EP0330421A2 - Mécanisme interrupteur - Google Patents

Mécanisme interrupteur Download PDF

Info

Publication number
EP0330421A2
EP0330421A2 EP89301660A EP89301660A EP0330421A2 EP 0330421 A2 EP0330421 A2 EP 0330421A2 EP 89301660 A EP89301660 A EP 89301660A EP 89301660 A EP89301660 A EP 89301660A EP 0330421 A2 EP0330421 A2 EP 0330421A2
Authority
EP
European Patent Office
Prior art keywords
rocker
lever carrier
carrier
push button
contact
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Withdrawn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
EP89301660A
Other languages
German (de)
English (en)
Other versions
EP0330421A3 (fr
Inventor
Kenneth Jeffrey Bailey
Barry Boothman
Stephen Mark Trafford
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.)
Delta Accessories & Domestic Switchgear Ltd
Original Assignee
Delta Accessories & Domestic Switchgear Ltd
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 Delta Accessories & Domestic Switchgear Ltd filed Critical Delta Accessories & Domestic Switchgear Ltd
Publication of EP0330421A2 publication Critical patent/EP0330421A2/fr
Publication of EP0330421A3 publication Critical patent/EP0330421A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/62—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement

Definitions

  • This invention relates to switch mechanisms and particularly, but not exclusively to a so called trip-free switch mechanism, i.e. a switch mechanism which cannot be reclosed while a fault exists.
  • a switch mechanism in which a contact carrier is moved between an inoperative and an operative position by an actuator, and the actuator then completes a circuit to the contact.
  • This construction is both complex and cumbersome and requires the bonding of electrical connections to two moving contacts. This presents difficulties and increases the costs of the trip-free mechanism.
  • the present invention seeks to provide a switch mechanism of simplified construction.
  • an electrical switch mechanism comprising a lever carrier movable between an inoperative position and an operative position where a contact on the lever carrier can come into contact with a fixed contact, and an actuator for acting on the lever carrier, characterised in that when actuated the actuator moves the carrier to an intermediate position, but the carrier is not moved into the operative position where the moving contact engages with the fixed contact until the actuator has been released.
  • an electrical switch mechanism comprising: a fixed contact; a movable contact on a lever carrier, movable between an inoperative position and an operative position where the contacts engage, through an intermediate position; a pivotable rocker carrying first bias means for urging the lever carrier, the rocker being pivotable from a first rest position where the first bias means can urge the lever carrier into the inoperative position and a second position where the bias means can urge the lever carrier into the intermediate position; an actuator comprising a push button which, when actuated, pivots the rocker between the first position and the second position, and a latch which retains the rocker in the second position upon release of the push button, the arrangement being such that when the push button is subsequently released, the first bias means urges the lever carrier into the operative position.
  • the switch mechanism generally comprises a fixed contact 1, a moving contact 2 at one end of a carrier in the form of a lever 3 mounted on a pivotal contact 4, a pivotally mounted rocker 5 biased in an anti-clockwise direction by a spring 6 and having a slidable plunger 7 biased by a spring 8 into engagement with the carrier lever 3, an actuator in the form of a pivotally mounted push-button 9 biased in an anti-clockwise direction by a spring 10, a plunger 13 resting on the lever 3, and a solenoid operated latch 14.
  • the fixed contact 1 and the pivotally mounted carrier lever 3 are disposed so that the moving contact 2 can engage with the fixed contact 1 when the carrier lever pivots about the pivot contact 4, through which pivot contact electrical connection is made to the moving contact.
  • the fixed contact 1 and an electrical connection to the pivot contact 4 can be connected to an electrical circuit as required.
  • the pivotally mounted carrier lever 3 is generally elongate, having at one end the moving contact 2 and in a central portion a recess 3a.
  • the plunger 13 rests on the opposite end of the lever carrier 3 to the moving contact 2.
  • the rocker 5 is pivoted at P and an arm 17 of the rocker is engaged by the spring 6 to bias the rocker 5 in an anti-clockwise direction, while an opposite arm 18 of the rocker 5 has a free end 19 which can engage with the solenoid latch 14, as will be described hereinafter.
  • the rocker carries a slidable plunger 7 which is biased by a spring 8.
  • the spring 8 acts in a line passing through the pivot point P and so does not act to pivot the rocker 5.
  • the spring 8 biases the rocker plunger 7 into engagement with the lever carrier 3 in the central recess 3a of the lever carrier 3. As will become apparent, the range of movement of the rocker plunger 7 along the lever carrier 3 is limited by the recess 3a.
  • the push button 9 is pivoted at Q and biased in an anti-clockwise direction by a spring 10.
  • the push button 9 has two depending finger portions 11, 12.
  • the first finger portion 11, the more distant of the two from the pivot point Q on the push button 9, and the layer of the two fingers is positioned to engage with the arm of the rocker 5 which is biased by the spring 6.
  • the push button 9 is disposed so that in operation, as will be described hereinafter, the inner shorter finger 12 can engage with the plunger 13.
  • the solenoid operated latch 14 has a nose 15 with a recess 15a for receiving the free end of the arm of the rocker 5.
  • the latch nose 15 is biased by a spring 16 towards the free end 19 of the arm 18 of the rocker 5.
  • the solenoid operated latch 14 is arranged when operated to retract the latch nose 15. To operate of the solenoid latch 14, it is of course necessary for the solenoid to be connected to a fault detecting circuit. This is well known in the art and will not be described further.
  • the rocker plunger 7 will be, as shown in Figure 1, at the right hand most end of the recess 3a in the lever carrier 3, biasing the lever carrier in a clockwise direction, thereby keeping the moving contact 2 spaced apart from the fixed contact 1.
  • the plunger 13 will rest freely on the opposite end of the lever carrier 3 to the moving contact 2. This is the normal off condition on the switching mechanism.
  • the push button 9 will pivot about the point Q against the force of the spring 10 and also of the spring 6 so that the rocker 5 will be pivoted in a clockwise direction about the point P.
  • the rocker 5 is pivoted clockwise two significant events occur first the free end 19 of the rocker arm 18 move towards and eventually engages in the recess 15a of the latch nose 15 of the solenoid 14, thereby becoming latched therein, and second the plunger 7 is moved along the recess 3a of the lever carrier 3 past the pivot point 4, compressing the spring 8 as it does so.
  • the switch mechanism is maintained in the "ON" position shown in Figure 3 by the retention of the free end 19 of the rocker arm 18 by the solenoid latch nose 15.
  • the solenoid 14 is activated to retract the solenoid latch nose 15 to release the free end 19 of the rocker arm 5. If this occurs, the spring 6 will urge the rocker 5 anti-clockwise about the pivot point P moving the rocker plunger 7 along the recess 3a in the lever carrier 3 until it passes the pivot contact point 4 and then the force of the spring 8 will urge the plunger 7 to bias the lever carrier 3 in a clockwise direction moving the moving contact 2 away from the fixed contact 1.

