Patent Number: 6,529,009

Title: Vacuum switch including vacuum-measurement devices, switchgear using the vacuum switch, and operation method thereof

Abstract: A vacuum switch is composed by installing a vacuum circuit-breaker and a disconnector in different grounded vacuum vessels, respectively, and a vacuum-measurement device is attached to each grounded vacuum vessel. The above vacuum vessel communicates with one of the grounded vacuum vessels, and the degree of vacuum in the vacuum vessel can be directly measured and monitored.

Inventors: Kikukawa; Shuuichi (Hitachi, JP), Kojima; Katsunori (Hitachi, JP), Tanimizu; Tooru (Hitachi, JP), Morita; Ayumu (Hitachi, JP), Tsuji; Masashige (Narashino, JP)

Assignee: Hitachi, Ltd.

International Classification: H01H 33/668 (20060101); H01H 33/66 (20060101); H01H 31/00 (20060101); G01R 031/327 (); G01L 021/30 (); H01H 033/66 (); H01H 033/02 ()

Expiration Date: 03/04/2020