
This is an industrial AC motor controller (variable speed drive) in the Control Techniques range from Emerson. The model is Unidrive SP 5402 which is nominally 400 Vac, 75/90 kW continuous motor power.
It is as-new, but not in original packaging. It has only been used by a little old lady to test unloaded motors on the bench on Sundays.

I bought it new for just over $12,000 in June 2009 but I'm willing to sell it for less than half that. $5,000 excluding packing and freight. It is located in Bardon, Brisbane, QLD, Australia. Payment can be by electronic transfer.
You can contact me by Private Message on the forum, or by email to d dot keenan at bigpond dot net dot au, or by phone on 07 3366 2660.
As many of you will know, I bought it for use in Coulomb's and my high-performance MX-5 conversion. But it didn't quite fit it in the little 2-seater, while leaving enough room for the battery required to deliver the peak power.

So for now we have gone with a Tritium WaveSculptor 200 with its lower voltage (splitting the battery into two equal halves and paralleling them) and hence the MX-5 will have a lower top speed than planned.
The Unidrive SP5402 would suit a high-performance ute, van or truck conversion, or anywhere that space isn't such an issue. We can advise on suitable induction motors to use with it. It can also drive permanent magnet brushless motors.
Included are: an LED keypad, an Applications Lite v2 programming module and the SYPT-Pro software.
Specifications:
DC Bus voltage range 425 to 815 Vdc (e.g. 150 to 226 lithium cells)
Max continuous AC output voltage 480 Vac (requires Vdc > sqrt(2)*Vac)
Max continuous AC output current 168 A
Peak AC output current 273 A for 40 seconds (closed loop)
Dimensions 298 x 310 x 820 mm
Mass 55 kg
Forced-air cooled by built-in blower.
You can see the manufacturer's sales brochure here. And if you register (free) on their website, you can read the full user guide and drawings in the "Downloads" tab here.