Hello, Our association is seeking to squeeze the little industrial equipment. we am we do the cost/profit research as well as perplexing to figure out energy usage. Both inclination run off of 208v 3 phase. Total use is 29.2 amps running. For example, To figure out kwH for singular proviso energy we take 120(volts) x 10(amps) gets we 1200 watts, times 1(hour) widely separated by 1000 = 1.2kwH if we recollect correctly. Now, my question, how do we figure out 3 proviso kwH? do we greaten by 208 for 1 phase, or 624 for all 3 phase’?
I can figure out what the price per kwH is, only need to know how to figure out to get kwH from the 3phase device.
Thank you,
Jason
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Apparent power (which is what the utility is charging you for) is often more than the Active power (which is what your machine is using to turn into mechanical work).
For a three-phase system:
(Apparent power) = kVA = (Sqrt 3)*(V)*(A)/1000
(Active power) = kW = kVA * PF
… where PF is the machine’s ‘power factor’, a number between 0 and 1.
In your case, you have 208 V and 29.2 A (and some unidentified power factor).
Apparent Power = (Sqrt 3)*(208)*(29.2)/1000 = 10.5198 kVA
The proposed 3Ø, 120/208V equipment draws 29.2 amps.
.208 kV * 29.2 A * √3 = 10.5 kVA
Assuming a power factor of .85, the real power is 10.5 * .85 = 8.94 kW
Once you’ve got kW (or kVA) it doesn’t matter if the equipment is 1Ø or 3Ø, the billing calculations stay the same. Just multiply by the number of hours of operation to get kWh (or kVAh).
As you analyze your costs, keep in mind that many utilities also have a demand charge. This charge can be rather significant and is usually on top of the kWh or kVAh energy usage.
The demand charge is based on your highest kW or kVA usage over a 15 or 30 minute interval. If these two new pieces of equipment are going to run continuously, they will each add 9 kW or 10.5 kVA to your demand charge.
you just see the equipment watts
eg: 100w bulb use for 1 hr it consume 1unit of electricity i.e. 1kw of electricity.
if you have 3ph equip you need 1kw equipment
this 1kw is divided to 3 phase coils
more u tell as we clear the things then we sort out what you exactly want.