Star Delta Starter Explained - Working Principle
ฝัง
- เผยแพร่เมื่อ 17 พ.ค. 2024
- Star Delta Starters Explained. How do star delta starters work for three phase induction motors and why do we use star delta starters. We cover the basic's of how three phase induction motors work. The basics of each star and delta configuration, a wiring diagram, animations of star delta starters and some simplified worked example calculations.
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Corrections:
6:40 Australian Colours, see correction here: EngMind.info/Star-Delta-Starters.
9:21 "divided by" should be as written, "multiplied by".
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electrician, electrical engineering, star delta starter control circuit, alternating current, current electricity
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please stop adding music, it ruins the video. that damn noise ug, its annoying and distracting. I have no issue listening to music I actually want to hear when I want to hear it. Thi channel isn't "the engineering mindsett and crappy music" . Also coudl you re-upload this video with out the music. I am sure you can easily delete the music with a few clicks.
love ur video...ive got a question, about delta connection. on a terminal BOX u make a delta connection manually in which U1W2, V1U2, AND W1V2. but during automation wiring from delta contactor connection it change the termination. ive got confuse. i dont have any problem on star contactor connetion. thanks..
@@chovsalts606 See the wiring diagrams here EngMind.info/Star-Delta-Starters
@@EngineeringMindset Hi paul, just a mention i notice you didnt include the interlock wiring that enables the star and delta contactors to not run together.
Pls upload a video for a specifications for , star connection can be used upto howmany HP motor and delta connection can be used upto how many hp and star delta fir how many hp motors.
Thanks man, and a million blessings. I have never had anything explained so well I understood something I've been struggling with completely! I work with power systems and dub a lot in electrical systems though I am not an electrician, and I've been struggling with half-baked techs who mess things up a lot. I'm going to use your video lessons for my teams. You are a great teacher, thanks again.
this is the best explanation of star delta configuration on entire youtube
I agree!
This is one of the best videos u can ever watch about motor starters in Y and Delta configuration. I needs more than a 100 stars.
Thanks alot Sir. I really learnt a whole lot more from ur tutorial.
Paul, thank you so much for your time and effort in producing the best and easiest to understand electrical engineering principles on youtube ! Your explanations and knowledge combined with your graphics are so next level - absolutely awesome stuff - Thank you
,
Thank you! Started studying electrical engineering and I’ve always struggled with this for some reason, you simplified it and narrowed it down enough that I got a very good understanding of it!
Excelent video, I am taking a tri-phase eletricity course in college and this is just what i needed! You won a subscriber, pal!
The best explanation I have seen regarding Star Delta and why Star and Delta are used. Clarified some of my misnomas and the explanation helped me make sense and agree with what was being stated. Many discussions and forums I have looked at are under the impression that the motors run slower in star. Speed of a motor is determined by pole pairs and the frequency of the power source and then affected by slip between rotor and stator with flux density being a factor. Flux density is directly proportional to current. With 58% of the current in Star, there would be a reciprocating reduction in flux density. I suppose with lower torque due to lower flux density in the motor, motor slip may be greater and this would then align with comments that the motor runs slower than in Delta. Something I think I would like to test some time. Once again, a brilliant presentation of this subject.
This channel is highly underated channel
Thank you for the great explanation! I have been working maintenance in factories for many years and now finally understand the how and why.
Great video, this give me flashbacks of countless hours wiring up Telemecanique contactors & overloads.. Long live the VFD :)
While it’s a reduced voltage method for starting, you must also remember it’s a reduced torque start also. If the motor can’t reach full speed in star, when it goes to delta, you can still see a huge amp draw spike if the changeover happens below full rpm.
9:21 "divided by" should be, as written, "multiplied by".
Excellent, no-noise presentation, a real pleasure to watch.
I must have missed that electrical lecture 20 years ago. I still think that any mechanical engineer should know this!
very concise and accurate explanation. pretty much what I have learned from second year in the university AC circuits, and maybe a little more. great stuff!
After 20 years in the trade I finally understand visually what is happening. Bless you and all your videos. I always feel full after every video.
