PURPOSE:To enable the re-assembly of a transformer without changing the transformer itself in performance characteristics by a method wherein a winding start terminal and a winding end terminal are provided to places which are point-symmetrical about a center of a longitudinal section of the transformer. CONSTITUTION:A low voltage terminal 58, a high voltage terminal 59, terminal fastening bolts 62, and a base 63 are removed. Terminals of a coil 55, a iron core 56, a low voltage winding start terminal 51, a low voltage winding end terminal 52, a high voltage winding start terminal 53, and a high voltage winding end terminal 54 are arranged so as to be point-symmetrical about a center 0. Thereupon, upside down, the terminals 58 and 59, the bolts 62 and the base 63 can be connected again. As the terminals 53 and 54 are replaced with each other on both a high voltage side and a low voltage side at the same time, a performance characteristics of a transformer does not change. By these processes, the re-assembly of a transformer can be made without changing the transformer itself in performance characteristics.
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