AC Theory: How to Calculate Power Factor in an AC Circuit: What is Power Factor?

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  • Опубліковано 31 гру 2024

КОМЕНТАРІ • 93

  • @Lichfeldian--Suttonian
    @Lichfeldian--Suttonian Рік тому +3

    FINALLY, a video that explains it all using ONE right-angled triangle, that in fact, each in the three is (effectively) the same animal.
    cos θ (or ϕ for phase angle), ° = Adjacent/Hypotenuse = VR/VT = R/Z = W/VA = Power Factor.
    Where θ (or ϕ for phase angle) = 0°, VL = 0, X = 0, VAr = 0. This is a DC (direct current) circuit.
    Thank you for the best clarity that I have seen to date!

  • @triplerjm2353
    @triplerjm2353 4 роки тому +6

    I would like to thank you Joe for all your series of video uploaded and I spent my last 10 days going through them in order to be ready for my Adv Sc Princ L3 at Optima London Training Centre , I have smashed it. Thank you Thank you Joe. you don't know how many of out there who are taking advantage of your video. May God continue to give the courage, and enough energy upon years coming Joe.

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому +1

      Wow, what an incredible comment. So glad the videos have been helpful to you, it's hard work but it's great to know that people are benefitting from them. 😊

  • @ericweenink7578
    @ericweenink7578 Рік тому +2

    Your videos are very much appreciated. I’ve been struggling with A/C theory in my power engineering for weeks. Trying to wrap my head around everything. Your videos laid it out perfectly and it makes perfect sense. Thanks man, this will go a long way in helping me pass my test next week.

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  Рік тому

      I'm just really glad they've helped Eric, it makes it all worthwhile, thank you so much for chipping in financially, it's very much appreciated. Let me know how you get on with your test yeah? 💪

  • @gav2487
    @gav2487 4 роки тому +4

    Finally a video that deals with this topic in a simple but complete and in-depth way! Thanks for all your phenomenal videos that deserve a thumbs up.

  • @mahmoudalphysics7494
    @mahmoudalphysics7494 Рік тому +1

    I am so sorry that I don't know such a proper way to thank you for your impressive work, please keep going

  • @sooslikas
    @sooslikas 2 роки тому +1

    this video is the holly grail of your ac theory thalmud bro! I feel enlightened and calm like a bhuudahh before my exam! Feelin' like ZEUS allready! ( he was the first sparky ever , innit)

  • @zacharybob4336
    @zacharybob4336 2 роки тому +3

    Sure appreciate your efforts in these videos Joe, makes a world of difference to supplement my Electrician apprenticeship coursework with your teachings.

  • @lexluther971
    @lexluther971 3 роки тому +1

    Hey wonderful joe I wz really fearing this subject I wz hoplessly thinking I wz gonna get lost but listening to you giving me a great hope .Im a 68 yr old trying to get my head around this for my Electrical theory level 3 nite class.Thank you so much I can do this now wth comparative ease yahooee

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  3 роки тому

      Ah brilliant, there's loads more on there about AC Theory to help deepen your understanding, hope it helps and keep us posted on your progress!

  • @Antiquity_Zine
    @Antiquity_Zine Рік тому

    Very informative. I’ve learned more from this short video than the past few weeks from my instructor. Crunching numbers doesn’t always add up.

  • @ranjan1436
    @ranjan1436 4 роки тому +4

    Awesome, you make things so simple. Looking forward to your next video on the sizing of the Capacitor needed to improve from low Pf also the required KVAR.

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому

      Thanks for the feedback, the next three Sunday videos will build up to that.

  • @pault4793
    @pault4793 4 роки тому +7

    considering i ve been a spark for 30 years, still a good sunday morning watch, never stop learning . good video

  • @ianclark8194
    @ianclark8194 4 роки тому +7

    Fantastic video as always Joe. It's great to see new ways of delivering a sometimes difficult and confusing subject to present. I find myself talking back to you which the wife finds quite amusing. Keep up the good work

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому

      Thanks Ian, it's the result of wrestling with the subject myself for about 11 years. Keep chatting back on screen and feeding back in person!

    • @thedavesofourlives1
      @thedavesofourlives1 3 роки тому

      better than sports

  • @eddieking7736
    @eddieking7736 4 роки тому +2

    Clear explanation, your videos are top notch, thank you.

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому

      My pleasure, glad they make sense, always a bit tricky to know when you're talking to a camera on your own!

  • @mitchellshallcross1369
    @mitchellshallcross1369 4 роки тому +4

    Great timing, currently going over this at college. Great video for continuing my development. Thanks
    Wanting top mark in the end of yer exam ha

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому +2

      Good lad, if you want anything going over feel free to make a suggestion. Hope you get the top marks bud, let me know!

  • @munafmufc01
    @munafmufc01 Рік тому +2

    Joe...you should be given a knighthood for all your helpful videos. They are very clear and concise. So helpful for apprentice and students like me. Thank you.

