EP2816577A1 - Dispositif de fermeture de contact pour commutateur - Google Patents

Dispositif de fermeture de contact pour commutateur Download PDF

Info

Publication number
EP2816577A1
EP2816577A1 EP20140002118 EP14002118A EP2816577A1 EP 2816577 A1 EP2816577 A1 EP 2816577A1 EP 20140002118 EP20140002118 EP 20140002118 EP 14002118 A EP14002118 A EP 14002118A EP 2816577 A1 EP2816577 A1 EP 2816577A1
Authority
EP
European Patent Office
Prior art keywords
contact
lever
trip
movable
spring
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.)
Granted
Application number
EP20140002118
Other languages
German (de)
English (en)
Other versions
EP2816577B1 (fr
Inventor
Domenico Bosatelli
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.)
Gewiss SpA
Original Assignee
Gewiss SpA
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 Gewiss SpA filed Critical Gewiss SpA
Publication of EP2816577A1 publication Critical patent/EP2816577A1/fr
Application granted granted Critical
Publication of EP2816577B1 publication Critical patent/EP2816577B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/12Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/046Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using snap closing mechanisms
    • H01H2300/048Snap closing by latched movable contact, wherein the movable contact is held in a minimal distance from the fixed contact during first phase of closing sequence in which a closing spring is charged

Definitions

  • the present invention relates to a contact closing device for a switch.
  • Electrical switches are known which use mechanisms that allow to open and close a plurality of movable contacts in parallel and synchronously by operating an external handle that can be accessed by the user and by the automatic intervention of the protection devices provided in the switch.
  • Some switches are provided with devices that allow to render the contact closure speed independent of the speed of operation of the handle.
  • the contacts close instantaneously, to prevent dangerous effects such as the onset of an electric arc between the approaching contacts.
  • FR-2717617 and EP2061060 disclose electrical switches provided with systems that ensure a rapid contact closure.
  • FR2686453 discloses a differential switch having a rapid-disengaging mechanism in a box, between an operating handle and a contact support.
  • Another fundamental problem is to improve the performance of switches while maintaining small dimensions and in any case within standards.
  • the aim of the present invention is to provide a device for closing the contacts of a switch that ensures a rapid closure that is independent of the operating speed of the operating handle, with a structure that is simple and that can be produced economically.
  • an object of the invention is to provide a contact closure device that can be used in safety switches such as residual current circuit breakers and magneto-thermal circuit breakers.
  • Another object of the present invention is to provide a device which, by virtue of its particular constructive characteristics, is capable of giving the greatest assurances of reliability and safety in use.
  • a contact closing device for a switch comprising at least one movable contact and at least one fixed contact, said movable contact being operated by means of a mechanism actuated by an operating handle; a contact holder lever supporting one or more movable contacts; said contact holder lever having a rotational motion between an open contact position and a closed contact position; each of said movable contacts having an oscillating motion within a respective seat formed in said contact holder lever; a tripping lever associated with said contact holder lever and adapted to actuate the oscillating motion of each movable contact; said closing device being characterized in that each movable contact is fitted in said respective seat together with a respective spring and a respective trip blade; each trip blade being engaged by said trip lever during a portion of said rotational motion of said trip lever from said open contact position to said closed contact position; during said portion of rotational motion said trip blade blocking at least partially the movement of said movable contact and said spring undergoing a compression
  • the contact closing device is described here within a residual current circuit breaker, generally designated by the reference numeral 100, which includes a residual current circuit 101, constituted by a relay and a differential transformer.
  • the residual current circuit 101 is adapted to actuate the movement of at least one movable contact 3 with respect to a fixed contact 103, by virtue of a free tripping mechanism 104, in order to close or open the circuit between two input and output terminals 105.
  • the breaker 100 has an actuation handle 106 for the manual actuation of the mechanism 104.
  • the mechanism 104 includes the closing device 1, which has at least one contact holder lever 2.
  • a movable contact 3 is fitted in the holder lever 2 and a contact pad 102 is fixed on the movable contact 3.
  • the movable contact 3 is constituted by a contact holder arm 31 that blends into a supporting arm 32 by means of a curved portion 33.
  • the supporting arm 32 is provided with a slot 34 and a tab 35.
  • the movable contact 3 can oscillate within a respective seat 21 formed in the lever 2, in contrast with a spring 5, which is interposed between the contact holder arm 31 and a spring support 6, which is fitted within the seat 21 of the lever 2.
  • the spring support 6 has a protrusion 61 which engages an end of the spring 5.
  • the spring support 6 also has a recess 62 provided with an internal tooth 63 which engages the slot 34 of the movable contact 3.
  • a notch 64 provided at the recess 62, engages the tab 35 of the movable contact 3.
  • a trip blade 7 is mounted inside the seat 21 of the lever 2 and is provided with an end 71 that is adapted to be engaged by a trip lever 8 fitted on the lever 2.
  • the trip lever 8 is provided with a protrusion 81 for each trip blade 7.
  • the trip lever 8 also has a trip tab 82 that is moved by a cam 9 that is fitted on the rotation axis of the contact holder lever 2.
  • the contact holder lever 2 may include one or more movable contacts, for example two, as in the illustrated example, or four or more.
  • the trip lever 8 is a single lever and allows to temporarily lock the moving contacts and to release them at a given instant.
  • Each movable contact is provided with a trip blade 7, which engages the trip lever 8, during the closure maneuver, blocking the movement of the respective movable contact 3 in the direction of the fixed contact 103 but releasing the movable contact 3 at a given instant.
  • each trip blade 7 is engaged in the respective protrusion 81 of the trip lever 8.
  • the spring Upon tripping, i.e., when the trip blade 7 disengages from the trip lever 8, the spring is extended and generates an instantaneous motion of the movable contact 3 toward the fixed contact 103, closing the electric circuit between the terminals on the power supply side and those on the load side.
  • Figures 1-3 illustrate the sequence of the movements of the device in passing from the open contact position to the closed contact position due to the maneuver induced by the operating handle 106.
  • the invention achieves the intended aim and objects, providing a device for closing the contacts of a switch that ensures a contact closure that is independent of the operating speed of the handle of the switch.
  • the device according to the present invention is structurally simple and can be produced easily and economically, at the same time ensuring high reliability and durability.

