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Electricity Supply in the Philippines

AdrianWint

Does any member of this learned forum have first hand knowledge of the public electricity supply in the Philippines?

I'm thinking more about the technical characteristics of the supply here not the availability or reliability.

I know that the supply is 60Hz out but what about the arrangements for single & three phase supplies?

We have any inquiry about the possible sale of equipment but the Agent out there isn't very technical.

From what I can gather the common three phase supply is 220V phase to phase but the neutral is not distributed, so a single phase supply is also 220V and is provided by talking two lines from the three phase feeder (ie. neither of the 'poles' of a single phase supply is a 'neutral').

Also, what about the earthing arrangements? Is the star point of the distribution transformer earthed? Obviously if the neutral is not distributed then TNCS etc are out, but is a 'ground' distributed or is TT the only offering?

Obviously this has possible ramifications for any equipment sold to the country: single pole switching is a no-no as is single pole fusing.

Is anyone able to confirm this from first hand knowledge? I know there are several WIKI sites & such like that offer information about the electrical services around the world but they don't seem to give a consistent answer!

  • 0

    https://www.iec.ch/world-plugs suggests they use both A & B (American 115V, polarised) and C (Euro 2-pin reversible 220V) sockets, which feels a bit odd, given the apparent 220V 60Hz supply.

    From https://myphilippinelife.com/philippine-electrical-wiring/ it sounds like the country has a bit of a mish-mash of supply systems - US style 110/220V split phase in some areas and European style 220/380V 3-phase in others. It sounds like N is distributed, multiply earthed (Australian/US style) - but 220V might be delivered L-L or L-N depending on which area you're in.

       - Andy.

  • 0

    My understanding is that both the following are widely used.

    3 phase, 4 wire, at 220/380 volts.

    3 phase, 3 wire at 220 volts.

    Less common possibilities include 3 phase, 4 wire at 127/220 volts.

    Single phase 3 wire at 110/220 volt.

    Single phase 3 wire at 220/440 volt.

    There is therefore a significant chance that 220 volt circuits will have both poles live. Fixed equipment intended for permanent connection  should therefore have switches and/or MCBs that operate on all current carrying conductors.

    This may reasonably be relaxed for portable appliances intended to be connected via flexible cord and a plug, since complete isolation may then be achieved by removing the plug from the socket outlet.

  • 0

    That's what they're for: www.gov.uk/.../department-for-international-trade-philippines

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