US2441412A - Circuit breaker control system - Google Patents

Circuit breaker control system Download PDF

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Publication number
US2441412A
US2441412A US553632A US55363244A US2441412A US 2441412 A US2441412 A US 2441412A US 553632 A US553632 A US 553632A US 55363244 A US55363244 A US 55363244A US 2441412 A US2441412 A US 2441412A
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US
United States
Prior art keywords
circuit breaker
power
release
switch blade
control system
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 - Lifetime
Application number
US553632A
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English (en)
Inventor
Haller Arnold
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.)
BBC Brown Boveri AG Germany
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US2441412A publication Critical patent/US2441412A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the control system of a pneumatically operated circuit breaker has to transmit switching orders of all kinds to the actuating elements of the moveable switch contacts.
  • the switching movements must always be clear and complete, quite independently of the fact whether the orders are short or long, contradict each other, occur in rapid succession, or are merely a repetition of some orders which have already been exeouted.
  • the object of the present invention is to provide a control system for a pneumatically operated electric circuit breaker where all the aforementioned conditions can be readily fulfilled. According to the invention this'is achieved due to the control valves both for the closing and opening order being actuated by power storage devices whose charging organs are controlled by the moveable contact of the circuit breaker.
  • FIG. 1 shows a circuit breaker, the pneumatic drive and control being shown in longitudinal section.
  • Fig. 2 shows the control system during the opening or. circuit-breaking process.
  • Fig. l The essential elements required for the control and switching operations of the circuit breaker are shown in Fig. l.
  • the moveable switch blade i of the circuit breaker is controlled in its end position in and out by supplying compressed air to one or the other side of the piston 2.
  • compressed air is supplied from container 3 over valve 4 or! and pipe 5 or '5 respectively to the working cylinder 6.
  • Valves 4, 4' which are moved by levers '1, 1 respectively are actuated by power storage devices which in this case consist of toggle levers 8, 8' and springs 9, 9.
  • Fig. 1 the circuit breaker is shown in the closed position.
  • the left-hand power storage device which serves to open the circuit breaker is thus held by catch H) in the extended position, whilst the right hand power storage device for the closing orders is kept extended by its holding catch Ill and furthermore by the charging cam II.
  • the left-hand storage device is also provided with a corresponding charging cam ,ll, both cams H, II being actuated from the switch blade I by way of shaft 12 and link I 3.
  • Holding catches III, III engage release catches l4 and I4 respectively, and Fig. 1 shows how commanding impulses are transmitted by various command elements so as to cause a vertical movement of these release catches I4, l4.
  • the commanding elements consist for instance of press-buttons l5 and i5 which are at the same time constructed as the cores of remote-controlled magnets l6 and iii, a second remote-controlled magnet l1 serving for switching-out purposes and a lowvoltage magnet it which causes an interruption when the coil is not excited, also being provldeda block is provided in the form of an over-current relay l9 which also actuates the release catch it by means of a link 20.
  • a rod 2i is provided which is actuated by lever 1 or I and causes the release catches Hand [4' respectively to disengage the holding catches I0, 10'.
  • Blocking rod 2i is also actuated by a pressure measuring device 22, which when the pressure in ccntainer 3 drops below a certain minimum value operates and also blocks the control.
  • the switching-in operation which can be initiated by the commanding elements I5 or IE only after the breaker has moved to full open position, the valve 4 has reclosed, and release catch l4 returned to engagement with its associated holding catch It by movement in the opposite direction of rod 2
  • a circuit interrupter the combination with a movable switch blade, a power cylinder and piston for moving said switch blade into and out of engagement with a cooperating switch element, a source of pressure gas, and independently operable valves for controlling communication between said pressure gas source and the respective ends of said power cylinder; of means including individual power devices for opening the respective valves, means mechanically connected to and operable with said switch blade for storing power in said power devices, and means selectively operable to release one or the other of said power devices for movement to open the associated valve, thereby to admit pressure gas to an end of said power cylinder for a movement of the switch blade in one direction.
  • said means for storing power in said power devices comprises means operable near the end of the movement of the switch blade in either direction by said piston to store power in the power device that was released to open the valve that initiated the piston movement.
  • said means for storing power in said power devices includes means operable when said switch blade is in either end position to prevent a release of the power device of the control valve that was last opened to effect movement of the switch blade into that end position.
  • valve controlling means comprising spring means for actuating the respective valves, means actuated by movement of the switch blade in one direction to stress the spring means of the valve that was opened to effect movement of the switch blade in that direction, means automatically latching the stressed spring means to prevent its operation of the associated valve, and means for unlatching said stressed spring means of the pair of valves.
  • said spring means comprise spring loaded toggle mechanisms; and said latching means comprises a holding catch for retaining the associated toggle mechanism in spring-stressed condition.
  • a circuit breaker including a power cylinder and a piston for actuating a movable contact into and out of engagement with a stationary contact, a source of pressure gas, valves controlling the flow of pressure gas to the opposite ends of said cylinder, power devices for opening the respective valves, means actuated in response to operation of the circuit breaker con tacts for storing power in said power devices, means selectively operable to release each of said power devices to open or close said contacts, and interlock means actuated upon release of one of said power devices to prevent release of the second power device prior to completion of the opening or closing operation of the circuit breaker contacts resulting from the release of said first ARNOLD HALLER.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US553632A 1943-09-11 1944-09-11 Circuit breaker control system Expired - Lifetime US2441412A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH581544X 1943-09-11

Publications (1)

Publication Number Publication Date
US2441412A true US2441412A (en) 1948-05-11

Family

ID=4521537

Family Applications (1)

Application Number Title Priority Date Filing Date
US553632A Expired - Lifetime US2441412A (en) 1943-09-11 1944-09-11 Circuit breaker control system

Country Status (5)

Country Link
US (1) US2441412A (enrdf_load_stackoverflow)
BE (1) BE459332A (enrdf_load_stackoverflow)
FR (1) FR910135A (enrdf_load_stackoverflow)
GB (1) GB581544A (enrdf_load_stackoverflow)
NL (1) NL60636C (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862476A (en) * 1954-02-17 1958-12-02 Asea Ab Oil pressure operating device for electric circuit breakers
US2909629A (en) * 1957-07-02 1959-10-20 Ite Circuit Breaker Ltd Motor spring operating mechanism for oil circuit breakers
US3043933A (en) * 1959-12-07 1962-07-10 Mc Graw Edison Co Polyphase circuit interrupters

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE952108C (de) * 1953-07-19 1956-11-08 Voigt & Haeffner Ag Druckgassteuerventil fuer die Betaetigung elektrischer Schaltgeraete

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US901967A (en) * 1904-11-07 1908-10-27 Gen Electric Oil-switch.
US2292096A (en) * 1940-02-06 1942-08-04 Gen Electric Circuit-breaker operating system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US901967A (en) * 1904-11-07 1908-10-27 Gen Electric Oil-switch.
US2292096A (en) * 1940-02-06 1942-08-04 Gen Electric Circuit-breaker operating system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862476A (en) * 1954-02-17 1958-12-02 Asea Ab Oil pressure operating device for electric circuit breakers
US2909629A (en) * 1957-07-02 1959-10-20 Ite Circuit Breaker Ltd Motor spring operating mechanism for oil circuit breakers
US3043933A (en) * 1959-12-07 1962-07-10 Mc Graw Edison Co Polyphase circuit interrupters

Also Published As

Publication number Publication date
BE459332A (enrdf_load_stackoverflow)
GB581544A (en) 1946-10-16
FR910135A (fr) 1946-05-28
NL60636C (enrdf_load_stackoverflow)

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