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The ratio for a 480 VAC to 120 VAC is 4 to 1.

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Q: What is the ratio of a 480vac single phase and a 120 vac secondary voltage?
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Related questions

Can you connect 480vac 3 phase to 230vac single phase?

To connect 480vac 3 phase to 230vac single phase, you need a step down transformer, 480 to 230, connected to one phase.


How do you calculate three phase transformer turns ratio?

By determining the transformer's primary and secondary phase voltages. The ratio of the primary phase voltage to the secondary phase voltage will be practically the same as its turns ratio.For example, in the case of a delta/star connected transformer, the primary phase voltage will be its primary line-to-line voltage; it's secondary phase voltage will be its secondary line-to-neutral voltage.


What is the Single phase voltage in India?

The single phase voltage in India is 230v when we check with the phase and the nutral single line


How is a single phase voltage generated?

A single phase voltage is normally the voltage between one phase of a 3 phase generator and the neutral wire.


What is the mutual coupling in single phase transformer?

primary winding flux links with secondary winding produses voltage across the secondary winding


What is 3 phase voltage in Germany?

Three-phase voltage in Germany is 400V, single-phase voltage is 230V.


What will happen if you use phase to phase voltage for a single phase device?

Phase to phase, two wire is classed as single phase. If the voltage from the phase to phase match the device's operating voltage, then connecting the device will allow it to operate.


How do you calculate of secondary average voltage of single phase transformer?

It depends on the number of turns on the winding. The voltage on each winding is proportional to the number of turns.


Why single phase voltage is 230volt?

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.


What voltage you get at home in India?

The single phase voltage in India is 230v when we check with the phase and the nutral single line


What voltage is found on a single phase motor?

Ac voltage


The phase relationship between the primary voltage and the secondary voltage of a transformer?

The phase relationship between the primary voltage and the secondary voltage of a transformer is 180 degrees (typically) on single phase transformers. If working with three phase transformers, a zero phase shift is often used in Y/Y grounded transformers. If the transformer is wired Delta / Wye, the phase shift will be 30 degrees. I've seen transformers with a phase shift of 150 as well (quite abnormal, but it exists!) due to the starring and a delta / wye configuration. If you are looking at a transformer phasor diagram, this will show the phase shift between primary or secondary (three phase transformers). For single phase, there should be a drawing showing polarity markings - what goes in the polarity marking on the primary comes out on the secondary polarity marking.


What is kva rating of single phase transformer?

This is the rated output of the transformer, obtained by multiplying the rated secondary voltage by the rated secondary current. And it's 'kV.A', not 'kva'.


What is peak voltage value of 3 phase?

The same as in single phase with the same RMS voltage.


How much voltage use in home in India?

It is 230V single phase and 440V in 3 phase system at 50 Hz.AnswerIf the single-phase voltage is 230 V, then the three-phase voltage must be 400 V, not 440 V. The line voltage is 1.732 times the phase voltage.


What is typical single phase voltage in Canada?

The standard nominal voltage in Canada for a single-phase residential supply is 240/120-V split-phase supply.


How do you find out capacity of single phase transformer?

A transformer is going to have a kva rating on the nameplate. Divide this number by the voltage of the primary or secondary and you get the amp capacity of the primary or secondary respectively. Do not use the voltage of the primary to determine the amp capacity of the secondary, or vice versa.


What are possible uses of a single phase 30VA transformer?

To continuously supply a load of up to 30-V.A at the rated secondary voltage of the transformer.


What is the voltage between each lead of a 480 volt three phase delta secondary?

The voltage between each lead of a 480 volt three phase delta secondary is 480 volts.


What is the voltage value phase to phase at 180 degrees apart?

Single phase voltages vary throughout the world. To answer this question a basic voltage or country voltage has to be stated.


What is the difference between single phase and three phase transformer?

A single phase transformer uses one primary to secondary coil. A three phase transformer uses three, one for each phase, primary to secondary coils.


What is the voltage and current for a single phase supply?

240v


Can you use line voltage as a single phase?

yes you can


Difference 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 turn ratio is done on a three phase transformer?

The same as for single phase transformers - there is a 3-phase primary winding, and a 3-phase secondary winding; these have different number of turns, resulting in stepping up / down voltage and current.