... 1. HT fuses is mainly used in AC50Hz,rated voltage 3.6-40.5kV,rated current up to 200A ... switch,vacuum contact. 2. low voltage fuses are used in AC50Hz,rated insulate voltage up to 690V,conventional free ... air thermal current up to 1250A and is used as supporter(bases)of fuse ... conforms to IEC282-1,GB15166.2,and DIN standardhigh voltage fuse,fuse link,low voltage fuse