EP0062603A1 - Lasttrennschalter mit einem schwenkbaren Schaltarm und mit einer Löscheinrichtung - Google Patents

Lasttrennschalter mit einem schwenkbaren Schaltarm und mit einer Löscheinrichtung Download PDF

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Publication number
EP0062603A1
EP0062603A1 EP82730037A EP82730037A EP0062603A1 EP 0062603 A1 EP0062603 A1 EP 0062603A1 EP 82730037 A EP82730037 A EP 82730037A EP 82730037 A EP82730037 A EP 82730037A EP 0062603 A1 EP0062603 A1 EP 0062603A1
Authority
EP
European Patent Office
Prior art keywords
driver
switch
slot
switching
locking head
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.)
Withdrawn
Application number
EP82730037A
Other languages
German (de)
English (en)
French (fr)
Inventor
Paul Küenzle
Jürgen Krysiak
Hans-Karl Reuter
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 EP0062603A1 publication Critical patent/EP0062603A1/de
Withdrawn legal-status Critical Current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
    • H01H33/121—Load break switches
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • H01H33/126—Load break switches comprising a separate circuit breaker being operated by the distal end of a sectionalising contact arm

Definitions

  • the invention relates to a load-break switch for the medium-voltage range with a fixed and a movable contact piece and with a switch arm that supports it and can be pivoted about a switch shaft, which is conductively connected to a stationary connection device by a flexible current band, and also with one when the switch arm is pivoted extinguishing device for load currents which can be actuated in the off position.
  • a switch disconnector of this type has become known, for example, from DE-AS 2 711 342.
  • the extinguishing device is curved in a circular arc. A part of it is located on the switching arm, while another part is attached to the post insulator, which also carries the fixed contact piece.
  • the invention has for its object to design the switch disconnector so that despite the pivoting movement of the switching arm a linear extinguishing device can be used, as it is known for example from DE-OS 2 907 574. This is designed as a coherent unit, in contrast to divided extinguishing devices according to DE-PS 946 638 or the already mentioned DE-AS 2 711 342.
  • a switch disconnector of the type mentioned in that the extinguishing device device as a unit is fixedly arranged near the fixed contact, as a power supply and actuating element has a linearly displaceably guided switching pin with a locking head located at its outer end and that the switching arm carries a link-like driver that can be coupled or uncoupled depending on its angular position with the locking head.
  • the switching arm carries a link-like driver that can be coupled or uncoupled depending on its angular position with the locking head.
  • the locking head moves during the pivoting movement, so that the switching pin can carry out a straight line movement.
  • the driver can have a slot which can be resiliently widened for the passage of the latching head and an extension for the passage of the latching head close to the end corresponding to the switch-off position.
  • the driver is pressed over the locking head when the switching arm reaches the switch-on position. Due to the position of the extension in the course of the slot, it is in your hand to effect the release of the switching pin at a very precisely determinable angular position of the switching arm.
  • a certain suspension or resilience of the driver against widening is desired for the coupling of the driver to the locking head when switching on. To a certain extent, this can be achieved regardless of the external dimensions of the driver and of the material thereof through an opening which is arranged at the end of the slot opposite the extension. This reduces the cross section of the driver and, depending on its size, leads to a certain spring constant.
  • the slot is delimited by inclined flanks. This makes it a funnel effect aims through which the locking head is guided to the center of the slot, and also a certain leverage effect on the expansion of the slot.
  • the driver is used both for the mechanical coupling with the switching pin and for the current transmission during the load shutdown.
  • the current transfer can be improved by at least one resilient contact element which is arranged approximately parallel to the slot on the side of the driver facing the switching pin of the extinguishing device.
  • Fig. 1 shows a switch disconnector according to the invention in a side view.
  • the switch disconnector shown in FIG. 1 is shown in plan view in FIG. 2.
  • a driver is shown as an individual part in FIG. 3 in a perspective view.
  • FIG. 4 Another embodiment of a driver is shown in a front view in FIG. 4.
  • the switch disconnector 1 shown in FIGS. 1 and 2 is intended for use at medium operating voltages. It has a frame 2 which consists of two lateral cheeks 3 and 4 and two profile rails 5 and 6 connecting these cheeks. Support insulators 7 are fastened next to one another on the profile rail 5, each of which carries a connection device 11 which also serves as a holder of a flexible current strip 10.
  • the current band 10 establishes the connection of the connection device 11 with a switching arm 12 in each current path, which consists of a support insulator 13 and a contact device attached to its head, which comprises a knife contact piece 14 and a current-carrying driver 15.
  • the support insulators 13 of the three adjacent current paths are fastened to a switch shaft 16 which is rotatably mounted in the cheeks 3 and 4 of the frame 2.
  • Each current path also includes a fixed contact piece formed from resilient contact lamellae 18 and an extinguishing device 17 which is arranged on a carrier 20 together with the contact lamellae 18.
  • the quenching device 17 is an independently functional unit with a switching pin 24, via which the current flows inside the quenching device until it is interrupted.
  • the extinguishing device can have a structure according to the application filed on the same day with the designation "switch disconnector with isolating contacts and with an extinguishing device", file number P 31 .
  • the carrier is mounted on a support insulator 21 which is fastened on the profile rail 6 of the frame 2.
