Power Factor Explained - The basics what is power factor pf
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Date: 2023-11-17
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Comments and reviews: 30
Rajan
Hello Paul,
I spent 8 hours today trying to learn Power Factor from my course notes and text book. Became really highly frustrated because nothing made any sense.
Then I watched and studied your videos. I first went through Resistance, Capacitors, Inductors and Induction Motors and then I did your entire Power Factor Video including all calcs.
I starting with your videos at 22. 00 on Monday night. Its now 03. 34 on Tuesday morning and I can now say that I have mastered Power Factor.
WITH ALL MY HEART, THANK YOU PAUL. YOU ARE MY SUPER-HERO.
Your Videos are super fantastic. Please keep up the Excellent work!
Regards,
Rajan.
South Africa
reply
Hello Paul,
I spent 8 hours today trying to learn Power Factor from my course notes and text book. Became really highly frustrated because nothing made any sense.
Then I watched and studied your videos. I first went through Resistance, Capacitors, Inductors and Induction Motors and then I did your entire Power Factor Video including all calcs.
I starting with your videos at 22. 00 on Monday night. Its now 03. 34 on Tuesday morning and I can now say that I have mastered Power Factor.
WITH ALL MY HEART, THANK YOU PAUL. YOU ARE MY SUPER-HERO.
Your Videos are super fantastic. Please keep up the Excellent work!
Regards,
Rajan.
South Africa
reply
Filipe
Well, I got a problem with the beer analogy:
In my city, we are billed for the active power (P) and not by the apparent (S. If we do have a power factor below 0. 92, we do get an penalty tax.
But, in logic, reactive power is not energy waste (besides losses in wires by higher current. We just are consuming less power.
I would improve the beet analogy by thinking in drinking beer from a barrel.
In each glass you consume less than you could but the amount of beer that you don't drink remains in the barrel so it is not wasted.
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Well, I got a problem with the beer analogy:
In my city, we are billed for the active power (P) and not by the apparent (S. If we do have a power factor below 0. 92, we do get an penalty tax.
But, in logic, reactive power is not energy waste (besides losses in wires by higher current. We just are consuming less power.
I would improve the beet analogy by thinking in drinking beer from a barrel.
In each glass you consume less than you could but the amount of beer that you don't drink remains in the barrel so it is not wasted.
reply
na
Very nice video and impressive; i am not an electrical engineer but i can easily understand what you explained; thanks a lot; I am selling LV static var generator(svg) and active power filter(apf, which are mainly used for reactive power compensation, improving power factor, filter harmonic wave, and keep three phase balance; I can use your beer theory to explain the definition of pf and relationship of active power, apparent power and why svg could improve pf and save electricity bill; it is very usefulthanks again
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Very nice video and impressive; i am not an electrical engineer but i can easily understand what you explained; thanks a lot; I am selling LV static var generator(svg) and active power filter(apf, which are mainly used for reactive power compensation, improving power factor, filter harmonic wave, and keep three phase balance; I can use your beer theory to explain the definition of pf and relationship of active power, apparent power and why svg could improve pf and save electricity bill; it is very usefulthanks again
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Mark
Can anyone tell me how the apparent power is known on the way in to building during design phase?
During design calculations, is the installation designed according to true power or apparent power?
How do we know power factor at design phase to accommodate kVAr and thus kVA?
And given this, where on circuit can power factor correction be applied?
Thanks guys in advance.
I'm still going to browse other videos but this one is pretty great.
Ever reliable engineering mindset.
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Can anyone tell me how the apparent power is known on the way in to building during design phase?
During design calculations, is the installation designed according to true power or apparent power?
How do we know power factor at design phase to accommodate kVAr and thus kVA?
And given this, where on circuit can power factor correction be applied?
Thanks guys in advance.
I'm still going to browse other videos but this one is pretty great.
Ever reliable engineering mindset.
reply
Ignis
A prof of mine used to remark about the beer analogy that it's actually wrong. He had an edited version of the correct represenation then on the beamer to our amusement, which was based on stretching the image of the beer into the shape of a triangle (sans the hypotenuse, because apparent power is the sum of the sqares of true and reactive power. Gotta admit that image has stuck with me and is my frist thought whenever seeing it done wrong. ;)
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A prof of mine used to remark about the beer analogy that it's actually wrong. He had an edited version of the correct represenation then on the beamer to our amusement, which was based on stretching the image of the beer into the shape of a triangle (sans the hypotenuse, because apparent power is the sum of the sqares of true and reactive power. Gotta admit that image has stuck with me and is my frist thought whenever seeing it done wrong. ;)
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Chinmay
I am an IT engineer, but I am facing some issues with borewell pump at my home. The pump is 3 phase 5hp which should be 3. 8KW. But in my electricity bill I am getting maximum demand over period of 15 mins as 5. 7KW and changed penalty as my sanctioned load is 4KW. Iam not getting how the demand is 5. 7KW when pf is. 86 and amperes is 9. 6amp. Can someone help me calculate?
