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58 watt Fluorescent Lamps Power Requirement

Discussion in 'Electrical Engineering' started by martin, Mar 26, 2008.

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  1. martin

    martin Guest

    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
     
  2. 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.
     
  3. James Sweet

    James Sweet Guest

    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.
     
  4. UK residential customers have to be metered on true power.

    Power companies are allowed to use other schemes for
    non-residential customers.
     
  5. Guest

    | In article <[email protected]>,
    |>
    |> 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?
     
  6. krw

    krw Guest

    The US is the same. Watt-hour meters measure energy.
     
  7. Correct.

    The EU has/is imposing minimum power factors on various volume
    electrical goods over certain power ratings.
     
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