240 x 480-120/240 V Transformer Ratio

[FaradayFF]

Greetings, Gents -
I'm a little confused on '240x480' designation on the high side of the transformer. This is different from ' 480-120/240' designation.
Does this mean that I can connect either 240V or 480V supply on the primary and get 240V/120V on the secondary side? What does "X' mean in this context?
The nameplate shows a SERIES and Parallel connections. I intend to utilize the series connection. This is a single phase transfomrer.
I intend to energize from 480V on the primary to obtain 240/120V on the secondary for my loads.

Thanks,
EE

 

[petersonra]

There should be a diagram that comes with the Transformer that shows you how to hook up the primary side to either 240 or 480. Usually you jumper two of the windings in parallel for 240 and put them in series for 480.

 

[LarryFine]

The primary is made two 240v windings that can be wired in series or parallel, and the secondary is made of two 120v windings that also can be wired in series or parallel. You can use them in any combination.

 

[electrofelon]

I agree with the above. This made me think of something I've been trying to find for a while. It was a document giving a detailed explanation of all the transformer designations/symbols. Anyone know where that is? It would be good for the OP too.

 

[electrofelon]

I think what I am looking for is in this:
IEEE Std. C57.12.00

Hard to view, keep hitting pay walls.

Smart$ gave a link here post #26 but the link no longer works. Giving up for the night:

system grounding

So would it be fair to say that the utility designation of 4160/2400 is just indicating that it can be used with either a single ended 2400 source or with a 4160Y/2400 source as long as in either case it is connected across a 2400V potential? In the second case that would require an L-N...

forums.mikeholt.com

 

[Hv&Lv]

Greetings, Gents -
I'm a little confused on '240x480' designation on the high side of the transformer. This is different from ' 480-120/240' designation.
Does this mean that I can connect either 240V or 480V supply on the primary and get 240V/120V on the secondary side? What does "X' mean in this context?
The nameplate shows a SERIES and Parallel connections. I intend to utilize the series connection. This is a single phase transfomrer.
I intend to energize from 480V on the primary to obtain 240/120V on the secondary for my loads.

Thanks,
EE

 

[electrofelon]

Found it! Good document to keep handy. Enjoy.