MEASUREMENT,WINDOW TYPE;TOROIDAL;INDOOR FOR METERING;660 V;3000/1600/800/5 AMP; 5 VA;CLASS 1,EXT 200% ON 800/5 AMP; SINGLE PHASE;50 HZ;114 MM INTERNAL DIA, C/W FOOT MTG BRACKETS;IN ACCORDANCE WITH DWG'S NO'S 2729-A4 & 4818-A4;TO AS60044.1;PACK OF 3,PACK WEIGHT 13.8 KG;