Hitachi, Ltd.

Ayunu Morita

Masato Kobayashi

Tooru Tanimizu

Satoru Kajiwara

Fumio Shibata

Masayoshi Hayakawa

Masatoshi Morita

In an insulated type switching device, during rotation of a movable conductor around a pivotal axis between a stationary conductor and a ground conductor all of which are disposed in a vacuum vessel the movable conductor uninterruptedly takes four positions of closing position Y , opening position Y , disconnecting position Y and grounding position Y , thereby a series of switching operations can be performed uninterruptedly, the operation and handling thereof are facilitated as well as the size of the insulated type switching device is reduced.

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Hitachi, Japan

Ayunu Morita