Three Phase Electricity Basics and Calculations electrical engineering
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- Опубликовано: 27 янв 2019
- In this video we learn how three phase electricity works from the basics. We explain how three phase electricity is generated, how the voltages vary, how to calculate the voltages and vrms, what frequency, hertz and cycle mean and how we get two different voltages from a three phase supply. We look at wye and delta, transformers and generators. We start with a simple single phase AC generator and then add in a second and third phase to under stand its working principle.
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For RMS you could simply multiply the peak voltage by 0.707. (area under a sine curve)
......
Interesting(?) Fact.
That is also the ratio between the sides of any standard sheet of metric paper.
Example,
A5: 150x210mm
A4: 210x297
A3: 297x420
etc.
Half the size of paper, gives 71% of the length
Those in Europe/ UK, look at a photocopier.
Standard enlargement/reduction
35%
50%
71%
1:1
141%
200%
How can two phase electricity work with only single neutral wire?
Awesome video
@@RaviSingh-fv4sh ruclips.net/video/fJeRabV5hNU/видео.html
You do realize that the cogs on the logo would jam right?
Dude the kids/teens growing up and going to high school and college have no idea how fortunate they are that people like you are putting these type of educational videos on various subjects. It makes it much easier to understand rather than just hearing from your teacher or reading a book (which even I never understood right away) since I am a visual learner. I wish I had these type of videos for reference when I was in high school/college.
free education right here
it's like they want somebody to learn it 🤷🏼♂️😝🤪
Actually todays generation will not realize how lucky they are. Accept for some smart kids.
yes, but they are not here, they are getting their brains fried by tiktok
I appreciate it alot, i am currently studying for my bachelors exam and this guy saves my ass hahah
Oh yeah. The way they have modern school set up is ridiculous on so many levels.
I'm speechless. I've been watching this series for hours. I am a high voltage electrician apprentice. Generation, transmission and distribution substations...
This video series on electrical theory, single and 3 phase power is simply perfect.
Information taught this well is literally priceless and it's free to all. As it should be. However. Your effort in production and your ability to convey concepts is unmatched.
I can't thank you enough, not just for myself but for anyone watching this and learning from it.
What a gift.
I watch many videos teaching this subject and this channel is by far is the best. Don't waste your time watching others.
agree
came here only to say this exact line, im learning more than i learned in my 4 years of tech uni
I received my bachelor’s of electrical engineering in 2001 and wish this video was available (it is much better than many of my professors in able to explain it from a pragmatic view). It helps me reinforce and gives me tips how to better explain power. Many thanks.
This channels teaches you things within few minutes ...whereas in colleges or educational institutes it take almost 3 to 4 years to get concept clear ..Great channel .
If someone doesn't understand stuff,you refer to the internet. It's written in every religious book. I struggled with data structures and algorithms in school so,I referred to RUclips. It wasn't easy at first but I eventually got the hang of it, schools and colleges don't have the liberty of giving special attention to each student.
You missed the point. It isnt that they didnt understand their professors the first time and had to refer to youtube. Its that universities take years to teach stuff that could viably be taught by a youtube video in a few minutes.
You would think that a credetation site which charges such high prices would be more efficient at educating their customers, if the information is already freely available on the internet.
There are people here saying that their universities never even taught this stuff at all, which, before you say is them not paying attention, well, they wouldnt have passed and recieved their major then, but they did.
You would think that if you have to pay such a premium to recieve an education at a university, you'd learn enough to not have to leave comments like the original one posted here. The point is that we're really only going to a university for creditation and to network, because the good education seems to be happening on the internet
@@samo6401 who do you think is better off, someone who watched a 5 minute video, or someone who spent 4 years thinking about their subject. Theres a lot to be said about colleges failing, but its not one giant 4 year multipart youtube video that can be condensed into 5 minutes, when you are in college you are practicing the material, after a 4 minute video on youtube, you arent done knowing everything about something, its not like your education is complete. This is survey, which has its place, but you shouldn't conflate the two things as if they were exchange-able.
@@Triggs-Music thats not what we're talking about here. We dont mean the entire collective knowledge of all of the classes people took in college. We mean one topic, where in college, you need to spend years taking preliminary courses as well as gen eds just to finally get to it at the end, when you couldve understood it with just a 5 minute video, and you need to pay for all of that. You didnt need all of the college experience, you may have not needed the preliminary courses, you didnt need the gen eds, and as much as I agree with you that education isnt complete without practice, if there are college grads here saying that this was never taught in their coursework, do you think they practiced? No.
