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Volt drop at the intake - Just looking to compare with sunny Thailand.

crossy
A nice easy one.


On a "standard" UK domestic supply what sort of volt drop would you expect at the intake for a load of 50A?


In an urban environment and in a rural environment.


We are dropping about 30V (from a nominal 220V) at 50A, of course the other loads in the village may already have pulled things down to 205V!!

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    Standards overseas tend to differ.

    On a nominal 220 volt supply I would in most cases expect no more than 10% voltage drop at the intake, so about 198 volts minimum, plus a few percent within the consumers installation, so perhaps a minimum of about 190 volts at the appliance.


    Voltage regulators are readily available in countries where the voltage varies a lot. Some are automatic, others rely on manual adjustment.

    The better sorts are continually variable, the more basic style use simple step control. Often something like minus 6%, plus 6%, plus 12% and plus 18%.


    If your line voltage is regularly low, then a simple home made voltage booster is a possibility. A simple "plus 10%" transformer will often help a lot.
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  • 0
    Standards overseas tend to differ.

    On a nominal 220 volt supply I would in most cases expect no more than 10% voltage drop at the intake, so about 198 volts minimum, plus a few percent within the consumers installation, so perhaps a minimum of about 190 volts at the appliance.


    Voltage regulators are readily available in countries where the voltage varies a lot. Some are automatic, others rely on manual adjustment.

    The better sorts are continually variable, the more basic style use simple step control. Often something like minus 6%, plus 6%, plus 12% and plus 18%.


    If your line voltage is regularly low, then a simple home made voltage booster is a possibility. A simple "plus 10%" transformer will often help a lot.
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