How Electric Motor Overload Protectors Work & How To Test Them!
Vložit
- čas přidán 31. 12. 2019
- How to test, troubleshoot, or repair swimming pool, sprinkler pump, and well pump electric motor thermal overload protectors. Motor too hot, will not start. Learn exactly how they work, and how to wire them. Enjoy the video!
Support the creation of new videos on this channel by watching the ads placed on my videos, shopping for items shown in my videos at the Amazon/Banggood links provided below, or by making a Paypal donation. All donations, big or small, are greatly appreciated. Thank you!
Amazon: amzn.to/2Lg902l
Banggood: bit.ly/2COi2P0
Banggood Flash Deals: bit.ly/2HBu9oq
(Affiliate Links)
Paypal link: paypal.me/electronicsNmoreYT
Bobby Tectalabyss: Thanks for your generous $5 donation!
Jeff Barr: Thanks for your generous $25 donation!
xrayjim: Thanks for your generous $25 donation!
Ryan Pedersen: Thanks for your generous $20 donation!
Thanks For Watching!
**If you enjoy watching my videos, then be sure to SUBSCRIBE & click the notification bell(set to "ALL"), SHARE links to my videos with others, rate "THUMBS UP", and check out my extensive video playlists for many other videos of interest to you. Doing so helps to ensure that many more videos will be uploaded to my YT channel in the future.** - Jak na to + styl
You did a great job explaining the overload protector. I recently had one of these go bad in an electric motor is this video is very helpful. Always a thumbs up and looking forward to the next video!
Thanks for the positive comment! Your latest video with the RV was hilarious!
@@electronicsNmore I liked the upgraded exhaust pipes! :)
@@ThePreyMantas It was so funny because it looked so ridiculous. He makes great videos.
VERRRY NICE INSTRUCTIONAL VIDEO. I was impressed. I subbed. (I have been used to overloads in motor-control cabinets. Very easy to access and change.)
This was well explained and quite educational. Muchas gracias! 👍
Very cool 👍
It's like the self Resettable Fuses but with extras 🤔
Hi Doug. Very well done and informative has always buddy. I hope you and yours had a great Happy New year. Has always I Liked,Shared,Added to playlists. All my best for the new year.
Thank you Bobby! Hope you have a great 2020!
This video saved the day! I was about to chunk my compressor:
My manual overload switch was stuck open even when trying to reset it. I had to take the adjuster out or reset it. Still have cont8nuity between 1 and 2 and 1and 3 but getting there...
👍 Great explaining. Thank you
Very well done,
Very helpful.
Glad it was helpful! Be sure to rate thumbs up, subscribe, and look over my extensive video playlists below for many other videos of interest to you. Taking one minute to share a link to my channel with others on social networking sites would be greatly appreciated. Thanks
czcams.com/users/electronicsnmoreplaylists
Happy New Year 🎉 Good stuff👍
Thanks Orley! Happy New Year to you also.
Outstanding video!
Thank you very much Chad! Be sure to look over my video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others on social networking sites.
czcams.com/users/electronicsnmoreplaylists
thank you sir for sharing that is really awesome!!!!...
Excellent description and video!
Glad you liked it! Be sure to look over my extensive video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others. Thank you
czcams.com/users/electronicsnmoreplaylists
Hello there! I haven't been a subscriber for very long, but what MADE me subscribe to your channel, was how IN DETAIL you go in explaining HOW things work. Most electronics vids I watch keep me questioning things and get me aggravated like, "Aww MAN, WHY DIDN'T you show what terminals to hook up, DAMMIT!?!" Lol, things like that. I learned some AMAZING THINGS watching your vids. More power to you my friend! Keep doing the EXCELLENT job you are doing! Thank you so much for sharing your knowledge. 👍
Thanks for the kind words! Be sure to watch my other videos and share.
@@electronicsNmore DEFINITELY!!!!!
It's smart. Really smart 👏
I have a three wire thermal overload protector that has continuity between all three wires when cold. The motor has power to it and does not hum or get hot. The on/off switch works fine. This is on a table saw motor. The op went out one time before and replacing it fixed the problem. Is the op bad?
Please add a short bio about your background and interest in teaching. This is a very well done presentation, the best I have seen after a few hours of searching the internet for information and operating/wiring info for my Klixon thermal protector . Thank you.