  • @GSHElectrical
    @GSHElectrical 4 роки тому +3

    Fantastic as always Joe 👍

  • @edsherwood2173
    @edsherwood2173 3 роки тому

    I’m going through AC theory now and man I wish I had you as a teacher. Thanks for the videos you got a new subscriber, keep them coming

  • @sahilyo4
    @sahilyo4 2 роки тому

    this video made things so easy for me. really simple

  • @jadenjosea7261
    @jadenjosea7261 2 роки тому

    thank you for all these videos, you explain them so well and make it easy for us.Thanks alot keep on giving these lessons

  • @kilyobasbinga7552
    @kilyobasbinga7552 7 місяців тому

    By the way, I really appreciate your excellent video presentation

  • @Javier-u8p
    @Javier-u8p 9 місяців тому

    Sir, thank you for this lesson. It's helped me a lot.

  • @jakedavey5211
    @jakedavey5211 2 місяці тому

    this was incredibly helpful

  • @djchameera
    @djchameera Рік тому

    love these vids helps a lot to learn as a apprentice

  • @kabandajamilu9036
    @kabandajamilu9036 4 роки тому +1

    So nice and educative sir keep it up 100%nice

  • @YangobingYana-d6r
    @YangobingYana-d6r Рік тому

    Simple and very conceptual❤

  • @tedlahm5740
    @tedlahm5740 2 роки тому

    Three different formulas for power factor. thank you.

  • @kilyobasbinga7552
    @kilyobasbinga7552 7 місяців тому

    In power factor correction, are we correcting the phase difference between the current and voltage of the public power supply company or is it correction of the inductive loads which could be water pump or any other kind of load. Secondly, do resistive loads have phase difference? Does it mean when the loads are purely resistive the power factor is at its maximum theoretical value of 1?

  • @casadelrin2966
    @casadelrin2966 Рік тому

    yhis is great man. thank you so much. you are a great teacher!
    Also, electrical engineering can be freakin confusing and overwhelming

  • @traviswhaling7870
    @traviswhaling7870 2 роки тому +1

    Joe great video, How do I watch these in series? I generally search the problem I am trying to figure out but then find there is more to it that I should have watched earlier. Is there a way to find the previous videos that would lead up to this?

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  2 роки тому

      Hi Travis, thanks for watching and commenting, if you check out my AC Theory playlist below it covers all that I've done on this subject so far. 😊 Check out my other playlists for other electrical topics. 👍
      AC Theory: ua-cam.com/play/PL7eNzIRgKe07BOqPH7MrrKy89M3o4wU-2.html

  • @abumusa6093
    @abumusa6093 3 роки тому

    Your videos are fantastic and super helpful! Thank you so much Joe.

  • @claudiod.7385
    @claudiod.7385 3 роки тому

    Simple, complete and therefore very good explanation. Only one question: Where do I find the power factor information on a, let say, laptop external or internal transformer or any other transformer and how do I in practice verify/measure it ? Keep in mind that sometime the transformer's power is not specified, typically on laptop's ones. Thank you.

  • @salvatoredibenedetto6742
    @salvatoredibenedetto6742 2 роки тому

    thank you joe very helpful

  • @TheSpuggiehawk
    @TheSpuggiehawk 2 роки тому

    So, the general case would be that you have an inductive circuit, so the current is lagging the voltage. If a capacitor is used to correct this, does that (for want of a better description) push the current forwards to bring them into phase at 0 degrees offset, or does it push the current back, so it is out of phase by -360 degrees, but lines up nicely :-) ? Either way would work and the cycles would be in sync, but does it matter?

  • @stephenboden3558
    @stephenboden3558 4 роки тому +3

    Hi Joe. Thank you for taking the time to produce great and explanative videos. I'm about to start Level 3 at college, although it may be at home at some point. Is it possible for you to cover Kirchoff's Law? Both Current and Voltage...TIA

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому

      You are more than welcome. I'll add Kirchoff's Law to my to do list.

  • @kevbudgie1
    @kevbudgie1 22 дні тому

    Hi Joe, would you be able to help with a pf question and the formula?
    In a circuit with a 4ohm resistor and a 10mH inductor what is the power factor.

  • @mikatomik5532
    @mikatomik5532 4 роки тому +1

    So, question. Why then in the lamp schematic is the correction capacitor on a switch? Is there some disadvantage to having it hardwired in from the factory?

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому +1

      Great question, that switch doesn't exist in fluorescent light fittings normally, it was installed for demonstration purposes to show how connecting and disconnecting the capacitor affects the light fitting and currents etc.

    • @mikatomik5532
      @mikatomik5532 4 роки тому +1

      Joe Robinson Training Ahhh, of course. I should have known that! I’ve (almost) watched this whole series over the past few days, while I’ve got you here I’d like to say thank you for putting all of this work in to share knowledge with us. It is greatly appreciated as I am an industrial mechanic looking to cross train as a sparky and I believe this will put me well ahead of the curve to be a Michelin certified sparky. I cannot thank you enough.

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому +1

      My absolute pleasure, glad they're helping a bit, feel free to spread the word, seems like a good time to start doing some CPD from home!

    • @mikatomik5532
      @mikatomik5532 4 роки тому

      Joe Robinson Training you got it! Stay safe!

