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Electrical
Advice From an Experienced
Professional |
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| I
= current in Amperes |
E
= Volts |
R
= resistance in Ohms |
P
or
W
= power in Watts |
| KW
= power in Kilowatts |
1KW
= 1,000 watts |
VA
= apparent power in
Volt-Amperes |
KVA
= apparent power in
Kilovolt-Amperes |
| HP
= output power in number of
Horsepower. One
horsepower equals 746 watts |
EFF
= efficiency, expressed in a
decimal fraction (output
divided by input) |
PF
= Power Factor expressed in
a decimal fraction, the
ratio of true power (P, W,
or KW) divided by apparent
power (VA or KVA) |
Top
of Page |
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Formulae
for Single-Phase AC circuits |
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| I
= VA ÷ E |
I
= 1,000 x KVA ÷ E |
I
= W ÷ E x PF |
I
= 1,000 x KW ÷ E x PF |
| I
= 746 x HP ÷ E x PF x
EFF |
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P
= E x I x PF |
VA
= I x E |
| KW
= E x I x PF ÷ 1,000 |
KVA
= I x E ÷ 1,000 |
HP
= I x E x PF x EFF ÷
746 |
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P
= Watts
E
= Volts
I
= Amps
R
= Ohms
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Determine how efficient your light
bulbs (Incandescent, Fluorescent,
Compact Fluorescent, Halogen, Metal
Halide, High pressure Sodium,
Mercury Vapor, Low pressure Sodium
and LED) are by using the following
formula: Lumens ÷ Watts = Lumens
per Watt, where lumens is the
quantity of light and watts is the
power consumed to provide that
quantity of light.
Lumens
= Lumens per Watt
Watts
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| Other
Conversion Charts Below |
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You are on http://www.MrElectrician.tv/conversioncharts/electrical.html
Updated January 28, 2012
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| Copyright
2012 John Grabowski - All Rights
Reserved |
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