I really appreciate u, u have helped me as an electrician to understand more about automation industrial engineering,long live, god bless you, iwill let my son studying begin to follow ur lectures on line, thxu Best regards
You are very nice guy who explains simply and accurately. The problem is this industrial electrics that there are too many arrogant and bully engineers there who purposely confuse you and let you down. If I had more people like you, my studies could have been less painful. Thanks!
Great job brother....but just a suggestion...why not use the auxiliary contact (NO) of the delta contactor to keep the main contactor energised when the star connection time elapses..... because using the auxiliary contact of the main contactor mean when the start push button is pressed the main contact also start immediately....
Good explanation but you said in this circuit star contactor should energize first before main contactor. Qn why star first while the motor will not start if both main and star are not energized.
He just explain the logic here. If you see it properly, I think you'll see, the main idea here is the ADDRESS. The contact that the main rely on relies on the address of the star coil, so star has to come ON first followed by the main, bear in mind that that happens in short space of time (as he mentioned, by the blink of an eye), so if the motor relies on the main, then the motor won't start if star coil is OFF or not energized. This is the result of main not being energized, hence causes the motor to remain OFF.
Thanks brother for the video. It's good. Point of injection: Use the main contactor NO across the start pb switch so it serves as the master switch; It will stop entire control network if the Stop Pb switch is pressed. The main contactor should work with both the star and delta contactor. The main contactor should control the timer coil from the action of its NO Auxiliary contact. It's the timer's duty to switch between the Star and Delta contactors with its NC and NO contacts respectively with the set time.
Thanks David, during demonstration,u said this goes here , and that goes there, especially energizing the main contactor, there are terminal, there marked 13 ,22 and 14: and 21 so which one do mean inside nor out, please clarify by naming the terminal nos and either no or nc
mr sir there is no reason to interlock the main contactor. the main and the star come in together at the same time. lets assume we are using pneumatic timer that means it should be coupled with the main contactor..maybe u can add a hold in for delta and disconnects the timer from the by adding normallt ope interlock for delta on timer circuit.
Hi. Thanks for the video. One question: Why the NO of the timer is needed before delta contactor. Delta contactor will energize without the timer NO being there.
Plus is the power being supplied through the main contactor or from where is the power coming from since on the main there is no where it's indicated as to where the power is coming from to the main contactor ?
@@electreca1 plz send you complete panel wiring video's interlock manually auto motor protected and all 11&33&110&220&400&600 kV vcb power really wiring and ct pt box termination and drawing and small trans former design wire selection core selection bobbins selection and formulas releate charts PDF and every panel wiring PDF and substation commission and PLC and every thing electric part send videos
How long are timer set before the Delta get enrgized which are going to be brought in by the timer coil...because the minute you leave the start button ,the circuit will be de-energized,start wont be retained because the main contactor dont have power yet ....meaning the entire circuit will fall out again...star en timer
The main contactor help to hold the circuit that's why we use push button to make the circuit more safe to operate and reliable, if you remove main contactor then you have to use a switch(not push button) which will keep the timer permanently on during operation. As long as the timer is on, circuit will remain running.
My question is star Auxiliary is closed or open? that's what am not getting....in the explanation u Said it's closed but in the diagram it's open so.....
I did a practical video for this topic, however, some viewers requested more clarification on the circuit diagram.................. here is the practical video th-cam.com/video/we7MxJ0fjDM/w-d-xo.html Thanks for watching.
Brother thank you for your video.But i have a qsn about the second Main auxilliary you have introduced down there.Can you just make a loop wire from Main auxilliary and bring down and bypass it,and connect at the second terminal of STAR AUXILLIARY BLOCK?
Bro! My question is when push button pressed the phase will pass to Timer and start to count as as main contact make the also pass to normal close of timer and pass to Auxiliary contact of delta contact then to A1 of start contact, I'm confused to this Auxiliary contact which will put above the contact start since we use the NC aux when pass phase make and become open while holded to cont start why still make because NO means phase will blocked via to star contact ???
That s a bit complicated! What s happend if you don t have a star delta time relay? And you use to many NO aux contact from main contactor! I hawe one diagram much simple and wich never fail!
The timer I used it Normally closed, so it has to be and remain energised to hold the Delta contactor on. If the timer coil de-energise then delta will lose power. What do you think?
Timer protection these days is recommended coz the timers in market are week ,let the timer be switched from NC delta and on the timer switch NO put a hold cct from no delta
Put NC for delta to switch timer ,then put hold on contact on timer NO to switch delta this will help timer to be always off when motor is running on delta contact
That circuit i drew on the board is CONTROL CIRCUIT for star delta stater, unless you need a power circuit. you can find it here electrecasolutions.com/understanding-star-delta-starter/
Remove normal open on the main that can make your circuit simple main and star can start together you just confused lot of people but pose uncessary normal open on Main
I really appreciate u, u have helped me as an electrician to understand more about automation industrial engineering,long live, god bless you, iwill let my son studying begin to follow ur lectures on line, thxu
Best regards
You are very nice guy who explains simply and accurately. The problem is this industrial electrics that there are too many arrogant and bully engineers there who purposely confuse you and let you down. If I had more people like you, my studies could have been less painful. Thanks!
