kilowatt per hour

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DE_man

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what is the kilowatt per hour for

480volts, 36amps, .80 power-factor, three phase

I came up with 23.91KWH am I right
 
I agree with the numerical result of 23.91. But the unit of measure should be "kilowatts (KW)," not "KHW." Also, the initials "KHW" stand for "Kilo Watt Hours," not "Kilo Watts per Hour."

If you measured the load on a building for one continuous hour, and it stayed constant at the level you named, then the total energy used during that hour would be 23.91 KWH.

Welcome to the forum.
 
Just to be picky, while we are getting the notations straight (I have to keep reminding myself of these): the associated abbreviations are kWh, kW, kvar, kVA, kA, kV, kJ, hp, Ah, Hz, Btu, ac, dc, rms, h
 
Thanks, Mivey. But I will continue to abbreviate these terms as I wish, and I don't promise to do it the same way every time. ;) :smile:
 
weressl said:
but MWh

why kvar and not kVAr or kVAR

and I think AC and DC
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Basically because IEEE publication guide says so. For most units there is a logic. The names of units and prefixes always begin with lower-case letters except at the beginning of a sentence (except for the degree Celcius for some reason unknown to me). The symbols of units begin with a small letter, except where the symbol is derived from the name of a person (N for newton, g for gram). The symbols of all prefixes are small letters, except for prefixes dealing with multiplication factors of 1,000,000 or more. I guess the logic is that var is a name of a unit, not a symbol, whereas VA is a symbol for the unit voltampere.
 
jghrist said:
Basically because IEEE publication guide says so. For most units there is a logic. The names of units and prefixes always begin with lower-case letters except at the beginning of a sentence (except for the degree Celcius for some reason unknown to me). The symbols of units begin with a small letter, except where the symbol is derived from the name of a person (N for newton, g for gram). The symbols of all prefixes are small letters, except for prefixes dealing with multiplication factors of 1,000,000 or more. I guess the logic is that var is a name of a unit, not a symbol, whereas VA is a symbol for the unit voltampere.
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var is derivative of VA and stands for VaoltAmperes reactive.

I don't think your lower case The k is lover case in the kilo because K is another unit definition. M for Mega and m for mili for example.

Please refer to a complete set of symbols here:

http://standards.sedris.org/18025/text/units_A.html
http://standards.sedris.org/18025/text/units_M.html

 
charlie b said:
Thanks, Mivey. But I will continue to abbreviate these terms as I wish, and I don't promise to do it the same way every time. ;) :smile:
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But look at your first response carefully. You put "KHW", not KWH and you did it twice! Surely you don't espouse changing the order of the words as well!

(and I'll call you Shirley if I want to!) :wink: :grin:
 
FWIW, This book is not meant to be a standard but more of a conversion reference and is one of the most extensive compilations of units and conversions I have seen (ancient and modern):
"Encyclopaedia of Scientific Units, Weights and Measures" by Cardarelli

I have the 2003 version and it has over 20,000 unit conversions and 5,000 unit definitions and is 848 pages.

[edit: typo ("Secientific"-I have a bad case of it today). The "Encyclopaedia" is how it is.]
 
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Jraef said:
But look at your first response carefully. You put "KHW", not KWH and you did it twice! Surely you don't espouse changing the order of the words as well!

(and I'll call you Shirley if I want to!) :wink: :grin:
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Are you trying to moderate the moderator? Is that even allowed? :grin:
 
Jraef said:
But look at your first response carefully. You put "KHW", not KWH and you did it twice!
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Shucks. Now I am going to have to admit this error at my next meeting of the EDA (Engineers Against Dyslexia). ;)
 
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