Thanks Joe. 3 phase has always mystified me but with your videos I'm getting nearer understanding it all.

@JoeRobinsonTraining

4 жыл бұрын

Glad they're helping. As always if you have any questions or suggestions for future videos let me know!

OMG.Just found your channel and can't fully describe how easier its for me to understand stuff that I've been taught with City and Guilds. Absolutely brilliant ,thank you!

@JoeRobinsonTraining

4 жыл бұрын

Glad it's helpful, stay tuned for more!

Amazing how simple you made that to understand. So cool to understand this now!

Thank you so much for this amazing and direct video. Definitely looking forward to more videos from you

I've always wondered about this and you answered beautifully.

This is the easiest explanation that I came across so far. Thank you very much. Superb!

This is a great explanation. I appreciate the fact that your explanation uses the actual goings on in the circuit. This really helps me understand - as opposed to just believing - how the circuits operate. Thank you! You just gained a subscriber.

@JoeRobinsonTraining

3 жыл бұрын

Good to hear. I'm really glad the video helps. 😊

Fantastic video joe thanks

@JoeRobinsonTraining

4 жыл бұрын

Thanks very much, stay tuned for more!

Brilliant explanation. Something I've been looking for in a long time.

Joe, thanks for answering my curiosity! Great video and explanation

Hello Joe, Outstanding Video. Very informative and a great training tool.

@JoeRobinsonTraining

4 жыл бұрын

Thank you kindly, there's more to come so stay tuned!

Excellent video Joe. Very clear and concise explanation. No wonder I Subscribed!!

@JoeRobinsonTraining

4 жыл бұрын

Glad it came across that way. Plenty more on the way so stay tuned!

Awesome explanation. Thanks a lot for sharing such a valuable and highly practical content.

This is brilliant stuff. Thank you! I wish Joe Robinson and KZread were around back when I was in Uni!

@JoeRobinsonTraining

3 жыл бұрын

Thanks for the kind comment. 😊

Hi Joe. We have a motor that was recently rewound, full service done to it. But when we installed it is pulling high amps in two phases only. supply voltage = 460 motor amp rating = 283 voltage phase to ground phase A =279 phase B = 280 phase C = 282 amps per phase phase A= 277.0 amps phase B = 296.0 amps phase C = 286.0 amps we are using a soft starter to get the motor up to speed , once the motor is at full speed a bypass contactor is energized and from that moment On the soft starter is only waiting for the stop command we are going across the line with the contactor. We suspected the bypass contactor was faulty and causing the high amps , but when we inspected the contactor it was in good condition , it worked properly. We checked for loose connections and found none . motor and cables Megged good. There is not enough imbalance to cause the problem. Any idea what could be causing this problem ???.

Great vid, like all your other vids are, your ability to convey your knowledge in a simple easy to understand way is exceptional.

@JoeRobinsonTraining

4 жыл бұрын

Aw, thanks for the kind comment 😊 just hoping the videos help people out. Stay tuned for more!

Really valuable due to the work I’m currently doing, thankyou👍🏾

@JoeRobinsonTraining

4 жыл бұрын

My absolute pleasure Leo, stay tuned to get ahead for next week!

Informative series of videos. It is great to see how you build up the concepts one after the other.

@JoeRobinsonTraining

3 жыл бұрын

Thanks very much, you can understand anything if you take the right steps. 👍

Great Explanation, simplified to the maximum and easy to understand.

Excellent video again joe. I watched the first one a while ago, could you not leave it so long for the next instalment!! The suspense is killing me😄👍

@JoeRobinsonTraining

4 жыл бұрын

😂 Sorry Gareth, it was an absolute monster of an edit. Next three phase video should drop next Wednesday. Thanks for the support! 👍

excellent video. clear and precise. straightforward and easy to understand.

Omg this video is absolutely amazing, Helped me soo much in my AC principles class.

@JoeRobinsonTraining

3 жыл бұрын

Great to know. Make sure you check out my other videos. 👍

Awesome tutorial. Many thanks Joe

wow, that's crazy stuff. I must be on my 3OTH video. great information and very well explained. thanks a million

Nicely done!

Thank you for your explanations...

Excellent presenter and teacher - Thank you Joe 👍

@JoeRobinsonTraining

3 жыл бұрын

Ah thanks. That's really kind of you to say. 😊

Fantastic example thank you

Really great, I finally understand why.

