The high-voltage current-limiting backup fuse for transformer short-circuit protection (hereinafter referred to as the fuse) is suitable for high-voltage indoor power systems with AC 50Hz, rated voltage 15.5KV, and rated current up to 175A as short-circuit protection for power transformers. It is connected in series with GOR4(PRNT)-15.5 oil-immersed transformer overload protection high-voltage fuse to provide full range protection.