Thank god for the internet. Information like this used to be hidden behind a massive paywall.
@@samo6401 how is what I said or the other guy green goblin for that matter not what we are talking about. If I’m adding to the point that’s not me changing the subject, if I reject your point with a new point then it’s part of the said conversation. If it weren’t then no one could ever argue and every idea or thought would Have to be accepted as true.. with that, I agree with you that colleges are failing and the quality of education is absolutely terrible, that god there is indeed an alternative. But what you are understanding in 5 minutes here is not all there is to the subject. There is a point to being around people who know the subject. The role of teacher is not just learning but also help knowing where to look next. If you are forever doing this on your own, you’ll get stuck eventually in basics videos. I have to say but I’ll stop here for now
There is nothing else like this channel. The dedication with which these videos are made is commendable. The animations. The narration. The concepts. The excel sheet!
That last 2 minutes my mind just went from off the charts to wow it all makes sense now and always wondered where the 208v came from. Thank you for you're knowledge and dedication to teaching along and make it so easier to understand
For anyone curious as to why Vmax is exactly sqrt(2) x Vrms, here's basically why
What having equal heating power means is basically that the integral of the AC wave's power is equal to that of the DC current, and over a fixed time, they'll transfer the same amount of thermal energy to the block.
Using basic formulas, we can see that P = VI and V = IR. These can be merged to solve for power, as being P = V^2/R. Letting R be the same between both scenarios which is required, we get P proportional to V^2
The energy of one AC waveform with voltage Vac*sin(t) (no frequency or phase offset since we are just looking at a single waveform) should equal a DC source with voltage Vdc, and since energy is the integral of power with respect to time, we can show that;
∫(Vac(sin(t))^2 dt = ∫Vdc^2 dt
for the range between 0 and 2pi (one waveform)
Solving these integrals gives pi*Vac^2 = 2pi*Vdc^2
Re-arranging gives us Vac = sqrt(2*Vdc^2). If we were to sub in an RMS/Vdc of 120v, we get Vac = sqrt(2*120^2) = 169.71 ~= 170V
This is where that sqrt(2) conversion factor comes from.
Good point well made.
your videos are way underrated and the views do not reflect the content super helpful
love this guy who explains better than my teacher.
Your video's are the best I've ever seen. I know everything you discussed but if I were a new student I would have learned more in 15 minutes than reading my text books for hours at a time. I wish these were around when I was a kid, just so much easier visually seeing how something works that trying to decipher it from written text.
I don't know man,how your videos manage to taught me all necessary knowledge,which I supposed to get in my university.I didn't understand it on my native language, However, you nailed it in few minutes in English,just bloody miracle of your teacher's talent,hats off to you,Paul,and sincere gratitude
Cannot believe how much I love this channel. Fantastic job at explaining everything so that we can pick up quickly.
Great vid mann!!! Thanks for all the formulas!! Well explained!!!
Here in Africa, your videos have exposed in depth as well as clarifying science and engineering concept down to basis. I have learned tremendously from the tons of videos you made. Thumbs up.
Best explanation ever. Sine wave, 1 phase, 3 phase, V RMS, V Max. I'm just a country man and just start learning basic electronic and DIY stuff in my old age. I only understood after watching this video. Thank a lot
You just taught me more with 2 videos than my entire High School on this topic.
Sub/Notif.
lol
Thank you 🙏 to The Engineering Mindset and all crewmen and people that makes this possible, for all the information you give us.. many, many thanks 🙏 your channel is amazingly al’some, you teach us things that it will take 2-4 years for college to teach us... thanks once again..
This is a great video. 208 3 Phase is however regionally specific in the US, and 480v 3 phase is much more common in some areas, especially concerning HVAC and some generators. I work at a commercial property that's about 30 years old in which one property tenant has 3 phase 208 and their neighbor 40 feet away has 3 phase 480v. it would be great to include this in future videos or update. All in all though I love The Engineering Mindset videos!
Wow, i couldn't get a better explanation than this. Thanks a lot
THANK YOU SO MUCH .. AFTER 35 YEARS NOW UNDERSTOOD THE STUFF BETTER . IT WAS DIFFICULT IMAGINING , WHAT EVER WAS TAUGHT IN THEORY , SO WE HAD TO MUG UP FOR EXAMS THOSE DAYS .
THANKS TO YOUR WILLINGNESS AND RESEARCH TO FIND BETTER WAYS TO TEACH SO THAT CONCEPTS ARE CLEAR TO OLDER GENERATIONS LIKE ME . EXCELLENT KNOWLEDGE AND TEACHING SKILL .