Excellent Way of presentation.....Three Phase Concepts made explicitly simple....Appreciated..

@JoeRobinsonTraining

3 жыл бұрын

My pleasure, thanks for commenting. 😊

your practical explanation way more specific than any others I need a practical explanation about Filter from you. Like you so much❤❤❤❤

Very understandable video about three phase thanks Joe

Brilliantly put cheers buddy 😁👊👍

@JoeRobinsonTraining

4 жыл бұрын

You're welcome Ant, thanks for the message, stay tuned for more!

Thank you Sir for this amazing video. I am a junior biomedical engineer working on Xray machines. I have noticed that we are not connecting the neutral line in the generator and i was wondering why. Just watched this video and you explained it! Appreciate it.

@JoeRobinsonTraining

3 жыл бұрын

You are welcome! 👍

Time to learn with Joe 📚

But we did need the neutral with two phase of usage, as well as single phase. Very well presented video. Thank you.

@JoeRobinsonTraining

4 жыл бұрын

Spot on Ted, you may remember from the previous video though that when we removed the neutral connection for two lamps they dimmed, I'll explain this in a future video!

@xerxes456

4 жыл бұрын

@@JoeRobinsonTraining could you use square root of 2 that give you lower voltage?

@tedlahm5740

Жыл бұрын

@@JoeRobinsonTraining Joe: revisiting this subject 3 years latter. Still a Learner. Does the VOLTAGE jump up on 3 phase open neutral on the individual legs with ONE LEG no longer has no load? P.S. You do not look a day older.

This video has answered so many of my questions

Beautifully explained ....Thanks

@JoeRobinsonTraining

7 ай бұрын

Thanks for all the comments! 😃

Great video as always Joe, it's really helping my understanding of 3-phase supplies. I've always found 3-phase a fascinating subject, these videos are perfect for anyone trying to understand the underlying principles behind it.

@JoeRobinsonTraining

4 жыл бұрын

Thanks for the nice comment, I'm glad they're helpful. The edit on this one was a nightmare so glad it wasn't in vain! Stay tuned for more...

Thanks a lot for very good explanation

Did wonder about this yesterday, I'm not an electrician but wondered how a 3 phase SWA cable could get away with a neutral that wasn't 3 times the size of the lives. Read some text that explained it but no where near as well as your video. Brilliant.Thanks

just found your channel and as i just started my apprenticeship in germany this is really helping filling in the gaps of the language barrier. so far one of the best explanations ive found and easily put across so thank you dude

@JoeRobinsonTraining

3 жыл бұрын

Ah great to know, glad the content is helping and thanks for commenting. 👍

@PunmasterSTP

2 жыл бұрын

How has your apprenticeship been going?

Great video, keep the three phase one's come.

@JoeRobinsonTraining

4 жыл бұрын

Thanks Simon, next week's video is a three phase one as well. 👍

Many many thanks sir... I was trying to understand about three phase. Finally, I got it..

@JoeRobinsonTraining

2 жыл бұрын

Ah brilliant, love hearing this. 😊

No neutral required? More like "The amount of knowledge conveyed in these videos is wild!" Thanks for making and sharing them.

This video was perfectly explained thank you sir

Great explanation. I wish i had a teacher like you....

@JoeRobinsonTraining

3 жыл бұрын

Ah, but you do, right here on KZread!

very good,theoretical and practical

Another great video 👍🏻👍🏻👍🏻

@JoeRobinsonTraining

4 жыл бұрын

Thanks very much for commenting, stay tuned for more!

Actually one of the best explanations, but with a greater explanation always comes more questions, you said that the current at the neutral point will be always zero, and you thankfully proved it by experiment, so there is the question "how could we get 8.4 amps in the lines before the heater while at the other end (the neutral point) has zero amps ?", it doesn't make sense to me as it means there is no charge carriers moving at all, they stop each other

@dimitrisblane6368

3 ай бұрын

They don't stop each other. They sort of "push/pull" each other at the other side of the load so it's always zero. As the 3-phase graph describes. You could think of it with the water example. At one point in time motor 1 might be pushing 5 litres of water, while motor 2 is sucking 3 litres and motor 3 is sucking 2 litres. The current from one phase will go through the load and then balance out with whatever the currents on the other 2 phases are doing cause they are in perfect balance.

