... advantages: 1. Product start-up performance is very good. It is the use of series resonant circuit, the SCR IF ... 3. Products almost no higher harmonics. Does not pollute the power grid, transformers, switch does not heat, will not interfere with electronic ... transformer capacity: IGW-300 IF: 315KVA power transformer to work. The SCR does not work IF 315KVA transformer, severe fever, and even burned ...