Can you use the Aquavar drive on a 230Volt “Open Delta” 3 wire power system?
Yes, however, this is sometimes referred to as a “wild leg” delta system. This is really a single phase system with two transformers to derive a third leg. This system provides POOR POWER regulation under loads. When you take a static voltage check, it may appear o.k. However, when you start the pump the third leg will vary. Treat these as SINGLE phase systems and over size your drive. Use a 20HP drive on a 10HP 230volt pump.
