Here are some photos of a transformer I am doing.
It is a GE 500 KVA 480-208Y/120 Transformer.
We did not ask for fan cooling or shunt trip molded case switches or high temp alarms, none of the cut sheets I received showed any of this.
There are temp sensors in each coil, if the temp rises the fans come on, more heat brings on an audible alarm and finally if it keeps getting hotter the shunt trip switches open.
GE says it's a benefit as the footprint is much smaller, the reality IMO is that the fans and switches cost less than using more raw material to produce a 500 KVA that does not need forced cooling.
You can click on the rest of the pictures to get a larger one, be warned the large photos are large files.
I would be happy to hear any comments, good bad or otherwise.
The job is yet to be inspected.
[This message has been edited by iwire (edited 09-16-2006).]