Please excuse the elementary question, but with a 5 foot fluorescent light the LPF and HPF types, (with and without a fitted power correction capacitor).
On a conventional domestic supply meter, which would register the higher power consumption or would they be the same.
Martin
Practically, they would both consume about the same power. The LPF (low power factor) will cause some additional power loss to be produced somewhere.
Bill
They would be the same.
LPF would draw approx twice the current though, which you have to bear in mind when working out circuit load and fusing, particularly when using several such fittings.
Depends on what the meter measures. USA residential meters measure true power, in other words, HPF and LPF will cost you the same, although it's always best to strive for as close to unity as possible, as it reduces waste in the resistance of the wire. Someone told me that power meters in some countries measure apparent power, I don't know if this is true or not, but if it is, then HPF will cost approximately half.
UK residential customers have to be metered on true power.
Power companies are allowed to use other schemes for non-residential customers.
On 27 Mar 2008 19:41:31 GMT Andrew Gabriel wrote: | In article , | "James Sweet" writes: |> |> Depends on what the meter measures. USA residential meters measure true |> power, in other words, HPF and LPF will cost you the same, although it's |> always best to strive for as close to unity as possible, as it reduces waste |> in the resistance of the wire. Someone told me that power meters in some |> countries measure apparent power, I don't know if this is true or not, but |> if it is, then HPF will cost approximately half. | | UK residential customers have to be metered on true power.
So you can have a power factor of 0.1 at home and not be dinged for it?
The US is the same. Watt-hour meters measure energy.
Correct.
The EU has/is imposing minimum power factors on various volume electrical goods over certain power ratings.
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