We received a 225kva Wye to Wye transformer 480/277 to 208/120 however our primary side from the city is 480 delta. The primary was hooked up without the neutral required for a Wye primary and is now creating a 208v high leg on the secondary side. This is not making sense to me. I would think...

Hello all: Just joining to see what conversations are happening here around electric power transmission, power reliability, asset management, transformers, oil and DGA testing, moisture reduction, monitoring and maintenance. I'm sure I'll lurk for a while then dive in when I see something where...

Hi there, I have been just doing my code book work figuring out everything I need to know for my upcoming job. Just wanted to run my thoughts past you since before I pay for a used transformer I want to make sure it works for my situation. I have a shed that was previously fed #14 AWG teck...

My company does audio visual services. When we use a single 120/208 VAC Three-phase "Y" power source for lighting, audio and video we get noise caused by the lighting dimmers injected into the audio and video. We purchased a 30 KVA Isolation transformer. We tie-in power and run it first to...

anyone have any ideas on what is the best way to run a 3 phase motor on a 2 phase or single phase system?

Guys, I need some help. I'm going to take my unlimited test next week and I know there's a load calculation on transformers. He question is a transformer diagram, the voltage is 120/208 volt. There's a total of 4 transformers.1 is 3 phase 30 kw continuously lighting load and is connected to the...

Hello all, Many halogen transformers don't work with LED bulb replacements because there is a minimum power requirement for the switchmode transformer to work properly. Therefore, I would think that if I wired 4 or 5 LED globes in parallel to a 60VA transformer then it should work. Is this...