EP0295158B1 - Mecanisme de commande d'un disjoncteur électrique miniature - Google Patents

Mecanisme de commande d'un disjoncteur électrique miniature Download PDF

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Publication number
EP0295158B1
EP0295158B1 EP88401151A EP88401151A EP0295158B1 EP 0295158 B1 EP0295158 B1 EP 0295158B1 EP 88401151 A EP88401151 A EP 88401151A EP 88401151 A EP88401151 A EP 88401151A EP 0295158 B1 EP0295158 B1 EP 0295158B1
Authority
EP
European Patent Office
Prior art keywords
lever
plate
latch
trip lever
rod
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
EP88401151A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0295158A1 (fr
Inventor
William Bartolo
Michel Lazareth
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9351866&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0295158(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0295158A1 publication Critical patent/EP0295158A1/fr
Application granted granted Critical
Publication of EP0295158B1 publication Critical patent/EP0295158B1/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
    • 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
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
    • 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
    • H01H71/04—Means for indicating condition of the switching device

Definitions

  • Such a device is known from document EP-A-224,396, in which the breakable mechanical connection consists of a notch in the plate intended to cooperate directly with the cylindrical end of the link in the armed position of the mechanism.
  • Such a mechanism is perfectly suitable for circuit breakers of low ratings, but for larger ratings, the tripping force required to break the mechanical connection would be too great, and would lead to oversize the trip device, which is impossible because of the reduced overall dimensions of the housing.
  • the object of the invention is to simplify the production of a miniature circuit breaker mechanism having a reduced tripping force and a good contact pressure.
  • the mechanism according to the invention is characterized in that the breakable mechanical connection is formed by a notch retaining the trigger lever cooperating with a latching hook pivotally mounted on an axis of the plate, and that the transmission link is coupled to the hook at an intermediate point of articulation situated between the axis of the plate and the spout of said hook.
  • the intermediate point of articulation moves when triggering in a light of the plate, said blind or open light advantageously being shaped in a circular sector centered on the axis of the hooking hook.
  • the mechanical hook connection constitutes a multiplier stage in the kinematic chain for triggering the mechanism, allowing a reduction in the tripping force coming from the magnetothermal trigger.
  • the bimetallic strip is connected to the trigger lever by a rotary drawer with unidirectional transmission arranged to constitute a rigid kinematic connection without friction with the trigger lever when the bimetallic strip drives the drawer in the event of thermal triggering, said link is automatically interrupted when the plate is moved to the open position of the contacts, or when the striker acts on the trigger lever in the event of a magnetic trigger.
  • the hook for hooking the mechanism cooperates after triggering with a hard snap point formed in the trigger lever so as to lock the hook in a fault signaling position.
  • the mechanism 10 for controlling a miniature electric circuit breaker with molded insulating housing 12 is of the type described in European patent application EP-A-224,396 of the applicant.
  • the mechanism 10 actuates a movable contact arm 14 whose free end carries a contact piece 16 cooperating with a fixed contact 18.
  • An opening 20 is formed in the front face 22 of the housing 12 for the passage of a lever 24 mounted with pivoting limit on an axis 26 between a closed position ( Figure 1) in which the contacts 16,18 are closed, and an open position ( Figure 2) corresponding to the separation of the contacts 16,18.
  • the handle 24 is equipped with an internal base coupled to a transmission link 28 to constitute a toggle device 30 whose articulation 32 is eccentric relative to the fixed axis 26 of the handle 24.
  • the lever 24 is urged in a counterclockwise direction towards the open position by a return spring (not shown).
  • the fixed contact 18 is secured to the casing of the electromagnetic trip device of which only the striker 34 is shown in the figures.
  • the contact arm 14 is fixed to a support lever 36 of insulating material, articulated on a pivot 38 of a rotary plate 40.
  • a contact pressure spring (not shown), inserted on the pivot 38, allows relative pivoting movement of small amplitude between the plate 40 and the support lever 36.
  • a trigger lever 42 controlled by the striker 34 of the electromagnetic trigger, and the bimetallic strip 44 of the thermal trigger, is pivotally mounted on an axis 46 carried by the plate 40 with a predetermined offset relative to the pivot 38.
  • a breakable mechanical connection 48 is provided between the transmission link 28 and the plate 40 for driving the arm of contact 14.
  • the link 48 authorizes manual control of the mechanism 10 by the lever 24.
  • the movement of the trigger lever 42 to the triggered position under the action of the trigger causes the mechanical link 48 to break momentarily, causing the automatic triggering of the mechanism 10, independently of the lever 24.
