Omg,,, you’re amazing. Very good explanation you have no idea how big of a help is this video for me. I’m in electrician course and I was a little bit confused but watching part 1 and 2 helped me so much. Thank you thank you thank you HIGLY RECOMMENDED
I am a union electrician and I have not messed with transformers much. Your vids are amazing, very easy to understand! Def going to help on my craft certification test. Thanks!
I posed this question on another of your videos as well: if you are drawing off a primary where the two poles are 120 deg out of phase, what does that do to the frequence and voltage of your output on the secondary?
I have a question. My primary is 480v single phase. Stepping down to 120/240v single phase Why does my low voltage disappear when I hook up the secondary side. But whenever it’s disconnected the low voltage can be read
Is it possible to connect one of the legs on the secondary to ground and get 240v on a single hot line and neutral? and if possible which leg would be the ideal one to connect to ground?
I have a newbie question : For the third option 120/240, is the center tap now neutral and both ends hot? How do I wire this to increase amperage for the 120V (similar to first option)?
I don't know if you read through comment, but thank you so much for educating me on how to interpret and wire transformers for 480v and 240v on the primary. I have an industrial machine at home I bought from my job and it was wired to 480v 3 phase and now that I finally have installed the machines to run at 240v 3 phase I realized I need to rewire the transformer to step down from 240v 3 phase to 120v single phase instead of 480v 3 phase to 120v single phase.
Excellent videos, but I am still puzzled. I have a dual winding primary transformer (115V/220V), with wires that are not labelled (H1...etc), but by using a continuity checker I have identified both primary windings. Actually there is a fifth primary wire which I assume is some king of fuseable link. Anyway, it is not obvious to me which way around to connect the two windings in parallel for 115V working, as I do not know which wire is at what end of the winding. At about 2min 25sec of this video you make a "key point" of identifying the right and left side of the windings. I realise you are talking about secondary windings, but it's the same issue. From a continuity aspect, it makes little difference, but from a magnetic-circuit point of view, it has to be important. Otherwise there would not be a labelling convention H1....etc.). My concern is that connecting them the wrong way around (there are two permutations), there will be eddy currents and overheating, as a minimum. Is there any advice you can give?
I'm theorizing and brainstorming as well, not speaking from experience-based fact. With that said, maybe ohm the different different leads and use the ratio difference in said ohm measurements to determine where in the windings they are. Or possibly apply a small voltage feed and measure the outputs ?
I worked in factories that had indoor substations & MCCs that put out 12,470 & 7200 and 4160 3 ph. San Francisco's cable cars run on 6 phase power. Double delta & double wye. Military power is 400Hz. Solenoid type voltage testers (Wiggy's & VolCons) usually do not detect 400Hz power, so that's something to remember. It hurts just as bad as 60 Hertz.
Omg,,, you’re amazing. Very good explanation you have no idea how big of a help is this video for me. I’m in electrician course and I was a little bit confused but watching part 1 and 2 helped me so much. Thank you thank you thank you HIGLY RECOMMENDED
Very good. I am a civil pe that has built many many industrial facilities. I understand 3 phase but single phase not so much. This helps
As usual, clear concise information. thank you
I am a union electrician and I have not messed with transformers much. Your vids are amazing, very easy to understand! Def going to help on my craft certification test. Thanks!
Thanks for clearing qoution for transformer
I posed this question on another of your videos as well: if you are drawing off a primary where the two poles are 120 deg out of phase, what does that do to the frequence and voltage of your output on the secondary?
I have a question. My primary is 480v single phase. Stepping down to 120/240v single phase
Why does my low voltage disappear when I hook up the secondary side. But whenever it’s disconnected the low voltage can be read
Would you get Double the current on the first diagram? Parallel secondary winding.
Is it possible to connect one of the legs on the secondary to ground and get 240v on a single hot line and neutral? and if possible which leg would be the ideal one to connect to ground?
I have a newbie question : For the third option 120/240, is the center tap now neutral and both ends hot? How do I wire this to increase amperage for the 120V (similar to first option)?
Looks like you recognized the error from the previous video in this one
How does this effect amperage?
I don't know if you read through comment, but thank you so much for educating me on how to interpret and wire transformers for 480v and 240v on the primary. I have an industrial machine at home I bought from my job and it was wired to 480v 3 phase and now that I finally have installed the machines to run at 240v 3 phase I realized I need to rewire the transformer to step down from 240v 3 phase to 120v single phase instead of 480v 3 phase to 120v single phase.
Very good!
Been looking for examples on 480V 3Phase Xformer using single Phase 480 system to have secondary 120V
Truly amazing,,,, thanks a lot sir....Ive seen your fashion in teaching,,,the world needs your existence.
hopefully your students-past and present- realize what a great teacher you are! I do.
Great videos, your teaching is very awesome.
Excellent videos, but I am still puzzled. I have a dual winding primary transformer (115V/220V), with wires that are not labelled (H1...etc), but by using a continuity checker I have identified both primary windings. Actually there is a fifth primary wire which I assume is some king of fuseable link. Anyway, it is not obvious to me which way around to connect the two windings in parallel for 115V working, as I do not know which wire is at what end of the winding. At about 2min 25sec of this video you make a "key point" of identifying the right and left side of the windings. I realise you are talking about secondary windings, but it's the same issue. From a continuity aspect, it makes little difference, but from a magnetic-circuit point of view, it has to be important. Otherwise there would not be a labelling convention H1....etc.). My concern is that connecting them the wrong way around (there are two permutations), there will be eddy currents and overheating, as a minimum. Is there any advice you can give?
I'm theorizing and brainstorming as well, not speaking from experience-based fact.
With that said, maybe ohm the different different leads and use the ratio difference in said ohm measurements to determine where in the windings they are. Or possibly apply a small voltage feed and measure the outputs ?
I worked in factories that had indoor substations & MCCs that put out 12,470 & 7200 and 4160 3 ph. San Francisco's cable cars run on 6 phase power. Double delta & double wye. Military power is 400Hz. Solenoid type voltage testers (Wiggy's & VolCons) usually do not detect 400Hz power, so that's something to remember. It hurts just as bad as 60 Hertz.
I heard 400Hz shocks feel very different but I imagine it still sucks. Interest post though I'm very interested in reading about 6 phase power....