GB637393A - Improvements in or relating to electrical circuit breakers and electrical circuit protection systems - Google Patents
Improvements in or relating to electrical circuit breakers and electrical circuit protection systemsInfo
- Publication number
- GB637393A GB637393A GB1934747A GB1934747A GB637393A GB 637393 A GB637393 A GB 637393A GB 1934747 A GB1934747 A GB 1934747A GB 1934747 A GB1934747 A GB 1934747A GB 637393 A GB637393 A GB 637393A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- contacts
- switch
- disc
- repulsion
- 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.)
- Expired
Links
Classifications
-
- 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
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/285—Power arrangements internal to the switch for operating the driving mechanism using electro-dynamic repulsion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
637,393. Electromagnetic switches; airbreak switches. FORMAN. J. July 18, 1947, No. 19347. [Class 38 (v)] A switch comprises means for normally maintaining it closed and means for opening or tripping it, the latter comprising a non- ferromagnetic repulsion member of good electrical conductivity, a repulsion coil adjacent said member, a storage system for electrical energy and means for discharging the system through the coil in a current pulse so as to produce repulsion between the coil and the member to open the switch. The contacts 1, 2, Fig. 2, are normally held closed by compressed air, admitted through a non-return valve V and acting on a copper or aluminium disc 10 secured to a tube 3 connected to contacts 2 through a rubber cushion 17. Upon energization of the coil 11 by a current pulse, the disc 10 is repelled upwards with the contacts 2, and a second repulsion member 18 moves downwards to compress air in the contact chamber to minimize risk of arcing. The air pressure on disc 10 is released through ports 20 in a sleeve 19 movable therewith. When the ports 20 pass ports 24 in the case 15 the pressure builds up again and the disc is retarded until ports 20a and 24 release the pressure again. The contacts are reclosed by manually moving the rod 25 downwards. In a modification, Fig. 4, the contacts are held closed by a coil 4 energized over contacts 6a, which are opened upon energization of coil 11 by downward repulsion of a ring member 8. Upward movement of disc 10 is initially unrestricted due to a lost-motion connection between tube 3 and contact 2 and is finally retarded by a coil 13. The contacts are held open by the coil 4 acting on a second armature 6b on tube 3, the coil 4 being re-energized at the end of the said current pulse. A spring 5 absorbs the recoil of the coil 11. In a further modification (Fig. 1, not shown), the contacts are held open by a mechanical latch and a further coil is provided to stop the disc 10. Protective cut-out arrangements.-Upon a fault in the line 26, the voltage induced in a coil 36, acting as the secondary of a saturable reactor 37, breaks down an intermediate sparkgap 32, 31, to trigger the main gap 31, 31, thereby discharging a condenser 30 through the coil 11 to operate a switch, as in Specification 605,747, [Group XXXVI]. At the same time a pulse is applied over transformer 33 to fire a thyratron 42 and so discharge a condenser 43 through the retarding coil 13, a second pulse being applied in the reverse direction through a second gas-filled valve 46 and the stopping coil 14. The switch is reclosed by means of a manual switch 50 energizing the coil 14 by means of an impulse from a condenser 47, the switch 50 also automatically tripping the mechanical latch (when provided) or momentarily de-energizing the coil 4 when this is arranged to hold the contacts 2 open, as in Fig. 4. Arc-rupturing in switches.-In addition to the member 18 in Fig. 2, the switch is arranged to open at the zero of the cycle by a phase adjuster 40, Fig. 3, controlling the moment of sparking at 32, 31. Further, a reverse current impulse is applied to the contacts 1, 2, from a condenser 52 which is discharged over valves 55, 56 when these strike. upon increase of voltage in the winding 67 of reactor 37, the impulse being such as to neutralize the voltagerise at the contacts 1, 2 during opening. Specification 637,392 also is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1934747A GB637393A (en) | 1947-07-18 | 1947-07-18 | Improvements in or relating to electrical circuit breakers and electrical circuit protection systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1934747A GB637393A (en) | 1947-07-18 | 1947-07-18 | Improvements in or relating to electrical circuit breakers and electrical circuit protection systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB637393A true GB637393A (en) | 1950-05-17 |
Family
ID=10127827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1934747A Expired GB637393A (en) | 1947-07-18 | 1947-07-18 | Improvements in or relating to electrical circuit breakers and electrical circuit protection systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB637393A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1069269B (en) * | 1956-06-28 | 1959-11-19 | ||
DE1116787B (en) * | 1956-02-08 | 1961-11-09 | Siemens Ag | Current limiter in the form of a sliding resistor |
FR2357048A1 (en) * | 1976-06-28 | 1978-01-27 | Merlin Gerin | Current limiting switch - has movable contact connected to actuator by one way gears fitted with shock absorber |
EP0007123A1 (en) * | 1978-06-26 | 1980-01-23 | BBC Aktiengesellschaft Brown, Boveri & Cie. | High speed actuating mechanism |
GB2150352A (en) * | 1983-11-25 | 1985-06-26 | Electricity Council | Circuit breaker assembly |
-
1947
- 1947-07-18 GB GB1934747A patent/GB637393A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1116787B (en) * | 1956-02-08 | 1961-11-09 | Siemens Ag | Current limiter in the form of a sliding resistor |
DE1069269B (en) * | 1956-06-28 | 1959-11-19 | ||
FR2357048A1 (en) * | 1976-06-28 | 1978-01-27 | Merlin Gerin | Current limiting switch - has movable contact connected to actuator by one way gears fitted with shock absorber |
EP0007123A1 (en) * | 1978-06-26 | 1980-01-23 | BBC Aktiengesellschaft Brown, Boveri & Cie. | High speed actuating mechanism |
WO1980000203A1 (en) * | 1978-06-26 | 1980-02-07 | Bbc Brown Boveri & Cie | High speed actuating mechanism |
GB2150352A (en) * | 1983-11-25 | 1985-06-26 | Electricity Council | Circuit breaker assembly |
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