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I am an IT engineer, but I am facing some issues with borewell pump at my home. The pump is 3 phase 5hp which should be 3. 8KW. But in my electricity bill I am getting maximum demand over period of 15 mins as 5. 7KW and changed penalty as my sanctioned load is 4KW. Iam not getting how the demand is 5. 7KW when pf is. 86 and amperes is 9. 6amp. Can someone help me calculate?
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Trn
Sorry sir! I have wonder at 2: 34 when you show the Engineering Formulas Table, in the first point you write True Power = Reactive Power x cosp that's mean P = Q x cosp. But in the last point you show that cosp = P/S. Is there any mistake at this point? And in the Triangle if add the pitagor Fomulas that will be cosp = P/S also. please explain for me sir. Thank you too much!
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Sorry sir! I have wonder at 2: 34 when you show the Engineering Formulas Table, in the first point you write True Power = Reactive Power x cosp that's mean P = Q x cosp. But in the last point you show that cosp = P/S. Is there any mistake at this point? And in the Triangle if add the pitagor Fomulas that will be cosp = P/S also. please explain for me sir. Thank you too much!
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Yani
I am convinced that we do NOT need UNIversity
We can learn here for free
And my UNIversity play YT vids all the time insted of teaching.
kind of sad that i gave away so much money and didnt lear a thing
And now have to lear for free on YT and with 1 vid lear everything faster and better.
Just disapointed.
Love you man!
reply
I am convinced that we do NOT need UNIversity
We can learn here for free
And my UNIversity play YT vids all the time insted of teaching.
kind of sad that i gave away so much money and didnt lear a thing
And now have to lear for free on YT and with 1 vid lear everything faster and better.
Just disapointed.
Love you man!
reply
Daniel
This is the best way I've seen power factor and VARs explained. The beer analogy was genius. I tried to explain power factor and VARs to someone and found it difficult to lay out the concept without getting into inductive and capacitive reactance. The beer analogy cuts through all of that into a digestible concept for the average person.
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This is the best way I've seen power factor and VARs explained. The beer analogy was genius. I tried to explain power factor and VARs to someone and found it difficult to lay out the concept without getting into inductive and capacitive reactance. The beer analogy cuts through all of that into a digestible concept for the average person.
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Arve
Power factor penalty works also the other way ie overcompensated network, which the power companie can tolerate to a certain degree. They in turn will have to use compensation ie inductive loads. This has alot to do with underground cables which is inherently capacitive loads not regarding the load connected.
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Power factor penalty works also the other way ie overcompensated network, which the power companie can tolerate to a certain degree. They in turn will have to use compensation ie inductive loads. This has alot to do with underground cables which is inherently capacitive loads not regarding the load connected.
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Santonio
I'm very thankful on how well you explain the concept as now even though I'm currently struggling in my circuits course, I'm able to realize and connect different concepts in an ac circuit especially about this power factor. Kudos to you and look forward to watching more of your videos.
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I'm very thankful on how well you explain the concept as now even though I'm currently struggling in my circuits course, I'm able to realize and connect different concepts in an ac circuit especially about this power factor. Kudos to you and look forward to watching more of your videos.
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Vikezupa
Although I get itI never liked the beer analogy.
A better analogy (for me anyway) is guy pulling a train car with a rope at an angle.
The closer to pf = unity, the closer the guy gets to pulling the train car straight on.
But, thats just me.
Otherwise, excellent video.
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Although I get itI never liked the beer analogy.
A better analogy (for me anyway) is guy pulling a train car with a rope at an angle.
The closer to pf = unity, the closer the guy gets to pulling the train car straight on.
But, thats just me.
Otherwise, excellent video.
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Erilyn
I don't get, (in the beer analogy) if the apparent power is the combination of the foam and the beer, how come the apparent power increases when there's more foam? it will always be 1 glass of beer right so the apparent power is the same? please anyone correct me if i'm wrong
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I don't get, (in the beer analogy) if the apparent power is the combination of the foam and the beer, how come the apparent power increases when there's more foam? it will always be 1 glass of beer right so the apparent power is the same? please anyone correct me if i'm wrong
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Wind
I understood everything including the math this video is not for entry level ppl hahaha
got to already know something about electrical to understand this. I can imagine that for most who dont know this would need more pictures in the video lol thanks for the video
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I understood everything including the math this video is not for entry level ppl hahaha
got to already know something about electrical to understand this. I can imagine that for most who dont know this would need more pictures in the video lol thanks for the video
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Fabian
0: 52 thats why beer glasses are calibrated measuring instruments in Germany where you have to be able to verify if the beer is properly filled till the top and not just foam, so stone pitchers are forbidden by law as you cannot verify the beer level.
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0: 52 thats why beer glasses are calibrated measuring instruments in Germany where you have to be able to verify if the beer is properly filled till the top and not just foam, so stone pitchers are forbidden by law as you cannot verify the beer level.
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Arnel
Why are my diaphragm air pump pulling 2x as much as the rated power? I have 4 pump running at the same time, 2x 85w+ 1x 55w + 1x 22w. So the total is supposed to be 247w or 1. 12amps. But why my ammeter is constantly reading at 2. 2amps?
