CN104766770A - Static contact bracket of circuit breaker and circuit breaker - Google Patents

Static contact bracket of circuit breaker and circuit breaker Download PDF

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Publication number
CN104766770A
CN104766770A CN201410006862.5A CN201410006862A CN104766770A CN 104766770 A CN104766770 A CN 104766770A CN 201410006862 A CN201410006862 A CN 201410006862A CN 104766770 A CN104766770 A CN 104766770A
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CN
China
Prior art keywords
circuit breaker
base layer
contact
bracket
layer
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
CN201410006862.5A
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Chinese (zh)
Other versions
CN104766770B (en
Inventor
包章尧
周纲
汪洋
沈先
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
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Application filed by Siemens AG filed Critical Siemens AG
Priority to CN201410006862.5A priority Critical patent/CN104766770B/en
Priority to EP14197126.7A priority patent/EP2905794B1/en
Publication of CN104766770A publication Critical patent/CN104766770A/en
Application granted granted Critical
Publication of CN104766770B publication Critical patent/CN104766770B/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/025—Composite material having copper as the basic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts 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
    • H01H1/225—Contacts 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 the supporting member being pivotable

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Abstract

A static contact bracket (12) of a circuit breaker comprises a basic body layer (122) and an enhancement layer (124). The basic body layer is made of a material with good electricity conduction and heat conduction performance. The enhancement layer is stacked on the basic body layer and made of a material with good mechanical strength and magnetic conduction performance. As the basic body layer has good electricity conduction and heat conduction performance, small heat is generated on one hand, and on the other hand, the basic body layer can enable the static contact bracket to cool an electric arc to help to extinguish the electric arc. According to the enhancement layer, on one hand, the mechanical strength of the basic body layer can be enhanced, and on the other hand, the magnetic conduction enhancement layer can guide the electric arc to enter an arc-extinguishing mechanism of the circuit breaker so as to enable the electric arc to be quickly extinguished. In addition, the basic body layer and the enhancement layer stacked together can be conveniently assembled to the circuit breaker.

