Q: what is the difference b/w singlr phase and 3 phase transformer?

<Moved from Electronics and to own topic>



I've seen two types:

1. Basically 2 separate single-phase transformers with it's own primary and secondary combined in one enclosure.

2. A transformer with three primaries and one secondary each primary with it's own phase. This is a very odd configuration and is used when high power rectified power is needed.

A 3 phase transformer is basically 3 single phase transformers tied together