What is an Overload Relay? Connection & Working Principle

Рет қаралды 88,866

Күн бұрын

🎥 If you are curious to know what an overload relay is, what an overload relay consists of, how an overload relay is coupled into a contactor to protect a motor, what differences it has with a circuit breaker, and how to test an overload relay to check if it is functioning, watch this video until the end.
By watching this video, you’ll get the answer to these questions:
- What is a motor starter?
- What is motor overload?
- What is an overload relay?
- How to test an overload relay?
- How to wire an overload relay?
- What causes overload current?
- How does an overload relay work?
- What are the components of an overload relay?
- How to connect an overload relay to a contactor?
- What is the difference between a circuit breaker and an overload relay?
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💬 Video Summary:
What is Motor Overload
- If a motor draws too much current and generates too much heat, it indicates running in overload. So, to protect products in industrial automation, an overload relay is used to attach to a contactor to prevent motors from operating in overload.
Overload Relay Operation
- Once the overload relay detects an ongoing overload condition for a considerable time, it will trip and send feedback to the contactor, so the contactor breaks up the current flow and stops the motor.
Motor Overload Causes
- When a rotor gets jammed, and there is a mechanical obstruction.
- When the process of aligning shafts with each other is not properly executed.
- When the ambient temperature is high, and there is inadequate ventilation.
- When a motor is undersized to handle a load which causes additional stress on a motor, and
- When bearings, responsible for supporting the shaft inside a motor, have been damaged.
Parts of an Overload Relay
- Adjustable current setting: By using this dial, you can specify the amount of current the motor must draw to be considered overloaded. In other words, the motor's rated FLA or Full Load Amps can be set here.
- Built-in auxiliary contacts: A pair numbered 95 to 96 is normally closed, whereas a pair numbered 97 to 98 is normally open.
- Reset button: This design allows you to toggle between manual and automatic reset modes and functions as the reset button.
- Test trip button: It may be utilized to simulate a trip off the overload relay to check if the overload relay is working correctly.
- Trip indicator: provides the status of the overload relay visually. Meaning, when an overload condition happens, this indicator turns on.
Difference between Overload Relay and Circuit Breaker
- Using a circuit breaker, you can protect a motor from sudden high-current events caused by a short circuit.
- On the other side, an overload relay protects a motor from the excessive current being drawn from the supply.
Overload Relay and Contactor Connection
An overload relay cannot be used to operate a motor on its own, so you need to pair it with a contactor. Typically, an overload relay is positioned beneath a contactor, often having three prongs extend outside its housing coupled into the contactor load side terminals.
Overload Relay Testing Procedure
Finally, we will show how to test the overload relay using a multimeter set to the Continuity Beeper.
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⏰ TABLE OF CONTENTS ⏰
00:00 Motor Overload Explained
00:52 Overload Relay Working Principle
01:22 Motor Overload Causes
02:02 Overload Relay Components
03:35 Overload Relay vs Circuit Breaker
04:34 Overload Relay Connection With Contactor
05:14 Overload Relay Wiring Diagram
06:46 Overload Relay Testing
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#Automatedo #relay #overload

Пікірлер: 70

@Automatedo Жыл бұрын

We hope you enjoy the content. With your support, we can bring you more informative and engaging videos on the topics you love. Your contributions make a real difference and help us grow the community of industrial automation experts. Together, we can create something truly special. Thank you for being a part of this journey! Cheers 🍹ko-fi.com/automatedo

@WillHead-SchneiderElectric 4 ай бұрын

1:22 really helped me to understand the difference between a Circuit Breaker and an Overload Relay.

@MaximumUtmost 10 ай бұрын

i highly recommend watching this with captions on, because the captions are perfect. this video is extremely helpful.

@Automatedo 10 ай бұрын

Thank you so much for your feedback! 🙌 We are thrilled to hear that you found the captions perfect and the video extremely helpful. Your recommendation means a lot to us! 😊 If you have any friends or colleagues who would benefit from the content, we would appreciate it if you could introduce them to the channel and encourage them to subscribe. 🌟🎉 Your support helps us continue creating helpful videos. Thank you again, and we hope to provide more valuable content in the future! 🙏🔥💪

@KirillXYZ 7 күн бұрын

Wow, very helpful video. Thanks

@marcos186cy Жыл бұрын

Very well explained video! Fantastic animations as well!

@Automatedo Жыл бұрын

So sweet of you. We glad to have audiences like you 🤗

@giyasuddinansary5332 6 күн бұрын

Very good videos

@archaeopteryx7405 7 ай бұрын

This video is fantastic. Really instructive. Thank you.

@igochedavidugbabe2742 Жыл бұрын

this was very straightforward and easy to understand

@Automatedo Жыл бұрын

Thank you for the positive feedback! We are glad you found the video straightforward and easy to understand. Our goal is always to make our content accessible and helpful to as many people as possible, so it's great to hear that it was effective for you. If you have any suggestions or ideas for future videos, please let us know. Thanks again for watching and leaving such a kind comment!

@briangibson6445 6 ай бұрын

Extremely well done! Thank you!!

@jonfenech5840 4 ай бұрын

many thanks for your generous help

@BULLEAD 7 ай бұрын

Easy to understand, good explanation.