This video is gold. This would have saved me from a lot of head scratching and heart burn years ago. Just remember, most older equipment in America is all one color of wire and nothing is ever label. It's always been worked on by 50 people who have no idea what the equipment is suppose to do. This video is awesome!
Agreed. I am currently working at an unnamed university. And nothing is labeled and every wire is the same color.
Thanks for the very well explained star delta connection,configuration and function. Your new subscriber here!
You explained very well. Engineering is our field.. Thanks for sharing
This graphics are amazing for learning. Great job!
With this simplified video you have shredded all my queries.
Thanks for this very help full video.
Request you to please make a detailed video with timer and all contactors for AHU and chillers connection.
Very interesting! I never knew that star-delta (or wye -delta in the USA) was considered reduced voltage starting.One of the only things I knew was you had to have a 6 or 12 wire motor to be able to use this starting method.Your explanation made so much more sense then ever explained to me before and was a lot easier to follow. Thanks for sharing! Scott (USA)
Sir, I am a fan of your channel. Nicely explained. Before this I have watched 🌟-delta from many TH-cam channels but they are useless. Clearly explained. Sir please make video on 🌟-dekta control wiring. I am waiting. Thanks in advance.
one of the best info I have gotten on this subject. well done
Thanks a million for this info.you have explained step by step , you are a great teacher
Thanks a lot... You literally explain things better than boring college lectures... I wanted to understand this so badly. This video was super useful 👌
Most informative and simple video !💙. Thankyou so much .I have an interview today , and this is such a great video to brush up my basics
The best refresher for Star delta start. Thanks for the graphic explanation
Just remember "ABC CAB" and you can work it out every time. Actually in Australia we generally use Red, White and Blue for phase colours with some motor cables used are Brown, Black and Blue.
That a great formula . I just learned it today by my friend who is chargeman .
Thanks for letting them know we use red, white, blue! Couldn’t leave the video until it had been noted
You change my life 😅🙏😅 now i will remember it till i dye.
Thanks you have made my life way easier
Hi
Thank you for that video!!! My lecturer is disabled in explaining things. You really have helped me!
Glad you found it useful
I learned something new today..
Thank you for your hardwork and for the valuable concept..
Absolutely mind blowing... I have been removed all confusion after seeing this Video. Thank you!
now this is enlightenment, pretty much explain everything i want to know, about... thank you sir
thanks for this excellent vid..please make another about generator excitation system🙏
This video is perfect for me to understand the reason and principal. Thank you for providing such a good video
This is one of the best info I have gotten on any subject. Good Job!!!
“Watts up”. Love your work!
Thank you ans God bless you. My third and final year of college in a 10min video.
Which college
Your video was clearer and easy to understand than my lecturer, thanks, this was really useful.
Oh how I wished we had these videos and the excellent descriptions & animation when I was going to electrical trade school... MANY years ago! (1974)
Hey you guys are awesome and very informative. You explain it well in ways I can understand easily.. Could or would you do a video on high-leg delta by chance? Thanks again!!
Love your videos! Easy to understand
Amazing video, so well put together. Thank you for these!
Absolutely brilliant video! Anyone would be able to fully understand that, well done mate!
Well done, great explanation! I've created a PSCAD case that simulates IM starting from star and then switching over to delta.
I am interested in this, where can I access your work?
Absolutely brilliant and very useful.
Thank you so much for this video. I now understand why there are strange voltages in 3 phase systems, and if that's all I retain, so be it.
Ok so I just finished this entire playlist and I must say it was an amazing journey learning all these interesting about the everyday objects we use they were made extremely well I must say
Glad to hear you're enjoying them
Thank you, you explain so well! I was wondering do you will ever do a video about yourself such as what type of engineer you are(electrical engineering?) or like how like long you’ve been in the field for. Since you seem so knowledgeable. Thanks!
This comment is weird 😻
Watts up!
I just learned on how a.c motor works on the physics level of it and i find enjoyable to see correlation between a.c and magnets including the creative way they can produce something like this.
Glad you liked it
@@EngineeringMindset hi may i know whatvsoftware you ise to create such animations?
