HELP-3 phase 440 volts to single phase 230 volts conversion options

Discussion in 'General Electronics Chat' started by khannae, Jan 27, 2014.

1. khannae Thread Starter New Member

Jan 27, 2014
2
0
sir
i have an agricultural land and power supply is 440 volts for few hours(3-4 hrs) and 230 volts for few hours
can i use that power for domestic use?
are there any low cost voltage stabilizers/converters so that we need not keep changing switches?
plss explain in detail as am a noob

Jul 18, 2013
10,271
2,269
What is the purpose of the switch?
Is this the power companies policy of some kind??
Max.

3. studiot AAC Fanatic!

Nov 9, 2007
5,005
513
Why have you appended a double green grin?

Are you extracting the Michael?

Or do you really have a question that you would like to specify properly?

4. khannae Thread Starter New Member

Jan 27, 2014
2
0
sir
My background:i am an INDIAN, am a medical professional
i have three phase power connection with great voltage fluctuations and even phase fluctuations
we get three phase power for few hours and single phase for few hours with same cables .the voltage fluctuates a lot
can i make that 3 phase power to single phase stable 230 volts?
what are all the things i require? to make it work
green grin is for my lack of knowledge about electricity and phases

khannae

Last edited: Jan 27, 2014

Jul 18, 2013
10,271
2,269
Somehow I suspected what your CofO was.

What is the present cause of the fluctuation?
And how do you cope with this right now?
It could, and probably does cause havoc with equipment?
Max.

Last edited: Jan 27, 2014
6. inwo Well-Known Member

Nov 7, 2013
2,422
315
What power levels do you require?

The only thing that comes to mind is a group of UPSs.

Operating from 230-480 input. One for each phase pair. Dc outputs paralleled.

Only practical at low levels.

Old school method that may be found surplus, motorized variacs, that could follow a huge voltage swing.

That still doesn't help if random phases get dropped.

Or is it always the same phase? That would simplify.

7. studiot AAC Fanatic!

Nov 9, 2007
5,005
513

I do not believe that you have equipment that is connected to 230 volts for part of the day and 440 volts for another part.

What you have sounds like what we used to call " the White Meter".

This provides a supply at certain times of day at a low £rate. This is because it is at night and other times when no one else wants electricity and the power station still has to run.

As to 3phase, that is not a problem, some heavy demand equipment may be wired for 3phase. In a domestic envioronment this could be fixed water heaters, air conditioners, or space heaters.

But this equipment will only work on 3phase and is not suitable for single phase.

Equally the single phase equipment will not work on 3 phase.

It would be dangerous to cross wire either.

The single phase voltage is the voltage between any phase and neutral.
The voltage between the phases is √3 times the single phase voltage, so your values are adrift somewhere.

In the European system we have 240 volts single phase and 415 volts 3 phase (between any two of the three phases), although each of the three phases is 240 volts.

So go back to your power company and get the correct facts.
These should include their terms of supply.

8. #12 Expert

Nov 30, 2010
16,033
6,545
Nice variation. Only a few people that are not in England could translate that.