Landscapes

  • Push-Button Switches (AREA)
  • Switches With Compound Operations (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP19890301660 1988-02-22 1989-02-21 Mécanisme interrupteur Withdrawn EP0330421A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8804074 1988-02-22
GB888804074A GB8804074D0 (en) 1988-02-22 1988-02-22 Switch mechanism

Publications (2)

Publication Number Publication Date
EP0330421A2 true EP0330421A2 (fr) 1989-08-30
EP0330421A3 EP0330421A3 (fr) 1991-01-09

Family

ID=10632130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890301660 Withdrawn EP0330421A3 (fr) 1988-02-22 1989-02-21 Mécanisme interrupteur

Country Status (2)

Country Link
EP (1) EP0330421A3 (fr)
GB (1) GB8804074D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3690918A1 (fr) * 2019-02-01 2020-08-05 Rockwell Automation Switzerland GmbH Procédé et dispositif inhibitant la fermeture manuelle des contacts d'un disjoncteur de protection

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1139173A (fr) * 1955-12-30 1957-06-26 Gardy Particip App Perfectionnements apportés aux disjoncteurs
GB2086136A (en) * 1980-08-12 1982-05-06 B & R Relays Ltd Improvements in and relating to earth leakage circuit breakers
EP0133809A2 (fr) * 1983-08-12 1985-03-06 DELTA ACCESSORIES & DOMESTIC SWITCHGEAR LIMITED Mécanisme d'un interrupteur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1139173A (fr) * 1955-12-30 1957-06-26 Gardy Particip App Perfectionnements apportés aux disjoncteurs
GB2086136A (en) * 1980-08-12 1982-05-06 B & R Relays Ltd Improvements in and relating to earth leakage circuit breakers
EP0133809A2 (fr) * 1983-08-12 1985-03-06 DELTA ACCESSORIES & DOMESTIC SWITCHGEAR LIMITED Mécanisme d'un interrupteur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3690918A1 (fr) * 2019-02-01 2020-08-05 Rockwell Automation Switzerland GmbH Procédé et dispositif inhibitant la fermeture manuelle des contacts d'un disjoncteur de protection

Also Published As

Publication number Publication date
EP0330421A3 (fr) 1991-01-09
GB8804074D0 (en) 1988-03-23

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