PURPOSE: A cut out switch for a transformer is provided to prevent the damage of the transformer by flowing in a current of extra-high voltage from an external high-tension line. CONSTITUTION: A pipe(43) is screwed to a top contact forbidden phrase(41). The pipe is installed in a bottom contact forbidden phrase. A connection rod(44) is inserted to the inside of the pipe. A bottom screw groove(44a) is formed in the connection rod. A terminal rod(45) is screwed in the bottom screw groove. A fuse is connected to the terminal rod and is disconnected when generating an over-current. A lead line is connected to the fuse and is accessed to the bottom contact forbidden phrase.