What a brilliant video, probably the best one on here for star delta configuration 👌
Great and clear explenations. I learned a lot about AC. Btw here in the Netherlands they raised the voltage to 230 v many years ago. I did not know in the UK you have 240 v. I connected my 220 v appliances (via an socket adapter) to the UK wall sockets, and appearantly the extra 20 v did not do any harm to them... I just bought you a cup of coffee. Enjoy!
All your appliances are rated to handle some variation. The UK is now meant to be 230V but most places you'll read closer to the 240V mark still. Thank you for support us, appreciated.
Now i understand clearly the star delta config. I am wondering for this for so long time🤣
Great explanation with diagram thanks afff!!!
That's a clear explanation I was looking for about a week!
Great video
Very informative
Now I’m better able to understand the Delta & Star configurations.
Thanks again Paul @EngineeeingMindset
Glad you enjoyed the video
@@EngineeringMindset sir. i have question. is delta or wye configurations capacitor connection are the same? what capacitor connection should it be ? parallel or series at neutral line or live line?
I live in Australia in the hvac industry and I can say we use red, white, blue for phases and black for neutral unless it’s flex cable which matches European colour code.
Thank you so much!! These complex topics get easier when Animation is there.❤️❤️❤️❤️
Thank you man. I now understand the importance of star delta configuration.
Hi Paul
Thank you for this informative and amazing video.
I think beginners might be confused about the difference between the wiring of Delta connections shown in 2:50 and 5:00. Where, in the first connection, U1 and W2 were shorted, whereas, in the second, you shorted U1 and V2.
The reason behind that is that shorting any two terminals of different letters results in having the motor connected in a delta configuration.
Thank, I think you're right. We just uploaded some wiring diagrams to help with this also. EngMind.info/Star-Delta-Starters
I think that in the second configuration it will try to change the direction when it switches to delta, and then it will draw a huge current and blow the fuses
YOU ARE BRILLIANT AND NOTED THE BEGINNERS PROBLEM.I AM BEGINNER.THANKS.HOPE IT HAS 2 OPTIOS FOR DIRECTION CHANGE
This is the best video for star delta. Every engineers should watch this. Thanks
Absolutely right bro
You are Rigth i learned so much
Great content gentleman! the concept of start delta starting method is easily highlighted. thank you and keep up the good work
dude, this channel is absolute gold.
First class video.
You are the best among the best sir, this is the simplest explanation I ever have in star delta convertion. God bless you sir.
VERY BIG THUMBS UP MAN. I LOVE THIS. I AM VERY HAPPY TO FIND YOUR CHANNEL. GOD BLESS YOU.
You've done a fantastic job of explaining star vs. delta configurations. I might add that one practical application can be when you need to cut your motor speed (roughly) in half. I've seen this done many times. It can be cheaper to do this in applications where the precise change of motor speeds through the use of frequency drives (VFDs) is not necessary.
I am a little bit confused in automation Y ∆ connection, in ∆ connection the U1 and W2 should be L1, V1 and U2 should be Line 2 and W1 and V2 should be Line 3. Why in video 5:00 is different?
Same for me, im a still a student, please can someone explain?
@@josefernandosumbilon1146 The drawing is simply wrong...you guys are right. It would still work though, but the Delta would be a different and the engine would turn the other way. It would NOT work if you connect U1 to U2, V1 to V2 and W1 to W2, because then you just created a short circuit - 3 of them :-)
@@bluehome8193 I Noticed the samething, the drawing shown at 5:00min is wrong
Glad I’m not the only one confused by this
I connect U1 and W2 with R phase , V1 and U2 to Y phase , W1 and V2 with B phase and start the motor .............it runs in star smoothly but when delta contactor picked up motor windings get burn............it happens on 16-07-2021 ............I am unable to find the problem till yet........ please help me 😭
Greatly explained 👍
Thank you! This is a very clear explanation.
Thanks for the Great video.
The delta configuration which is shown at 2:50 is actually the reverse of the one shown at 5:00. Will it have any effect other than just reversing the direction of rotation?
Yes , first Delta Connection is
U1 to W2 , V1 to U2 , W1 to V2
second Delta Connection is
U1 to V2 , V1 to W2, W1 to U2
It's different. I don't know why?