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Why are my diaphragm air pump pulling 2x as much as the rated power? I have 4 pump running at the same time, 2x 85w+ 1x 55w + 1x 22w. So the total is supposed to be 247w or 1. 12amps. But why my ammeter is constantly reading at 2. 2amps?
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onglogman
Question from a dummy (me): could the power factor be called electrical efficiency or just efficiency? As in like a 100w light buld, could be 90% efficient giving off 90% light and 10% heat. would that be a power factor of 0. 9?
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Question from a dummy (me): could the power factor be called electrical efficiency or just efficiency? As in like a 100w light buld, could be 90% efficient giving off 90% light and 10% heat. would that be a power factor of 0. 9?
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xxhellspawnedxx
I believe you skipped a step. Capacitors are not rated in kVAr, but in Farad. I know there's a forrmula for calculating it, but it escapes me at the moment. Anyways, quite a decent topping-up of one's electro-physics: )
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I believe you skipped a step. Capacitors are not rated in kVAr, but in Farad. I know there's a forrmula for calculating it, but it escapes me at the moment. Anyways, quite a decent topping-up of one's electro-physics: )
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Zapgod
Ive always wondered why while monitoring electric plant loads, the math dont add up when base loading 1 generator to 80% and the other 2 in parallel are at 20%. Calculations cant be achieved algebraically, only vectorially.
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Ive always wondered why while monitoring electric plant loads, the math dont add up when base loading 1 generator to 80% and the other 2 in parallel are at 20%. Calculations cant be achieved algebraically, only vectorially.
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Chris
I've seen swimming pool pump motors with power factors on the equipment tag/plate that say they have higher power factors. I've seen anywhere from 1. 1 to 1. 25 on 220v Motors with Start/Run Capacitors. How does that work?
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I've seen swimming pool pump motors with power factors on the equipment tag/plate that say they have higher power factors. I've seen anywhere from 1. 1 to 1. 25 on 220v Motors with Start/Run Capacitors. How does that work?
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Scott
I'm about to start my final year project on automatic power factor correction, thinking I might have bitten off more than I can chew lol. Thanks for the upload, gives me a better understanding of the issue at hand.
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I'm about to start my final year project on automatic power factor correction, thinking I might have bitten off more than I can chew lol. Thanks for the upload, gives me a better understanding of the issue at hand.
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Sam
This may be the single best electrical engineering video I have ever seen. Such a clear and practical explanation of what is one of the most complex but fundamental concepts in electricity. Love this.
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This may be the single best electrical engineering video I have ever seen. Such a clear and practical explanation of what is one of the most complex but fundamental concepts in electricity. Love this.
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Arjen
In the example of the induction motor comparison, could you power those motors with a 10KVA solar panel and a converter that outputs the amount of apparent power needed for the motor?
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In the example of the induction motor comparison, could you power those motors with a 10KVA solar panel and a converter that outputs the amount of apparent power needed for the motor?
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brnmcc01
Now explain to us how a static VAR compensator works: ) Used a lot in industrial facilities that for example do a lot of arc welding or steel foundries with electric arc furnaces.
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Now explain to us how a static VAR compensator works: ) Used a lot in industrial facilities that for example do a lot of arc welding or steel foundries with electric arc furnaces.
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Chithravel
Sir I have one Request, You have already Started you tube in All language Please also Start Tamil Language, why because it would be helpful for who Doesn't Know English
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Sir I have one Request, You have already Started you tube in All language Please also Start Tamil Language, why because it would be helpful for who Doesn't Know English
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Mobile
Superb. At 2: 37 there is definitely something not right: geometrically, the rule X = r cos(theta) means that the formula for TruePower should be ApparentPower x cos(theta.
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Superb. At 2: 37 there is definitely something not right: geometrically, the rule X = r cos(theta) means that the formula for TruePower should be ApparentPower x cos(theta.
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Ghanshyam
I am speechless sir, I am an electrician, if it is possible to go back on time I am going to learn electrical engineering from you. Seriously you are out of this world
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I am speechless sir, I am an electrician, if it is possible to go back on time I am going to learn electrical engineering from you. Seriously you are out of this world
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Gevin
You did not explain what is power factor? You explained its Martha and graphs etc. Actually what is it? Who is it generated in electrical power generation?
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You did not explain what is power factor? You explained its Martha and graphs etc. Actually what is it? Who is it generated in electrical power generation?
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ARTmania
2. 41 make a correction in TRUE power formula, Where KVA is apparent power, But mentioned as reqxtive power. this one strikes my mind for minutes tho
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2. 41 make a correction in TRUE power formula, Where KVA is apparent power, But mentioned as reqxtive power. this one strikes my mind for minutes tho
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Hasse
A kVAr-capacitor? I'm into electronics and in our world, we measure capacitance by the Farad or fractions of Farads. What's the conversion factor?
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A kVAr-capacitor? I'm into electronics and in our world, we measure capacitance by the Farad or fractions of Farads. What's the conversion factor?
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