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Thanks for your help guys. I have opened it up and replaced the cable ties with some Kevlar twine that I recently got. I'm going to have to pull it apart again as I'm sure I have a bad bearing on the front of the motor - there's a slight click as the bearing rotates when not under load - I guess...

So what sort of temperatures are we talking here 60c or 250c? Or higher?

zlatkodo there is already some cable ties in the motor, what would you have used instead? Also, I was intending to buy a HY 5.5kw VFD for the motor. They seem to run around AU$380 AUD on Aliexpress.

Ok, apart from labelling the connections, I have separated them out, soldered extensions, insulated with fibreglass cable insulation, cable tied up the section I have opened, and sprayed with non-conductive varnish.

zlatkodo , yes, that is the Y point. I have pulled it apart and checked. Here's a picture: I have cut the Y join and confirmed with multimeter that this is the Y.

It's north of AUD$3k to get 3phase to the metre box including a re-wire of the metre box, Plus the 25m of wiring to the workshop sub box and 3phase power points installed there as well, so no the motor conversion is a heap cheaper, the VFD is around AUD$450

So does that mean that I need to open up the part of the winding wrapped in brown paper (underneath the cable tie) in the 3rd picture?

HI, I'm In Australia, so we have 240v single phase and 415v 3 Phase power. I have a 3phase motor rated for 415v. I can't identify whether it is wound for Delta or Star. There are only 3 wires coming out of the motor (it is NOT a dual speed motor)not the usual 6 that I am use to here in...