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John T. Buickand Deere other electrical engineers

W

wilson ind

Well-known Member
Noticed advertisements for some kind of a dingus to cut electrical use and thus cost. Said to do something with balancing sine wave. Your educated opinion please. I think with new meters even the old magnet placed on meter will not work
 
Power factor correction device probably. Since your house meter is measuring kWh it won't have any effect on the bill.

In an industrial application with lots of inductive loads power factor correction can have substantial impact on power costs.
 

The paper mill I retired from had some very large refiner motors, 7,500 hp, and they were frequently idled during the daytime when electrical costs were high. They said it was better to let them idle, it balanced out the sine wave. And, starting them was spectacular, The lights would dim, and the floor would tickle you feet 50 feet away! They would run all night and keep the pulp tanks full, as the paper machines ran 24/7, I only remember them being curtailed once because of a power shortage, it was 100 F, and us maintenance people had to work overtime doing repairs.
 
As noted by others, the home electrical energy use is not primarily powerfactor loading. (phase shift) thus almost no savings can be made with purchased devices. A google search provides an assortment of energy consumption reducing ideas, these are normal ideas like motion sensors and better lighting systems for more light/less watts. Some are just snake oil. The $85 air conditioner is in the category. Just an evaporator with a blower pushing humidity into dry air for cooling. Imagine that working where the air is near 80% humidity already. Not. Jim
 

Maybe ........
If as previously stated . It is power factor correction for induction motors , magnetic lamp ballasts , battery chargers , welders etc . Then yes if enough capacitance is added at the motor , welder etc to obtain a power factor of between 0.9 and 1.0 .
This will reduce the unused reactive current flow between the motor and the power utility transformer .
Less current means you are paying less to produce waste heat just to make the wires warm .
If it is just some flashing dingaling that plugs into a wall outlet . Then somebody should find the vendor and stick that power saver where it belongs .
 
Hi ex Neighbor, when I worked at a huge Naval Industrial plant (NSWC Crane) the utility charged us HUGE fees for our lousy Power Factor caused by our having so many big motor loads but our adding of Power Factor Correction Capacitors really helped. I have no idea how you are being billed but it may not make any difference whatsoever if you were to add the same. IE while they may improve the Power Factor you may not save a penny on the electric bill??

John T
 
Hey John, I know its off topic but is there a big ship on the lake at crane or is it Hoosier folklore?
 
I have been there on and off 40 years and fished and boated all over Lake Greenwwod, its very shallow in the center I never saw any big ships

John T
 
Figured it was a legend. Back in the late 50s my dad use to help unload bag fertilizer st the train depot . There was a spur line that went to crane and dad said alot of stuff was shipped to crane and some and guards riding along.
 
Synchronous motors were commonly used years ago to help correct lagging power factor. Best suited in applications where they run continuously, they were commonly used in motor generator sets to create DC back in the day before solid state rectifiers.
 
That spur went past my grandfathers farm. Yea some strange rail cars both ways. No deep lakes as sub tests were preformed about ten miles west of me in very deep strip pit. They used local crane to raise and lower experiment what ever it was. Crane base of course very private in many aspects yet very good and friendly for local area. During WWII most farmers were declared exempt yet strongly encouraged to take civilian jobs on base. My father was iron worker building amo storage caves while an uncle was a mechanic. Many became permanent workers, however and rightly so ex military were given priority. In collage I went into Lafayette Ind Iron worker union hall to get summer work. Grumpy old union boss started in bitching about in experienced collage kids wanting work with no experience. I stated know what you mean My dad Jim Wilson said back in 1942 through 45 you started out as a miserable pup for him, didnt know your butt from a hole in the ground. My the way my uncle Raymond Griffith is union president In Terre Haute. I went to work on good job for next two summers!!!!!!!!!!
 
(quoted from post at 11:57:47 07/07/20) Your power company is probably not charging you for poor power factor and the savings may be zero.
Click to expand...

Even if the utility blends the reactive power charge in with the actual power bill. There would be minor savings with an improved PF.
For example a run of cable with 3% voltage drop and a 20 amp load would be heating the cables with 144 watts of lost heat.
Reduce the current to 16 amps with corrected power factor and the heating loss would be 92 watts.
If that was running 8 hrs a day , 5 days a week, 50 weeks of the year. The power lost would be 288Kw vs 184Kw. At 22 cents per kwh here. That would save $23 a year .
 
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