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Title:
【発明の名称】真空スイッチの異常検出装置
Document Type and Number:
Japanese Patent JP3346780
Kind Code:
B2
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WO/2009/073875LOAD TAP CHANGER
Inventors:
Shigekatsu Sato
Application Number:
JP16082991A
Publication Date:
November 18, 2002
Filing Date:
June 06, 1991
Export Citation:
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Assignee:
株式会社日立製作所
International Classes:
H01F29/04; G01M3/40; H01H33/66; (IPC1-7): H01F29/04; G01M3/40; H01H33/66
Domestic Patent References:
JP2216805A
JP62199007A
JP49100573A
JP56109239U
Attorney, Agent or Firm:
Kiyoshi Maruyama (6 others)



 
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