FR2048650A5 - - Google Patents
Info
- Publication number
- FR2048650A5 FR2048650A5 FR7018573A FR7018573A FR2048650A5 FR 2048650 A5 FR2048650 A5 FR 2048650A5 FR 7018573 A FR7018573 A FR 7018573A FR 7018573 A FR7018573 A FR 7018573A FR 2048650 A5 FR2048650 A5 FR 2048650A5
- Authority
- FR
- France
- 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.)
- Expired
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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP44039453A JPS4947661B1 (de) | 1969-05-22 | 1969-05-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2048650A5 true FR2048650A5 (de) | 1971-03-19 |
Family
ID=12553443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7018573A Expired FR2048650A5 (de) | 1969-05-22 | 1970-05-21 |
Country Status (5)
Country | Link |
---|---|
US (1) | US3641394A (de) |
JP (1) | JPS4947661B1 (de) |
DE (1) | DE2025120C3 (de) |
FR (1) | FR2048650A5 (de) |
GB (1) | GB1285283A (de) |
Families Citing this family (7)
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 (fr) * | 1980-04-15 | 1981-10-16 | Enertec | Procede et dispositifs d'identification de phases en defaut dans un reseau de distribution electrique |
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 (fi) * | 2004-05-18 | 2005-09-30 | Abb Oy | Maadoitus- ja ylijännitesuojausjärjestely |
CN107768185B (zh) * | 2016-08-16 | 2020-01-10 | 中国石油化工股份有限公司 | 一种真空室的真空度监测方法 |
Family Cites Families (4)
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 (de) * | 1961-07-03 |
-
1969
- 1969-05-22 JP JP44039453A patent/JPS4947661B1/ja active Pending
-
1970
- 1970-05-19 US US38659A patent/US3641394A/en not_active Expired - Lifetime
- 1970-05-21 FR FR7018573A patent/FR2048650A5/fr not_active Expired
- 1970-05-21 GB GB24608/70A patent/GB1285283A/en not_active Expired
- 1970-05-22 DE DE2025120A patent/DE2025120C3/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2025120A1 (de) | 1970-12-23 |
US3641394A (en) | 1972-02-08 |
JPS4947661B1 (de) | 1974-12-17 |
DE2025120B2 (de) | 1972-07-06 |
GB1285283A (en) | 1972-08-16 |
DE2025120C3 (de) | 1974-06-27 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |