To provide a tap switching device for switching energization with a simple constitution at high accuracy.
A tap switching device comprises a tap selector and a changeover switch. The changeover switch switches a tap, in which a load current from a tap coil flows, from a first tap to a second tap. The changeover switch comprises: an insulation tank 12; a power storage device 14; a drive shaft 16; a first potential insulation tank side fixing member 71; a second potential insulation tank side fixing member; a first neutral potential plate 61; an energization switching member 21; a neutral potential bracket 67; a first potential energizing member 72; a second potential energizing member; and the like. The energization switching member 21 rotates between a first position and a second position together with the rotation of the drive shaft 16. The neutral potential bracket 67 holds a neutral potential side contact always contacting the energization switching member 21. The first potential energizing member 72 has a first potential side contact contacting the energization switching member 21 rotating to the first position, and the second potential energizing member has a second potential side contact contacting the energization switching member 21 rotating to the second position.
KANEKI OSAMU
EGUCHI NAOKI
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