⚠️ *Found this video super useful?* Buy Paul a coffee to say thanks: ☕ PayPal: www.paypal.me/TheEngineerinMindset Download video here: ➡️ electricl.info/star-delta-download
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..
@@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.
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.
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.
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!
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.
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
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.
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!
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.
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.
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
I am a chemist and an organist, but no electrician. Wind for organ pipes is usually supplied by a large "squirrel cage" blower and a 5-to-50HP, 220V, 3-phase motor. This video brought a keen understanding of the "breaker box" that controls the motor, although I would never mess with it. Many thanks.
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)
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.
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.
Sir, I am a fan of your channel. Nicely explained. Before this I have watched 🌟-delta from many RU-vid channels but they are useless. Clearly explained. Sir please make video on 🌟-dekta control wiring. I am waiting. Thanks in advance.
Thanks a lot... You literally explain things better than boring college lectures... I wanted to understand this so badly. This video was super useful 👌
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.
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?
@@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 :-)
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 😭
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.
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.
while I was in college - I majored in IT, but we had to listen to classes about electricity and electronics - nothing made sense back then. Now it does! I'm not an electrician, but I love to learn stuff about this, as I do work around my house everything regarding electricity! Safety first, people! Always double, triple check your circuit breakers! :)
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.
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?
I am not an electrical engineer, but as a hobby, I am very interested in electricity. I was able to find answers to many of my questions that I could not find answers to myself from your videos. Greetings from Turkey.
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!
To some people confuse about his connection in delta read this.. He just makes in different way.. U1 can tap any of 2.. W2 and V2 And V1 can tap U2 and W2 W1 can tap U2 and V2 They are also delta. But never tap 1 and 2 same winding like you u1 and u2.. The thing you know is just basic one.. Thankyou so much your video..
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
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.
As someone who had an 8/10 on this exam. This made it a lot clearer for me now. This is more real world like. I could do the math easy by just noticing the right words. But when faced with this irl I checked this video first. THANK YOU !
I'm a mechanical engineer that has just retired after a 30 year career. I must say this video was brilliantly explained. If RU-vid had been around when I was a student life would have been a lot easier...:)
@@mahadljama4578 Ahh yes I graduated in the UK but it has been many years since I emigrated to the USA so I am not familiar with the employment market there. I do wish you the best of luck. Where did you study?
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.
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/ "
@@diagorasofmel0s but on video during explaination of automatic WYE Delta connection he does not metion about changing rotation. So it is kindi confusing
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.
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.
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.
you don't know how much you helped me, I wish I could have a 3d explanation of every topic that is difficult to unedrstand, thank you very very much, at present time I am not able to support you but believe me I'm going to really pay you when I will be capable of, thank you thank you very much
Did this in secondary school, used to design the power and control circuits. There is a mechanical switch between the star and delta contractors that prevent both of them to close at the same time.
Thinking back to when I was a kid (Late 50s early 60s) The farm I lived on had corn (Wheat and barley) dryers and a grinder These had 3 phase motors with star-delta starters The box(es) had a big red stop button on the front and a handle on the side Push the handle down for the star, when the motor is up to speed, shove the handle up for delta and if you have done it right, it latches into delta mode. If you haven't, start again. When you come to stop it, hit the red button and the handle unlatches
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
Hi there super helpful video. Helps me understand and grow as an electrician. Quick side note, im from Australia, we generally use RED, WHITE, BLUE as our three phases.
@@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?
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
Do you have, or are planning to make, a video that explains why a single-phase motor needs a starter capacitor? Your videos are a joy to watch for their clarity and good production values. Thanks!
@@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.
thats some awesome work with that animation ...you should be paid for this stuff more than the old fashioned university teachers...again great great work keep it up buddy!!!
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!!
Ohh man, this video is a work of art, I am studying to become an electrician in a good place with a good teacher, but your explanations are in a whole new level.
Simply genius, after 18 years due to your graphic I understand that due to neutral point in star configuration we get near about 1/3 current. Heads off
There used to be a semi manual approach to changing over star-delta Allen West had dashpot starters where you had to press the start button then change over using a manual handle to operate the change over contacts. Whilst crude compared to using contactors the Allen west dashpots were very robust and were able to tolerate poor environments and misuse.
The wires are in the 'wrong' order at the W2-U2-V2 terminals in the automated animation. Although this will not affect the operation of the motor, and many industrial schematics are drawn this way, it might confuse people.. Otherwise very nice animated video!
so we had several classes on this at school. i have actually BUILT this system and it was functional. but i still had no idea what i was doing. thanks to this video i now know.
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..
When i was in college i made upo a way of wiring star delta and i made it so easy i aced my trade test. I just draw a triangle, Label each corner, And i label them like this L1, A/c .......L2 B/a .........L3 C/b . Then i would wire the motor using my small diagram and when im done push the button and it worked every time. EVERY SINGLE TIME. Of course i was told i was wrong in my method but it worked.
