My Mind Can't stop thinking about this transformer. I cannot find an answer.
If anyone could explain this situation would be great!! I will be able to sleep better lol.
I Ran into this on a site.
A Single Phase 277v Fan Box. A 277vac Primary and 24vac secondary 45va transformer installed for the control circuit.
Verified Secondary 24vac power as Control boards where acting in a way as if there was a Volt Amp issue.
On secondary I had 20vac. removed loads from the transformer and still 20vac. Across And to ground.
Verified Primary Voltage with transformer energized. L1-N 277v ...L1-Ground 277v
N-Ground 110v .
Now when I shut the disconnect off isolating any loads. I verified Line Voltage into the Disconect. I got L1-N 480v !!...L1-Ground 277v ...N-Ground 277.
L1-N 480v tells me there are two 277v lines a phase out from each other comming in. Very possible Some one missed wired this Nuetral to the Unit.
this scenario acts like the transformer is created its own Nuetral like some 2 secondary Wye transformers I have read about. But I don't understand how.
I would assume 480v feeding a 277v transformer would burn it up.
Now my Questions are.
Why Does this 480v supplied to a 277v transformer not burn the windings up? Thinking somthing to do with Alternating current . helps me sleep.
And why is the Secondary 24vac output less then 24vac.? would assume it would be more?? More Volts into transformer more volts out right? Thinking this also has to do with Alternating current. and Transformer really still only getting 277v applied? and this lack of a true Nuetral causing less Volts Out?
Last question since where here.
Why on single phase 277v systems do I see the 110vac on the Nuetral side of things? does This all have to do with How Wye transformers work?
Some how this is all related. Just can't put it all together. typing this Post I feel like I'm Close.
But I may be completely going the wrong way on it.
If Anyone could explain this would be Amazing!
If anyone could explain this situation would be great!! I will be able to sleep better lol.
I Ran into this on a site.
A Single Phase 277v Fan Box. A 277vac Primary and 24vac secondary 45va transformer installed for the control circuit.
Verified Secondary 24vac power as Control boards where acting in a way as if there was a Volt Amp issue.
On secondary I had 20vac. removed loads from the transformer and still 20vac. Across And to ground.
Verified Primary Voltage with transformer energized. L1-N 277v ...L1-Ground 277v
N-Ground 110v .
Now when I shut the disconnect off isolating any loads. I verified Line Voltage into the Disconect. I got L1-N 480v !!...L1-Ground 277v ...N-Ground 277.
L1-N 480v tells me there are two 277v lines a phase out from each other comming in. Very possible Some one missed wired this Nuetral to the Unit.
this scenario acts like the transformer is created its own Nuetral like some 2 secondary Wye transformers I have read about. But I don't understand how.
I would assume 480v feeding a 277v transformer would burn it up.
Now my Questions are.
Why Does this 480v supplied to a 277v transformer not burn the windings up? Thinking somthing to do with Alternating current . helps me sleep.
And why is the Secondary 24vac output less then 24vac.? would assume it would be more?? More Volts into transformer more volts out right? Thinking this also has to do with Alternating current. and Transformer really still only getting 277v applied? and this lack of a true Nuetral causing less Volts Out?
Last question since where here.
Why on single phase 277v systems do I see the 110vac on the Nuetral side of things? does This all have to do with How Wye transformers work?
Some how this is all related. Just can't put it all together. typing this Post I feel like I'm Close.
But I may be completely going the wrong way on it.
If Anyone could explain this would be Amazing!