I appreciate the compliment and thanks for watching.
Keep it ahead about giving the whole world ,
advanced electrical knowledge and skills
You are a nice teacher Sir. You have helped me understand this circuit.Keep it up.
I love this channel now,I found it today and am really grateful🎉🎉good work mwalimu,came here after not understanding in class😅
Good job bro, but main and the star contactor comes in at the same time.
Good
But that's not how it's supposed to be, it's Star fast then mains.thanks
Great
you are very nice brother.very easy explain to understand us.thank you so much.
Thanks Sir, today you made my day well presented video I did understand every single word you spoken
Glad to hear that and Thanks for watching
Great job brother....but just a suggestion...why not use the auxiliary contact (NO) of the delta contactor to keep the main contactor energised when the star connection time elapses..... because using the auxiliary contact of the main contactor mean when the start push button is pressed the main contact also start immediately....
My thoughts exactly
You're a great engineer sir
I like your lectures
Good job bro continue teaching us
It's my pleasure
Good explanation but you said in this circuit star contactor should energize first before main contactor. Qn why star first while the motor will not start if both main and star are not energized.
He just explain the logic here. If you see it properly, I think you'll see, the main idea here is the ADDRESS. The contact that the main rely on relies on the address of the star coil, so star has to come ON first followed by the main, bear in mind that that happens in short space of time (as he mentioned, by the blink of an eye), so if the motor relies on the main, then the motor won't start if star coil is OFF or not energized. This is the result of main not being energized, hence causes the motor to remain OFF.
I love u so much ur videos are good and well scientifically explained,
Hi , I like your video. Thanks
Very lovely, you have made me go back to school
Thanks for watching.
I follow you Everytime
Thank you every much
Thanks brother for the video. It's good.
Point of injection:
Use the main contactor NO across the start pb switch so it serves as the master switch; It will stop entire control network if the Stop Pb switch is pressed. The main contactor should work with both the star and delta contactor. The main contactor should control the timer coil from the action of its NO Auxiliary contact.
It's the timer's duty to switch between the Star and Delta contactors with its NC and NO contacts respectively with the set time.
Thanks David, during demonstration,u said this goes here , and that goes there, especially energizing the main contactor, there are terminal, there marked 13 ,22 and 14: and 21 so which one do mean inside nor out, please clarify by naming the terminal nos and either no or nc
Pppppppp hi nhi ho skta ki a hai pyar ki asi thila ok I
mr sir there is no reason to interlock the main contactor.
the main and the star come in together at the same time. lets assume we are using pneumatic timer that means it should be coupled with the main contactor..maybe u can add a hold in for delta and disconnects the timer from the by adding normallt ope interlock for delta on timer circuit.
P
The main contactor just latches and keeps switched on
Great job sir❤
good work and educative lesson
So good sir am learning and enjoying thxu
We are approaching amillion subscribers, bro thanks for your videos that are educating am from turkana county
Thanks so much Pius....by the grace of God and hard work we will hit a million
Please add yu number sir if we need any assistance we will contact you.......or we can great group....
Great works indeed. Am learning every day
Thank you so much. This is crystal clear.
You're very welcome!
Knowing starters and backups means that am done with automation??
Please help me with a manual forward and automatic reverse starting of a 3 phase induction motor
Very educative sir....thanks alot. I have a question: if the main contactor energizes last then, which contactor does the holding role?
Thanks for the explanation 👍👍👍
Kazi nzuri boss
Asante
Nakubali mzee
Nope namba zako nikucheck mkulu
Good job.. Iam requesting you do alarm bell sirens using relay for 8,12,14 pin.
And using relay in controls more machines
OK will consider, thanks for watching
Hi. Thanks for the video. One question: Why the NO of the timer is needed before delta contactor. Delta contactor will energize without the timer NO being there.
Can it gets energized without no
Thank for that
Plus is the power being supplied through the main contactor or from where is the power coming from since on the main there is no where it's indicated as to where the power is coming from to the main contactor ?
Uv made me clearer
It's good on that circuit to protect the timer
Good work papa
Appreciated
Well explained to the point 💪
Thanks for watching
How can someone solarize the induction motor especially the star delta ones?
Which inverter?
ty my man. simple explainantion.
Valuable information sir
Thanks and welcome
@@electreca1 plz send you complete panel wiring video's interlock manually auto motor protected and all 11&33&110&220&400&600 kV vcb power really wiring and ct pt box termination and drawing and small trans former design wire selection core selection bobbins selection and formulas releate charts PDF and every panel wiring PDF and substation commission and PLC and every thing electric part send videos
Thanks your for the teaching
What wil happen if a main contactor energised before the star and the star pulls in after?
How much is one contactor and a time? I need them for my practicals
Good explanation
How can you put an isolation switch in this wiring ?
Sir ur very true and perfect thxu
Hi
what will be happening if main contact and star contact at a time start
How long are timer set before the Delta get enrgized which are going to be brought in by the timer coil...because the minute you leave the start button ,the circuit will be de-energized,start wont be retained because the main contactor dont have power yet ....meaning the entire circuit will fall out again...star en timer
What is the purpose of the star Auxiliary contact on the main contactor sir
Why do we need the main contactor in our circuit. Is the circuit not gonna work if removed?
