Power Factor for AC Pumps

[mrhasan]

Originally Posted by mike31154

For the average home owner, the power company loses with respect to PF, not the consumer. Pretty certain that large industrial customers are billed extra when their equipment includes many large inductive loads such as AC motors.

My logic is, even if the PF is included in their calculation, it got to be the pf of the whole house and not the individual motor. Generally, that gets to above 0.9.

[mrhasan]

Originally Posted by sphelps

While the pump is pulling 1.8A it's not using it all, essentially most of it is going back to the grid so to speak.

That's only applicable in some microgeneration programs. You are pulling out 1.8A through the pump and hence its yours. And more or less, the whole current is consumed by the motor other than some leakages.

[sphelps]

Originally Posted by mrhasan

http://www.enmax.com/Power/Tariffs/P...or/default.htm

This might help you a bit for now. My colleague is still not here and I am not sure how Alberta is billed with PF like whether they consider any ratio or just unity pf in the grid. I will get the info from him and confirm the ratio.

That sounds like its only applied to commercial use, being billed based on kVA and not kW.

[mrhasan]

Originally Posted by sphelps

That sounds like its only applied to commercial use, being billed based on kVA and not kW.

I am still confused about those components. Will get to you with the right stuff.

Electric companies will not be able to determine individual PF of all the devices and hence, even if they use any PF it is going to be an average of the whole house or just unity factor. I will get back to you after 12pm or something regarding this. My prof should be the best person to clear it up

[sphelps]

Thanks let me know

I can't tell you how ****ed I'll be if this pump is actually costing me over 200W of power.

[mrhasan]

Originally Posted by sphelps

Thanks let me know

I can't tell you how ****ed I'll be if this pump is actually costing me over 200W of power.

Easiest solution: move to DC motors. :P

I talked with a friend of mine from montreal and he said you are going to be billed for 1.85 * 115 * number of operating hours, theoretically. I will keep you updated

[sphelps]

Well this is looking awesome, 65 Watt max stamped right on the $700 pump, meanwhile it's using over 200 Watts.

[mrhasan]

Originally Posted by sphelps

Well this is looking awesome, 65 Watt max stamped right on the $700 pump, meanwhile it's using over 200 Watts.

Hold on no need to get excited about it I haven't confirmed it yet.

[sphelps]

Hurry up, the large hammer I'm holding above the pump is getting heavy

[mike31154]

Nothing to confirm if you've measured consumption at 200 watts, other than what's stamped on the motor is evidently false info....