US3825708A - Method and means for breaking a high-power circuit - Google Patents

Method and means for breaking a high-power circuit Download PDF

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Publication number
US3825708A
US3825708A US00241662A US24166272A US3825708A US 3825708 A US3825708 A US 3825708A US 00241662 A US00241662 A US 00241662A US 24166272 A US24166272 A US 24166272A US 3825708 A US3825708 A US 3825708A
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US
United States
Prior art keywords
breaking
group
current
contact
members
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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
US00241662A
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English (en)
Inventor
K Bergman
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.)
Kafak AB
Original Assignee
Kafak AB
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
Priority claimed from SE451071A external-priority patent/SE383578B/xx
Priority to DE19722216447 priority Critical patent/DE2216447B2/de
Priority to FR7213664A priority patent/FR2132905A1/fr
Priority to CH498672A priority patent/CH547543A/xx
Application filed by Kafak AB filed Critical Kafak AB
Priority to US00241662A priority patent/US3825708A/en
Priority to GB1579872A priority patent/GB1391981A/en
Application granted granted Critical
Publication of US3825708A publication Critical patent/US3825708A/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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/10—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor in which the servomotor position is a function of the pressure also pressure regulators as operating means for such systems, the device itself may be a position indicating system

Definitions

  • a method of breaking a high-power current passing through a switch is characterized by transferring the 200/146 i figg current to a contact member which is then opened.
  • the switch includes two groups of stationary contact [58] Field of Search 200/ 14 6 R, 153 L members and a movable Contact member, Cams being [56] References Cited provided to vary the opening and closing positions of the groups.
  • the invention relates to a method of breaking a'high power circuit and a circuit breaker used to carry out this method.
  • the circuit breaker includes two spaced stationary contact members and a movable contact which engages one contact member and which is adapted to engage the other contact member when the device is closed and to move away from it when the device is opened.
  • FIG. 1 is a diagrammatic view of a current breaker of the present invention.
  • FIGS. 2, 3 and 4 show the same current breaker in three following phases.
  • Group A which includes the contact members 10,14, 18 and 20 constitutes the main contact arrangement and its members do not have any breaking functions.
  • group B stationary contact members 12 and 16 cooperatewith swingable contact members 22 and 24.
  • the contact members 16, 22 and 24 serve as breaking contact members and their upper ends having cross sections decreasing from the breaking point so that the end surfaces are directed away from each other. This facilitates quenching of the arcs between the stationary contact member and the movable contact members.
  • Group B which includes contact members 12, 16, 22 and 24 constitutes the breaking contact arrangement which cooperates with the main contact arrangement of group A.
  • contact groups A and B have been shown side by side in FIGS. 1 to 4. However, actually they are located one behind the other, as shown in FIG. 5 and have a common axis 26 (FIG. 1).
  • a rotatable cam member 28 of group A' cooperates with the movable contact members 18 and 20, which the rotatable cam member 30 of group B cooperates with movable contact members 22 and 24.
  • the two cam members 28 and 30 are mounted on a common axle 32 (FIG. 5).
  • a spring 34 engages the contact members 18 and 20 and tends to press them against the stationary contact member 14 and the cam member 28.
  • a similar spring 36 engages the contact members 22 and 24 and tends to press them against the stationary contact member 16 and the cam member 30.
  • the axle 32 carrying the cam members 28 and 30 can be rotated manually, by magnetic means or by a motor in the direction of the arrow 38 (FIG. 1).
  • Group A which is the main contact arrangement and group B which is the breaking contact arrangement constitute jointly a single current breaker the different coupling positions of which are shown in FIGS. 1 to 4.
  • FIG. 1 shows the rest position, namely, when the current breaker is closed. Then the main current arrangement A is closed while the breaking current arrangement B is open and thus does not carry any current. Then the main current arrangement A will be subjected to a certain amount of heating due to the flow of the permanent current while the breaking contact arrangement will remain cold.
  • the axle 32 is turned with a specific speed to the extent of 90 degrees.
  • the parts of the current breaker undergo consecutively phases which are shown in FIGS. 2 to 4.
  • the beginning of the turning movement namely, when the axle 32 has been turned approximately to the extent of 15, the position shown in have no opening spaces.
  • the last phase namely,
  • the are arising during the opening of the breaking contact arrangement is driven upwardly and out of the gap between the contact member 16 and the movable contact members 22 and 24.
  • the lengthening of the arc path by the aid of the electrodynamical power development of the current is utilized.
  • This self-quenching effect should not be influenced, however, in a detrimental way by blowing coils or electromagnetic coils and no ferro-magnetic material should be present in the surroundings of the arc.
  • the quenching effect is further promoted by arranging a breaker chamber 40 (FIG. only around the breaking contact arrangement B.
  • the chamber 40 contains plate laminae which have a cooling effect upon the ionized gases of the arc.
  • a current breaker had contact surfaces which were both current carrying when the current breaker was closed and circuit breaking during the breaking process.
  • An important advantage of the circuit breaker of the present invention is that it includes members which are used and dimensioned merely for carrying the current and do not participate in the breaking process. Contact transition surfaces can consist of a material which conducts current in the best possible way, such as copper or silver. Some members are dimensioned for current carrying and high current load taking place for a very short time (the entire load time approximately ranging between ms and ms) without regard to the resistivity of the material.
  • the stationary contact members 10, 12 and 14, 16 respectively are interconnected by bar parts 42 and 44 to provide a coupling parallel to the main contact arrangement A and breaking contact arrangement B.
  • FIG. 6 shows diagrammatically the connections of the contacts of FIGS. 1 to 5.
  • FIG. 7 and 8 show another embodiment of the circuit breaker of the present invention which has two main contact'arrangements A coupled in parallel with each other and also with a breaking group also consisting of two breaking contact arrangements B coupled in series.
  • a main contact arrangementA (similar to that of FIG. 5) consists of contact numbers l0, l8 and 14 and is coupled in parallel with another main contact unit having contact members 46, 48 and 50, so as to increase the nominal power of the current breaker. Obviously, a further increase in the breaking effect can be attached by coupling a plurality of units in parallel.
  • FIG. 7 shows breaking chambers 40 and 52 of the two breaking contact units B.
  • the cam axle 32 is driven by a driving member 60 which may consist of an electromagnetic mechanism or an electric motor provided with a speed control so as to produce a regulated breaking process of the movable breaking contact members, such as the members 22 and 24. Since small mechanical powers, are used to drive the cam axle, the circuit breaker can be actuated in a simple manner, as compared to actuating appliances of existing high power current breakers.
  • a driving member 60 which may consist of an electromagnetic mechanism or an electric motor provided with a speed control so as to produce a regulated breaking process of the movable breaking contact members, such as the members 22 and 24. Since small mechanical powers, are used to drive the cam axle, the circuit breaker can be actuated in a simple manner, as compared to actuating appliances of existing high power current breakers.
  • the circuit breaker of FIGS. 7 and 8 is provided with a resistance 54 inserted into the series coupled breaking contact branch B.
  • the member 54 may be also a capacitor.
  • the current which is to be broken passes from the stationary terminal contact member 14 through the current bar 56, the resistance 54, the contact unit within the chamber 52, the current bar 58, the contact member within the chamber 40 and to the stationary contact member 10. It is apparent that the resistance 54 can be inserted between the contact units in the two chambers 40 and 52, instead of being coupled with the current bar 58.
  • higher nominal voltages for example, voltages up to 20 Kv
  • more than two breaking contact units B are used which are coupled in series, each connecting line between two breaking contact units being provided with a resistance 54.
  • a device for breaking a high power current comprising a switch dimensioned for permanent current carrying, a breaking contact member dimensioned solely for current breaking, a rotary axle, cam members carried by said axle and connected with said switch and said member, means actuating said axle and said cams for transferring the current flowing through said switch to said member and immediately thereafter actuating said member to open it and break the current, wherein said switch and said member consist of similar groups of contact members, each group comprising two two spaced stationary contact members and a movable contact member engaging one stationary contact member and adapted to move in and out of engagement with the other stationary contact member, and means interconnecting said groups in parallel, said cam members being adapted to hold one group in a closing position and the other group in the open position during the inia capacitor connected in series with said other group. 4. A device in accordance with claim 1, wherein said other group comprises a plurality of contact members connected in series.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
US00241662A 1971-04-07 1972-04-06 Method and means for breaking a high-power circuit Expired - Lifetime US3825708A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19722216447 DE2216447B2 (de) 1971-04-07 1972-04-05 Hochleistungsschalter
FR7213664A FR2132905A1 (enrdf_load_stackoverflow) 1971-04-07 1972-04-05
CH498672A CH547543A (de) 1971-04-07 1972-04-05 Verfahren zur leistungsunterbrechung eines stromes mittels eines lasttrennschalters.
US00241662A US3825708A (en) 1971-04-07 1972-04-06 Method and means for breaking a high-power circuit
GB1579872A GB1391981A (en) 1971-04-07 1972-04-06 Method for breaking a high-power current as well as a circuit- breaker for performing the method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE451071A SE383578B (sv) 1971-04-07 1971-04-07 Sett att bryta hogeffektstrom med hjelp av tva elektriskt parallellkopplade stromstellare samt anordning for genomforande av nemnda sett
US00241662A US3825708A (en) 1971-04-07 1972-04-06 Method and means for breaking a high-power circuit