You've just managed to teach me in under 8mins something I've failed to understand for nearly 40yrs 🎉 cheers mate
went to NJIT back in 09-13' and no one ever explained this as clearly. great for upcoming engineers!
When I went to engineering college, they introduced all of this. When I couldn't grasp it, I asked them to go over it again. They said "don't worry about it, it will all makes sense as we go along". Well, it didn't. I was the stupidest kid in the class and after a couple of semesters of struggles I quit. Now, I watch a couple of video's that are well presented and I can scroll back and the dumb shit left and a smart guy entered the room. I cannot believe what the computer and intelligent teaching is doing for me. Funny thing is that I look at the graph showing the places where people scroll back and repeat? Turns out there must have been a huge percentage of people just like me that didn't get it on the first pass. These videos are un-fucking=believeable. Thank you to The Engineering Mindset. I hope they keep making or improving the material at those scrolled over parts!!!
Love your videos. You explain things well! I think you should have kept all the calculations for a different video though. It didn't mix well with the explanation of what 3 phase actually is.
You make it so easy to digest rather complicated material for most. Such a short amount of time too👍🏼💯
Love the video, just wanna add that most of the EU runs on 230/400V and 50Hz instead of the 220/380V you mentioned
yup
Yes, the entire EU has standardized it grid on 230V since 2009. Including the UK. This video uses the pre-2009 voltages. Though the concepts are the same and the video is still as useful!
Great stuff. Takes me back to 1970s when I taught electricity and electronics in the Air Force.
I enjoyed the ac power generation part. Very intuitive, thanks for sharing.
The information is so intuitively explained. It almost feels like sorcery!
Wow!! Super Clare for me sir. You are the best of the best.
Purchased the spreadsheet. Epic job mate!
My dear old Pop was an Electrical Engineer who began his career as a jointer working on mains electricity installation vis underground high voltage cabling in London. As a kid he tried ceaseless to explain to me how it all worked and I just never got it, now in my 70s it’s still a mystery but thanks to these videos I now get it.
Thanks for that and to those thumbs downers, go and get a life!
So my teacher said “I’m going to show you guys a video today” and sure enough it was this channel. Love these videos, good job.
These videos are fantastic - easy to follow and intelligently presented.
You are an EXCELLENT teacher, dude.
Wow, this is educational and rather simpleminded to give me a general understanding of what’s Goog on with the electrical in the house! Great!
Well explained and easy to understand. Thanks :)
Really appreciate your videos. I use them a lot, many thanks
Knowledge being taught must be as in this active and readable way , not just those fixed graph and vague words !
Anyway , thanks for your brief but elaborate teaching !
Chuck from Taiwan
RMS Voltage is the Voltage, where the area between the graph and 0 line of the voltage is the same size for either AC or DC. That is a mathematical function and results in a factor of root 2 ~1.41 between the voltages
It's very easy to understand through your videos. Thank you so much.
Very informative and simply explained about the details. Thank you
Straight to the point. Great Vids. Subbed.
I jusy subscribed this channel after watching and learning in way like my elder brother teaches. Thanks brother. May Allah bless your more and more knowledge which never ends. 4m Pakistan.
I hope you tube pays you well for your efforts producing these video
RUclips keep around 40% of all our ad revenue, but I do make some money still. Nothing compared to these kids uploading videos of themselves playing Xbox games though.
These are brilliant. Many thanks.
i just leveled up my electrical knowledge by 10V now. Thanks!!
right?
Thank you so much; I had trouble understanding the concept of electricity in physics. However, after watching these videos, everything is clear to me. I am glad that I came across this series.
What an awesome channel - many thanks for posting!
These channel is the best for an engineer to understand so faster things what he needs for technical domain
This is absolutely incredible thanks. University only taught me the functions and calculations but gave me no deeper understanding.
it did teach me
i have found that it really does depend which uni you went to
very good explenation right here, thank you for you knowledge and good animations.
Love this guy..😍
Oh my good God.I just came across this video,made physics in radiology so easy for me.. I'm impressed, thank you very much.
Great informational video. Had to refresh on how 3 phase works.
Thanks for the spreadsheet!
Huge Help to Electrical students in these animations its Easy to Engage thru Theories applied.
THANK YOU VERY MUCH.KEEP GOING FORWARD
Thx for the awesome explanations in this video and for reminding the basic of 3 phase current :-). By the way for me as german it's very interesting getting more familiar with US electric and I must say it's very different to german electrical power and installation - great channel
Wow - I get it. That was made it simple to understand - thanks.
Man, you are so good with explaining. Unbelievable.