  • the trigger lever 42 is associated with a return spring (not shown) intended to ensure the automatic re-establishment of the mechanical connection 48 when the lever 24 is actuated towards the position opening, following a trip of mechanism 10 on fault.
  • the breakable mechanical link 48 comprises a hook 50 for hooking pivotally mounted on an axis 52 of the plate 40. Opposite the axis 52, the beak of the hook 50 cooperates in the locked position of the link 48 with a retaining notch 54 located on the upper arm of the trigger lever 42.
  • the transmission link 28 is coupled to the hook 50 at a point 56 of articulation capable of moving when tripping in a light 58 of the plate 40.
  • the light 58 is blind or open, and is shaped in a circular sector centered on the axis 52.
  • the intermediate point of articulation 56 is located between the axis 52 and the spout of the hook 50 for attachment.
  • the link 48 constitutes a step-down stage in the kinematic chain of the mechanism 10, allowing a reduction in the tripping force coming from the magnetothermal trigger.
  • the bimetallic strip 44 of the thermal trip device cooperates with the trip lever 42 by means of a rotary slide 60 with unidirectional transmission (see FIGS. 1 and 2).
  • the drawer 60 is formed by a bent lever having a freely coupled end or lower arm of the trigger lever 42 at a point of articulation 62.
  • the curved intermediate part of the transmission lever bears on a boss 64 of the trigger lever 42 so as to cause the latter to the triggered position during the deflection towards the right of bimetallic strip 44 in the event of an overload current flowing in the pole.
  • the drawer 60 constitutes a rigid kinematic connection between the bimetallic strip 44 and the tripping lever 42.
  • the absence of parasitic friction between the drawer 60 and the tripping lever 42 allows a significant reduction in the effort of the trigger transmitted by the bimetallic strip 44.
  • the articulation point 62 is disposed between the boss 64 and the pivot axis 46 of the trigger lever 42.
  • the end 66 of the drawer 60 opposite the articulation point 62 is capable of abutting against a protuberance of the housing 12, with rupture of the kinematic connection with the trigger lever 42.
  • the plate 40 can pivot around the pivot 38 in the counterclockwise direction, and the intermediate zone of the drawer 60 is spaced from the boss 64 (FIG. 2). Note that if the connection remained rigid between the drawer 60 and the trigger lever 42, the complete opening of the mechanism 10 would be made impossible.
  • the articulation point 62 of the drawer 60 could of course be merged with the pivot axis 46 of the trigger lever 42.
  • the striker 34 of the electromagnetic trip device acts on the lower arm of the trip lever 42 to ensure the unlocking of the hook 50 for hooking by escaping the retaining notch 54.
  • the trigger lever 42 is thus moved to the triggered position in the counterclockwise direction, without any braking reaction of the thermal trigger drawer 60 which remains inactive thanks to the presence of the flexible connection with the bimetallic strip 44.
  • FIG. 3 shows the mechanism 10 after tripping on a fault, the handle 24 being held manually in the right position, against the return force of its spring.
  • This position of the lever 24 corresponds to the closed position of FIG. 4, but the link 28 does not allow the reestablishment of the mechanical connection 48 of the hook 50 with the notch 54 of the trigger lever 42, and the mechanism 10 remains triggered .
  • the mechanical link 48 is re-established automatically as soon as the manual locking action of the lever 24 is released.
  • the lever 24 tilting can occupy a stable intermediate position (case of Figure 4) after tripping on thermal or magnetic fault.
  • the trigger lever 42 includes a hard snap point 102 capable of blocking the hook 50 after triggering and breaking of the mechanical link 48.
  • a colored marker 104 intended to signal the triggered position of the hook 50 through a signaling light 106 formed in the front face 22 of the housing 12.
  • the blocking of the hook 50 by the snap point 102 makes it possible to permanently signal the fault, firstly by the light 106 and d 'other hand by the lever 24 which occupies the intermediate stable position.
  • the fault indicator function is thus integrated into the circuit breaker.
  • the non-automatic rearming of the mechanism 100 is carried out by manual movement of the lever 24 in a counterclockwise direction from the intermediate position to the open position (see arrow R), causing the restoration of the mechanical connection 48 between the lever 24 and the plate 40, and the return of the mechanism 100 to the open device state of FIG. 2.
  • the fault signal disappears, and the device is ready to be closed by pivoting the lever 24 towards the closed position (figure 1).

Landscapes

  • Breakers (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Trip Switchboards (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
EP88401151A 1987-06-09 1988-05-11 Mecanisme de commande d'un disjoncteur électrique miniature Expired - Lifetime EP0295158B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8708037A FR2616583B1 (fr) 1987-06-09 1987-06-09 Mecanisme de commande d'un disjoncteur electrique miniature
FR8708037 1987-06-09

Publications (2)

Publication Number Publication Date
EP0295158A1 EP0295158A1 (fr) 1988-12-14
EP0295158B1 true EP0295158B1 (fr) 1992-07-22

Family

ID=9351866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88401151A Expired - Lifetime EP0295158B1 (fr) 1987-06-09 1988-05-11 Mecanisme de commande d'un disjoncteur électrique miniature

