Three Phase Electricity Basics and Calculations electrical engineering

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.

Sign up for our FREE engineers newsletter for updates, competitions, news and offers

⚡🛠️ TOOLS YOU NEED 🛠️⚡
**************************************

MY FAVOURITE GEAR

📊 Excel Sheet - 3 Phase Basic Calculations 🤓
*******************************

👋 SOCIALISE WITH US 👋
*******************************

🙌 SUPPORT US 🙌
*******************************
⚠️ *Found this video super useful?* Buy Paul a coffee to say thanks: ☕

👀 Links - MUST WATCH!! 👀
*******************************
⚡ELECTRICAL ENGINEERING⚡

❄️ CHILLER ENGINEERING ❄️

🌡️ HVAC ENGINEERING 🌡️

⚗️ REFRIGERATION SYSTEMS 🌡️

⚗️ REFRIGERANTS ⚗️

🌊 HYDRONICS 🌊

🔥➡️❄️ HEAT EXCHANGERS 🔥➡️❄️
current electricity ohm's law conduction
#electricity #electrical #engineering

[babajungLA]

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.

[NWJF]

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.

[casanova]

I watch many videos teaching this subject and this channel is by far is the best. Don't waste your time watching others.

[traveldiaries]

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 .

[mlancepittman]

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.

[Jatinjangid]

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!

[Byefriendo]

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.

[BowensBlvd]

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

[haiqichen]

love this guy who explains better than my teacher.

[AugustineAriola]

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.

[Glotzekatze]

Love the video, just wanna add that most of the EU runs on 230/400V and 50Hz instead of the 220/380V you mentioned

[twle]

You just taught me more with 2 videos than my entire High School on this topic.


Sub/Notif.

[akramal-khazzar]

your videos are way underrated and the views do not reflect the content super helpful

[richmac]

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.

[vadim]

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

[jarednielsen]

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!

[tufimckane]

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

[jkj]

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 .

[vheisshu]

i just leveled up my electrical knowledge by 10V now. Thanks!!

[jaydoshi]

went to NJIT back in 09-13' and no one ever explained this as clearly. great for upcoming engineers!