Landscapes

  • Breakers (AREA)
  • Push-Button Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Tumbler Switches (AREA)
EP14002118.9A 2013-06-21 2014-06-19 Dispositif de fermeture de contact pour commutateur Active EP2816577B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001034A ITMI20131034A1 (it) 2013-06-21 2013-06-21 Dispositivo di chiusura dei contatti di un interruttore

Publications (2)

Publication Number Publication Date
EP2816577A1 true EP2816577A1 (fr) 2014-12-24
EP2816577B1 EP2816577B1 (fr) 2016-03-30

Family

ID=48877389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14002118.9A Active EP2816577B1 (fr) 2013-06-21 2014-06-19 Dispositif de fermeture de contact pour commutateur

Country Status (4)

Country Link
EP (1) EP2816577B1 (fr)
CN (1) CN104241052B (fr)
ES (1) ES2569948T3 (fr)
IT (1) ITMI20131034A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104599913B (zh) * 2015-01-21 2016-08-24 温州高能电气有限公司 一种漏电断路器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022000272A1 (fr) * 2020-06-30 2022-01-06 浙江沃斯托电气有限公司 Disjoncteur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686453A1 (fr) 1992-01-17 1993-07-23 Legrand Sa Interrupteur differentiel.
FR2717617A1 (fr) 1994-03-15 1995-09-22 Hager Electro Perfectionnement aux interrupteurs différentiels.
EP0773572A1 (fr) * 1995-11-08 1997-05-14 Legrand Appareil électrique à enclenchement brusque
US5931289A (en) * 1998-03-10 1999-08-03 Eaton Corporation Circuit breaker with quick closing mechanism
EP2061060A1 (fr) 2007-11-16 2009-05-20 Schneider Electric Industries SAS Appareil électrique de coupure tel un disjoncteur ou un interrupteur

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5539167A (en) * 1994-02-14 1996-07-23 Square D. Company Blade suspension assemlby for a circuit breaker
US6563407B2 (en) * 2001-08-21 2003-05-13 Siemens Energy & Automation, Inc. Pivot joint for a movable contact arm in a molded case circuit breaker
JP4059058B2 (ja) * 2002-10-28 2008-03-12 富士電機機器制御株式会社 回路しゃ断器
CN100428391C (zh) * 2006-07-20 2008-10-22 常熟开关制造有限公司(原常熟开关厂) 断路器操作机构的脱扣装置
ITBG20060054A1 (it) * 2006-10-13 2008-04-14 Abb Service Srl Dispositivo di bassa tensione con equipaggio mobile rinforzato
JP5134085B2 (ja) * 2008-08-06 2013-01-30 三菱電機株式会社 回路遮断器の可動接触子装置
CN102110553B (zh) * 2011-03-07 2013-01-16 法泰电器(江苏)股份有限公司 选择性保护开关操作机构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686453A1 (fr) 1992-01-17 1993-07-23 Legrand Sa Interrupteur differentiel.
FR2717617A1 (fr) 1994-03-15 1995-09-22 Hager Electro Perfectionnement aux interrupteurs différentiels.
EP0773572A1 (fr) * 1995-11-08 1997-05-14 Legrand Appareil électrique à enclenchement brusque
US5931289A (en) * 1998-03-10 1999-08-03 Eaton Corporation Circuit breaker with quick closing mechanism
EP2061060A1 (fr) 2007-11-16 2009-05-20 Schneider Electric Industries SAS Appareil électrique de coupure tel un disjoncteur ou un interrupteur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104599913B (zh) * 2015-01-21 2016-08-24 温州高能电气有限公司 一种漏电断路器

Also Published As

Publication number Publication date
EP2816577B1 (fr) 2016-03-30
ITMI20131034A1 (it) 2014-12-22
CN104241052A (zh) 2014-12-24
ES2569948T3 (es) 2016-05-13
CN104241052B (zh) 2017-11-28

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