Help understanding these transformers

[Ithinkigotit]

Sorry I posted twice still new and trying to figure it out

I have a few transformers I’m trying to wrap my head around as I don’t have much experience with these setups

480v delta to 600 delta 1600 amp transformers has 380v A to ground 277v B to ground and 380v C to ground I haven’t done phase to phase (waiting on a 1000v rated meter ) but it’s all mark 575or 600 what style of transformers is this?

240v service off the street has 240v phase to phase but to ground is A-136v B-190v C-112v

Also have som transformer banks with 600v primary 120/240 secondary 3 of them all make one leg of 120 and feed a 3 phase panel that has 220v phase to phase if I switch them out to a 120/208y transformer it should be fine as long as any motor loads are rated for that voltage correct?

Thanks in advance!

 

[Jraef]

On ungrounded delta transformers, there is no established voltage reference to ground, think of it as “floating”. So what your meter is reading is the capacitive voltage, which can change based on site conditions, so it is basically a pointless exercise.

If you are going to be doing industrial work, get out of the habit of only reading line to ground voltages, line to line is what matters most.

 

[Besoeker3]

Sorry I posted twice still new and trying to figure it out

I have a few transformers I’m trying to wrap my head around as I don’t have much experience with these setups

480v delta to 600 delta 1600 amp transformers has 380v A to ground 277v B to ground and 380v C to ground I haven’t done phase to phase (waiting on a 1000v rated meter ) but it’s all mark 575or 600 what style of transformers is this?

240v service off the street has 240v phase to phase but to ground is A-136v B-190v C-112v

Also have som transformer banks with 600v primary 120/240 secondary 3 of them all make one leg of 120 and feed a 3 phase panel that has 220v phase to phase if I switch them out to a 120/208y transformer it should be fine as long as any motor loads are rated for that voltage correct?

Thanks in advance!

My experience is industrial. We use custom projects. That said, regular systems are all 400/230 V But then I am British................,)

 

[ptonsparky]

Study one system until your comfortable, then move to another.