EP0286474B1 - Mécanisme de commande d'un interrupteur à trois positions - Google Patents

Mécanisme de commande d'un interrupteur à trois positions Download PDF

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Publication number
EP0286474B1
EP0286474B1 EP88400592A EP88400592A EP0286474B1 EP 0286474 B1 EP0286474 B1 EP 0286474B1 EP 88400592 A EP88400592 A EP 88400592A EP 88400592 A EP88400592 A EP 88400592A EP 0286474 B1 EP0286474 B1 EP 0286474B1
Authority
EP
European Patent Office
Prior art keywords
crank
toggle
operating
switch
spindle
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
EP88400592A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0286474A1 (fr
Inventor
Jacques Vernay
Robert Micoud
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0286474A1 publication Critical patent/EP0286474A1/fr
Application granted granted Critical
Publication of EP0286474B1 publication Critical patent/EP0286474B1/fr
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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3047—Power arrangements internal to the switch for operating the driving mechanism using spring motor adapted for operation of a three-position switch, e.g. on-off-earth

Definitions

  • a known mechanism of the kind mentioned is described in detail in French patent FR-A-2,500,222 of the applicant.
  • a single energy storage spring is sufficient to activate the switch in one of the three positions.
  • the opening and closing control axis coincides with the shaft of the operating cam of the drive lever of the moving element.
  • the knee lever actuation lever is arranged between the shaft of the operating cam, and the control axis of the crank grounding. This results in a lateral overflow of the control lever when it is introduced on one of the two control axes.
  • the release of the maneuvering cam takes place after the neutral point of the toggle joint has been exceeded thanks to the reaction force of a ramp on a cleat of a spring-loaded retaining crank.
  • the ramp and spring retaining crank assembly does not constitute a positive coupling of the cam, since the unlocking occurs when the driving torque of the cam actuated by the toggle outweighs the resistant torque of the retaining crank.
  • the tumbler mechanism with two open and closed positions of the poles of the switch according to document FR-A-2,181,436, comprises a rotary operating shaft, offset from the axis of the crank associated with the toggle joint. An additional transmission is necessary which increases the bulk. The absence of locking of the drive shaft before the neutral switch of the toggle switch can have an influence on the stability of the moving element during the compression phase of the accumulator spring.
  • the object of the invention to improve the size and performance of a control mechanism for a three-position switch, and positive hooking of the operating crank.
  • the erasure of the latching lever advantageously occurs by the mechanical action of a boss located on the first crank of the toggle joint, at a time when the energy accumulated in the actuating spring of the mechanism is maximum.
  • the kinematic chain for returning the opening and closing control movements of the second axis comprises a link articulated to a second transmission crank capable of cooperating with a drive stopper of the first crank of the kneepad.
  • the second crank of the kinematic chain is mounted coaxially on the shaft with the first crank of the toggle.
  • the position of the switch contacts is displayed by means of an indicator fixed directly on the operating shaft.
  • a spring-loaded control mechanism 12 accumulator is housed between a pair of plates 14 supports, and is used to actuate a multipole electric switch incorporated in a switching cell.
  • the switch is electrically connected between a busbar and connection cables (not shown), and can occupy three distinct positions, in particular a first service position F by closing the contacts, a second intermediate position O isolated by opening contacts, and a third cable earth position T.
  • the mechanism 10 is of the single spring tumbler type 12 and with a sudden overrun of neutral position by means of a toggle switch 16 comprising an actuating lever 18 articulated on an axis 20 of a first control crank 22.
  • the axis 20 of the toggle joint 16 cooperates with a cam 24 forming part of a main operating crank 26 fixed on a rotary shaft 28, integral with the movable assembly of the different poles of the switch.
