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Pole Transformer problem

Discussion in 'Off-Topic Forum' started by DavyL200, May 28, 2018.

  1. furriner

    furriner DI Forum Adept

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    Why should the Customer get involved in micromanaging these issues? None of this is rocket science though rewinding transformers is very complicated if construction is concentric windings.


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  2. Show Pony

    Show Pony DI Senior Member Highly Rated Poster Showcase Reviewer

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    I can see how my statement may have confused you. If you go back to the OP you will find;
    The home owner has his own transformer (10 KVA) which is presently out of service. That is the transformer that I think he should replace. At the moment the home owner is getting his electricity from a common transformer shared by several house holds.
    You are probably right the transformer feeding his house is overloaded. If they continue to run their fridge at 167 V then pretty soon the will be buying a fridge and a transformer.

    On a side note. Does anyone know how inverter air conditioners and inverter fridges operate on low voltage. The specs for my AC spell out 220 supply with no +/- value. I'm guessing they should start okay with low voltage but maybe can not achieve full speed.
     
  3. Show Pony

    Show Pony DI Senior Member Highly Rated Poster Showcase Reviewer

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    Well the customer does own the transformer. That would be the main reason. It's not going to fix itself.
     
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  4. furriner

    furriner DI Forum Adept

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    An inverter should try to increase the current when the voltage drops, to operate at a constant power during, say, a compression cycle. It compensates like this to a point. Actually, in my experience have a pretty wide range but not too sure they will operate at 167v. Maybe 180v. Good news is that if voltage is too low, they will just shut down and not likely burn out the motor as with traditional types.

    Regarding the transformer, I understood the situation but not sure about why previous owner had his own xfmr. New owner is entitled to community hookup with reasonable load and v >> 167v and should not have to pay for separate xfmr unless he had a larger than normal load, for ex 3 AIRCON units. If he did, he should first try to lease the xfmr from NORECO rather than buy or repair his own.


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  5. PatO

    PatO DI Forum Luminary Highly Rated Poster Showcase Reviewer Veteran Marines

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    I purchased a surplus 25 kv G.E. Transformer from Polaris. Noreco installed it 8 years ago and just had the one problem when a storm and tree branch knocked it out and Noreco reset it.
     
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  6. Plainspoken

    Plainspoken DI Forum Adept

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    I agree
     
    Last edited: May 30, 2018
  7. furriner

    furriner DI Forum Adept

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    25kva. Perfect!


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  8. Dave_Hounddriver

    Dave_Hounddriver DI Forum Patron Highly Rated Poster

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    What do you consider a reasonable load? I guarantee Noreco will see it as less than you do AND less than the average middle class filipino sees it. That is why foreigners with a "reasonable load" get their own transformer.

    In my opinion the electrical grid has become like the road grid. Infrastructure was planned back when filipinos were not expected to have more than a motorcycle and a small a/c.

    Now I look around my subdivision and see many, many homes with 3 air cons and 2 cars. All this with limited power supply, roads and parking. It will get worse before it gets better. Remember I said "in my opinion" That is code for I don't wan to argue with you about it, just sayin'.
     
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  9. OP
    OP
    DavyL200

    DavyL200 DI Forum Luminary ★ Global Mod ★ Highly Rated Poster Showcase Reviewer

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    Noreco were supposed to be getting big 30mva transformer for this area as the one we are hooked up to now is only 4mva i think! One was delivered and installed a couple of years ago bit as usual nothing over this part of town ever gets done.
    There has been power issues here for years now and nothing is ever done to improve it.
    As goes for polaris and noreco not doing repairs to pole transformers,something seems a bit odd there if you know what i mean lol.
     
  10. furriner

    furriner DI Forum Adept

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    A reasonable load would be one 1hp window AIRCON, 1 refig, 1 TV, 1 stereo, lights, PC, laptop, 2 floor stand fans. That’s about 3 kva max, everything running at once. Power Co may disagree and consider 2Kva normal.


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