It wasn't really the stinger but we did have a recurring problem of blown power supplies and strange problems in one system. The guys who installed it had never heard of delta and assumed everything was always 208v (the factory default). When I got there to figure out what was going on I saw the 240v right away on my Drainitz (actually closer to 250) and explained delta to them. That was also the same place where we had all the phase balance problems.
We retapped all the power supplies and balanced the single phase loads. Things suddenly got a whole lot better.