  • @markrowland5393
    @markrowland5393 4 роки тому +2

    Hi Joe. Excellent as always but I also got a bit confused when you said a capacitor generates inductive impedance albeit you did say in the opposite direction.

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому +3

      Sorry, should have said capacitive reactance, thanks for the spot, I've added a note in the description.

  • @TIGREinVOLO
    @TIGREinVOLO 3 роки тому

    Can you please make a video on generator set power factor? I don't quite get how a genset can have power factor and how can that be corrected, so that I can maximise the usage of the output power. I thought loads have power factor, not sources. Thank you

  • @jamesward9570
    @jamesward9570 Рік тому +1

    Terrific thanks

  • @no_short_circuit
    @no_short_circuit 4 роки тому +3

    Thanks Joe. I've followed and understood all these videos. At 11:44 you say "a capacitor generates inductive reactance". In earlier videos you say that a capacitor generates capacitive reactance. I'm confused now.

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому +1

      Sorry! I'm a doofus, should have said capacitive reactance! I've added a note in the description. Thanks.

  • @jamesward9570
    @jamesward9570 Рік тому +1

    Thank joe

  • @nicholasmifsud8816
    @nicholasmifsud8816 4 роки тому

    Hi Joe, first of all I would like to say thanks for your videos I really like your teaching methods.
    I need some help on AC parallel circuits. Bit I didn't find any video from you.
    Thank and regards Nicholas.

  • @jemir8012
    @jemir8012 2 роки тому

    thanks for this video.

  • @isteascope
    @isteascope 4 роки тому +2

    Hi Joe. Thanks for your training videos, they are helping me to pass my exams. No, I found this problem, How can I proceed? Let me now any clue... Problem: "A 120 V circuit contain a fluorescent fixture with the two 80 watts lamp, an ampere-metter is connected and indicate a 1.6 amps load. What is the power factor of this circuit ?"
    Thanks in advance for your help.

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому

      Hi Luis, great question, I'll shoot a video, pop it on my channel and give you a shout out if that's OK?

    • @isteascope
      @isteascope 4 роки тому

      @@JoeRobinsonTraining Thanks Joe. That will help me a lot.

  • @CommonInvesting
    @CommonInvesting 2 роки тому

    brilliant video, im prepping for my level 3 8202 theory now. what if to find out Tp etc, but your only given the angle? how would this work, thanks

  • @medo2000200561
    @medo2000200561 4 роки тому +1

    Why overcompensation causes over voltage at the load terminals. I searched for the reason but I did not find the equations that supports this phenomenon. If u can help me please

  • @verminer7
    @verminer7 2 роки тому

    Can i calculate PF of induction motor?

  • @Shadow_Hawk_Streaming
    @Shadow_Hawk_Streaming 2 роки тому

    my lecturer sent me here after it became apparent our lecturers last year didn't particularly cover.....well, most of the theory tbh, hopefully I'll make head or tail of it eventually.

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  2 роки тому +1

      Check out my playlists to get the info in the correct order Antony, hope it helps! 😊

  • @mirwais16
    @mirwais16 Рік тому

    WWhat system voltage do you use?

  • @coatechnics2676
    @coatechnics2676 3 роки тому

    In what situation do we say the circuit has a poor power doctor ?, is it when electrical bill is to high?

  • @faesil2000
    @faesil2000 Рік тому

    AMAZING VEDIO

  • @azizbiabani6787
    @azizbiabani6787 3 роки тому

    Sir coupling capacitance?

  • @jonny__b
    @jonny__b 3 роки тому

    Great explanation! However I feel like saying "power factor is a bad thing" is slightly misleading in the sense that a higher power factor is actually better than a lower power factor.

  • @tammmacdonald7723
    @tammmacdonald7723 4 роки тому +1

    When did the phase angle become referenced as Theta? It was classically identified as Phi.

  • @akau7591
    @akau7591 4 роки тому

    Wow. love this video

  • @sadiarehman9175
    @sadiarehman9175 4 роки тому +1

    Your videos are very informative . But if there is some way you number the Videos from 1, 2, 3, 4 and so on ; it will help a lot to focus in a proper manner .

    • @JoeRobinsonTraining
      @JoeRobinsonTraining  4 роки тому

      If you look at my playlist called "AC Theory" they're in order on there.

  •  Рік тому

    How does the power supply company know what your power factor is to fine you given that they don't, in general, know what equipment you have and how it is used?

  • @Daz_sz
    @Daz_sz 2 роки тому

    Leeegend Thank you

  • @lughtuathade1721
    @lughtuathade1721 3 місяці тому

    I still didn't get how did he get that 125V? Can someone enlighten me pls

  • @suhailawm
    @suhailawm 4 роки тому +1

    Tnx alot sir.

  • @kitemanaoru7896
    @kitemanaoru7896 Рік тому

    I love it

  • @azizahmedmuhammad4124
    @azizahmedmuhammad4124 3 роки тому

    Amazing....

  • @shokrollahgholizadehmojaveriam

    Great

  • @wallbouncer9655
    @wallbouncer9655 4 роки тому +2

    👍🕺