  • the cam 24 has a curvilinear profile centered on the shaft 28 and delimited by two spaced notches 30, 32 constituting stops for the axis 20 in each stable position of the toggle joint 16.
  • the compression spring is threaded on the lever 18, by resting on a fixed shoulder 34 of the latter, and an axis 36 of a crank 38 for earthing control.
  • the earthing operation by the crank 38 is carried out by means of a transmission rod 40, one end of which has an oblong hole 42 in which a first crank pin 44 of the crank 38 is engaged. the earth, and the opposite end of which carries a second crank pin 46 capable of moving in a curvilinear groove 48.
  • the latter is formed in an auxiliary blocking crank 50 ensuring the stopping of the angular travel of the main crank 26 when the switch arrives in the positions O of opening and T of earthing.
  • the earthing crank 38 is integral with a first rotary control axis 52 which can be rotated between the open positions O and earthing T.
  • the angular travel of the crank 38 is limited by two stop blocks 54, 56.
  • the auxiliary locking crank 50 cooperates with a stop 60 and is mounted on an axis 58 extending parallel to the operating shaft 28.
  • the opening and closing operation of the switch is effected by means of a control lever (not shown) introduced on a second control axis 62 offset from the pole control shaft 28 .
  • the control movement is returned by means of a kinematic chain 64 comprising a link 66 articulated by its opposite ends, respectively to a third control crank 68 wedged on the rotary axis 62, and to a second crank 70 of transmission mounted in free rotation on the shaft 28.
  • the crank 22 of the toggle joint 16 is mounted loosely on the shaft 28, and includes a driving cleat 72 capable of cooperating with the crank 70 of transmission when the switch is closed and opened.
  • a hooking lever 78 is pivotally mounted on an axis 80 between a locked position and an unlocked position, and comprises a retaining stud 82 intended to snap into the locked position on a step 84, 86 of the main crank 26 of maneuver.
  • a torsion spring 88 is inserted on the axis 80 and biases the latching lever 78 towards the locked position (fig. 1 and 2).
  • the presence of the lever 78 ensures in the locked position a positive attachment of the main crank 26 before the neutral switch of the toggle switch 16 intervening during the opening and closing strokes.
  • the release of the crank 26 by unlocking of the lever 78 takes place automatically in the vicinity of the crossing of the neutral point thanks to the action of a boss 90 (FIG. 4) belonging to the crank 22 of the toggle joint 16.
  • An indicator (not shown) is fixed directly to the operating shaft 28, so as to display the actual position of the switch contacts.
  • the main operating crank 26 is in stable abutment against a stop 92, and is locked in this position by the hooking lever 78, the stud 82 of which blocks the step 84 by preventing the main crank 26 from rotating in the trigonometric direction. .
  • the pivot pin 20 of the toggle joint 16 is positioned in the notch 32 of the cam 24, and the earthing crank 38 is held against the lower stop cleat 54 by the action of the spring 12.
  • the switch is opened by engaging a control lever on the axis 62, followed by a rotation of the crank 68 in the counterclockwise direction indicated by the arrow O (fig. 5).
  • the kinematic chain 64 moves the transmission crank 70 in a trigonometric direction, which in the same direction drives the cleat 72 of the crank 22 of the toggle joint 16.
  • the pivot axis 20 of the toggle joint 16 goes up along the cam 24 , while the main crank 26 remains blocked in the position of FIG. 1 by the locking action of the latching lever 78.
  • cranks 38 and 50 and the link rod 40 remain stationary during the opening and closing movements of the mechanism 10.
  • the offset of the control axis 62 relative to the shaft 28 for maneuvering the moving element avoids any lateral overflow of the control lever.
  • the closing and opening of the switch by unlocking the latching lever 78 of the mechanism 10 to be tumbled occurs at precise times when the energy stored in the accumulator spring 12 is maximum.
  • the cables are earthed from the open position O (fig. 2 and 6) by actuating the pin 52 of operating the crank 38 clockwise, indicated by the arrow FT in fig. 6.
  • This operation is analogous to that described in the mechanism of the aforementioned French patent No. 2,500,222.
  • the lever 78 remains inactive during this operating phase, and authorizes the tilting of the main crank 26 towards the position T (fig. 3 and 7).

