... the quantites of relay will be changed also, for example input 176V~264V, the degree ofaccuracy is ... it use carton, but for big capacity, we should use strong wooden case for protection.Q 4. what kind ... capacity. A. It depends on which model.For example for relay type small capacity , month capacity can ... ? A. Our company already achieve ISO, ccc, and for products, we have CE, SONCAP, GOST, UL(pending) ...