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
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    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 :D:D
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    What is the purpose of the switch?
    Is this the power companies policy of some kind??
    Max.
     
  3. studiot

    AAC Fanatic!

    Nov 9, 2007
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    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

    thanks in advance
    khannae
     
    Last edited: Jan 27, 2014
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
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    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
    2,433
    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
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    I think you should talk to your power supply company and ask them to help you understand your supply.

    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.

    Then we can help you
     
  8. #12

    Expert

    Nov 30, 2010
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    Nice variation. Only a few people that are not in England could translate that.
     
  9. MaxHeadRoom

    Expert

    Jul 18, 2013
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    That was the 'polite' version.
    Max.
     
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