Hello Tom. T address your "problems"
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I start on April fool day. . . . I have nothing to said.
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I pondered on this as well: Using "circuit" of inside a 3 phase induction motor will cause more confuses than a simple instruction set with a to b, b to c., d to e . . . Please refer to BEMA standard on the wire naming of the 3 phase motor.
I put up an image of the circuit diagram with NEMA naming convention and the circuit. Just to please you even I know it will cause more confused then clarification specially about the NEMA's thing. A Google on "nema 12 wire 3 phase motor" will give more information too. -
Name and model . . . Over the years we use many. Let's pick one. GE commercial Motor: X7041046010 with this particular model the naming of the wire are underneath the panel. FYI: The model of the VFD is ABB 30 HP 208---240 VAC VFD ACS550-U1-088A-2 AC DRIVE
4- About pictures: Video and pictures will be follow: I hope with this update of the forum I am able to upload the pictures BC with my I phone 6 every picture is a at or above 2MG limitation of the forum. I preferred to have the pictures as they are because the metadata of the pictures will tell reader time , place . . . they need to be edited before uploaded thus posing issues with "forensic" scientists.
and this video of the system at work:
Some explanation on information about the video: (a) The VFD produces frequency F=7.0 (a) It then turns the large motor at 7.0 * 30 = 210 RPM. (c) the gearbox reduces further by 10 fold = 210 * 0.1 = 21.0 RPM. (d) Then the pulley set reduce further by 25% driving the generator (small motor) at about 21.0 * 0.75= 15.7 RPM. gives & takes
5- The VFD and the 20HP motor is the system allow us to drive the "generator "at the speed we want. Without them we don't know how to turn the generator at low speed.
6- I hope the it helps
Other pictures video of the control panel means nothing without a lengthy background/ introductions about the CT .. Scope .. How they works , , , I choose not to post at this time but eventually.