Some of the loads we had in the sorters needed snubbers (RC networks) but strangely the bigger 3p motors didn't. We were still losing 2a SSRs on a small shaded pole motor (fraction of an amp) and the answer after a while was to use a 10a unit. The 3/4 HP 208 3p motors were on 40a or later 45a devices. We lost an SSR occasionally but it was pretty rare.