@cedricbaba-al6099 5 ай бұрын

Thanks for the explanation I think its very clear and easy to understand.

@ibrahimakkash Ай бұрын

🎉 1000 thank you I just understundom how it works

@Automatedo 8 күн бұрын

🎉🎉 That's awesome! So glad you understand how it works now! 👍💡 Keep up the great work! 💪✨

@mkamiwambura9268 6 ай бұрын

I typically Enjoyed the lesson

@katuraysalad Жыл бұрын

Thank you for this great video

@Automatedo 11 ай бұрын

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@samrahimi7521 5 ай бұрын

خسته نباشى ممنون

@argentey5799 7 ай бұрын

Thank you👏👏👏

@ashokrane6199 Жыл бұрын

Very nicely explained. Thanks a lot

@Automatedo Жыл бұрын

Thank you for taking the time to watch our video and leaving such a positive comment! We are thrilled to hear that you found it helpful. If you have any further questions or suggestions for future videos, please don't hesitate to let us know. 😉

@sambathbunkh 6 ай бұрын

Best explanation

@mixme8655 Жыл бұрын

Great video well explained❤

@Automatedo Жыл бұрын

Thank you so much for your kind words and encouragement! It means a lot to us that you found the video informative and well-explained ❤️

@VeilayuthamKrishnan Ай бұрын

Very good explanation and good info tq

@Automatedo 8 күн бұрын

Thanks so much! 😊 I'm glad you found the explanation helpful. If you have any more questions or need further info, feel free to ask! 👍📚

@markrolandmabagos9575 Ай бұрын

Very clear presentation thank you very much

@Automatedo 8 күн бұрын

Thanks so much for the feedback! 😊 I'm glad you found the presentation clear. 👍 If you have any more questions or need further clarification, feel free to ask!

@abubakarddumba9796 Жыл бұрын

Well explained ❤

@Automatedo Жыл бұрын

We are glad you liked the video. We will be grateful if you can introduce this channel to other professionals like you so that together we can grow the community of automation engineers 😉

@jibuvarghese3842 Жыл бұрын

Excellent video

@Automatedo Жыл бұрын

We glad you liked the content. Thanks for watching. 💮

@VeilayuthamKrishnan Ай бұрын

Very good topic tq

@Automatedo 8 күн бұрын

Thanks so much! 😊 Glad you liked the topic! 👍

@mayuramadawalagama4435 10 ай бұрын

Your explanation is very good

@Automatedo 9 ай бұрын

We really appreciate that. If you like out videos, would you mind sharing them with your friends and colleagues? It would really help us grow the channel and reach more people. Thanks again for your support!

@mohamadmohseni-ni6qm Жыл бұрын

Excellent

@Automatedo Жыл бұрын

Thank you so much for your precious support dear Mohammad 😀

@fernandomiguelpazgarcia4239 10 ай бұрын

QUE BUEN VIDEO. CONGRATS

@Automatedo 9 ай бұрын

@user-td7zc1yp4s 10 ай бұрын

great sir, keep on we appreciate

@Automatedo 10 ай бұрын

Thank you so much for your kind words! 🙌 We are glad you found the video great, and we truly appreciate your support. Your encouragement means a lot to us. If you have any friends or colleagues who might also enjoy the content, we would be grateful if you could introduce them to the channel and encourage them to subscribe. Your support helps us continue creating content that you and others appreciate. Thanks again, and we look forward to bringing you more amazing videos! 😊

@tonyp6088 10 ай бұрын

Fantastic and clear explanation. Thank you

@Automatedo 10 ай бұрын

Thank you so much for your kind words! We are thrilled that you found the explanation fantastic and clear. Your appreciation means a lot to us! 😊 We are grateful for your support, and if you have any friends or colleagues who might benefit from the content, we would be honored if you could introduce them to the channel and encourage them to subscribe. Your recommendation helps the channel grow, and we truly appreciate it. Thank you again, and stay tuned for more fantastic videos!

@sudhirpatil3434 10 ай бұрын

Nice!👍👍

@Automatedo 10 ай бұрын

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@soleilsoleil8287 Жыл бұрын

Great ....

@Automatedo Жыл бұрын

Thank you for your kind words! I'm glad you enjoyed the video. 🙂

@SathishKumar-tc2xs 7 ай бұрын

Great explanation video i never seen any video likes this ,its my gratitude to explain you knowlede to other,thank you. Its my request i want to know What software r u use to explain this video.

@alleninventions8315 Жыл бұрын

Why does the final schematic show the NC of the overload relay connected to L2 in the end instead of A1?

@nawabafridi3962 Жыл бұрын

Great

@Automatedo Жыл бұрын

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@user-xf9bh3vt9s 10 ай бұрын

I get interested i said congratulations Sir

@Automatedo 10 ай бұрын

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@mixme8655 Жыл бұрын

New subscriber sir

@Automatedo Жыл бұрын

Thank you for subscribing and welcome to the channel! We are glad to have you as a part of our community. If you enjoy the content, we would be grateful if you could share it with your friends who might find it helpful or interesting. Your support means a lot to us, and we are looking forward to creating more videos that you'll enjoy!