Calculating Motor Overloads

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This video walks through the steps to calculate the maximum overload setting for an individual motor using the 2015 Canadian Electrical Code. This is not an installation guide, and local inspection authorities should always be consulted.
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Опубликовано:

4 окт 2024

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Комментарии : 76

@dwaynecampbell9093 4 года назад

Over ten years in the industry and your video just cleared many unanswered questions. I like your method of explaining. thank you.

@schulerruler 4 года назад

Thank you for the encouraging words!

@anthonymartinez8347 2 года назад

Same here, my boss tried to explain,, but just learned in 5 minutes here👍

@schulerruler 2 года назад

I'm happy it helped!

@toumistra 5 лет назад

Appreciate the refresh. All journeymen/women should take some time to review their knowledge base. The field is so diverse and its easy to get stuck doing the same things for a while, which leads to important aspects being forgotten. Congrats on the channel.

@schulerruler 5 лет назад

Couldn't agree more. Thanks for watching and commenting!

@roseandmose 2 года назад

I don’t know where will I need this info but you are a good teacher sir 😀

@angusandleigh 3 года назад

...Excellent video, I've been trying to explain this simply for my road techs...this is the BEST explanation I've found....Cheers man.

@michealgoudarzi6893 2 месяца назад

How amazing way to teach, Thank you.

@thecartoongirl22 5 лет назад

This was SO helpful for the program I am doing! Thanks for the great class!

@schulerruler 5 лет назад

Happy it helped! Thanks for watching.

@rg16315 4 года назад

Yeah right. Thanks for making video like this. The details and the information are so clear.👍

@williansousa3820 5 лет назад

Great class! Thank you. It helped me a lot for preparing to take my challenge exam.

@schulerruler 5 лет назад

Happy it helped. Thanks for watching and commenting!

@Mahle-f2b 2 месяца назад

Thank you very much for sharing with us.

@nogarats 5 лет назад

Great class, very good explanation and well paused. appreciated !

@schulerruler 5 лет назад

Thank you for watching and commenting!

@rg16315 4 года назад

You teach so well. I'll try to support through views and likes. Thanks for making informative videos likr this. 👏😃

@keithnf1 3 года назад

You are the man! Love all the videos!

@schulerruler 3 года назад

Haha thank you for the support!

@revertedakhi Год назад

Excellent explanation! Your explanation is clearer than my future JK hehe nice video.

@trevorrichardson7582 4 года назад

wait, how the hell can you write backwards so flawlessly

@ahmedsamy3509 3 года назад

It is a mirror tool by any editing program

@matthew17macpherson 2 года назад

Studying to challenge my third block and these videos are so helpful. If you have any tips for third year code, I would be beyond grateful. Thanks for doing these!

@wernervonbraun5385 4 года назад

AMAZING BOARD!

@sohailjanjua123 Год назад

Hi , I like your video. Thanks

@schulerruler Год назад

Thanks for watching!

@AhmedRagab-nd2hn 5 лет назад

excellent.thank you

@schulerruler 5 лет назад

Thank you for watching and commenting!

@RizwanKhan_99 3 года назад

Great vid. Can u explain difference between HOT state and COLD state of a thermal overload relay, thanx

@muzammilahmed2517 2 года назад

Hello Sir Thanks for your videos, found really helpful. I need electrical codes book ?

@bfg1805 11 месяцев назад

you should do welders section 42 calculations in there

@brentbarnhart5827 6 месяцев назад

I'm trying to calculate an ISO or German motor with a cosine of 0,95 ~ My understanding is that "european" motors are basically at factors of 1 on down to 0.85 or so which isn't very efficient. So if the motorplate says AMPS at 3.4 ~ with a cosin of 0.95 I would set my overload "at basically" 3.4 Amps IS THIS CORRECT?

@Honhjun365 11 месяцев назад

Is CEC table D16 used for sizing CB?

@thekhang5098 2 года назад

Why Y/ ∆ start using phase current , while other motor using line current ( FLA )???

@nadirgabir3012 4 года назад

If I have A 30 HP, 600 V, 3 Phase squirrel cage motor feed from autotransformer and is controlled by a Star-Delta starter. What is the maximum size inverse time circuit breaker allowed to protect the circuit. Is it based on phase current like the above video showing?

