Energy Smart Products [RE-wrenches]
Ray Walters
remotech at taosnm.com
Wed Apr 4 21:16:25 PDT 2001
Hi Folks:
We also tested the Power Planners on grid and off. They have a phantom
load. They don't change power factor or any other aspect measured by a
Brand meter especially total watts. Voltage measured on an Oscilloscope
though, they take a small notch out of the sinewave curve about 1/3 of the
way before peak.(at 60 degrees if peak is at 90 and zero occurs at 0 and 180)
"Soft Start" lowering of peak amp draws for induction motor starting?
Forget it. We actually saw peak watts increase in some tests.
But I LOVE my Brand meter. Try doing load analysis of computers or
flourescent lights without measuring power factor; you are going to be way
off.
Ray
Remote Tech
Carson, NM
At 09:08 PM 4/3/01 -0600, you wrote:
>The devices you are referring to are power factor controllers that decrease
>the running voltage to induction motors to reduce current and thus real
power.
>Lightly loaded induction motors can run at reduced voltages and reduce
>current draw. A 1 hp motor becomes a 1/4 hp motor when the voltage to it is
>cut in half. All these devices do is reduce the voltage enought to load the
>motor 100% thus cutting I*2R losses. They work on old motors with high
>service factors or motors that are bigger than required for the load. Most
>newer appliances have little improvement with these as they are not over
>designed electrically.
>
>> > Does anyone out there have any experience with "Power Planners" made by
>> > Energy Smart.
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