Transformers - 6.6KV/240-120

Uhm, i think your mixing generators and motor terminology in there,

A transformer just has 2 coils and depending on the configuration of the second coil the output will be 240 or 120Volt, i suspect the watts will be different depending on what configuration you will use

Sounds like your data sheet indicates a single phase transformer. The secondary side sounds like a center tapped 240 volt single phase winding, giving you in essence two 120 volt windings in series.

Sounds like you have the wrong transformer.

Elect-OK,

We have many transfromers 6.6KV/240-120.

Primary side is delta, the transformer is really a 6900V transformer whixch can be used in star on a 12KV distribution line.

The secondary is 240 center tapped to give 120V.

Small factories and commercial building will use secondary in start to give 240 between phase and neutral and 415 v between phases.

Some distribution pole monted transformer banks do used seconday in delta to give 240 between phases and 120 V between two phases ( red and yellow) and neutral.

The blue phasee to neutral is 200V.

380V is an european power supply.

A simple phone call to the origin of the <...datasheet...> is highly recommended.