Robert Swinney wrote:
Consider this: Get 3, 220 V "variacs" (variable autotransformers) or a
single 3-phase, ganged, 220 V variac. Connect each of your 3 phases
through each of the variacs to 3, 220 V, 200 Watt lamps, 3 in parallel, to
each variac. At full brilliance, the 9 lamps would be "drawing" nearly 3
HP.

Bob Swinney

It's a nice idea, but a three phase variac will cost big money. At least
round here it will. I've seen them sell on eBay for £100+.

Chris