... . If thedegree of accuracy is different, the quantites of relay will be changed also, for example input 176V~264V, ... ,Low-voltage protection: 188V±4V, after low-voltage protection, the output will renew when output voltage run up to 195V.5,Over-voltage protection 243± ... .520.5Package DImensions470X185X245560X275X265640X380X350470X260X290 [EYEN] AVR III - RAE Series Relay automatic voltage regulator