6%) -the change in permitted variation allowed the UK to use a new nominal voltage without going to the trouble of actually changing anything -in other words, the UK system remains unchanged, at 415/240 V, but the 'official nominal' value is now 400/230 V, and the difference is catered for by changing the allowable variation!
How do you calculate the resultant 3-Phase voltage when each has a different reading close to 230?
There is no single 3-phase voltage that answers this question. Just as you have three different phase to neutral readings, you will have three different phase to phase readings.Voltages used to described a power distribution system are 'nominal' values. For instance, the battery in my auto is a '12 volt' battery, yet fully charged it measures more like 13.6 volts, and that number changes with load and state of charge. We still call it a 12V battery. The nominal system voltage in your question would be the 230/400V 50Hz system used in Europe. We would measure about 230V phase to neutral, and about400V phase to phase. The individual phases could vary according to load conditions and transformer taps, but we would still use the nominal numbers when describing this system.Since your question is in the singular, the answer would have to be the nominal system voltage of 400. The formula is:single phase voltage * 1.73 = phase to phase voltage (nominal)If you really meant the exact voltage on each possible phase pair, then easiest will be to measure it. If you really want to mathematically calculate the phase to phase voltages given three unbalanced phase to neutral values, that is a pretty advanced subject I will leave to the next answerer!