Can anyone explain?
@@kaungmyatphone8576 tru guys, just a simple mistake i think
Genius! Simply explained, simply understand.
These videos are so useful to just come back and check on over the years as the old memory fades 👍
Delta connections at motor terminal:
L1 to W2
L2 to U2
L3 to V2
He doesn't say like that
You are correct bro.
Engr. Ashok
He just makes in difference way.. U1 can tap any of 2.. W2 and V2 And
V1 can tap U2 and W2
W1 can tap U2 and V2
But never tap 1 in the same winding..
They are still delta..
The thing you know is just basic one..
Marwin Tisado
My comments were in regards to min. 5:25
Motor terminals should be U1-W2, V1-U2, and W1-V2, because you need to be able to setup the motor for Star or Delta using the links.
Thus from the main contactor you will have connections: L1 to U1, L2 to V1 and L3 to W1.
From the star/delta contactors you will have connections: L1 to W2, L2 to U2 and L3 to V2.
Hope this makes sense.
@@rauln1426 Right
2.50 he said for Delta configuration connect L1 to U1 to W2, L2 to V1 to U2 and L3 to W1 to V2
5.55 contradiction for Delta as figure shows L1 to U1 to V2', L2 to V1 to W2' and L3 to W1 to U2
The motor will work fine indeed but that 'mistake can confuse people learning the base.
Its not just the sudden drain and voltage drop from starting in delta, the motor itself experiences very big forces. When i studied this stuff when i was a teen we got to do lots of practical stuff on our own, starting big motors in delta released big forces that would twist/shake the motors violently and it made terrible cranking sounds for a short time.
Or a sudden change of direction on a heavy induction motor with a flywheel or something like that will likely destroy the coils and bearings.
Sir..awsome explanation... it get clear by watching only onces...thank you so much...
This is amazing.....fantastic job thanks. Off to fault find and try to get a lift back in service and this has really helped me get a better understanding of what I'm checking for.
Thanks, I'll need to watch this a few times until it sinks in...
Do not worry about that, if you stop 10 white vans, with a electrician in it, 9 of them could NOT draw this schematic, without calling a friend LOL
There's a small mistake at 9:21. I think you accidentally said "divided" when you multiplied 20A * sqrt(3)
Thank you so much for the well presented video. The graphics is awesome. Gave me a very much needed easier understanding of the topic. Thumbs-up.
thank you so much for having these detailed explanations here . very grateful
Great video! Nevertheless, there is one question that crossed. When you start showing the automation of changing star-delta at 4:50, in the animation it is demonstrated that W2 is connected to the yellow phase, U2 is connected to the blue phase and V2 is connected to the red phase, when delta configuration is being used. However, earlier in the video, at 2:55 it is shown that U2 along with V1 is connected to the yellow phase, W2 along with U1 is connected to the red phase and finally V2 along with W1 is connected to the blue phase. So I started wondering, why is there a change all of a sudden, to be more precise, why in the case of delta configuration W2 is connected to the red phase, but when it comes to star-delta automation is W2 connected to the yellow phase? I really can not find any logic behind that and would be grateful if you could answer my question.
Yea I have the same inquiry and probably it was a mistake
I've watched this video multiple times and I caught that today and it confused me. Technically, it is still delta but it is confusing because normally delta is "across the line" which would be U1 to W2, V1 to U2, W1 to V2 and to be consistent with the live motor that was shown, it would be the same. Still a great video and I have recommended it countless times to people for a good visual to understand at least the concept.
same here.,As electrical maintenance, I have not seen a connection like that before... I tried to simulate it and it doesn't work.
I was hoping someone would have responded to your question because I too got confused when he introduced the contactors and started making the connections.
This is addressed in a comment posted by a guy called "G" a few comments below yours
Awesome video. I'm curious how the cross phase of wiring doesn't create a fault.
Minor edit needed @ 9:21, meant to say multiplied by.
@@scottkasper6378 there a video to explain, or example? Looks like on a CW rotation, can connect to the ascending phase, but does that need to go through a load or how that work?
