GB250937A - Improvements relating to electrical circuit-breakers - Google Patents
Improvements relating to electrical circuit-breakersInfo
- Publication number
- GB250937A GB250937A GB9595/26A GB959526A GB250937A GB 250937 A GB250937 A GB 250937A GB 9595/26 A GB9595/26 A GB 9595/26A GB 959526 A GB959526 A GB 959526A GB 250937 A GB250937 A GB 250937A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- rod
- spring
- held
- circuit
- 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
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H3/3031—Means for locking the spring in a charged state
- H01H2003/3036—Means for locking the spring in a charged state using of balls or rollers in the locking device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
- H01H3/605—Mechanical arrangements for preventing or damping vibration or shock making use of a fluid damper
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/128—Manual release or trip mechanisms, e.g. for test purposes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0066—Auxiliary contact devices
Landscapes
- Breakers (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
250,937. Metropolitan-Vickers Electrical Co., Ltd., (Assignees of Aalborg, C., and Macneill, J. B.). April 15, 1925, [Convention date]. Automatic circuit-breakers; oil switches; arcrupturing devices.-Loose-handle automatic circuit-breakers having their relatively movable contacts capable of moving independently of the operating mechanism are provided with means for effecting the acceleration of the contacts as they approach their maximum separation. As shown in Fig. 1, the main and auxiliary movable contacts 13, 14 which co-operate with corresponding fixed contacts 11, 12 are mounted on the end of a vertically movable rod 15 which terminates at its upper extremity in a member 36 having a lateral recess in which is held one of the rollers 59 of a latching mechanism 16, so holding the switch closed against the action of springs 31, 32. The rollers 59 with spacers 61 are contained within a transverse tube 58 and are held in latching position by a member 63 pressed upwards by a spring 65 so that its end projects through the wall of the tube under the end of a tripping lever 76 which is biassed by a spring in an anti-clockwise direction. The latching mechanism 16 is supported by links from an actuating lever 45 which has one end pivoted at 49 and the other end connected by a link 46 to a crank-arm on the manually or motor operated spindle 47. The lever 45 is normally held by a spring-pressed detent 101. If the circuit-breaker is tripped either manually by a lever 82 operated by an external member 83 or electromagnetically by the core of the solenoid 72 the lever 76 is rotated against its bias to depress the member 63 so permitting the springs 31, 32 to move down rapidly the contact rod 15, forcing aside the ball 59 engaging the recess in its upper end 36. This downward movement is at first rapidly accelerated by the joint action of both compression springs 31, 32 until the shorter spring 31 has fully extended after which its downward movement is continued with decreased acceleration until the expansion of the spring 31 is prevented by the washer 32 at its lower end being held against the fixed shoulder 41. If the kimetic energy imparted to the contact rod is sufficient, the rod will continue its downward movement and by causing the enlarged portion 34 to engage the upper washer 29 causes further compression of the spring 31 to produce a cushioning effect. This effect is assisted by dashpot action between the rounded enlargement 26 of the rod 15 and members 109 surrounding it. During the downward movement of the contact rod 15 the enlargement 34 engages a projection 104 of a pivoted lever 103 which moves aside the detent 101 and allows the lever 45 to drop to the position shown in Fig. 3, during which movement the upper end 36 of the rod 15 is re-engaged within the latching mechanism 16 so that on movement of the operating mechanism to reclose the circuit-breaker the rod 15 is held by the latching mechanism and raised until the lever 45 is again latched in position. During the downward movement of the lever 45 the tripping lever and solenoid which is carried by brackets 72 also pivoted at 49 is moved around by springs to a limited extent so that in reclosure the tripping mechanism is always operable by overload to trip the latching mechanism and the circuit-breaker cannot be held closed while such overload continues. An indicator is operated by a switch 91 connected by mechanism to a pivoted bell-crank lever 95, the free end of which is held against the upper end 55 of a member 57 pressed by a spring 56 against the upper end of the contact rod. On release of the rod the member 57 moves between the rollers 59 and the indicator switch is then changed over by the spring 95. A magnetic blow-out consisting of an energizing coil 18 and a U-shaped core 19 is supported by a rod 22 adjacent to the circuit-breaker contacts, the whole, mechanism being disposed within the oil tank 10.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US23401A US1872382A (en) | 1925-04-15 | 1925-04-15 | High speed circuit interrupter |
Publications (1)
Publication Number | Publication Date |
---|---|
GB250937A true GB250937A (en) | 1926-12-09 |
Family
ID=21814861
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9595/26A Expired GB250937A (en) | 1925-04-15 | 1926-04-12 | Improvements relating to electrical circuit-breakers |
Country Status (2)
Country | Link |
---|---|
US (1) | US1872382A (en) |
GB (1) | GB250937A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2436992A (en) * | 1944-06-16 | 1948-03-02 | Hpm Dev Corp | Solenoid with plunger |
BE472302A (en) * | 1946-04-19 | |||
NL8204110A (en) * | 1982-10-25 | 1984-05-16 | Hazemeijer Bv | Apparatus for moving an element between two end positions by means of an energy buffer. |
NL8300560A (en) * | 1983-02-15 | 1984-09-03 | Hazemeijer Bv | Apparatus for moving an element between two end positions by means of an energy buffer and holding the element in these end positions. |
-
1925
- 1925-04-15 US US23401A patent/US1872382A/en not_active Expired - Lifetime
-
1926
- 1926-04-12 GB GB9595/26A patent/GB250937A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US1872382A (en) | 1932-08-16 |
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