Great explanation! Thanks!

@JoeRobinsonTraining

4 жыл бұрын

You're welcome, please check out my other videos!

Hi Joe your explanations are super clear ,can you do a video on a single phase max demand calculation of a building and a three phase max demand of a factory.

Great video Joe 👍 Prime mover comes to mind...

@JoeRobinsonTraining

4 жыл бұрын

Thanks very much Alan!

5:20 This part is a bit misleading. We don’t need the neutral wire to complete the circuit in a three-phase circuit even when we have unbalanced conditions. This is because the phase wires act as return wires in different intervals of time.

Great video joe

@JoeRobinsonTraining

4 жыл бұрын

Thanks very much!

Knocking it out the park Joe!

@JoeRobinsonTraining

4 жыл бұрын

Thanks Will, nice to know they're helping!

Brilliant video .Please do more

Excellent video, very informative for me, a non spark mech engineer who has to play with electricomagical angry pixies from time to time!

Brilliant! 👍

Just came across your channel & found this video super clear & extremely helpful (my apprenticeship, in the UK, finished over 30 years ago & since then I have had no exposure to 3-phase systems). Now in Gemany I have a 3kw immersion heater element, of the 400v 3-phase variety, to install at home. No info came with it & I can find nothing online (happy days!). From a visual inspection of its internal connections it is STAR configured, with 3 individual heating elements - one per phase. I have measured the resistance of each individual heating element/phase (i.e. to the neutral point) & they are all the same. I understand that this then represents a 'balanced load' scenario, and thus does not need the Neutral line to be connected. My question is, is there any disadvantage of connecting the Neural line if it is already there/available to do so? I don't beleive that there is but... Thanks ever so in advance for clarifying this.

Excellent explanation.

@JoeRobinsonTraining

2 жыл бұрын

Thank you!

Fantastic.

Very nice presentation...

Another great video! This guy kicks ass!

Well explained

Fantastic as always Sir 👍

Thank you.

nice teaching I learned musch more

Nice one...keep going

Marvelous teaching, my local lecturer only did throwing equations and electrical diagrams at my face...

@JoeRobinsonTraining

3 жыл бұрын

Thanks, tell your classmates! 👍

Really rally good explanation

@JoeRobinsonTraining

3 жыл бұрын

Thank you. 👍

thanks joe

Great video, Joe. Mystery solved although it seems too simple! I guess the way to look at it is that any wave form above the axis line is a positive figure and any value below the wave form is a negative figure; add these three up and you have the value of zero?

@JoeRobinsonTraining

4 жыл бұрын

It pretty much is that simple and you've totally got the point of the positive and negative values. It gets a little trickier when we start looking at imbalanced three phase loads. Stay tuned for next week's video!

@LSF315

4 жыл бұрын

Joe Robinson Training brilliant; can’t wait.

Vary useful information ❤️❤️

Hello I like your videos. You put them across so that most people can understand. There is a circuit that I would like you to do for a group of us. We would like you to show us a lift station with a high float and a low float switch. How I want it to operate is, when the water, sewage or any liquid rises it turn on the low float but the motor does not start until the water or sewage reaches the high float. When the water is pumped out the motor does not stopped until the water is down to the lower float. Thanks in advance.

@JoeRobinsonTraining

2 жыл бұрын

Sounds intriguing, il add it to my to do list. 👍

You cleared my long time doubt so quick... @ motor winding... Y they are connected together

@JoeRobinsonTraining

4 жыл бұрын

Glad the video helped! Stay tuned for more!

Very helpful video❤️🔥

well done

GREAT VIDEO!!!!!!!

Finally a video that made things more clear. 10:28 literally made say, "ooooooooooh. now I get it."

great video bud 😊

@JoeRobinsonTraining

4 жыл бұрын

Cheers matey!

thank youu!!

Excellent

@JoeRobinsonTraining

3 жыл бұрын

Thanks very much!

Nice teaching methodology

@JoeRobinsonTraining

4 жыл бұрын

Thanks very much!

I have seen 1000 video.But your videos are my life.

@JoeRobinsonTraining

4 жыл бұрын

Thanks very much, that's really kind.

