12 KV;40 AMP;HRC FUSE;FOR SF6/AIR EPOXY INSULATED SWITCHGEAR;500 KVA T/FORMER; PACK OF 1,PACK WEIGHT 2.0 KG;TEMP LIMITED TO 105 DEG C;FULL RANGE FUSE; PARTICULAR USE FOR HAZEMYER RMU 500 KVA TRANSFORMER;APPLICATIONS TO MEET FULL DOMESTIC EM CYC RATING OF 500 KVA TX'S;