Glad you enjoyed it Ray! Thanks for the donation, it was much appreciated! I have many videos explained just like this one. :-) Since I was VERY young, probably around 8 or 9, I started taking everything apart to see how it worked. I never stopped.
superb...thank you
Welcome 😊 Be sure to look over my video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others on social networking sites. Thank you!
czcams.com/users/electronicsnmoreplaylists
great job
Thanks Peter! Be sure to look over my extensive video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others.
czcams.com/users/electronicsnmoreplaylists
Thanks for the great video. At about 6:10 you say that if you turn the screw clockwise it will "make the temperature higher. And if you want to increase the temperature, you would want to go counterclockwise." I'm confused. It seems like you're saying you can make the temperature required to deflect the disc higher if you go clockwise or counterclockwise. Please explain.
The disc is curved a certain way. The screw puts pressure on the disc helping it to bend and pop in the opposite direction easier, which lowers the triggering temp. No pressure on the disc, a higher temp is required to trigger.
nothing but perfect . thanks a lot (:
What?
@@electronicsNmore perfect ! easy to understand ! i love it (: thanks again.
Happy New Year
Same to you Ed! Thanks for watching!
Really interesting , thanks for posting. I have an electric 12 volt 400 watt motor with two long leads (3m) for the thermal protection, these normally lead to a control panel so I can reverse the motor which foils a sail. but my control panel is an older model and not sure where it would go , Could I buy a cheap overload switch ? But not sure how would this detect heat ? Thanks in advance for any info.
I have no idea what kind of protection you have using just wires.
My PMDC motor 220vDC (2wire) does not have protection. How can I retro install protection externally or internally?
Please how is overload protector attached to the body of the rotary compressor for temperature sensing?
Good demonstration, thanks.
BTW I have a question about bronze or brass brazing a stainless steel to stainless steel or to mild steel, is it possible or not?
If you have had any experience with it tell me about it.
A bronze rod, using the right flux and high enough heat should work. Thanks for watching
Hi,.I just want to know if this reley is actually responseble for switching the fridge compressor on and of?
No, the thermostat does that.
You're a genius Happy new year 😃😃😃😃
Glad you liked the video Rick! Please share.
You can order devices like these for Coffee makers, Heaters and other heat related items. rated at various Wattage / Temps. Handy little beast. These use the Current generated Heat (WATTAGE) to do the heating. Same things just different applications. Replacing the Therm o Switch in a Coffee maker from 210F with a 175F unit I was able to convert my coffee maker into Mini Ethanol Distillation system.. LOL Local Law and Regulations apply. Snerkkkkk.
They sure are super handy. Thanks for watching! Have a great New Year!
I'm looking for a replacement 3-wire thermal protector for a 1/3-HP carbonator pump motor, and can't find a source. Any hints on how to find vendors for these parts?
Hello Ralph. Many have terminals for 3 wires.
amzn.to/3bpGeHG
(Amazon Affiliate Link)
hi i purchased a blender with wattage 1600 and overload protector it has is 4 amp where i live the value of ac is 230v from my knowledge of physics the blender should not be 1600 watt instead 920 watt or less if you consider power factor etc. am i missing someting or i'm right about the calculation. can you help
It acts like a very slow fuse, so during peak amp draw it heats up but will not blow Everytime motor start or it momentarily hits a max load. Peak power rating > normal full load power.
on my overload protector it says: B85-105 100702, how many watts or HP is that ?
YES、bimetal
Also to the safety device of the water heater
bi metalic switch are in all sorts of stuff microwave ovens, hair dryers, heaters, welders, thermostats, amplifiers, boiler's kettles, toasters and on and on basically any thing that could over heat and as a result be damaged and or dangerous.....
Thanks for watching!
Time out chief? Is the heat source in practical applications generated externally by a motor or by current flowing through the so called "restive wire" as you claimed in the video or is it both? I think it is not meant to be restive wire at all just a conductor here?
It's a resistive element. The schematic symbol shows it, as well as the datasheets.
@@electronicsNmore Thanks very much for clearing that up. So over current in the form of heat trips this? That is the design idea not actual external heat from the motor housing? In other words, you could have demonstrated it with excessive current flowing through the restive element no heat gun and an amp meter with of course a source?
