JPS4947661B1 - - Google Patents

Info

Publication number
JPS4947661B1
JPS4947661B1 JP44039453A JP3945369A JPS4947661B1 JP S4947661 B1 JPS4947661 B1 JP S4947661B1 JP 44039453 A JP44039453 A JP 44039453A JP 3945369 A JP3945369 A JP 3945369A JP S4947661 B1 JPS4947661 B1 JP S4947661B1
Authority
JP
Japan
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.)
Pending
Application number
JP44039453A
Other languages
Japanese (ja)
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 filed Critical
Priority to JP44039453A priority Critical patent/JPS4947661B1/ja
Priority to US38659A priority patent/US3641394A/en
Priority to FR7018573A priority patent/FR2048650A5/fr
Priority to GB24608/70A priority patent/GB1285283A/en
Priority to DE2025120A priority patent/DE2025120C3/en
Publication of JPS4947661B1 publication Critical patent/JPS4947661B1/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
    • H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/668—Means for obtaining or monitoring the vacuum
JP44039453A 1969-05-22 1969-05-22 Pending JPS4947661B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP44039453A JPS4947661B1 (en) 1969-05-22 1969-05-22
US38659A US3641394A (en) 1969-05-22 1970-05-19 Vacuum switch assembly
FR7018573A FR2048650A5 (en) 1969-05-22 1970-05-21
GB24608/70A GB1285283A (en) 1969-05-22 1970-05-21 A vacuum switch assembly
DE2025120A DE2025120C3 (en) 1969-05-22 1970-05-22 Multi-phase vacuum switch arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44039453A JPS4947661B1 (en) 1969-05-22 1969-05-22

Publications (1)

Publication Number Publication Date
JPS4947661B1 true JPS4947661B1 (en) 1974-12-17

Family

ID=12553443

Family Applications (1)

Application Number Title Priority Date Filing Date
JP44039453A Pending JPS4947661B1 (en) 1969-05-22 1969-05-22

Country Status (5)

Country Link
US (1) US3641394A (en)
JP (1) JPS4947661B1 (en)
DE (1) DE2025120C3 (en)
FR (1) FR2048650A5 (en)
GB (1) GB1285283A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3693053A (en) * 1971-10-29 1972-09-19 Gen Electric Metal oxide varistor polyphase transient voltage suppression
US3911322A (en) * 1974-03-05 1975-10-07 Westinghouse Electric Corp Method and circuit arrangement for an improved low cost lightning arrester
FR2480441A1 (en) * 1980-04-15 1981-10-16 Enertec METHOD AND DEVICES FOR IDENTIFYING DEFECTIVE PHASES IN AN ELECTRICAL DISTRIBUTION NETWORK
US4652867A (en) * 1984-09-25 1987-03-24 Masot Oscar V Circuit breaker indicator
GB8820953D0 (en) * 1988-09-07 1988-10-05 Furse W J & Co Ltd Apparatus suitable for use in protecting electrical installations from transients
FI116176B (en) * 2004-05-18 2005-09-30 Abb Oy Grounding and Surge Protection Arrangement
CN107768185B (en) * 2016-08-16 2020-01-10 中国石油化工股份有限公司 Vacuum degree monitoring method of vacuum chamber

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US897211A (en) * 1907-03-15 1908-08-25 Gen Electric Protective device for electrical systems.
US981742A (en) * 1907-06-01 1911-01-17 Gen Electric Lightning-arrester.
US2520956A (en) * 1947-03-14 1950-09-05 James P Parker Breakdown indicator for insulated aircraft antennas
NL280036A (en) * 1961-07-03

Also Published As

Publication number Publication date
DE2025120A1 (en) 1970-12-23
GB1285283A (en) 1972-08-16
FR2048650A5 (en) 1971-03-19
US3641394A (en) 1972-02-08
DE2025120C3 (en) 1974-06-27
DE2025120B2 (en) 1972-07-06

Similar Documents

Publication Publication Date Title
AU2270770A (en)
AU465413B2 (en)
AU450150B2 (en)
FR2048650A5 (en)
AU2355770A (en)
AU442375B2 (en)
AU470301B1 (en)
AU5113869A (en)
AU438128B2 (en)
AU442554B2 (en)
AU442285B2 (en)
AU442322B2 (en)
AU442357B2 (en)
AT308690B (en)
AU442380B2 (en)
AU442463B2 (en)
AU442535B2 (en)
AU442538B2 (en)
AU470661B1 (en)
AU5077469A (en)
AU5109569A (en)
AU4540468A (en)
AR203167Q (en)
AU4949169A (en)
AU4815038A (en)