Publications (1)

Publication Number Publication Date
US3825708A true US3825708A (en) 1974-07-23

Family

ID=26654532

Family Applications (1)

Application Number Title Priority Date Filing Date
US00241662A Expired - Lifetime US3825708A (en) 1971-04-07 1972-04-06 Method and means for breaking a high-power circuit

Country Status (5)

Country Link
US (1) US3825708A (enrdf_load_stackoverflow)
CH (1) CH547543A (enrdf_load_stackoverflow)
DE (1) DE2216447B2 (enrdf_load_stackoverflow)
FR (1) FR2132905A1 (enrdf_load_stackoverflow)
GB (1) GB1391981A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4752659A (en) * 1986-03-25 1988-06-21 Northern Engineering Industries Plc Arc interrupter
WO1989006043A1 (en) * 1987-12-18 1989-06-29 Elin-Union Aktiengesellschaft Für Elektrische Indu Circuit arrangement for switching current to a thyristor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4383150A (en) 1978-09-12 1983-05-10 Westinghouse Electric Corp. Circuit-interrupters having shunting capacitance around the separable power contacts with capacitance disconnecting means therefor
US4438302A (en) * 1982-02-17 1984-03-20 Westinghouse Electric Corp. Electrical shorting switch assembly including a last to open last to close arcing switch

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US839636A (en) * 1906-02-20 1906-12-25 Peter Peters Electric cut-out switch.
US1029974A (en) * 1911-12-22 1912-06-18 Sears B Condit Jr Controlling means for electric circuits.
US3462563A (en) * 1968-01-08 1969-08-19 Superior Electric Co Tap changing mechanism with scotch yoke actuator
US3649790A (en) * 1969-10-31 1972-03-14 Bbc Brown Boveri & Cie Gas-blast circuit breaker with double-nozzle contact system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US839636A (en) * 1906-02-20 1906-12-25 Peter Peters Electric cut-out switch.
US1029974A (en) * 1911-12-22 1912-06-18 Sears B Condit Jr Controlling means for electric circuits.
US3462563A (en) * 1968-01-08 1969-08-19 Superior Electric Co Tap changing mechanism with scotch yoke actuator
US3649790A (en) * 1969-10-31 1972-03-14 Bbc Brown Boveri & Cie Gas-blast circuit breaker with double-nozzle contact system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4752659A (en) * 1986-03-25 1988-06-21 Northern Engineering Industries Plc Arc interrupter
WO1989006043A1 (en) * 1987-12-18 1989-06-29 Elin-Union Aktiengesellschaft Für Elektrische Indu Circuit arrangement for switching current to a thyristor

Also Published As

Publication number Publication date
FR2132905A1 (enrdf_load_stackoverflow) 1972-11-24
DE2216447B2 (de) 1976-01-22
CH547543A (de) 1974-03-29
DE2216447A1 (de) 1972-10-19
GB1391981A (en) 1975-04-23

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