  • the load-break switch 1 is switched on by pivoting the switching arms 12 by means of the switch shaft 16 in a clockwise direction.
  • the knife contact 14 comes between the contact lamellae 18, while on the other hand the driver 15 comes into engagement with a locking head 23, which comes at the outer end of the switching pin 24 of the extinguishing device 17.
  • An actuating shaft 25, which is also mounted in the cheeks 3 and 4 of the frame 2, is used to turn the switch shaft 16 in connection with a set of closing springs 26 and opening springs 27 as well as a pawl arrangement 28.
  • the springs are attached to a cross member 30 and 31, respectively, and are can be tensioned by a guide rod 32 or 33, which can be displaced in openings in the profiled rail 5 are stored.
  • the opposite ends of the switch-on springs 26 engage a crank arm seated on the switch shaft 16, while the switch-off springs 27 can act on a drive lever 34 seated on the switch shaft 16 by a drive pin located in the guide rod 33.
  • Tension levers 35 and 36 of the actuating shaft 25 allow the springs 26 and 27 to be tensioned simultaneously.
  • the switching arm 12 executes a pivoting movement when switched on and off, in which the knife contact piece 14 and the driver 15 move on the circular arc 40 entered in FIG. 1.
  • the switching pin 24 of the extinguishing device 17 can be moved in a straight line along the straight line 41 likewise entered in FIG. 1.
  • the driver 15 is designed so that it allows the shifting of the switching pin 24 or its locking head 23 relative to the switching arm 12.
  • the driver 15 is arranged on the support insulator 13 in such a way and is dimensioned such that the circular arc 40 and the straight line 41 run through it at every point on the swivel path of the switching arm 12. Details of the driver 15 are explained below with reference to FIG. 3.
  • the driver 15 has approximately the shape of a U-shaped bracket with an unequal length of its legs. It consists of a conductive material and can with regard to the desired strength z. B. made of sheet steel.
  • the shorter leg 42 of the driver 15 is provided with an opening 43 for connection to the current band 10.
  • a slot 46 extends essentially over the remaining length and is delimited by flanks 47 which are inclined inwards.
  • the width of the slot 46 corresponds to the diameter of the neck 29 of the switching pin 24 adjoining the locking head 23.
  • the slot 46 is provided with an extension 50, the diameter of which is adapted to the locking head 23.
  • the end of the slot 46 opens into an opening 51 through which the cross section of the driver is weakened. Due to the size and shape of this opening, it is possible to vary the cross-sectional weakening and thereby influence the spring force against which the slot 46 can be widened in the direction of the arrows 52.
  • the driver 15 when the driver 15 is switched on, that is to say when the switching arm 12 moves, clockwise in FIG. 1, it engages with the locking head 23 of the switching pin 24 of the extinguishing device 17.
  • the location at which the locking head 23 is on the driver 15, arises from the circular arc 40 in FIG. 1. This corresponds approximately to the area in FIG. 3 in which the arrows 52 are entered.
  • the locking head 23 passes through the slot 46 with a resilient widening of the driver, the inwardly sloping flanks 47 leading the locking head to the center of the slot and facilitating the sliding process when passing through.
  • the driver 15 takes over the current supply as soon as the blade contact 14 has been separated from the contact blades 18.
  • the current then flows via the current band 10, the driver 15, the switching pin 24 and through switching pieces located inside the extinguishing device to the connection device 22.
  • the switching arm 12 is pivoted further, the locking head 23 slides along in the slot 45 in the direction of the extension 50 ._Once this is reached, at the latest in the complete switch-off position according to FIG. 1, the locking head passes through the extension 50 through and is returned under the influence of a return spring belonging to the extinguishing device 17 into the starting position shown in FIGS. 1 and 2.
  • the driver 15 is shown in an embodiment made of sheet steel.
  • the same functions i. H. the lateral gripping of a locking head, a suspension for engaging or the clutch and a defined exit point for the uncoupling, can also be achieved by similar bodies that z. B. are bent from spring wire with a flat or round profile.
  • driver 55 shows a driver 55 similar to driver 15 in a view approximately in the direction of arrow 56 in FIG. 3.
  • the funnel-like profile can be seen, which is formed by inclined flanks 57 on both sides of the slot 60.
  • the driver 55 carries two resilient contact elements 61 in a symmetrical arrangement, which rest tightly on the driver and serve to improve contact with the locking head 23 or the subsequent neck 29.
  • the contact elements 61 can be made from spring wire or tape and can be fastened to the driver 55 in any suitable manner. In the example shown, rivets 62 are used for fastening.
  • the contact elements 61 do not have to extend over the entire path to be covered by the locking head 23 in the slot 60. Rather, it is sufficient if the contact elements start below the entry point of the locking head when switching on and end above the extension 63, as shown in FIG. 4.
  • the driver 15 or another driver designed in a corresponding manner allows a fixedly arranged, uniform extinguishing device with a linear structure and accordingly to use linearly movable switching pin.
  • the switching arm 12 of each pole therefore only needs to carry the knife contact piece 14 and the driver 15, which leads to a simple construction. In this way, the advantages of swivel support switches and slide disconnectors are combined.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Mechanisms For Operating Contacts (AREA)
EP82730037A 1981-03-20 1982-03-18 Lasttrennschalter mit einem schwenkbaren Schaltarm und mit einer Löscheinrichtung Withdrawn EP0062603A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3111793 1981-03-20
DE19813111793 DE3111793A1 (de) 1981-03-20 1981-03-20 Lasttrennschalter mit einem schwenkbaren schaltarm und mit einer loescheinrichtung

