HOW TO TEST AN OVERLOAD RELAY
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- čas přidán 4. 05. 2020
- Hello viewers and welcome to Synectum. In this video I show you how to test your overload relay for proper working conditions. I use a fluke multimeter to carry out all the checks and outlined the necessary steps and required results. Thank you for watching and I hope you find it informative. Links below are for related videos. Please like, share and subscribe and remeber to leave a comment.
What is an overload:
• INTRODUCTION TO OVERLO...
How to test a contactor:
• HOW TO TEST A CONTACTOR
Thank you!!! - Jak na to + styl
Wow, everything I needed to know quickly. Thanks brother!
You are welcome bro. Happy I could help.
Great video! Short and easy to understand.
Thank you Sanchez.
Short and simple and good information.
Thank you for the positive feedback. More great content coming soon.
Thank you very informational and straight to the point
You're welcome! Thank you.
Nice and simple. Thanks for sharing.
You're welcome...
Nice lesson
You the best. Thanks!
Thank you!
Very clear , well done
Thanks for the feedback.
Well explained thank you.
Thank you for the feedback Liam. You are welcome.
Great video. Thanks
You're welcome.
very informative and helpful
Thank you for your feedback.
Thank you very much.
Very educating.
Thank you for the feedback.
Thanks for the video, liked and subscribed. 🙂
Thank you so much.
that really help me with lathe machine. thank bro.
You're welcome.
What I like with these videos is that there’s no faff. Just telling us what the crack is
Thanks for the feedback. I try to get to the point as fast as possible.
Very informative video
Thank you for the positive feedback.
thanks for the video
You're welcome.
Good tutorial Teacha.
Really appreciate the feedback.
Great explanation
Thank you
Good video
Thank you for your feedback!
That Easy to Understand
Thanks for the feedback.
Sounds like a Jamaican. Good video breda
Yea mon Jamaican. Much respect.
Thanks for this informative video. Can you tell me if a relay like this can be used to protect a single phase 220v motor from overheating?
Thank you for the feedback. Any motor being controlled it is recommended to use an overload for protection. If your motor is overheating it is probably overworked ( having too big of a load). While this overload will protect you from over current which is a common factor for overheating, you might want to upsize you motor to match the load it is connected to.
@@synectum640 Thanks for your fast reply. It's not that I'm having a problem with overheating but I want to prevent any potential overheating problems. I have assembled a diy meat grinder and only use it for meat but I want to grind bones as well. I've only recently learned about overload protection and want to protect the motor in the event that it gets stuck on a hard bone.
If It's not a problem for you can you recommend a suitable overload relay for my current set up? The motor is 2.2KW 220V.
What is the FLA on the nameplate of the motor? Should be around 10 -13 amps.
Eaton XT series electronic overload relay, 4-20 A adjustable. Model type XTOE020CCSS.
The motor says 2.2 kw 220v and 7.5 A All of the words are in Chinese so I'm not sure if the FLA is 7.5 A. As for implementing overload protection this might be a dumb question but how do the connections go? Will it just be as simple as running the power source for the motor to L1 and L2 and then connecting T1 and T2 to the motor?
Sorry for my English, I'm Indonesian.
Is it possible that Thermal Overload Relay not tripped above the set point after determined time achieve?
Like: Set 50A, Class 10. The current condition is already above 50A - let say 60A, for more than 20 seconds, and the Relay still not tripped.
What part of the Thermal Overload Relay is broken?
First off for any thermal overload malfunction I would advise you to check the wiring first. Ensure your NC contact is wired in properly to break the circuit in a tripped state. Another failure point is the thermal bi metallic strip. Based on your question however in order to properly set and size the adjustable class 10 overload you must first get your FLA rating from your motor nameplate and use your 125% x FLA if you have a SF of 1.15 to get your max load current. With those values you can properly determine if your overload should have tripped based on your calculations. If possible state the voltage level, FLA, SF, and also the model overload you are using so we can carefully diagnose. Thank you.
Good video. Nice glove. Do you have a link for them?
Thank you. It's called microflex onyx. Many different suppliers for them online.
Great video sir. Does it mean that, even if power flows through the o/l relay, the overload's nc and no only change states in one condition; when the overload relay trips?
That is correct.
@@synectum640 thanks sir!
Very good
Thank you.
Do more videos 📹 please
So what I understand is that the NC contact (terminal 95 & 96) will break open during an overload... However, will there be continuity between terminal L3 & T3 when an overload occurs?
Yes that is correct. 95 - 95 would be wired in series with coil wiring of the contactor supplying the 3phase power. When it trips it opens the coil circuit, deenergizes the contactor and opens the line to load contacts which prevents current from flowing to the overload terminals IDEALLY.
@@synectum640 Thank you for the confirmation and for the great video!
You're welcome and thanks for the feedback.
My motor is on all and won’t shut off when it supposed to would this be a solution ?
I belive you have a controls issue. You on/off or start/stop seems to be not working and hence keeping your contactor closed. I would start there and work my way down. Thank you.
So if power is applied do you have 0 volts on your NC and 24 volts on your NO then if it does trip, will you have 24 on your NC breaking it and 0 on your NO? Or am I wrong
You usually only wire your hot going through your NC contact so it depends on where your reference is that determines the voltage read at your NC contact. If your measuring across the NC and NO contacts then yes. The coil if it is a magnetic or electronic will also affect these readings for your NC contacts.
What is that stop button for ?
Good day. It is used to manually open the N/C contact on the overload.
What is the red stop button for ? Is it the same thing as the test
Yes it initiates a tripped condition.
@@synectum640 thanks
I have continuity when power is on but not when power is off I have 3 of these in a row and the least one doesn’t have contenty when it’s on or off
Seems you might have a tripped OL. Remove power from circuit, reset and test for continuity. If you do, check circuit for a potential short.
Connectivity test is good but how are we going to test that whether the relay tripping coil really works when an overload current pass through it.
The most you can do are the test outlined in the video. Only additional test is to actually supply the overloaded current to see if it trips (I WOULD NOT ADVISE THIS).
I have question why L1 and T1 reads OL, also L2 and T2 reads OL but why L3 and T3 is shorted. I don't understand
Good day. For an overload there should always be continuity between ( L1 - T1) , ( L2- T2) and (L3 - T3) in a normal operating overload device. In my example we experienced "OL" conditions between our first two line to load contact legs hence why that overload was a damaged one. NOTE : It's different from a contactor where you'd usually have an OL condition between your line and load terminals until the coil is energized.
@@synectum640 Thank you and I now got it. :)
You're welcome. Happy to help.
So this is a faulty overload relay.😊
Yes, it is. From my scrap pile.
@@synectum640 ok, Sir. Any possibility of opening it and try for repair?
For reliability issues I wouldn't. Being such an important safety device, I would replace.
@@synectum640Right, Sir. 😊
Walter?
If you're asking if I am Walter, then no.