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58 watt Fluorescent Lamps Power Requirement

M

martin

Jan 1, 1970
0
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
 
A

Andrew Gabriel

Jan 1, 1970
0
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.

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.
 
J

James Sweet

Jan 1, 1970
0
martin said:
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

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.
 
A

Andrew Gabriel

Jan 1, 1970
0
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.
 
| In article <mYCGj.4467$Ew5.2750@trnddc04>,
|>
|> 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?
 
K

krw

Jan 1, 1970
0
phil-news- said:
| In article <mYCGj.4467$Ew5.2750@trnddc04>,
|>
|> 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.
 
A

Andrew Gabriel

Jan 1, 1970
0
|
| 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?

Correct.

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