Great video! just remember if your readings are on a cold motor it’s going to get worse when it’s under load or hot. Heat expanding the insulation giving you lower M-ohms.
@Jordy40Growing
2 жыл бұрын
Thanks for video. I think you did the most basic but best way of understanding the megging of a motor.
@TheWpruden
2 жыл бұрын
Thanks for posting and keeping it simple. Are you an electrician or hvac Technician? I have the fluke 1520 and you see very few hvac guys with megommeter. I'm hvac Technician myself. Those tradesmen that work on motors will eventually have a misdiagnosis when checking for a short; especially on outdoor motors. Thanks again.
@wtfman5313
2 жыл бұрын
@@TheWpruden I've been an Electrician and HVAC Tech. In the last 20 years I've focused completely on HVAC. The MegOhmer is critical if you do commercial refrigeration. They're worth their weight in gold.
@guardianmn
2 ай бұрын
Came across these motors often. Engineers recommended enclosed motors to prevent moisture from entering the winding. Thank you for your educational support
@dubsaloon
2 жыл бұрын
Wonderful Instruction. Thank you.
@wtfman5313
2 жыл бұрын
Thank you for taking the time to watch!
@HVACRVIDEOS
2 жыл бұрын
Great video bud!
@wtfman5313
2 жыл бұрын
Thanks man!
@tecnisdaimondm.g9321
7 ай бұрын
Excelente
@kuryenteofficialvlogs6133
2 жыл бұрын
Thanks for sharing New
@abrhamgonzalez6582
2 жыл бұрын
Thank you for the video. Can you make More video of this kind. Helps seeing other people trouble shooting equipment in different situations. Thank you.
@wtfman5313
2 жыл бұрын
I plan on lots more content in the Spring. I will do a video on the Fluke 1507 and how to use it to reestablish a VFD that has been in storage and some more motor tests. Thanks for watching!
@allenquintana2868
Ай бұрын
You rock my dude 😎🤘
@wtfman5313
Ай бұрын
Right back at ya!
@anthonyrivera4797
4 ай бұрын
What reading would you get if you megger between the windings if the motor is bad? ( T1 to T2 ) ..etc
@dodznb238
2 жыл бұрын
Hello my dear new friend your a good electrician.. watching from philippines...👇👇👇👇👇🤝🙏🏼
@wtfman5313
2 жыл бұрын
Thank you! I have more coming in the Spring so stay tuned.
@JohnnyJr396
Жыл бұрын
I guess it depends on the motor manufacture but what values do you consider good? Some say they’re looking for 20-40. over 40 great but start getting concerned around 20. Thanks
@IWasNoah
2 ай бұрын
only has to be above 1M ohm in australia depends on standards
@iceinyourveins-rn7em
Жыл бұрын
I had the same issue with a motor that was controlled by a VFD. It would start up and run for a few seconds then when it would get up to maybe 70 percent of the actually full load RPM’s it would trip the VFD. I’m gonna go out on a limb and say after you swapped out the motor the problem was fixed or did you still have issues with the VFD as well?
@wtfman5313
Жыл бұрын
The problem was fixed. The new motor has run without issue since that day. Install of the new motor was the same day.
@iceinyourveins-rn7em
Жыл бұрын
@@wtfman5313 Good to know! Thank you for the video and keep up the good work brotha!
@jonwesley173
2 жыл бұрын
Great video. Its nice to see it done instead of just reading about it. Did you rewind it afterwards or replace it?
@wtfman5313
2 жыл бұрын
We wound up replacing it. The Baldor rolled steel motors aren't worth the cost to rewind.
@TheCompton1963
8 ай бұрын
I want to learn how to do this. 😕
@bobbauvian7700
22 күн бұрын
could it be contaminated inside with dirt and dust, Possibly conductive dust.
@davezz19
2 жыл бұрын
How did you get on with the over all issue?. Was the drive faulty?
@wtfman5313
2 жыл бұрын
The drive was good. Just a bad motor.
@Jorge_pdll
10 ай бұрын
Hello thanks for the info! I noticed that you have a over voltage fault on your drive is that correct? Is so, what was the solution for that? I have the same problem! Thank you!
@wtfman5313
10 ай бұрын
The problem will be with your drive or less likely, main power feed to the drive. I will eventually post a vid on how to find out.
@Jorge_pdll
10 ай бұрын
Yes please i have that over voltage problem for a few days and is driving me crazy! The motor it was grounded so i will replace that in this next days and see from there if i can do something with that fault! Thanks
@teggie6853
2 жыл бұрын
Don't know if this is appropriate, but can you name the manufacturer of the air handler? I ask because it looks like a des champs/munters. They also have narrow access doors on some models.
@wtfman5313
2 жыл бұрын
It’s a 150Ton “Seasons 4” chilled water AHU. I believe they’re made in Atlanta, Ga.
@teggie6853
2 жыл бұрын
@@wtfman5313 Thanks friend. I had a 60 hp go out a bit ago on a munters unit. Ridiculous the things these manufacturers squeeze into some those units.
@jeroneumali8787
2 жыл бұрын
Meaning0 the set range of the actual value must be high higher to idenity if it good or bad?
