GB643096A - Arrangement in electric compressed air blast circuit breakers - Google Patents
Arrangement in electric compressed air blast circuit breakersInfo
- Publication number
- GB643096A GB643096A GB874/48A GB87448A GB643096A GB 643096 A GB643096 A GB 643096A GB 874/48 A GB874/48 A GB 874/48A GB 87448 A GB87448 A GB 87448A GB 643096 A GB643096 A GB 643096A
- Authority
- GB
- United Kingdom
- Prior art keywords
- air
- nozzle
- arc
- ionized
- blast
- 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
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Circuit Breakers (AREA)
Abstract
643,096. Air-blast switches. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. Jan. 12, 1948, No. 874. Convention date, Jan. 15, 1947. [Class 38(v)] In an air-blast circuit-breaker having a nozzle or passage through which a stream of compressed air is passed to extinguish the arc formed when the contacts open, openings or channels connect the space immediately adjacent to the inlet side of the nozzle or passage to the free air to allow air ionized by the arc to escape. In Fig. 1 a moving contact 4 passes through a nozzle opening 6 in an insulating partition 5 to co-operate with a fixed contact 2: When the contacts are opened, the arc formed would, at the peak of the current cycle, tend to produce a back-pressure sufficient to reduce the flow of air through the nozzle and thus enable the arc to cause the air adjacent the inlet side of the nozzle to become ionized as indicated by the dots in Fig. 1. However, this ionized air can escape through passages 10, so that as the current falls, the arc is extinguished by a blast of air which is not ionized. In Fig. 2 (not shown) the partition 5 is of metal and the nozzle 6 serves as the stationary contact, whilst contact 2 is used as an auxiliary arcing contact. The invention may also be applied to a circuit-breaker in which the moving contact moves transversely across a blast passage, Fig. 3 (not shown). The Specification as open to inspection under Sect. 91 also describes and illustrates the provision of apertures extending through the partition 5, so as to interconnect the inlet and outlet sides of the nozzle. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE265317X | 1947-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB643096A true GB643096A (en) | 1950-09-15 |
Family
ID=20306588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB874/48A Expired GB643096A (en) | 1947-01-15 | 1948-01-12 | Arrangement in electric compressed air blast circuit breakers |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2632828A (en) |
| CH (1) | CH265317A (en) |
| FR (1) | FR959519A (en) |
| GB (1) | GB643096A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2761935A (en) * | 1952-07-30 | 1956-09-04 | David C Prince | Circuit breaker |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US692735A (en) * | 1901-06-17 | 1902-02-04 | James R Thompson | Combined electric switch and spark-blow-out mechanism. |
| US1334645A (en) * | 1917-01-13 | 1920-03-23 | Bechoff Ferdinand | Air-break switch |
| US1861128A (en) * | 1928-12-28 | 1932-05-31 | Milliken Humphreys | High-power circuit-breaker |
| GB375308A (en) * | 1931-03-18 | 1932-06-20 | Electr & Allied Ind Res Ass | Improvements relating to electric switches and circuit breakers |
| BE388499A (en) * | 1931-05-21 | |||
| GB398213A (en) * | 1932-03-01 | 1933-09-01 | Willis Bevan Whitney | Improvements in or relating to circuit breakers |
| DE687791C (en) * | 1932-06-04 | 1940-02-06 | Const Electr De Delle Sa Atel | Electric switch with arc extinguishing by flowing pressurized gas |
| US2133938A (en) * | 1933-12-08 | 1938-10-18 | Strauss Frida | Electric switch |
| US2222719A (en) * | 1939-07-08 | 1940-11-26 | Gen Electric | Air blast circuit breaker |
-
0
- FR FR959519D patent/FR959519A/fr not_active Expired
-
1948
- 1948-01-06 US US688A patent/US2632828A/en not_active Expired - Lifetime
- 1948-01-10 CH CH265317D patent/CH265317A/en unknown
- 1948-01-12 GB GB874/48A patent/GB643096A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2632828A (en) | 1953-03-24 |
| FR959519A (en) | 1950-03-31 |
| CH265317A (en) | 1949-11-30 |
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