GB536451A - Improvements in or relating to a.c. electric circuit-breakers - Google Patents
Improvements in or relating to a.c. electric circuit-breakersInfo
- Publication number
- GB536451A GB536451A GB2995139A GB2995139A GB536451A GB 536451 A GB536451 A GB 536451A GB 2995139 A GB2995139 A GB 2995139A GB 2995139 A GB2995139 A GB 2995139A GB 536451 A GB536451 A GB 536451A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- blast
- gas
- isolator
- piston
- 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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
536,451. Gas-blast switches; actuation of switches; switchgear structures. REYROLLE & CO., Ltd., A., ALLAN, A., and AMER, D., F. Nov. 13, 1939, No. 29951. [Class. 38 (v)], The arc formed on separating the contacts of a gas-blast switch in an enclosure, extends between arcing-tips A<3>, B<2> close to the throat of a lateral vent F, the blast flowing around one or both tips in addition to through, the gap. The tip B<2> may be on the movable contact, Figs. 5 and 6 (not shown), but in Fig. 1, both tips are on respective fixed contacts A, B adapted to be bridged by a number of spring-pressed contactfingers C<4> on a rod C<1>, which is urged to closed position by a spring C<2> and carries a piston C<3> sliding in the cylindrical contact B, whereby the blast-gas also opens the contacts. The gapdistance d is chosen such that its breakdownvoltage exceeds normal voltage but is less than the surge voltage set up by arc-suppression at a point well away from current-zero. The nozzlethroat is wider than, and spaced from, the arcing tips to allow the blast to flow between and around the latter, Fig. 2, but for extra-high voltage, the middle part of the throat may be relatively narrow as described in Specification 536,452, Fig. 3, 4 (not shown), to concentrate the blast on the arc. Also the gas-flow channels are made smooth by suitable modification of the contacts. Modifications are also described employing spring blade contacts,. the blast-conduit being disposed around the fixed contact. A switch according to Fig. 1, can be arranged in series with an isolator in a horizontally withdrawable switchgear structure, the layout being such that the arc is electrodynamically bowed into the nozzle, Fig 7. Busbar and cable socket-contacts G<1>, G<2> cooperate with plug contacts J,. J<1> connected respectively to the fixed contacts. L<1>, A of the isolator and gas-blast. switch, the movable isolator-contacts L<2> being in sliding engagement with contacts L' which are strap-connected at L<5> with the carrier B' of contact B. The contact L<2> is pivoted to a floating lever M which is pivoted to a crank M' and to a lever M<2> pivoted to a bell-crank lever M' on a spindle M". The other arm M<3> is linked at M<5> to a lever M<6> operated by the piston M' of a pneumatic motor M<8>. When the circuit is opened, a latch N<2> frees the rod C', and compressed air from reservoir P is admitted above a piston P<2> which opens valve P<4> to admit the operating and deionizing fluid to the main switch. Air also is admitted above piston M', but the lever M' is locked by a latch N until the opened rod C<1> engages a plunger N<6> which rotates a shaft N<5> so that a projection on it (not shown) deflects the latch Shaft N' is locked until a projection N' drops into a notch N<4> on rod C<1>. Opening of the isolator operates a control valve (not shown) for cutting off the gas-supply, whereupon the springs C<2> reclose the main switches and reset the latches N. The circuit is again made by admitting gas beneath the piston M' to close the isolator which is again latched at N.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2995139A GB536451A (en) | 1939-11-13 | 1939-11-13 | Improvements in or relating to a.c. electric circuit-breakers |
US365368A US2298859A (en) | 1939-11-13 | 1940-11-12 | Alternating current electric circuit breaker |
NL107715A NL69213C (en) | 1939-11-13 | 1942-09-17 | |
FR927759D FR927759A (en) | 1939-11-13 | 1946-06-08 | Improvements to electrical circuit breakers for alternating current |
BE467228D BE467228A (en) | 1939-11-13 | 1946-08-12 | |
CH267513D CH267513A (en) | 1939-11-13 | 1947-12-22 | Pneumatic circuit breaker for alternating current. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2995139A GB536451A (en) | 1939-11-13 | 1939-11-13 | Improvements in or relating to a.c. electric circuit-breakers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB536451A true GB536451A (en) | 1941-05-15 |
Family
ID=10299853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2995139A Expired GB536451A (en) | 1939-11-13 | 1939-11-13 | Improvements in or relating to a.c. electric circuit-breakers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB536451A (en) |
-
1939
- 1939-11-13 GB GB2995139A patent/GB536451A/en not_active Expired
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