... voltage circuit isolation, when change the size of the control signal, it can change the size of the output trigger thyristor phase, Namely ... department transformer primary, there are 220 VAC and 380 VAC two specifications; 220 VAC files of the input voltage for 165 ... optional radiator, B-105, B-150 and C series radiator, (accessories detailed introduction).The input control parameters (25 degree C ...