EP0156171B1 - Système de contre-contact pour un sectionneur pantographe - Google Patents

Système de contre-contact pour un sectionneur pantographe Download PDF

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Publication number
EP0156171B1
EP0156171B1 EP85102073A EP85102073A EP0156171B1 EP 0156171 B1 EP0156171 B1 EP 0156171B1 EP 85102073 A EP85102073 A EP 85102073A EP 85102073 A EP85102073 A EP 85102073A EP 0156171 B1 EP0156171 B1 EP 0156171B1
Authority
EP
European Patent Office
Prior art keywords
contact
counter
switching
pantograph
contact 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
Application number
EP85102073A
Other languages
German (de)
English (en)
Other versions
EP0156171A3 (en
EP0156171A2 (fr
Inventor
Manfred Ing.-Grad. Jahn
Burkhard Dipl.-Ing. Krampe
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
Asea Brown Boveri AG Germany
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 Asea Brown Boveri AG Germany filed Critical Asea Brown Boveri AG Germany
Priority to AT85102073T priority Critical patent/ATE38585T1/de
Publication of EP0156171A2 publication Critical patent/EP0156171A2/fr
Publication of EP0156171A3 publication Critical patent/EP0156171A3/de
Application granted granted Critical
Publication of EP0156171B1 publication Critical patent/EP0156171B1/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
    • H01H31/34—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact adapted to engage an overhead transmission line, e.g. for branching
    • H01H31/36—Contact moved by pantograph
    • 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
    • H01H9/14—Adaptation for built-in safety spark gaps
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts

