Basic Motor Control: 3 wire Start Stop Circuit

#AccessToPower #MotorControl,
In this video, I demonstrate a 3 wire Start/Stop circuit. I describe each of the components involved, such as the motor starter, overload, start pushbutton, stop pushbutton, and control power and how they work. I then screencast a simulated circuit so you can visualize exactly what is happening in the Start-Stop Circuit. In the next episode in this series of video's, we will add multiple start-stop stations and demonstrate via the onscreen live simulated schematic how they work in the motor control circuit wiring.

[ktoectbkto]

This is the best video I have ever seen with a thorough explanation of the circuit especially if you are a self learner as I am. Eleven minutes of this video equals to weeks of learning in schoool. Good job sir, keep those videos on rolling out!!!

[garza]

6 weeks of motor controls class summed up in 11 minutes. Great, simple, effective content.

[SmiTTyy-shnc]

"Latch circuit" That term helped me remember that using a N.O. Aux. contact keeps the circuit energized after pushed. Great explanation video !!

[D.Hozzie]

Hey Walter. I have been “ one of those electricians “ for a long time. The MC aspect has kind of stopped me in my tracks quite often. I work for a zoo and so my duties as an electrician can vary greatly. Thank you for this and “ sparking” my interest with bettering myself. Good things!

[SH-pcxt]

Thanks so much for this video, and the entire series!! Just a hobbiest, but am installing CNC mill and manual lathe in home shop. Came to these videos based on VFD intro videos, stayed to watch these basic tutorials on motor control. Last year I had 2 electricians helping me to troubleshoot a 20 yo but "brand new, unused" 18" bandsaw. Couldn't get it to start even though all the switches seemed fine. I finally discovered that by manually closing the contractor, the motor would start, thus eliminating the motor as "the problem." I used a volt/ohm meter to verify that power was making it to the motor control inputs, and that the basic control switches were working as intended. I went so far as purchasing a replacement control unit from Amazon but then I was stuck. 
The second electrician was brought in at this point. He was able to diagnose the problem with the original motor control unit (from ~1988)--the primary relay coil had break somewhere so it would not energize. The contractor units have been standardized for decades, so the second electrician (the 'motor-control whisperer') as able to harvest the coil unit from the Amazon replacement and use it in place of the original unit. Everything just snapped together and now the unit operates properly with it's original control switches and front panel intact. While this was a great result I don't like to think about how much all that cost (lets just say a few hundred dollars). Having watched these intro videos on Motor Control and 3-wire start/stop circuit basics, I could now understand better how it was all working (or not working). Don't know that I would have figured out what the problem was, but at least I would have had a chance.
Finally, I'm going to keep watching this series because, for example, I may want to add an additional stop switch to the bandsaw. The red momentary NC switch assemblies are readily available on Amazon. From these videos, I think I understand how to add more to make the machine safer to use with a more accessible STOP switch.

[EricJudd]

I watched quite a few contactor videos and this is the only one that clerifies how contactors work.

[tedkiser]

Absolutely the best and clearest description of a motor starter that I've seen. Thanks

[dtv]

Damn, where was this video when I took motor control. Excellent job.

[garysackrider]

I've been doing electrical for 25 years and just now start doing motor controls and this really helped me out a lot thank you

[RR]

Clear, thorough explanation of basic start-stop MC circuit. Thank you

[stevepatterson]

This is the best illustration for a basic motor starter. Thanks!

[mistertruth]

I wish all journeyman, foreman, instructors, ... were like this guy.
GOD BLESS THIS MAN!

[boxcutter]

Thanks for the wonderful video! A presentation explaining how a relative novice can best cobble together misc budget/auction items together to form a versatile workstation would be monumental.

[denniscoates]

Great video. In water/wastewater industry. This type of online training is priceless. Thanks for the service!!

[alfredminor]

Great job, you simplified it without over talking it... brilliant

[adamszajman]

the visual of the hardwired to diagram really helped, thanks.

[thokubina]

One of the best videos Ive seen on the explanation of this, especially for a refresher when you haven't been around it in a bit, thank you!

[craigseib]

You’re an excellent teacher. Your thought pattern combined with great visuals really reach the audience especially those who learn differently. Thanks for the efforts.

[insteelitrust]

I am a me engineer. I started to watch your videos today and amused by quality and simplicity of the information that u share. Thank u very much for the hard work. U would be an amazing teacher.

[davidrobertson]

Thanks, for taking time out to help us. Videos are great.