@karimeldaly1007 3 года назад

@schulerruler Hi. In case of Y/delta motor, the overload relay will be installed after the main contactor?

@lashlyismail1070 3 года назад

Thanks , please mention the reference of this data

@rajavenkat5594 4 года назад

thank you

@javierpuerta8074 5 лет назад

good class

@schulerruler 5 лет назад

Thank you! And thanks for watching.

@trentonreisinger6285 Год назад

Shouldnt your 26 A motor have FLA x 1.15 if your s.f. is less than 1.15? Not 1.25

@schulerruler Год назад

The service factor written under the 26A FLA motor is 1.3 which would permit the overloads to have a maximum to seeing of 26 x 1.25.

@intheskymusic 5 лет назад

Also, where's your grounding/bonding video. ?

@schulerruler 5 лет назад

That's a looooong story. As code has changed on the connection of the grounding conductor, I will be filming a similar video reflecting new code soon. Thanks for the interest.

@wernervonbraun5385 4 года назад

BRAVISSIMO!

@m.irzath964 Месяц назад

motor will run in star (Y) current only but why ur selecting over load relay for delta connection

@schulerruler Месяц назад

Because the Delta current is the full load current of the motor. When selecting the overload settings however, you must start with 57.7% of the FLA before application of 28-306 1).

@roseandmose 2 года назад

Can you suggest some sources me to learn basic of these terms

@alipbayragi3737 3 года назад

How to calculate the main circuit breaker for this four branch Motors?

@schulerruler 3 года назад

Check out my other video that does exactly that! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Z6scKF_sH8s.html

@surujzaman2294 6 дней назад

Sir, good day, I need VFD inverter parameter setting, please halp me,

@mashungu8289 2 года назад

I HAVE A SINGLE PHASE MOTOR 1,5KW,9,5A MAX,WHAT SIZE OVERLOAD?

@schulerruler 2 года назад

Check your service factor. If it is more than 115%, your overload is permitted to be rated at not more than 125% of 9.5A. If service factor is unmarked, or 115% or less, then it is not to exceed 9.5A x 1.15.

@eddiecasaul620 Год назад

How should I compute the min overload settings then?

@schulerruler 8 месяцев назад

Minimum would be equal to the FLA of the motor, but you would likely see a lot of nuisance tripping setting it that low.

@mictone1 2 года назад

May I know what the 0.577 is?

@schulerruler 2 года назад

It correlates to the 57.7% that the phase current is in relation to the line current. As the overloads only see the phase current we must use 57.7% of line current to size them or the motor could significantly overdraw in an overload condition.

@PHealey1981 4 года назад

How can you write backwards so impressively fast?

@schulerruler 4 года назад

I wish I could say I'm just that good! I am writing normally, but the camera inverts the image 180°. Magic ruined haha.

@aymnslah7096 5 лет назад

think you

@Chaisoda 3 года назад

Why you not use RLA for calculate?

@schulerruler 3 года назад

Because calculations are based on the motor operating at full load. Anything less would undersize components and conductors once more runs at full load capacity.

@Chaisoda 3 года назад

@@schulerruler Thank you. One more, for a compressor, what we should use RLA or FLA?

@SajidKhan-rx6iw 3 года назад

22kw motor selection of thermal overload relay range

@michukineke3059 Год назад

👌

@MsAmitis 4 года назад

What kind of board is this?

@schulerruler 4 года назад

It's called a light board. Essentially a pane of tempered glass with LED strips around the outside pointing in. It really makes fluorescent dry erase and chalk marker colours pop on the board.

@MsAmitis 4 года назад

@@schulerruler It looks amazing and so easy to read! Great work :)

@schulerruler 4 года назад

@@MsAmitis I wish I could take credit for the build but that goes to an amazing tech Dept!

@intheskymusic 5 лет назад

Please Check your volume output its too low..

@crosslolo7245 4 года назад

Why wouldn't he finish😳

@schulerruler 4 года назад

Finish what, sorry?

@crosslolo7245 4 года назад

I was believing you would finish with the breaker size

@schulerruler 4 года назад

Overcurrent sizing is done in a separate video, to keep things one step at a time for simplicity. The overcurrent would be a completely separate calculation that does not require sizing of the conductor. I'm happy to help clarify any confusion, thanks for watching.