Description

The stationary contact bracket of circuit breaker and circuit breaker thereof
Technical field
The present invention relates to a kind of stationary contact bracket, particularly relate to a kind of stationary contact bracket for miniature circuit breaker.
Background technology
In miniature circuit breaker, by being contacting and separating of moving contact and fixed contact, can connect, carry and electric current under point deenergizing normal running conditions.Meanwhile, miniature circuit breaker can also in the situation of regulation, the abnormal operating conditions such as such as overload, open circuit, carrying and the improper electric current of disjunction within the regular hour.
Fixed contact is installed on stationary contact bracket.When moving contact is separated with fixed contact, stationary contact bracket assume responsibility for very large electric current, needs to guide the electric arc produced between dynamic and static contact into arrange in circuit breaker arc quenching system simultaneously.Existing stationary contact bracket is by steel copper facing, or fine copper is made.Steel copper-plated fixed contact mounting bracket has fine mechanical strength, but resistivity is high, and during loaded current, caloric value is large.The fixed contact mounting bracket resistivity of fine copper is little, but mechanical strength is low, and permeability is very little, cannot extinguish the electric arc produced between dynamic and static contact.
Summary of the invention
The object of this invention is to provide a kind of stationary contact bracket of circuit breaker, it can help to extinguish the electric arc produced between moving contact and fixed contact in circuit breaker.
Another object of the present invention is to provide the circuit breaker using this stationary contact bracket.
The invention provides a kind of stationary contact bracket of circuit breaker, comprise a base layer and a strengthening layer.Base layer is for transmitting the electric current passed through in circuit breaker.Strengthening layer is superimposed on base layer, and it can be base layer and provides support structure, and strengthening layer can attract the electric arc produced between moving contact and fixed contact in circuit breaker to enter the arc-extinguishing mechanism of circuit breaker.
In the stationary contact bracket of circuit breaker, the base layer of conduction, when electric current can be made to flow in stationary contact bracket on the one hand, produces little heat; The heat conductivility that base layer is good on the other hand can make stationary contact bracket be electric arc cooling, helps extinguish arcs.Strengthening layer has good mechanical strength and magnetic property, can strengthen the mechanical strength of base layer on the one hand; On the other hand magnetic conduction strengthening layer can enter the arc-extinguishing mechanism of circuit breaker by pilot arc, thus realizes the extinguish fast of electric arc.Meanwhile, the base layer be superimposed together and strengthening layer can be assembled in circuit breaker easily.
In another schematic execution mode of the stationary contact bracket of circuit breaker, base layer is prepared by metallic copper.
In the schematic execution mode of the another kind of the stationary contact bracket of circuit breaker, strengthening layer is prepared by steel.
In another schematic execution mode of the stationary contact bracket of circuit breaker, strengthening layer and base layer are superimposed together by double-metal composite technique.
In another schematic execution mode of the stationary contact bracket of circuit breaker, the thickness of base layer and the Thickness Ratio of strengthening layer are 1 ~ 2.5:1.
Present invention also offers a kind of circuit breaker, comprise a moving contact component and a static contact component.Moving contact component comprises the moving contact that a moving contact rack and are arranged at moving contact rack.Static contact component comprises an above-mentioned stationary contact bracket and is arranged at stationary contact bracket with one and the fixed contact that can contact with moving contact.
In another schematic execution mode of circuit breaker, in stationary contact bracket, close moving contact component side is base layer, and is strengthening layer away from moving contact component side.
In the schematic execution mode of the another kind of circuit breaker, fixed contact is connected to base layer.
Accompanying drawing explanation
The following drawings only schematically illustrates the present invention and explains, not delimit the scope of the invention.
Fig. 1 is for illustration of the structural representation of a kind of exemplary embodiment of stationary contact bracket of circuit breaker.
Label declaration
10 static contact components
12 stationary contact bracket
122 base layers
124 strengthening layers
14 fixed contacts
20 moving contact components
22 moving contact racks
24 moving contacts.
Embodiment
In order to the technical characteristic to invention, object and effect have understanding clearly, now contrast accompanying drawing and the specific embodiment of the present invention is described, label identical in the various figures represents identical part.
In this article, " schematically " expression " serves as example, example or explanation ", not should by being described to any diagram of " schematically " in this article, execution mode is interpreted as a kind of preferred or have more the technical scheme of advantage.
For making simplified form, only schematically show part related to the present invention in each figure, they do not represent its practical structures as product.In addition, be convenient to make simplified form understand, there are the parts of same structure or function in some figure, only schematically depict one of them, or only marked one of them.
In this article, " one " not only represents " only this ", also can represent the situation of " more than one ".
In this article, " on ", D score, "front", "rear", "left", "right" etc. only for representing the position relationship between relevant portion, and their absolute position non-limiting.
Fig. 1 is for illustration of the structural representation of a kind of exemplary embodiment of stationary contact bracket of circuit breaker.As shown in the figure, circuit breaker comprises a static contact component 10 and a moving contact component 20.
Wherein, static contact component 10 comprises a stationary contact bracket 12 and a fixed contact 14.Fixed contact 14 can be installed on stationary contact bracket 12.
Stationary contact bracket 12 comprises a base layer 122 and a strengthening layer 124, and strengthening layer 124 is superimposed on base layer 122.Base layer 122 is prepared from by the material with good heat conductive and electric conductivity, such as metallic copper, and strengthening layer 124 is prepared from by the material with good mechanical strength and magnetic property, such as steel.In a kind of exemplary embodiment of the stationary contact bracket of circuit breaker, strengthening layer 124 is superimposed on base layer 122 by double-metal composite technique.
Moving contact component 20 comprises a moving contact rack 22 and a moving contact 24, and moving contact 24 can be installed on moving contact rack 22.
In a kind of exemplary embodiment of the stationary contact bracket of circuit breaker, in stationary contact bracket 12, be base layer 122 near the side of moving contact component 20, and be strengthening layer 124 away from the side of moving contact component 20.The fixed contact 14 contacted with moving contact 24 is connected to base layer 122.In this layout type, conduction and the thermally conductive pathways of fixed contact and base layer composition are the shortest, and strengthening layer can provide mechanical support for base layer simultaneously, and attract the electric arc between moving contact and fixed contact to enter arc-extinguishing mechanism.
In the stationary contact bracket of circuit breaker, base layer has good conduction and heat conductivility, when electric current can be made to flow in stationary contact bracket on the one hand, produces little heat; The heat conductivility that base layer is good on the other hand can make stationary contact bracket be electric arc cooling, helps extinguish arcs.Strengthening layer has good mechanical strength and magnetic property, can strengthen the mechanical strength of base layer on the one hand; On the other hand magnetic conduction strengthening layer can enter the arc-extinguishing mechanism of circuit breaker by pilot arc, thus realizes the extinguish fast of electric arc.Meanwhile, the base layer be superimposed together and strengthening layer can be assembled in circuit breaker easily.
In a kind of exemplary embodiment of the stationary contact bracket of circuit breaker, by adjusting the thickness proportion relation of base layer and strengthening layer, the heat conductivility of stationary contact bracket, electric conductivity, mechanical strength and magnetic property can be regulated accordingly.When base layer have comparatively heavy thickness time, stationary contact bracket has good heat conductivility and electric conductivity, and when strengthening layer have comparatively heavy thickness time, stationary contact bracket has good mechanical strength and magnetic property.The Thickness Ratio of such as base layer and strengthening layer is 2.5:1, or 1:1.
Be to be understood that, although this specification describes according to each embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
A series of detailed description listed is above only illustrating for possible embodiments of the present invention; they are also not used to limit the scope of the invention; allly do not depart from the skill of the present invention equivalent embodiments done of spirit or change; as the combination of feature, segmentation or repetition, all should be included within protection scope of the present invention.

