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#1
09-22-2007, 02:11 PM
 unone Guest Posts: n/a
how to convert amps into kwh usage

i need to convert ampere of usage into kwh
#2
09-22-2007, 07:38 PM
 gubment_cheez Ultimate Supreme Bacon Cheese Member Join Date: Jan 2007 Location: Sac-o-Tomato, Cowafornia Posts: 354 Rep Power: 8
Re: how to convert amps into kwh usage

an ampere is an instantaneous measurement, while KWH is a measurement of watts (in this case, kilowatts) over time. it's like converting linear feet to cubic feet, you just can't do it
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#3
02-19-2008, 05:39 AM
 Unregistered Guest Posts: n/a
Re: how to convert amps into kwh usage

converting amps to kwh requires multiple equasions, for example i will show the process for converting the amps used by a 100 watt bulb in a 115/120 volt powered circuit.
E=IxR states that volts are equivilent to amps X watts
So inversly volts divided by watts = amps
in this case 120 volts divided by 100 watts =1.2 amps
that given and adding that kwh=1000 watts used for 1 hr
so inversly a 1.2 amp load used continuosly for 1 hr = 100watt hours or 0.10kwh

I hope that helps
#4
03-29-2008, 03:40 AM
 Unregistered Guest Posts: n/a
Re: how to convert amps into kwh usage

Quote:
 Originally Posted by unone i need to convert ampere of usage into kwh
I have a motor drawing 4.7 amps at 120V. What is my kwh usage
#5
03-29-2008, 09:55 AM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,536 Rep Power: 19
Re: how to convert amps into kwh usage

Quote:
 Originally Posted by Unregistered I have a motor drawing 4.7 amps at 120V. What is my kwh usage
It depends on how long it runs. Instantaneous power is 4.7 A x 120 V = 564 W or 0.564 kW.

Therefore it uses 0.564 kWh/h. Multiply by hours operated and you will have your answer.
#6
03-08-2009, 08:02 AM
 Aayush Guest Posts: n/a
Re: how to convert amps into kwh usage

I think JohnS method should be helpful to you...
#7
03-24-2009, 01:42 PM
 Unregistered Guest Posts: n/a
Re: how to convert amps into kwh usage

Quote:
 Originally Posted by gubment_cheez an ampere is an instantaneous measurement, while KWH is a measurement of watts (in this case, kilowatts) over time. it's like converting linear feet to cubic feet, you just can't do it
KWH is a measure of energy, not power. it is kilowatts* hours.
#8
08-16-2009, 07:51 AM
 Unregistered Guest Posts: n/a
amps-kwh

if i reduce the amps rate by an energy saver will kwh will reduce
#9
08-16-2009, 08:33 AM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,536 Rep Power: 19
Re: amps-kwh

Quote:
 Originally Posted by Unregistered if i reduce the amps rate by an energy saver will kwh will reduce
kWh = volts*amps*hours/1000

If you reduce the amps, the energy consumed will be less UNLESS it runs longer (for example, something controlled by a thermostat that runs until it reaches a temperature.)

Picky note: above is only correct if current is in phase with voltage and constant. If current varies or turns on and off with a switch (thermostat) it is a little more complex.
#10
08-17-2009, 03:32 AM
 wengg@kores-india.com Guest Posts: n/a
Re: how to convert amps into kwh usage

Quote:
 Originally Posted by unone i need to convert ampere of usage into kwh
. one main feeder is loading 1000 amp. please let me know with formula how much kwh consumption.

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