Just sent you a tenner for watching 4 or 5 of your videos, keep up the good work, try to get these into schools, such an easy way to learn the basics and advanced stuff and an easy way for most people to get their head round it. cheers
Thank you for your support, Phillip.
dude thanks a ton for explaining with such details!!
Thanks for this elaborations, they are second to none!
Where 1line is 34.6A and end to end is 20A, how many amps is the motor?
What a great video but unfortunately, I can’t view it until the end for some reason. Can’t wait to see more about three phase in the other video you referred to.
Would love a video explaining how it shorts out.. like, the fact the neutral is connected to the star point isn’t the same as a L-N short, and how phases don’t short out when connected together.. could be obvious but think these videos explain basically everything there is to know, extremely well
this is just too good of a video. very informational
Amazing video as always ! Love this channel
Thanks for your comment :D
Thanks for your comment :D
You are so good! Helped me a lot!
Excellent. Useful information.
These videos Super helpful ... Thanks A lot
Marvelous video across youtube and sheer evidence of incredible enginerring teaching of this century
Best explanation ever !! 👌
Thanks a ton! The BEST.
Thankyou so much.
It's very very helpfull.
I have been waiting for your next video
Very informative. It helped in understanding the fundamentals.
Thank you so much for excellent explanation . I highly appreciate your explanation .
Fantastic Video as always, thanks!
Just have to say the standard in the UK is now 230V at LV or 216V-254V as regulations allow for +10%/-6% from 230V, so 240V is still acceptable and confuses some people.
Source: Work for Electricity Board
I almost put a section about this and the EU voltage tolerance changes but in the end settled on covering the basics with a single value.
The Engineering Mindset I agree with you for mentioning single value of 1ph and 3ph voltage to avoid any confusion of the listeners.However, a general statement can be given stating that there is upto +/- 19 tolerance that various country to country per local electrical authorities.
Yes, and also in all EU countries 230V is standard voltage for at least 15 years now.
@@EngineeringMindset Interesting videos. UK & Europe were harmonised about 1992. I was working in T&M calibration/service centre and we had to amend hundreds/thousands of Metrology Support Packages when calibrating/testing/certifying each item of DVM, multimeter, PAT tester etc. as the test points/results would be across the expected range of supply voltage. Effectively both sides converged on nominal voltage of 230V, Europe was 220V plus tolerance and UK 240V minus tolerance. ISTR approx 7% of UK mains supply came undersea from generation in France etc. and was a practical driver to harmonise.
Check our new Multimeter tutorial out ➡️ ruclips.net/video/4lAyzRxsbDc/видео.html
I think i can literally throw my textbook later.Great video,thanks.
I certainly appreciate your videos and have generated a question. If a 3-phase motor’s ground cable is connected to a neutral block, would this have any affect the motor’s operation?
It is really interesting to see how other countries handle the electrical installation / infrastructure! But the most countries in Europe (for example Germany) also use 230 / 400 Volt 😃
Poland use 230V also England use 230V
@@PrzemekSzmigielski In Italy 230/400V too
Netherlands 230V
These are very useful. Many thanks.
Awesome video!
Thanks Paul! Excellent.
Earned another subscriber, good information man.
This is very helpful. Thank you very much.
This is what I needed...
I really hate that I am watching this on a Sunday night, but I am very glad that I finally have a basic understanding of how 3-phase works
Wish all the best of luck for you
Ver useful information
Superb Video . The best ever to understand the phase
Correction, the voltage used throughout Europe (including the UK) has been harmonised since January 2003 at a nominal 230v.
So UK 240V and EU 220V is false.
4:40-6:33 Two corrections:
* The waveforms are not correct. From Faraday's law, we know the induced EMF in the coils due to the rotating magnetic field, is proportional to the _rate of change_ of the magnetic flux through the coils, not proportional to the flux itself. So at time 4:59, when the magnetic field is maximum as stated in the video, the induced EMF is actually zero (not maximum as the video says) because the rate of change of the flux is zero at that instant. At time 5:09, when the magnetic field is zero as stated in the video, the induced EMF is actually maximum (not zero as the video shows) because the rate of change of the flux is maximum at that instant.
* An AC voltmeter reads the RMS value of voltage, not the instantaneous value as the animation show.
Watching all your videos, valuable than Netflix or Amazon...Keep posting
I would have smashed school with resources like this as a kid. Thank you!
Two thumbs up!! thank you!
Passed my electrical class exam but never understood the concept so I couldn't wire a hell. Thanks to you.
Great job sir, keep it up.
Thank you Paul :)