Dual Voltage and Part Start 3-Phase Motors

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Don't get overwhelmed with 3-Phase! It's not that complicated! Bryan is back with more of his knowledge this time on Dual Voltage and Part Start 3-Phase Motors.

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A clear and concise explanation with great diagrams. Thanks, I needed that!

Straycurrent

Learned all of this years ago when learning industrial electronics in college but realized I’ve forgotten lots even bits of it helps greatly doing commercial hvacr. Great descriptions and wiring diagrams!! I retain knowledge much better by seeing than hearing.

jphvac

Thank you so much for this great illustration

الحمدلله-حقذ

A lot of big stuff around my facility that I don't have to touch but have always been curious about.

davejohnsonnola

Thats funny you put out this video. Just ran into a similar situation on Friday. Blower was bad. Customer needed the system back up and running quickly. OEM motor was 2 weeks out. I found a motor at a local electric shop. It was virtually the same 1750 rpm vs 1725. 3 hp vs 2.9. 8.9 amps vs 8.6. It was a duel voltage motor. It is easy to swap the leads around to change it up. Installed it and checked amp draw. I was at 6.9 amps. Customer was happy to have their only system back up and running. He even signed up for our maintenance program

jasonjohnsonHVAC

Pardon my ignorace but what whould happen if i apply high voltage on low voltaje configuration or vice versa ?

kennethrivera

I have a GE sever duty 15 hp 3ph motor wired 9-5-11-L3 4-8-10-L2 6-7-12-L1 runs at 900 rpm (It is supposed to run at 3510) Do I have it wired wrong

mackeverhart

Thanks for the video! Would love to see a detailed video on Delta Phase supply voltage and equipment. :-)

RJMaker

Some old trane rtaa chiller compressor use part winding starter.

Noypihvac

What will happen if I wire it 10-4 together, 11-5 together, 12-6 together 7-1 to L1 8-2 L2 9-3 L3 ? Can somebody help?

mackeverhart

Seen more Y start Delta run configurations than part start ones

mdroid

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