Awesome video!111

Thanks very much. Check with you, does RCB without neutral.

thx man / helped a lot

@JoeRobinsonTraining

3 жыл бұрын

My absolute pleasure! Make sure to check out my other videos on the subject.

this content is awesome! The heaters will also be depicted as the KCL or Kirchoff Current Law.

@deang5622

Жыл бұрын

No, you don't depict things as Kirchoff's Law. Kirchoff's Current Law is simply an analysis technique to enable you to evaluate the currents in the cables All it says is the sum of the currents entering a node is zero. So you ascribe direction to the current, and that is indicated in diagrams using an arrow, which sadly most electricians don't seem able to do, for some bizarre reason. And you also ascribe a positive or negative value to the magnitude of the current to indicate direction it is flowing in. Currents flowing in a positive, currents flowing out are negative. You can even do it the other way around. It doesn't matter as long as you are consistent.

Great video and makes sense when you have 3 balanced loads, but (unless I'm missing it) there isn't an explanation as to why when loads are only on L1 and L2 that the current in the neutral is the same as the individual loads? Sorry, new to this so might be a dumb question?

This had me baffled for years, all it takes is the right teacher.

Hi Joe. Excellent! Can you do a video on bonded or floating neutrals on generators & if Earth rods are required?(TNCS) Regards mg.

Thanks a lot for the efforts taken to produce this very valuable content! I have two questions and hope you can clarify. 1. Even though loads are balanced, the current must flow through closed path and hence at any moment, current from one phase gets split and flows through other two phases. Is this correct? 2. In typical medium voltage distribution system, there is never a neutral, and the loads connected could be far from balanced. How does the net current (vector sum of all three phase currents) flow in this case? Does it flow through other phases as in case of balanced loads? If yes, then how get current in neutral in this video? Thanks a lot again for your time!

Really nice n simple. Plz ur support for my question which is, If it says 3ph generator has 120amps capacity, does it mean that each phase will provide 120amps or each phase will provide 40amps?

Joes are awesome :)

That 3 phase current cancelling example finally cleared the air for me after all these years on no need for neutral on balanced load, thanks! Got a question though- the electrons still need to return to their source, so at any given degree of rotation is the electrons flowing down the respective phases in the opposing directions back to the source?

@serpaolo7413

2 жыл бұрын

I have the same question? Any answer?

ty for that clarity. The only thing I don't see is at the 10:35 mark the total is a clear as day. 8-4-4=0. When you had 2 legs on it was 8 on the neutral. However when you pick any point on that waveform and try to match A + B they don't add up to 8 all the time. say for instance at the line you inserted. The red phase is 8 but either of the other 2 are -4. 8-4=4

@JoeRobinsonTraining

2 жыл бұрын

It's the same principle as a single phase sine wave, it will have a different value at different points. What you're looking for is the rms value of the wave form. 👍

@brentkelly5445

2 жыл бұрын

@@JoeRobinsonTraining ty . one more question if you have the time. It would be almost impossible ,yes?, to have a panel balanced at any one moment. Thus there is always an amount of unbalanced current running back to the panel neutral, and from there to??? back through the service? Also in your example here if you touch the neutral in the balanced state you are fine. if you touch in when one heater is on .... you are toast?

@JoeRobinsonTraining

2 жыл бұрын

@@brentkelly5445 it depends on the type of loads connected to the panel really. If you've got three phase motors it should be almost perfectly balanced, many three phase motors have no neutral for this reason. If you've got lots of different single phase loads, lighting, sockets etc., it's almost impossible to get it balanced. Touching the neutral is different as it's the voltage between neutral and earth that causes a shock, in theory you shouldn't get a shock from either a balanced or an unbalanced neutral, but as it's classed as a live conductor you'd NEVER want to touch it as things do go wrong and you could get a shock. Hope that helps. 😊

@brentkelly5445

2 жыл бұрын

@@JoeRobinsonTraining ah yes ty. because the neutral to ground is less resistance than me.

Brilliant

Thanks ❤ from India 🇮🇳

Great Video! Can you explain how if you remove the neutral reference in this balanced load you still have coil to ground or coil to neutral voltage? In the US we commonly use a 120/208 Y system in commercial buildings. If I lose that reference why are my single phase loads not getting 208? Obviously if you take a voltage reading between any phase to a different phase its 208.