Star/Delta, but not as I know it.

[Tayters]

Thanks for the quick replies.

Give us control circuit diagram (sheet 8 and 9).

In your diagram we do not have star part at all of star/delta.
Also, for delta, beginning of one winding must be connected with end of other winding, witch is not case in your diagram.
This doesn't have anything to do with star/delta.
It looks like 2speed 3phase motor internally connected in star.
Your setup is probably for getting one additional (third) speed.

If I get to go back and do the repairs (H.P. fault alarm) then I'll grab the other sheets.

I did note the delta seemed to connect each winding to the same phase (i.e. no voltage across it), so assumed U1 wasn't connected to U2 but either V2 or W2, same for V1 and W1.

Which bit of the star bit is missing?
I see U2, V2, W2 connected together on pins 3, 4, 5 and 6 on KM11A. Missing part seems to be the L3 phase to W1.

Makes more sense when you all say not a star/delta motor in the first place. The signs are always there, sometimes I just don't see them.

Cheers,

Andy.