Country Status (15)

Country Link
US (1) US4916420A (es)
EP (1) EP0295158B1 (es)
JP (1) JP2735565B2 (es)
CN (1) CN1018684B (es)
AU (1) AU607227B2 (es)
CA (1) CA1327625C (es)
DE (1) DE3872955T2 (es)
ES (1) ES2034301T3 (es)
FR (1) FR2616583B1 (es)
HK (1) HK41895A (es)
IN (1) IN171389B (es)
PT (1) PT87685B (es)
TN (1) TNSN88051A1 (es)
YU (1) YU47468B (es)
ZA (1) ZA883640B (es)

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US6087913A (en) 1998-11-20 2000-07-11 General Electric Company Circuit breaker mechanism for a rotary contact system
US6114641A (en) 1998-05-29 2000-09-05 General Electric Company Rotary contact assembly for high ampere-rated circuit breakers
US6166344A (en) 1999-03-23 2000-12-26 General Electric Company Circuit breaker handle block
US6172584B1 (en) 1999-12-20 2001-01-09 General Electric Company Circuit breaker accessory reset system
US6175288B1 (en) 1999-08-27 2001-01-16 General Electric Company Supplemental trip unit for rotary circuit interrupters
US6184761B1 (en) 1999-12-20 2001-02-06 General Electric Company Circuit breaker rotary contact arrangement
US6188036B1 (en) 1999-08-03 2001-02-13 General Electric Company Bottom vented circuit breaker capable of top down assembly onto equipment
US6204743B1 (en) 2000-02-29 2001-03-20 General Electric Company Dual connector strap for a rotary contact circuit breaker
US6211757B1 (en) 2000-03-06 2001-04-03 General Electric Company Fast acting high force trip actuator
US6211758B1 (en) 2000-01-11 2001-04-03 General Electric Company Circuit breaker accessory gap control mechanism
US6215379B1 (en) 1999-12-23 2001-04-10 General Electric Company Shunt for indirectly heated bimetallic strip
US6218919B1 (en) 2000-03-15 2001-04-17 General Electric Company Circuit breaker latch mechanism with decreased trip time
US6218917B1 (en) 1999-07-02 2001-04-17 General Electric Company Method and arrangement for calibration of circuit breaker thermal trip unit
US6225881B1 (en) 1998-04-29 2001-05-01 General Electric Company Thermal magnetic circuit breaker
US6229413B1 (en) 1999-10-19 2001-05-08 General Electric Company Support of stationary conductors for a circuit breaker
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US6268991B1 (en) 1999-06-25 2001-07-31 General Electric Company Method and arrangement for customizing electronic circuit interrupters
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CN101923992B (zh) * 2010-08-20 2012-12-12 上海电科电器科技有限公司 一种控制与保护开关电器操作机构
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CN103021746B (zh) * 2012-11-30 2014-11-05 浙江中凯科技股份有限公司 控制与保护开关电器的操作机构
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CN104319130B (zh) * 2014-09-18 2016-11-30 平高集团有限公司 操动机构及其闭锁装置
FR3036000B1 (fr) * 2015-05-07 2017-04-21 Schneider Electric Ind Sas Dispositif de commande d'un appareil de protection electrique et appareil de protection electrique le comportant
CN108807099B (zh) * 2017-05-04 2024-03-15 周思雨 一种微型断路器及其手动分闸突跳组件及方法
CN109727826A (zh) 2018-12-28 2019-05-07 浙江正泰电器股份有限公司 小型断路器
CN109585233B (zh) * 2018-12-28 2024-05-14 浙江正泰电器股份有限公司 小型断路器
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FR2589627B1 (fr) * 1985-10-31 1988-08-26 Merlin Gerin Mecanisme de commande pour disjoncteur electrique a basse tension

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Also Published As

Publication number Publication date
IN171389B (es) 1992-09-26
CN88103427A (zh) 1988-12-28
US4916420A (en) 1990-04-10
ES2034301T3 (es) 1993-04-01
PT87685B (pt) 1993-09-30
TNSN88051A1 (fr) 1990-07-10
DE3872955T2 (de) 1993-03-11
ZA883640B (en) 1988-11-29
CN1018684B (zh) 1992-10-14
YU47468B (sh) 1995-10-03
FR2616583B1 (fr) 1995-01-06
PT87685A (pt) 1989-05-31
AU607227B2 (en) 1991-02-28
EP0295158A1 (fr) 1988-12-14
FR2616583A1 (fr) 1988-12-16
YU109388A (en) 1991-02-28
HK41895A (en) 1995-03-31
JP2735565B2 (ja) 1998-04-02
AU1751388A (en) 1988-12-15
DE3872955D1 (de) 1992-08-27
CA1327625C (en) 1994-03-08
JPS63313445A (ja) 1988-12-21

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