Definitions

  • the invention relates to a counter-contact system according to the preamble of claim 1 and is based on EP-A-0 110 005, which belongs to the prior art according to Art. 54 (3) EPC.
  • a mating contact system of the type mentioned at the outset has become known, in which a main mating contact is assigned to two auxiliary rails which are connected to snap contact elements, each of which is assigned an arc extinguishing system.
  • the operation of this arrangement is such that the auxiliary rails run a short distance after the scissor contact tubes during a switch-off process; during the time in which the scissor contact tubes are still connected to the auxiliary rails, the snap contacts, controlled by the auxiliary rails, are switched off, so that potential differences between the mating contact tube and the scissor contacts are switched off. This ensures that on the one hand the counter contact and on the other hand the auxiliary contact rails do not have to lead to arcing points.
  • the object of the invention is to further improve the mating contact system of the type mentioned at the outset and to prevent damage due to rollovers from occurring.
  • the component can be designed as an ohmic resistor. This is then to be dimensioned such that a maximum current can flow between the auxiliary rail and the scissor contact, which does not damage the auxiliary rail and the scissor contacts.
  • the resistance must be dimensioned in such a way that the energy conversion in the resistor caused by capacitive displacement currents does not destroy it.
  • a surge arrester can be provided as a component or as a component, which in a particularly preferred embodiment is designed as an encapsulated spark gap.
  • a varistor due to the relatively low thermal load capacity of the varistor, a radio link is cheaper in any case.
  • a mating contact 112 to 118 which interacts with two contact tubes 68/70 of a scissor-type circuit breaker, carries a housing 170 at both ends, which are composed of a housing support part 171 and a cover 172.
  • the housing 170 arranged on the left on the mating contact 112 to 118 will be considered.
  • At the right end of the mating contact 112 to 118 there is another housing which is mirror-inverted.
  • the housing support part 171 holds, in a manner not shown in detail, a support plate 173, on which an arc-quenching plate packet 174 is fastened.
  • the housing 170 has an opening 175 in its central region, in which a sliding seal 176 in the form of a sliding bushing is arranged, which surrounds the mating contact 112 to 118.
  • the housing support part which is made of cast aluminum, has on its outer surface parallel to the mating contact and at an equal distance from the center line or center axis of the opening 175 extensions 177 and 178, on which fixing strips 179 and 180 are fastened by means of screw connection 181.
  • the fixing strip 179 lies outside the projection and at a defined distance from the counter contact 112-118, whereas the fixing strip 180 is arranged between the projection 178 and the outer contour of the counter contact 112-118.
  • a spacer bar 182 is arranged between the upper fixing bar 179 and the mating contact 112 to 118. This can be seen more clearly from FIG. 3.
  • the counter contact 112 to 118 are assigned two contact strips 183 and 184, which have a steel rod 185 and a copper tube 188 surrounding the steel rod 185 (see FIG. 3).
  • the contact strips 183 and 184 are fastened to levers 188 and 189 at one end by means of screw connections 187; the other end of the levers 188 and 189 is attached to a pin 190 and 191 by means of a clamping part 192 and 193, respectively.
  • the distance of the fixing strip 179 from the upper surface line of the mating contact 112 to 118 is selected such that the contact strips 183 and 184 can lie between the fixing strip 179 and the mating contact, so that when the scissor contact 68 comes to rest against the mating contact 112-118, the contact strips 183 and 184, which are also referred to as auxiliary rails 183 and 184, cannot hinder the contact of the scissor contacts 68 with the mating contact 112-118. Accordingly, the width b of the fixing strips 179 and 180 is smaller than the diameter of the counter contact 112-118.
  • the lever 189 and the pin 191 can be seen partially cut.
  • This pin 191 penetrates a bore 194 in the housing support part 171, which bore is delimited by an inwardly facing collar 195.
  • the bore 194 receives seals 196 and 197 at its two ends, which serve at the same time for guiding, storing and sealing the pin 191 in the housing support part 171.
  • the inner end of the pin 191 is fixedly connected to a fork lever 198 and also to a clamping part 199.
  • the fork lever 198 extends approximately to the counter contact 112-118.
  • a connecting rod 201 is articulated via an axle 200, the other end of which is articulated to the contact tab 142 via an axle 202.
  • the fork lever 198 has a fork-like extension 203, in which one end of the connecting rod 201 engages and is guided therein.
  • a rotation of the lever 189 causes a rotation of the fork lever 198 via the pin 191 and thus an actuation of the contact lug 142 via the connecting rod 201.
  • An arc-quenching plate packet 219 can be seen inside the housing 170, which is delimited at the upper end by an arc-guiding rail 204 which carries a fixed contact 205.
  • a movable contact piece 146 is provided, which is attached to a contact lug 142, which is fastened in isolation to a stop 206 fixed to the housing by means of a screw connection 207.
  • a fastening element 210 is fastened by means of two screw connections 209, on which a leg end 211 of a U-shaped bow spring 212 is supported.
  • the other leg end 213 of the bow spring 212 is mounted on the contact lug 142, so that a snap mechanism is formed by the suitable support of the two leg ends of the spring 212, one stable position of which is the switch-on position and the other stable position of which is the switch-off position.
  • the position shown in Fig. 2 corresponds approximately to the so-called dead center position.
  • the arc guide rail 204 with the fixed contact piece 205 is fixedly connected to a carrier lug 214, which is likewise held on a stop 215 fixed to the housing by means of a screw connection 216 in isolation from the housing carrier part 171.
  • the arc quenching plate pack is delimited on one side by the arc guide rail 204 and at the other end by another arc guide rail 217.
  • This other guide rail 217 continues in the direction of the movable contact piece or fixed contact piece into an arcing horn 218, against which the movable contact piece 146 or the contact tab 142 comes to rest in the switched-off state.
  • the fixed contact piece or its feed and the contact tab form a U-shaped blow loop, which is oriented perpendicular to the extension of the quenching plates 219 of the arc quenching plate package 174. This results in an optimal entry of the arc drawn between the two contact pieces into the arc quenching plate packet 174 due to the magnetic field generated by the U-shaped blow loop.
  • the fixed contact piece 205 is connected to the mating contact via a wire 220, whereas the movable contact piece or the contact lug is electrically-galvanically connected to a wire 221 on the fork lever 198 and to another wire 222 on the horn 218.
  • the fork levers 198 are made of metal and the pin or the axis 191 is mounted insulated from the housing support part 171 due to the seals 196/197, which serve as insulating bushes.
  • the connecting rod 201 is also made of insulating material. In the same way, the fixing strips and the spacer or the spacer strip are also made of insulating material.
  • FIG. 2 it is shown in broken lines in section that the counter-contact 112 to 118 has on its upper side a broken line 230, into which a ball 231 is pressed by means of a spring 232, the spring 232 coming into contact with its free end a fixed stop 233 supports.
  • This arrangement serves as a catch for the counter-contact 112 to 118 or as a catch of the housing 170 with respect to the counter-contact, whereby the starting position is ensured when the switching device is switched off.
  • a catch can be formed in the usual way; it is only shown schematically in FIG. 2 by the groove 230, the ball 231 and the spring 232.
  • a spark gap 300 is connected between the mating or main contact 112/118 and the fork lever 198, one connecting line 301 of which is clamped to the main contact 112/118 and the other connecting line 302 of which is clamped to the axis 200.
  • the spark gap 300 is fastened to the support plate 173 by means of a connecting clamp 303 by means of screw connections 304.
  • a commercially available noble gas-filled surge arrester can be used as such a spark gap 300.
  • the potential difference is determined by the voltage drop across the resistor; this potential difference then causes no more flashovers at the insulating material bushings.
  • the resistor is also attached to the support plate 173, expediently using a Z-shaped attachment bracket (not shown in more detail).
  • the invention has been explained with reference to the tear-off contacts of EP-A-0 110 005.
  • the invention can also be used in other configurations, that is to say where partial areas are at a so-called “free potential” due to a switching contact.
  • the free potential is exactly on the area between the tear-off contacts 205/146 and the auxiliary rails 184/183.
  • Such break contacts can of course also be formed differently, for. B. in the form of resilient arcing horns, which - controlled by auxiliary rails - open before the scissor contacts have separated from the auxiliary rails.
  • the free potential is also available here.

