As a newbie on learning about transformers I was a little confused about the formula you used. After re-reading my text and doing the calculation according to the text, I got approx values for primary and secondary current FLA. Happily, I realized that your formula is a shortcut and accurate (within an approx). I will use it in the future for swift calculations. Thx. Good video for newbies like me. Keep it up

Glad you mentioned selective ampere selection. Retired from a large hospital/research center where they talked about this but never did antyhing on it. Several times a zone mechanic was replacing a 277 volt breaker and caused a short circuit where the 225 amp tripped and not the 20 amp branch circuit breaker. This occured in at least 3 large ( 10 to 14 floor ) buildings.

Hey Tom. Great job on these tech talks. Robert from Omaha

Really like listening to this guy lay down some riffs

nice i just put in a 75 kva transformer and panelboard, it was a great tech talk

One of Eaton’s competitors makes 250 amp MCB and 250 amp buss panels as a standard for a good reason. Many times if 250 is specified, their competitors, like your company, couldn’t compete with the price. Economics pay a huge role in the decisions. Especially if you are the contractor and designer.

Incredibly informative video thank you

You got my attention, thanks for your time!

Great video 👍👍

Take an hour if you have to brother, great information like always.

Your sound is 👍

awesome video

Thank you brotha, appreciate you!

**Very good video !!

STANDARD PRACTICE IS WIRE FOR 125% IN CANADA FOR WIRE SIZE AND NOW SOME AREAS WANT OVERSIZED NEUTRAL .All because of harmonics from VFDs And Switch mode power supplies .Ztrap is optional

LOVE IT 😍🤩👍

Thanks for the video. I have a 30 kva transformer. I need to feed 415vac to the input. I require 240vac at the output and not 120.how do i achieve that?

On the field we use 125% calculation for primary and secondary OCPD.

great job. however I would like to see the wiring process. thank you.

What gauge wire did you use for high and low voltage?

Nice job Tom as usual. I thought you needed to supply ocpd to the load possible regardless...

Do you have troubleshooting videos for these transformers

Thanks

So if I am installing a 75kva Step Up i can just use all the info you just provided but just flip info on primary and secondary ?

Thanks , you really know what you’re speaking ! Any and all advice is welcoming! “ My breaker box in my house is 100A / 120v 2 Phase - I’m installing for electrical back~up only a 5KVA Solar Inverter 230v charge controller 48v PWM what I see is the inverter 230v One Phase the L1 is 115v & the Neural is Hot line of 115v & the ground is a ground ! What’s you’re idea of using the L1 = 115v & the Neutral = 115v into a 20A Double Pole breaker to back-feed my breaker box all One Phase of 115v & the inverter at 5KVA is 86A and my house per month uses between 3-3,500KW a month and I’m going to use a SIEMENS Transformer MTO100A 480-220 input One Phase & Output 240-110 Two Phase ~ Off my Order inverter to the 20A Double Pole breaker . Sounds good ?

so can i run a 3phase cnc machine from 1phase power source using this type of transformer? thanks

for the secondary time i would put 250 amps panel broad

Why is the optimum ocpd 100amps and not 115A

.9 is the efficiency of the transformer

Please I needed to do a house wiring of both 110v and 220v after it all it was 30 socket in number for the 110v and I want to know the type of the step down transformer to use in order to power the entire room.thank you

x the equation i think u will mixt up people more than anything lol u should put all the numbers on the screen maybe it will help...maybe lol.

😜