EP0070249A2 - Sectionneur - Google Patents

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Publication number
EP0070249A2
EP0070249A2 EP82730079A EP82730079A EP0070249A2 EP 0070249 A2 EP0070249 A2 EP 0070249A2 EP 82730079 A EP82730079 A EP 82730079A EP 82730079 A EP82730079 A EP 82730079A EP 0070249 A2 EP0070249 A2 EP 0070249A2
Authority
EP
European Patent Office
Prior art keywords
switching pin
scissor
socket
auxiliary
contact piece
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.)
Granted
Application number
EP82730079A
Other languages
German (de)
English (en)
Other versions
EP0070249A3 (en
EP0070249B1 (fr
Inventor
Dieter Dipl.-Ing. Lorenz
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0070249A2 publication Critical patent/EP0070249A2/fr
Publication of EP0070249A3 publication Critical patent/EP0070249A3/de
Application granted granted Critical
Publication of EP0070249B1 publication Critical patent/EP0070249B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/32—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact

Definitions

  • the invention relates to a disconnector with a fixed, tubular contact piece and a movable, tubular switching pin, which is guided in a fixed outer part and contains an auxiliary switching pin movable in relation to the switching pin, which can be connected to an auxiliary contact piece of the fixed contact piece.
  • a known disconnector of this type (Siemens operating instructions SW 8378 - 220 "3CB switch disconnector, 10 kV", pages 102/1 to 102/3) is designed as a switch disconnector and has an auxiliary switching pin so that an arc only occurs between a so-called sliding contact when it is switched off and a burn-off ring of the switching pin is formed because gas is split off from the insulating material of the fixed outer part by this arc, which escapes from the quenching pot with vigorous flow while deionizing the switching path.
  • the invention has for its object to propose a circuit breaker, which is also in a version for higher voltages and the large separation distances required has short lead times without requiring a particularly fast-working drive.
  • flashover is understood to mean the time during which an arc occurs between the fixed contact piece and the movable switching pin when switching on or off.
  • a support shaft is attached to the switching pin, on which at least one socket is arranged; on the outside of the circumference of the socket there is an end of a scissor-like connecting member, the other end of which is attached to the auxiliary switching pin, and on the outside of the circumference of the socket are elements of a mechanical control device which cause rotation of the socket when the switching pin is moved.
  • a major advantage of the circuit breaker according to the invention is that relatively short flashover times can be achieved both when switching on and when switching off, without the need for a special, relatively fast drive for the switching pin.
  • the need for a fast drive is achieved by a comparatively simple design of the isolating switch, in that it is provided with an auxiliary switching pin which is only mechanically connected to the switching pin via a scissor-like connecting element and a socket on a support shaft.
  • the elements of a mechanical control device ensure that by rotating the socket on the support shaft, the scissor-like connecting link is opened after a relatively short path of the switching pin, whereby the auxiliary switching pin comes into contact with the auxiliary contact piece of the fixed contact piece considerably earlier than the switching pin.
  • the support shaft with the at least one socket and also the scissor-like connecting element can be arranged on the outside of the switching pin.
  • the support axis and also the scissor-like connecting element are located inside the switching pin. In this case, no complex insulation measures and no openings and slots in the switching pin are required to establish the mechanical connection between the switching pin and the auxiliary switching pin guided inside.
  • the support axis and the scissor-type connecting element are inside or outside the switching pin, it is advantageous to create well-defined movement conditions if the scissor-type connecting element lies in a plane that is perpendicular to a plane formed by the center axes of the auxiliary switching pin and the supporting axis lies.
  • the mechanical control device and the elements attached to the circumference of the socket can be designed differently, provided that they only fulfill the task of causing a rotation of the socket to open the scissor-like connecting element when the switching pin is moved.
  • the elements of the control unit Direction two on the circumference of the socket offset from each other stop lever, which cooperate with the movement of the switching pin with two approaches of the outer part.
  • the two approaches in the vicinity of the support axis advantageously overlap over a predetermined distance and extend from this distance in each case in an axis-parallel direction.
  • the auxiliary switching pin initially moves at the same speed as the switching pin, because the scissor-like connecting member remains in its largely closed state, and that only after a predetermined path of the switching pin through the elements of the mechanical control device, a rotary movement of the socket and thus a opening of the scissor-like connecting element occurs, whereby the speed of movement of the auxiliary switching pin increases considerably and after a relatively short time a contact between the auxiliary switching pin and the auxiliary contact piece is effected long before the switching pin has reached the fixed contact piece.
  • the scissor-like connecting link can also be designed in different ways in the disconnector according to the invention. So it is considered advantageous if the scissor-like connecting element contains a scissor element which is guided axially in the switching pin. The axial guidance is absolutely necessary, because otherwise the opening and closing of the scissor element cannot be achieved when the bushing rotates.