@@MattFerguson26 It has to go through a load of course, or the resistance will be 0, thereby also the voltage drop will mean that the circuit will be at 0V. The breaker will also pop since you will be drawing too much current.
I = V / R?
prasley bustommy and v=IxR and R = V/I
Seen our new incredibly detailed MCB video? link: th-cam.com/video/gqEu9t8HwW0/w-d-xo.html
Brilliant work..you must be a good Engineer
Thanks for the delta and star connection today i had given my 3ph 3hp motor for rewinding the guy had made the Delta connection to start i was worried about it cos i didn't had any knowledge about it and the guy had told there will be no prob at all only 3 wire's will get less that's all the difference.
Your video is so simple anyone can understand about the connection easily.
Ur really great.
Thanking you again.
New subscriber for ur channel.
God bless you sir.
The timer from my experience has a delay change over time of 40ms. This is to allow the arc generated on the star contactor to dissipate when switching off before the delta contactor energises. I have a formulae that works out the motor direction without energising the motor as long as the main supply is in synch
Correct me if i am wrong, but as an industrial electrician for 40 years, we used to set the timer to allow the motor to accelerate to full (or almost) full speed. this is mainly to reduce starting current on a limited capacity supply
"I'm using the old Red Yellow Blue color coding because I think it's easier to see" Exactly why we should have kept them compared to the dark and drab Brown Black Grey
Well, those colours were an EU thing, now you can change back at will.
@@jesperdahl1486 I doubt we will though... Mainly because the new colors are used to identify that the installation must comply with part P regulations
I think it would be good to use the old colors but I have a feeling that if they ever do change again they'll sooner be a new color code completely
For beginners that is certainly true. But in the real world it hardly makes any difference.
Once your worklplace is clean enough to work there you can distinguish the dirfferent colors pretty easily.
And once you go into wires with 11 leads then each individualbone will have the same color anyways. And you have to look for a small printed number on the wire for identification.
@@theonly5001 The worst is old communist stuff. Everything is colored black or red for phases and Blue for neutrals, oh and sometimes there are no printed numbers for indefication XD
Hi Paul thanks for the great video., love the graphics so easy to understand and the way you explain it .,
would you consider in making a video on 3-phase rotary converters for those of us witch need 3- phase at home ., cheers, keep up the good work.
Very practical 👌 and precise explanation, wish Lecturers could explain like this back in University.
What about the relationship between voltage difference 58% & current difference 33% , why not both a positive ratio?
if yor motor is 380v and running in 230 volt you will not get the nominal power after you move to deltaconnection you will got the nominal power
Love channel. One of my favorite channels for sure.
These videos are so under rated...
I may be wrong, but at 5:00 shouldnt the wire from V2 be conneted into the L3 and also U2-L2 W2-LI, effectively W2-V2, V1-U2 and U1-W2 would be connected together making a delta connection, but they are flipped again
yes you are correct
You are right
i came in comment section to verify this.
Seems to me that the diagram has an error. The Delta contactor's wiring looks to be out of phase. At 5:00 and onwards, Red wire (left contact) should go to W2, Yellow wire (center contact) should go to U2, and Blue wire (right contact) should go to V2.
Absolutely. As we see the connectors in the terminal box without contactors
The Engineering Mindset: 1 year ago
"Alright guys calm down. It isn't a mistake it's simply a different way to connect it. You can change the direction of rotation by changing the connection. The manufacturer will provide a connection drawing and we have provided two on the accompanying article. I've provided multiple links to this but again it's here theengineeringmindset.com/star-delta-startes/ "
Very good to detect the wrong point.
@@diagorasofmel0s but on video during explaination of automatic WYE Delta connection he does not metion about changing rotation. So it is kindi confusing
@The Engineering Mindset please can you explain this, i confused to.🙏
Wow... i never imagined how it really works i read n explained verbally by many i never stood.. it gives me clear image how it works... amazed by ur explanation.
Haven't done a star-delta starter system in a long time, so thanks for the memory refresher!
Excuse me, I ask permission to take a video for my thesis data, is it permissible?
PIERWSZY KÓRŁA!
This channel is the best for electrical components explanations