Hi Sir why motors need overloads when it has circuit breaker which does both?
Heat
What about pin one and three should there be continuity?
There must be another contact point. Go between the pin and metal body of the OP.
If it is faulty will it cause a breaker to trip
No
diagram looks wrong it shows the start winding connected through the heater element surly it should be the run winding on series with the heater? nice vid fellla
Tested to Destruction - It’s correct. The heater makes the thermal switch activate faster. This is good, for things like refrigeration compressors. If you stop a compressor, and then try to start it again, before the inlet and outlet pressures have equalized, it will ‘dead head’ the compressor, causing it to stall. In a case like this, you want the thermal switch to trip faster, to protect the motor start windings.
On modern, digital thermostats, they typically have a built in delay, of about 2 minutes, before restating the compressor. On the old mechanical type thermostats, they didn’t have that delay, which is why these overload switches are so important. If you unplug a humidifier, or refrigerator, and plug it back in, you’ll hear the motor hum, the switch trip, the motor hum, the switch trip, etc, until the pressures have equalized. Compressors can maintain their momentum, under pressure. Once you’ve removed that momentum, they don’t have enough torque, to start again, against the ‘running’ pressure.
I hope that I explained that clearly. I’m more of a ‘give me a pencil and paper’ kind of teacher.
@@Willam_J Oh yeah I see now thanks for that,, now you say I remember some experience of this, years ago I had a large dehumidifier and the digital controller for that had a setting for setting and adjusting restart delay to prevent compressor from stall damage.. Thanks again for taking the time to explain :) Happy new year Steve
my compressor never stop running and get very very very hot...Do you thing that overload relay could be the problem. (for my wine fridge). The compressor, running and i have cold inside it. Thx
Make sure all the coils are vacuumed clean.
@@electronicsNmore ok thx for your quick answer. but i cannot have acces to the coils. i have a sanyo sr-w4500(m). impossoblie to get acces inside the unit. sound weird i know. but it is impossible to get acces. maybe the overlaod relay ???
Larger 3 phase motors have no internal or any attached devices (like in this video) for thermal overload protection. They rely on externaly, remotely installed thermal overload devices as well as current limiting devices, usually located at the motor control center. Usually a 3 phase motor would have 3 fuses and a thermal overload block located directly under the starter block. Obviously, the thermal overload units have no direct contact with the motor, therefore they must be selected and sized based on the individual motor's current rating.
These devices are mandatory for each motor installation. Fuses alone will only protect the motor if there is a short in the motor or the wiring. In most cases, fuses alone will not protect a motor from damage caused by overheating.
Correct. I've seen those before. My buddy owned a scrap metal business and had them. Thanks for watching! Be sure to share.
I did exactly the same thing with my heat gun and the circuit never opened this mean the overload protector is bad ?
Maybe not enough heat.
motor runs for 2 minutes shuts down for 5 minutes , looks like their is a sensor attached to the motor windings , could it of gone bad ? only have about 20 hours on it
If it has a run capacitor, make sure it's good(the correct value). Also make sure the voltage input is correct. It's possible the windings are faulty.
@@electronicsNmore thanks for the advice
My problem is my sons wife left the pool pump running for three days and now I can't get the motor to run checked and found timer bad and replaced. I have power to motor and motor spins freely but don't know what to do now maybe needs a new motor????
czcams.com/video/r30uuAF-U90/video.html
My reset button (air compressor) stays down and doesn't pop up to be pushed down again?
If everything cooled down, then the button is faulty.
Anyone know where I can get a 2 wire 70°c max thermal protection switch for a air vent attic fan motor. I called manufacturer and told them motor was fine that all I needed was that switch and they said they only sell replacement motors not the parts to them, of course they don't why would they want the consumer to save money
This type also works, as long as you don't exceed 10A or 70c.
amzn.to/2yUXzd2
(Amazon Affiliate Link)
@@electronicsNmore thanks just saw ur message and went ahead and ordered what u suggested
Please make my day or not I left my pool filter without water for less than a minute after I turned it off it turns on for a second then turns off what should I do ?
Oh so it's a thermal switch.
Pretty much, but also has a heater.
The adjust made no since
They're very cheap, llike $2 to make, will fail quickly such as low freon causing compressor motor overheat. I wish they'd spend a few more $ to put a proper thermal relay to cut pwr.