Landscapes

  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Claims (5)

1. Système de contre-contact pour sectionneur à pantographe, avec, sur le contre-contact (112-118), des barres auxiliaires (183, 184) qui, dans un processus de coupure, poursuivent sur une distance de coupure définie les tubes de contact pantographiques (68/70) et avec des contacts de rupture (146, 205) à dispositif d'extinction d'arc (174) associé qui, commandés par le mouvement des barres auxiliaires (183, 184), débranchent une différence de potentiel entre le contre-contact et les tubes de contact pantographiques lors du processus de coupure ou lors de processus de rebondissement à la mise en circuit en sorte que la production d'un arc électrique entre les tubes de contact pantographiques (68/70) et le contre-contact (112-118) soit empêchée, caractérisé par le fait que les contacts de rupture (146, 205) sont pontés par un trajet de dérivation (300, 301, 302) dans lequel est inséré au moins un élément électrique particulier (300) formant un trajet de courant défini au moins pour des courants de déplacement apparaissant lors d'un processus de commutation.
2. Système de contre-contact selon la revendication 1 caractérisé par le fait qu'il comporte, comme élément électrique particulier, une résistance ohmique qui est calculée en sorte qu'un courant maximal déterminé ne soit pas dépassé lors 'd'un processus dé commutation.
3. Système de contre-contact selon la revendication 1 caractérisé par le fait que l'élément électrique particulier est un dérivateur de surtensions (300).
4. Système de contre-contact selon la revendication 3 caractérisé par le fait que-le dérivateur de surtensions (300) est un éclateur à. étincelles encapsulé.
5. Système de contre-contact selon la revendication 3 caractérisé par le fait que l'élément électrique particulier est une varistance.
EP85102073A 1984-03-29 1985-02-26 Système de contre-contact pour un sectionneur pantographe Expired EP0156171B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85102073T ATE38585T1 (de) 1984-03-29 1985-02-26 Gegenkontaktsystem fuer einen scherentrenner.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843411587 DE3411587A1 (de) 1984-03-29 1984-03-29 Gegenkontaktsystem fuer einen scherentrenner
DE3411587 1984-03-29

Publications (3)

Publication Number Publication Date
EP0156171A2 EP0156171A2 (fr) 1985-10-02
EP0156171A3 EP0156171A3 (en) 1986-06-25
EP0156171B1 true EP0156171B1 (fr) 1988-11-09

Family

ID=6231965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102073A Expired EP0156171B1 (fr) 1984-03-29 1985-02-26 Système de contre-contact pour un sectionneur pantographe

Country Status (4)

Country Link
EP (1) EP0156171B1 (fr)
AT (1) ATE38585T1 (fr)
DE (2) DE3411587A1 (fr)
ES (1) ES285690Y (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1800290U (de) * 1957-09-20 1959-11-19 Siemens Schukkertwerke Ag Hochspannungstrennschalter.
CH425943A (de) * 1965-08-12 1966-12-15 Bbc Brown Boveri & Cie Trenner mit Widerstand
DE3224712A1 (de) * 1982-07-02 1984-01-19 Brown, Boveri & Cie Ag, 6800 Mannheim Schaltanlage

Also Published As

Publication number Publication date
ES285690U (es) 1985-11-01
ATE38585T1 (de) 1988-11-15
EP0156171A3 (en) 1986-06-25
ES285690Y (es) 1986-05-16
EP0156171A2 (fr) 1985-10-02
DE3411587A1 (de) 1985-10-17
DE3566191D1 (en) 1988-12-15

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