  • the scissor-like connecting link can advantageously also be designed such that it consists of two scissor elements; A further bushing is then arranged on the supporting axis, and one scissor element is on the outside on the circumference of one bushing and the other scissor element is on the outside of the circumference of the another socket attached.
  • a switching pin 2 is mounted for longitudinal movement in a fixed outer part 1.
  • the switching pin 2 has a support axis 3, the central axis 4 of which extends through the longitudinal axis 5 of the switching pin 2.
  • a bushing 6 is rotatably arranged on the support shaft 3.
  • an end 7 of a scissor-like connecting member 8 is fastened, the other end 9 of which is connected to an auxiliary switching pin 10 which is mounted in the switching pin 2 so as to be longitudinally movable.
  • an element 11 designed as a stop lever and a further element 12 of a mechanical control device designed as another stop lever.
  • the two stop levers 11 and 12 are held offset from one another on the circumference of the bush 6.
  • the mechanical control device is completed by an extension 13 which extends in the direction of the arrow 14 to the point 15 of the outer part 1;
  • Another projection 16 extends in the direction of the arrow 17 and ends at the point 18.
  • the projections 13 and 1 6 overlap each other so in the area between the points 18 and 15 °.
  • the scissor-like connecting element 8 contains not only a scissor element 19 but also a further scissor element 20.
  • This further scissor element 20 is fastened with its one end 21 on the outside to the circumference of a further bushing 22. With its other end, it is just like the scissor element 19 connected to the auxiliary switching pin 10.
  • the two scissor elements 19 and 20 are connected to one another at bearing points 23 '.
  • the outer part 1 with. the switching pin 2 and the auxiliary switching pin 10 is opposite - in the figure only schematically shown - fixed contact piece 24, in which there is an auxiliary contact piece, not shown, for receiving the auxiliary switching pin 10.
  • the fixed outer part 1 and the fixed contact piece 24 are spaced apart from one another via a separating section T.
  • the disconnector is shown in its starting position, in which the disconnector is fully open.
  • the scissor-like connecting member 8 is largely closed.
  • One stop lever 11 extends freely downward, while the further stop lever 12 is supported on the shoulder 13 in the overlapping area between points 18 and 15.
  • the switching pin 2 is in this state within the fixed outer part 1; the auxiliary switching pin 10 is almost completely inside the switching pin 2.
  • the switching pin 2 If the switching pin 2 is moved by actuating a drive, not shown in the figure, in the direction of the fixed contact piece 24, then one stop lever 11 comes against the shoulder 16 at point 18, while the further stop lever 12 reaches point 15, where the shoulder 13 stops. Up to this position shown in the illustration 2, the auxiliary switching pin 10 is moved at the same speed as the switching pin 2; the scissor-like connecting member 8 remains in the largely closed state. If the switching pin 2 is moved further forwards and reaches the position shown in the illustration 3, then the bushing 6 on the support axis 3 in Swiveled in the direction of arrow 25, since one stop lever 11 now runs onto the projection 16. The further stop lever 12 is led down from the neck 13.
  • the scissor-like connecting member 8 When the bushing 6 rotates, the scissor-like connecting member 8 is opened because the end 7 is now guided from the outside to the central axis of the switching pin 2 or of the auxiliary switching pin 10.
  • the scissor element 19 took the angle cL to the center axis of the auxiliary switching pin 10 in the closed state (see illustration 2), the angle ⁇ is now enclosed by the scissor element and the center axis.
  • the opening of the scissor-like connecting element 8 leads to the auxiliary switching pin 10 covering a path s1 almost abruptly, which can be described by the following equation:
  • s2 describes the path that the support axis 3 or: the switching pin 2 travels during the rotational movement of the bush 3; this way is shown in the illustration 3.
  • r denotes the length of the section of the scissor elements 19 and 20 from the respective common bearing point 23 to the outside. The number of these sections is marked with n.
  • the representation 4 of the figure shows that after contact has been made between the auxiliary switching pin 10 and the auxiliary contact piece, the movement of switching pin 2 and auxiliary switching pin 10 is carried out at the same speed while covering the same distance, the auxiliary switching pin 10 penetrating even further into the auxiliary contact piece. In this way, the switching pin 2 finally comes into contact with the fixed contact piece 24, and the disconnector is closed.
  • the circuit breaker is opened in reverse order by first detaching the switching pin 2 together with the auxiliary switching pin 10 from the fixed contact piece 24, the auxiliary switching pin 10 remaining in contact with the auxiliary contact piece for a relatively long time. Only when the switching pin 2 has reached a position according to the illustration 3 in the course of the switching-off process, by turning back the socket 3, the scissor-like connecting link 8 is closed almost suddenly and the auxiliary switching pin 10 is torn from the auxiliary contact piece. In this state, the switching pin 2 is already so far away from the fixed contact piece 24 that a rollover can no longer occur. By way of a state such as that shown in illustration 2, switching element 2 finally returns to the initial state even when it is switched off, as shown in illustration 1 of the figure. «