Claims (8)

1. the stationary contact bracket (12) of circuit breaker, is characterized in that it comprises:
One for transmitting the base layer (122) by electric current in described circuit breaker; With
A strengthening layer (124) being superimposed on described base layer (122), it can be described base layer (122) and provides support structure, and described strengthening layer (124) can attract the electric arc produced between moving contact and fixed contact in described circuit breaker to enter the arc-extinguishing mechanism of described circuit breaker.
2. the stationary contact bracket of circuit breaker as claimed in claim 1, wherein said base layer (122) is prepared by metallic copper.
3. the stationary contact bracket of circuit breaker as claimed in claim 1, wherein said strengthening layer (124) is prepared by steel.
4. the stationary contact bracket of circuit breaker as claimed in claim 1, wherein said strengthening layer (124) and described base layer (122) are superimposed together by double-metal composite technique.
5. the stationary contact bracket of circuit breaker as claimed in claim 1, the thickness of wherein said base layer and the Thickness Ratio of described strengthening layer are 1 ~ 2.5:1.
6. circuit breaker, is characterized in that it comprises:
A moving contact component (20), it comprises a moving contact rack (22), and a moving contact (24) being arranged at described moving contact rack (22); With
A static contact component (10), it comprises a stationary contact bracket (12) as described in claim 1 to 5 any one; Described stationary contact bracket (10) is arranged at and the fixed contact (14) that can contact with described moving contact (24) with one.
7. circuit breaker as claimed in claim 6, in wherein said stationary contact bracket (12), close described moving contact component (20) side is described base layer (122), and is described strengthening layer (124) away from described moving contact component (20) side.
8. circuit breaker as claimed in claim 7, wherein said fixed contact (14) is connected to described base layer (122).
CN201410006862.5A 2014-01-07 2014-01-07 The stationary contact bracket and its breaker of breaker Active CN104766770B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201410006862.5A CN104766770B (en) 2014-01-07 2014-01-07 The stationary contact bracket and its breaker of breaker
EP14197126.7A EP2905794B1 (en) 2014-01-07 2014-12-10 Static contact support for circuit breaker and circuit breaker thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410006862.5A CN104766770B (en) 2014-01-07 2014-01-07 The stationary contact bracket and its breaker of breaker

Publications (2)

Publication Number Publication Date
CN104766770A true CN104766770A (en) 2015-07-08
CN104766770B CN104766770B (en) 2017-09-08

Family

ID=52013957

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410006862.5A Active CN104766770B (en) 2014-01-07 2014-01-07 The stationary contact bracket and its breaker of breaker

Country Status (2)

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EP (1) EP2905794B1 (en)
CN (1) CN104766770B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106783428A (en) * 2016-10-13 2017-05-31 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） A kind of combined repulsion dish for electromagnetic repulsion mechanism

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CN2188237Y (en) * 1993-12-09 1995-01-25 中南工学院 Knife switch with strengthened elastic contact conductor element
US6320149B1 (en) * 1998-07-07 2001-11-20 Abb Research Ltd. Current contact system for a current switch
CN2924772Y (en) * 2005-12-05 2007-07-18 北京Abb低压电器有限公司 Static contact base, arc-quenching system for miniature circuit breaker and miniature circuit breaker
US20080199716A1 (en) * 2005-05-11 2008-08-21 Abb Service S.R.L. Multiple Component Electrical Contact
CN201622989U (en) * 2009-11-26 2010-11-03 无锡唯特电气技术有限公司 Miniature circuit breaker with high breaking capacity
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CN202473620U (en) * 2012-03-12 2012-10-03 毕新华 Copper and steel integrated static contact
CN202585291U (en) * 2012-05-16 2012-12-05 上海良信电器股份有限公司 Integrated thermomagnetic system supporting frame of small-size circuit breaker

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2188237Y (en) * 1993-12-09 1995-01-25 中南工学院 Knife switch with strengthened elastic contact conductor element
US6320149B1 (en) * 1998-07-07 2001-11-20 Abb Research Ltd. Current contact system for a current switch
US20080199716A1 (en) * 2005-05-11 2008-08-21 Abb Service S.R.L. Multiple Component Electrical Contact
CN2924772Y (en) * 2005-12-05 2007-07-18 北京Abb低压电器有限公司 Static contact base, arc-quenching system for miniature circuit breaker and miniature circuit breaker
CN201622989U (en) * 2009-11-26 2010-11-03 无锡唯特电气技术有限公司 Miniature circuit breaker with high breaking capacity
CN201673850U (en) * 2010-04-26 2010-12-15 南京业基电气设备有限公司 Load switch main-loop movable, static contact device
CN202473620U (en) * 2012-03-12 2012-10-03 毕新华 Copper and steel integrated static contact
CN202585291U (en) * 2012-05-16 2012-12-05 上海良信电器股份有限公司 Integrated thermomagnetic system supporting frame of small-size circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106783428A (en) * 2016-10-13 2017-05-31 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） A kind of combined repulsion dish for electromagnetic repulsion mechanism

Also Published As

Publication number Publication date
CN104766770B (en) 2017-09-08
EP2905794B1 (en) 2018-04-25
EP2905794A1 (en) 2015-08-12

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