| The STEU 320/23 transformer shown here:
| is 320 kVA. As the transformer has 2 x 115 Volt outputs, can anyone tell me
| if the 320 kVA rating is 160 kVA for each output.
This much is certain. The rating of each of the two 115V secondary windings
is half of the total transformer rating.
| If this is so, and I need 320 kVA, can I parallel up the two secondary
| outputs. Also, would you normally earth down one side of the secondary.
If there are 4 separate terminals, you most likely can. I could not find any
wiring diagrams on the web site that would give some certainty to this answer.
But in general, if the transformer has 2 secondary windings with the same
voltage and current rating, they would be designed to be wired in parallel
or series. Since the primary is 230V, the only uses for a 230V series
connection would be to get 230V isolated, or as a 460V autotransformer.
If that were all it was designed for, one 230V winding would do the job.
There's little point in making a transformer with 4 secondary terminals
for 2x115V unless they can be wired in parallel (same turns ratio) or in
There is still the small chance they didn't do that. You need to find out from
the manufacturer just what the wiring truly is (e.g. fully separate secondary
windings with exactly the same number of turns).
I've looked at a number of US transformer manufacturers, and many do show
their winding diagrams, and some even show application wiring examples.
|WARNING: Due to extreme spam, googlegroups.com is blocked. Due to ignorance |
| by the abuse department, bellsouth.net is blocked. If you post to |
Click to see the full signature.