The main contactor help to hold the circuit that's why we use push button to make the circuit more safe to operate and reliable, if you remove main contactor then you have to use a switch(not push button) which will keep the timer permanently on during operation.
As long as the timer is on, circuit will remain running.
I was really getting the mode of operation,but got confused about the illustration on main contact connection after the star disengage
My question is star Auxiliary is closed or open? that's what am not getting....in the explanation u Said it's closed but in the diagram it's open so.....
great keep going sir
Thank you, I will
WHERE CAN I FIND YOU SO AS YOU POLISH ME FOR THE NOVEMBER SERIES EXAMS ..KINDLY
You mean maincontactor Will consist Three auxiliary which is normal open?
That star oxilary is it 13-14 on Star
Thanks sir kindly produce for me ,star delta starter reverse forward wiring diagram
Good work , congrats.. But sorry we need pratical if possible . God help you
I did a practical video for this topic, however, some viewers requested more clarification on the circuit diagram.................. here is the practical video th-cam.com/video/we7MxJ0fjDM/w-d-xo.html
Thanks for watching.
What if the star connection those not connect what will will do.
I can't get your question my friend
Can you tell how it switches from high voltage to low?
Good job thanks for this
thankz sir for yourb clear explanation
Brother thank you for your video.But i have a qsn about the second Main auxilliary you have introduced down there.Can you just make a loop wire from Main auxilliary and bring down and bypass it,and connect at the second terminal of STAR AUXILLIARY BLOCK?
If you do that the Main contactor will engage before the Star, yet our primary goal is the Star to engage First
Bro.now it's clear now after i followed your video and demonstration
sir, why did you use that H switch, i couldn't quite catch that. My point is that if there is main auxiliary, what is the reason for using H switch?
The H aux is to hold the timer and the m contact is to hold the main contactor
Thanks engineer
In this star delta connection after few seconds circuit will change star to delta in this time main contact in on position here any happend?
You explained very well come up with practical. and I request you to repeat on forward and reverse especially on the indicators that is my big problem
No problem I'll do that
Does it also apply to transformers
Hi.... can i find a video on how to install a 3phase submersible pump
We have circuits that put in the main and star at the same time is it wrong ? If yes tell me why?
Do you deal with only 33kv or even the single phase
thanks, well presented
Kindly am asking if you can assist me with the traffic light circuit diagram
Bro! My question is when push button pressed the phase will pass to Timer and start to count as as main contact make the also pass to normal close of timer and pass to Auxiliary contact of delta contact then to A1 of start contact, I'm confused to this Auxiliary contact which will put above the contact start since we use the NC aux when pass phase make and become open while holded to cont start why still make because NO means phase will blocked via to star contact ???
Good job bro please my question is how can you wire it involving emergency push button
you can wire you Emagency buuton circuit beaker and Overload relay. thanks for watching
Great explanation indeed
So main NO should be two?
Yes, to be able to engage star contactor first.
Thank you
You're welcome
That s a bit complicated! What s happend if you don t have a star delta time relay? And you use to many NO aux contact from main contactor! I hawe one diagram much simple and wich never fail!
Good. But I think it will be nice if the timer coil can be de-energize after switching to delta
The timer I used it Normally closed, so it has to be and remain energised to hold the Delta contactor on. If the timer coil de-energise then delta will lose power.
What do you think?
Can you pls show me how do star delta foward reverse with four magnetic Contactor and one timmer
Sir very interesting but can you change your colour of marker? Your writing not clear for star, delta wiring
Very good content. Keep the good work.
Thank you
This is very nice
please do me that of float switch+ bladder tank switch+contactor+selector switch
Eng.what is the diffrence between delta connection and dol
KEEP IT ACHARD ABACK
Excelente profissional
Thanks very much
You are welcome
Nice one
Good Engineer
Timer protection these days is recommended coz the timers in market are week ,let the timer be switched from NC delta and on the timer switch NO put a hold cct from no delta
Put NC for delta to switch timer ,then put hold on contact on timer NO to switch delta this will help timer to be always off when motor is running on delta contact
Teacher thanks for video 🙏....but sir if possible I need circuit connection please
That circuit i drew on the board is CONTROL CIRCUIT for star delta stater, unless you need a power circuit. you can find it here electrecasolutions.com/understanding-star-delta-starter/
Thanks Teacher
They gave us please but he can do it again
Bro , I request u to take us through motor winding
How do we connect a timer without coil
What kind of timer is that?, timers wether digital or analog have got a coil.
Thanks for watching.
@@electreca1 Thank you for your response. The timer has only NO and NC
Remove normal open on the main that can make your circuit simple main and star can start together you just confused lot of people but pose uncessary normal open on Main
hello David. can you pls do a video on how to connect a 3phase ats signal cable to amf25 pls
Will plan, thanks for watching
Good stuff man
so a star and a mean work like a duble mcb
which of the connection is that'
Kindly ask your question again.