GB836403A - Improvements in and relating to circuit-breaker indicator systems - Google Patents

Improvements in and relating to circuit-breaker indicator systems

Info

Publication number
GB836403A
GB836403A GB2684355A GB2684355A GB836403A GB 836403 A GB836403 A GB 836403A GB 2684355 A GB2684355 A GB 2684355A GB 2684355 A GB2684355 A GB 2684355A GB 836403 A GB836403 A GB 836403A
Authority
GB
United Kingdom
Prior art keywords
circuit
switches
breakers
pressure
fixed contact
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
Application number
GB2684355A
Inventor
Percy Moreton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
English Electric Co Ltd
Original Assignee
English Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB2684355A priority Critical patent/GB836403A/en
Publication of GB836403A publication Critical patent/GB836403A/en
Expired legal-status Critical Current

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
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/40—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane
    • 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

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

836,403. Gas-blast switches; pneumatic action of switches; indicators for switches. ENGLISH ELECTRIC CO. Ltd. Sept. 14, 1956 [Sept. 20, 1955], No. 26843/55. Class 38 (5). In a switch-gear system comprising a plurality of gas-pressure-operated circuit-breakers 4 ... 6 arranged for simultaneous operation, an indicating arrangement is responsive to the individual pressures which operate each circuitbreaker, the indicating arrangement detecting when a time-lag between the instants of application of the pressures is longer than a predetermined period. In Fig. 1 air blasts are applied to the circuit-breakers 4 ... 6 through pipes 7 ... 9 which also supply pressure-operated micro-switches 10 ... 12. If pressure is not applied to the pipes at the same instant and the time-lag is sufficient, then one of the microswitches will have its movable contact in engagement with a fixed contact 10a, 11a or 12a, whilst another will have its movable contact in engagement with a fixed contact 10b, 11b or 12b so completing a circuit for a relay 14 which closes its contacts 18 to complete a circuit for an indicator 19. Auxiliary switches 15 . . . 17 open with the circuit-breakers to prevent incorrect operation of the indicator should there be a difference in the resetting times of the micro-switches when the application of the air-pressure ceases. The circuit-breakers may be provided with the pneumatic retaining and interlocking coupling of Specification 818,521, Fig. 2 (not shown), each micro-switch 37, Fig. 3b, being connected to the valve assembly of the associated circuit-breaker by means of connectors 45, 42. When a blast of air occurs in the valve assembly, air forced through the connectors acts on the central limb 49 of a trifurcated blade spring 46 and forces the blade spring to move from the position shown in which a moving contact carried by the spring 46 engages a fixed contact 48, into a position in which the moving contact engages a fixed contact 50. The switch 37 resets when the blast pressure subsides.
GB2684355A 1955-09-20 1955-09-20 Improvements in and relating to circuit-breaker indicator systems Expired GB836403A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2684355A GB836403A (en) 1955-09-20 1955-09-20 Improvements in and relating to circuit-breaker indicator systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2684355A GB836403A (en) 1955-09-20 1955-09-20 Improvements in and relating to circuit-breaker indicator systems

Publications (1)

Publication Number Publication Date
GB836403A true GB836403A (en) 1960-06-01

Family

ID=10250137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2684355A Expired GB836403A (en) 1955-09-20 1955-09-20 Improvements in and relating to circuit-breaker indicator systems

Country Status (1)

Country Link
GB (1) GB836403A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131614A (en) * 1982-11-22 1984-06-20 Gen Electric Co Plc Electrical switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131614A (en) * 1982-11-22 1984-06-20 Gen Electric Co Plc Electrical switch

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