JPS51115667A - Method of detecting deterioration of vacuum for vacuum valve circuit breaker - Google Patents

Method of detecting deterioration of vacuum for vacuum valve circuit breaker

Info

Publication number
JPS51115667A
JPS51115667A JP4028375A JP4028375A JPS51115667A JP S51115667 A JPS51115667 A JP S51115667A JP 4028375 A JP4028375 A JP 4028375A JP 4028375 A JP4028375 A JP 4028375A JP S51115667 A JPS51115667 A JP S51115667A
Authority
JP
Japan
Prior art keywords
vacuum
circuit breaker
valve circuit
detecting deterioration
vacuum valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4028375A
Other languages
English (en)
Japanese (ja)
Other versions
JPS561728B2 (en:Method
Inventor
Yukio Kurosawa
Hiroyuki Kanbara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4028375A priority Critical patent/JPS51115667A/ja
Publication of JPS51115667A publication Critical patent/JPS51115667A/ja
Publication of JPS561728B2 publication Critical patent/JPS561728B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
JP4028375A 1975-04-04 1975-04-04 Method of detecting deterioration of vacuum for vacuum valve circuit breaker Granted JPS51115667A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4028375A JPS51115667A (en) 1975-04-04 1975-04-04 Method of detecting deterioration of vacuum for vacuum valve circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4028375A JPS51115667A (en) 1975-04-04 1975-04-04 Method of detecting deterioration of vacuum for vacuum valve circuit breaker

Publications (2)

Publication Number Publication Date
JPS51115667A true JPS51115667A (en) 1976-10-12
JPS561728B2 JPS561728B2 (en:Method) 1981-01-14

Family

ID=12576273

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4028375A Granted JPS51115667A (en) 1975-04-04 1975-04-04 Method of detecting deterioration of vacuum for vacuum valve circuit breaker

Country Status (1)

Country Link
JP (1) JPS51115667A (en:Method)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60160932U (ja) * 1984-04-02 1985-10-25 三菱重工業株式会社 管曲げ用マンドレル

Also Published As

Publication number Publication date
JPS561728B2 (en:Method) 1981-01-14

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