Landscapes

  • Mechanisms For Operating Contacts (AREA)
  • Harvester Elements (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP88400592A 1987-03-27 1988-03-11 Mécanisme de commande d'un interrupteur à trois positions Expired - Lifetime EP0286474B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8704658A FR2613123B1 (fr) 1987-03-27 1987-03-27 Mecanisme de commande d'un interrupteur a trois positions
FR8704658 1987-03-27

Publications (2)

Publication Number Publication Date
EP0286474A1 EP0286474A1 (fr) 1988-10-12
EP0286474B1 true EP0286474B1 (fr) 1993-06-23

Family

ID=9349722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400592A Expired - Lifetime EP0286474B1 (fr) 1987-03-27 1988-03-11 Mécanisme de commande d'un interrupteur à trois positions

Country Status (11)

Country Link
US (1) US4916268A (enrdf_load_stackoverflow)
EP (1) EP0286474B1 (enrdf_load_stackoverflow)
BR (1) BR8801385A (enrdf_load_stackoverflow)
CA (1) CA1303656C (enrdf_load_stackoverflow)
DE (1) DE3881938T2 (enrdf_load_stackoverflow)
ES (1) ES2042781T3 (enrdf_load_stackoverflow)
FR (1) FR2613123B1 (enrdf_load_stackoverflow)
IN (1) IN170816B (enrdf_load_stackoverflow)
PT (1) PT87032B (enrdf_load_stackoverflow)
TR (1) TR23159A (enrdf_load_stackoverflow)
YU (1) YU47465B (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2651603B1 (fr) * 1989-09-07 1991-11-08 Merlin Gerin Mecanisme de commande d'un interrupteur multipolaire a haute tension.
FR2660109B1 (fr) * 1990-03-23 1992-06-05 Merlin Gerin Mecanisme de commande d'un interrupteur a trois positions.
DE4034084A1 (de) * 1990-10-26 1992-04-30 Felten & Guilleaume Energie Sprungantrieb fuer mittelspannungsschaltanlagen
US5276288A (en) * 1991-08-26 1994-01-04 Boltswitch, Inc. Shunt trip switch operator
US5138296A (en) * 1991-12-12 1992-08-11 Allen-Bradley Company, Inc. Electric switch
ES2090439T3 (es) * 1992-09-10 1996-10-16 Gec Alsthom T & D Ag Accionamiento de salto para interruptores electricos.
FR2696866B1 (fr) * 1992-10-13 1994-12-02 Merlin Gerin Mécanisme d'actionnement d'un interrupteur à trois positions.
DE19904931C2 (de) * 1999-02-06 2001-11-29 Felten & Guilleaume Ag Schaltantrieb für einen Leistungstrennschalter
US6940032B2 (en) 2004-01-12 2005-09-06 General Electric Company Method and apparatus for achieving three positions
US7368677B2 (en) * 2005-12-14 2008-05-06 Eaton Corporation Reverse bias hatchet reset spring
US8058580B2 (en) * 2009-09-16 2011-11-15 Eaton Corporation Electrical switching apparatus and linking assembly therefor
EP3901977B1 (en) * 2020-04-22 2024-07-10 ABB Schweiz AG Operating mechanism for controlling an earthing switch of a medium voltage switchgear

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2181436B3 (enrdf_load_stackoverflow) * 1972-04-24 1975-06-20 Alsthom Cgee
FR2500222A1 (fr) * 1981-02-13 1982-08-20 Merlin Gerin Mecanisme de manoeuvre pour appareillage de commutation electrique a trois positions distinctes
US4616118A (en) * 1984-06-19 1986-10-07 General Signal Corporation Cock and trip switch actuating mechanism

Also Published As

Publication number Publication date
YU59488A (en) 1990-12-31
FR2613123A1 (fr) 1988-09-30
TR23159A (tr) 1989-05-03
EP0286474A1 (fr) 1988-10-12
PT87032B (pt) 1995-03-31
DE3881938D1 (de) 1993-07-29
DE3881938T2 (de) 1994-01-13
US4916268A (en) 1990-04-10
ES2042781T3 (es) 1993-12-16
PT87032A (pt) 1989-03-30
IN170816B (enrdf_load_stackoverflow) 1992-05-23
FR2613123B1 (fr) 1989-06-09
BR8801385A (pt) 1988-11-01
CA1303656C (en) 1992-06-16
YU47465B (sh) 1995-10-03

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