@wtfman5313
2 жыл бұрын
Nope, not so. Not according to FLuke.
@justinlucas7
Жыл бұрын
What would have been a good reading? If the motor was fine
@wtfman5313
Жыл бұрын
> 500 Meg Ohm @ the 500V setting for a 480V motor.
@jersmith1486
Жыл бұрын
did you disconnect the leads at the VFD? wouldn't that fry the drive if you didn't?
@wtfman5313
Жыл бұрын
Yes, the leads were disconnected from the output contactor. No harm would come to the drive as long as the contactor is open - which it is when there is no command for it or the drive is powered off.
@jersmith1486
Жыл бұрын
@WTF Man! ok good thanks I'm just learning this stuff I think I was confusing it with ohming. So you're checking the insulation of the wires up to the open contacter. I've only done it directly to the motor and I have heard of a drive being smoked this way but the contactor must have been closed.
@bullishbear2686
Жыл бұрын
What kind of VFD? Danfoss i suppose
@Nitrotrician81
2 жыл бұрын
How do you know what value to set the megger to?
@wtfman5313
2 жыл бұрын
By the voltage that is supplied to the motor. In this instance, the motor is a 480 Volt motor so I selected 500V. Any thing over 575 V you would use 1000V.
@Nitrotrician81
2 жыл бұрын
@@wtfman5313 gotcha thank you!
@jeremyvigier8853
2 жыл бұрын
Do you leave the wires terminated on the VFD when testing?
@wtfman5313
2 жыл бұрын
Yes. The wires were not connected at the VFD or the motor. They're completely isolated for testing.
@insane1899
10 ай бұрын
Is that to check if you have a break in the wires leading to the vfd? but the ground was connected to the vfd to complete the circuit?
@emiliohuerta2658
20 күн бұрын
I'm also wondering the same here
@4Tiburon
Жыл бұрын
I did this exact test same meter and got nothing 0 on all 3 legs? Motor was definitely fried smelled it when I removed the pecker head. But what does it mean with 0 on all 3?
@wtfman5313
Жыл бұрын
It’s shorted to something internally in the motor causing 0 ohms of resistance - which is a short circuit. All legs are touching the case.
@chefeatsher
Жыл бұрын
Have u ever seen a motor running while also having resistance to ground ? I found one with 4 ohms to ground on T1/T2/T3
@kevin00861
11 ай бұрын
yeah, ive also seen one, what i think is that the current leaked to the ground is not high enough to trip the MCB or trigger the VFD short circuit
@AB-yu2tj
2 жыл бұрын
Can this identify turn to turn faults?
@wtfman5313
2 жыл бұрын
Yes as long as you use the multimeter function of the meter. Any windings shorted together would read zero resistance and you'd get a resistance value between the shorted windings and the un-shorted winding.
@oscar27ization
2 жыл бұрын
Whe do u test for more than 500mega ohms and 100 mega ohms
@wtfman5313
2 жыл бұрын
Rephrase your question. I'm not sure what you're asking?
@oscar27ization
2 жыл бұрын
How come you chose to test the motor at 500MO? And did u test every single phase lead of the motor? Thank u
@ZZ3CR
Жыл бұрын
@@oscar27ization he tested it at 500 volts and the meter indicated the resistance was 500 MO
@iceinyourveins-rn7em
Жыл бұрын
500 volts not mega ohms. The ideal reading for a 3 phase 480 volt motor that is good would give you a reading of greater than 550 mega ohms on each of the 3 wires at 500 volts.
@tfun101
2 жыл бұрын
So a high ohm reading on the feeder wires means the wires are good? And a low reading would mean it shorted or something? What does it mean when there’s a low reading like that for the motor wires?
@wtfman5313
2 жыл бұрын
You want to ideally read infinite when reading your windings, leads or current carrying device. Shorts will give you a very low reading such as .1 or 0 ohms. There are a few exceptions though, but they apply to electronic devices mostly. You are correct.
@IWasNoah
2 ай бұрын
this video made me lose braincells
@stevebramlett4311
2 ай бұрын
I’m looking for a new meter, I do industrial maintenance. I interact mostly with 3 phase motors 30hp and smaller. I have always seen the value in a megger but none of the shops I’ve worked in have them. Considering the 1587 as it should have all the features of an 87v or plus able to meg out motors. Would I be able to test these motors reliably or do you need a dedicated megger?
@wtfman5313
2 ай бұрын
Typically, a Fluke 87 or equivalent (I use the 179) would be fine to diagnose a faulted motor. Example: testing a winding to it's case or a ground may blip your screen very briefly then show infinity again. That is a motor with failing windings. The 1587 is to test the winding insulation and should be part of an annual maintenance action or to verify whether a motor is causing a VFD or other current monitoring device to show a fault due to leakage to ground. Other than that a regular Fluke model volt / ohm meter is what I usually go to.
@JeremiahL
2 жыл бұрын
Its a balder motor... Of course it's good...
@wtfman5313
2 жыл бұрын
Hehe... I have replaced so many Baldor's over nearly 40 years! The shaft bearing seals bleed and grease gets into the gap between the rotor and stator and creates a path... If you look at that motor case, you'll see what I mean.
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