Thank you for a great video. I have a challenge on hand I would appreciate your assistance. In resetting the the contactor from the overload state, must the machine be connected to mains power while the reset button is pressed and then the ON button pressed? I am terrified of making an mistake and causing destroying the machine. Many thanks in advance and once again for the training.
Your e-motor FLA is 22A, so OCR should be set to 22A (+ temperature compensation coefficient if OCR is located in overheated enclosure with temperature over 40deg C).
As every motor load is different the overload protection relay should have a current as well as a time setting. For example, one can have a load which has a high inertia and for that one needs a longer time setting. Or one can have a motor, which starts on a light load ( e.g. an unloaded conveyor belt) which needs a shorter time. Hence every overload should be tuned for the type of load. This can only be done with a current and time settings, hence with electronic overloads. A number of companies make such overload relays, unfortunately Eaton did not have this facility included in their newest electronic relays. back to the drawing board!
It makes not much sense, 'cause main purpose of OCR is to protect a motor against an overload, not only to indicate that overload exists. however yes you can. NO contact 97-98 should be wired to PLC input.
Fantastic video, extremely concise and well explained.
Congrats to everyone involved in this! :)
Awesome, just awesome!
Thank you for this.
Thank you for a great video.
I have a challenge on hand I would appreciate your assistance.
In resetting the the contactor from the overload state, must the machine be connected to mains power while the reset button is pressed and then the ON button pressed?
I am terrified of making an mistake and causing destroying the machine.
Many thanks in advance and once again for the training.
Hi, I like your video. Thanks
thanks.. this really helps me to understand the basics of OLR.
Awesome sir, do many videos
I have a 15 hp motor rated 22 amps.
How much current i have to adjust on thermal contact dial?
Your e-motor FLA is 22A, so OCR should be set to 22A (+ temperature compensation coefficient if OCR is located in overheated enclosure with temperature over 40deg C).
Very good description
amazing video, thanks
Thanks Sir
Thank you for this!
As every motor load is different the overload protection relay should have a current as well as a time setting. For example, one can have a load which has a high inertia and for that one needs a longer time setting. Or one can have a motor, which starts on a light load ( e.g. an unloaded conveyor belt) which needs a shorter time. Hence every overload should be tuned for the type of load. This can only be done with a current and time settings, hence with electronic overloads. A number of companies make such overload relays, unfortunately Eaton did not have this facility included in their newest electronic relays. back to the drawing board!
Each OCR is defined with Trip class (most common for industry are 10 and 20). It is exactly what relates to time needed to trip a motor.
Thank you
Can we set overload relay as alarm only?
It makes not much sense, 'cause main purpose of OCR is to protect a motor against an overload, not only to indicate that overload exists. however yes you can. NO contact 97-98 should be wired to PLC input.
I love you