Publications (1)

Publication Number Publication Date
EP0062603A1 true EP0062603A1 (de) 1982-10-13

Family

ID=6128271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82730037A Withdrawn EP0062603A1 (de) 1981-03-20 1982-03-18 Lasttrennschalter mit einem schwenkbaren Schaltarm und mit einer Löscheinrichtung

Country Status (7)

Country Link
US (1) US4417112A (es)
EP (1) EP0062603A1 (es)
JP (1) JPS57168429A (es)
DE (1) DE3111793A1 (es)
DK (1) DK120082A (es)
ES (1) ES510582A0 (es)
NO (1) NO820875L (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0135789A2 (de) * 1983-08-27 1985-04-03 Licentia Patent-Verwaltungs-GmbH Hochspannungstrennschalter, insbesondere Einsäulen-Trennschalter, zum Schalten kommutierender Ströme

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19837869C1 (de) * 1998-08-20 2000-05-11 Siemens Ag Schaltvorrichtung zum Zu- und Abschalten oder Erden von Streckenabschnitten bei Fahrleitungsanlagen
US6797909B2 (en) * 2003-02-27 2004-09-28 Mcgraw-Edison Company High-voltage loadbreak switch with enhanced arc suppression

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR813697A (fr) * 1935-11-21 1937-06-07 Perfectionnements apportés aux interrupteurs à gaz
US2172225A (en) * 1937-02-20 1939-09-05 Westinghouse Electric & Mfg Co Circuit interrupting device
DE1127989B (de) * 1958-11-11 1962-04-19 Sachsenwerk Licht & Kraft Ag Lasttrennschalter mit schwenkbarem Trennmesser
DE2711342A1 (de) * 1977-03-16 1978-09-21 Sachsenwerk Licht & Kraft Ag Mittelspannungslasttrennschalter
DE3025485A1 (de) * 1980-07-03 1982-01-28 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Elektrischer schalter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL104574B (es) * 1932-03-23
US2658977A (en) * 1948-05-08 1953-11-10 Electrical Eng Equipment Co Electrical load break switch
US2572625A (en) * 1950-03-23 1951-10-23 Tomlinson F Johnson Arc extinguishing attachment for air-break switches
DE946638C (de) * 1951-04-06 1956-08-02 Sachsenwerk Licht & Kraft Ag Schubtrennschalter fuer zusaetzliche Lastabschaltung
US4031346A (en) * 1975-10-20 1977-06-21 Bridges Ronald P Electrical interrupter switch
DE2907574C2 (de) * 1979-02-27 1984-05-17 Concordia Sprecher-Schaltgeräte GmbH, 7024 Filderstadt Löschkammer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR813697A (fr) * 1935-11-21 1937-06-07 Perfectionnements apportés aux interrupteurs à gaz
US2172225A (en) * 1937-02-20 1939-09-05 Westinghouse Electric & Mfg Co Circuit interrupting device
DE1127989B (de) * 1958-11-11 1962-04-19 Sachsenwerk Licht & Kraft Ag Lasttrennschalter mit schwenkbarem Trennmesser
DE2711342A1 (de) * 1977-03-16 1978-09-21 Sachsenwerk Licht & Kraft Ag Mittelspannungslasttrennschalter
DE3025485A1 (de) * 1980-07-03 1982-01-28 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Elektrischer schalter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0135789A2 (de) * 1983-08-27 1985-04-03 Licentia Patent-Verwaltungs-GmbH Hochspannungstrennschalter, insbesondere Einsäulen-Trennschalter, zum Schalten kommutierender Ströme
EP0135789A3 (en) * 1983-08-27 1986-10-29 Licentia Patent-Verwaltungs-Gmbh High-voltage isolating switch, in particular a pantograph isolating switch able to make or break currents

Also Published As

Publication number Publication date
JPS57168429A (en) 1982-10-16
JPH0151010B2 (es) 1989-11-01
NO820875L (no) 1982-09-21
US4417112A (en) 1983-11-22
DK120082A (da) 1982-09-21
ES8303814A1 (es) 1983-02-01
DE3111793A1 (de) 1982-09-30
ES510582A0 (es) 1983-02-01

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19821110

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19840221

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KRYSIAK, JUERGEN

Inventor name: KUEENZLE, PAUL

Inventor name: REUTER, HANS-KARL