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
EP82730079A 1981-07-10 1982-06-11 Sectionneur Expired EP0070249B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813127967 DE3127967A1 (de) 1981-07-10 1981-07-10 Trennschalter
DE3127967 1981-07-10

Publications (3)

Publication Number Publication Date
EP0070249A2 true EP0070249A2 (fr) 1983-01-19
EP0070249A3 EP0070249A3 (en) 1984-04-25
EP0070249B1 EP0070249B1 (fr) 1986-04-16

Family

ID=6136984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82730079A Expired EP0070249B1 (fr) 1981-07-10 1982-06-11 Sectionneur

Country Status (6)

Country Link
US (1) US4539449A (fr)
EP (1) EP0070249B1 (fr)
JP (1) JPS5818823A (fr)
CA (1) CA1227516A (fr)
DE (2) DE3127967A1 (fr)
SU (1) SU1199206A3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2759818B1 (fr) * 1997-02-20 1999-04-02 Gec Alsthom T & D Sa Systeme de commutation incluant un sectionneur d'injection de courant integre a un disjoncteur de generateur

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737556A (en) * 1951-04-27 1956-03-06 Westinghouse Electric Corp Circuit interrupter
US3348001A (en) * 1965-07-26 1967-10-17 Westinghouse Electric Corp Electric distribution system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1706782A (en) * 1924-03-17 1929-03-26 Gen Electric Electric switch
US3943314A (en) * 1974-05-14 1976-03-09 Westinghouse Electric Corporation Motion-multiplying linkage-mechanism for sealed-casing structures

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737556A (en) * 1951-04-27 1956-03-06 Westinghouse Electric Corp Circuit interrupter
US3348001A (en) * 1965-07-26 1967-10-17 Westinghouse Electric Corp Electric distribution system

Also Published As

Publication number Publication date
EP0070249A3 (en) 1984-04-25
DE3127967A1 (de) 1983-01-27
SU1199206A3 (ru) 1985-12-15
EP0070249B1 (fr) 1986-04-16
JPS5818823A (ja) 1983-02-03
US4539449A (en) 1985-09-03
CA1227516A (fr) 1987-09-29
DE3270585D1 (en) 1986-05-22

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