Can you step up 220 volt AC to 380 volt AC with transformer?

Answer 1

Answer for UK, Europe and countries running a 50 Hz supply service.

A voltage of 380 volts is not a standard North American voltage, it is a European system voltage. The 220 volts is the line to neutral voltage of 380 volts wye connected system. 380/1.73 = 220

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances

always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

Further Answer

As the original answer says, a line voltage of 380 V would result in a phase voltage of 220 V for a delta/wye transformation, but 380 V is not a standard voltage either in North America or in Europe.

The standard nominal line voltage (i.e. line-to-line voltage) used throughout European three-phase low-voltage systems is 400 V. As European three-phase distribution Transformers are always connected delta/wye, A 400-V nominal line voltage results in a 230-V phase voltage (line-to-neutral voltage).

Answer 2

dear frend i want to ask you

my power is 415v /three phase and 240 volts single phase

and i want to go down to 380v/three phase and 220v single phase

if make this change

i wiil pay less electricity

my fuses is 30 amps three phase and the power from the main electrical company is

415v t/p and 240v s/p

and what is the price for this rasformer ingluded and shipping cost to come here in Cyprus

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Cannot help you with costs- you will need to check with an electrical supply company You are correct that you need a stepdown transformer. HOWEVER- your electrical utility charges will not be less. The TRANSFORMER is still using the higher voltage- AND- there are losses in any transformer. You need to talk with a real electrician where you live. You are trying to get something out of nothing, and that does not work.

Answer 3

Yes it is possible to convert any voltage to another provided the losses are not too great. It is just the ratio of primary to secondary windings in a transformer.

Answer 4

You will have to use a step down transformer to do this. Voltage to earth measures 277 vac on a 480 vac wye system.

Answer 5

Yes, this is called a step up transformer and this is the prime purpose of using transformers.