CN102386034B - Static contact system of breaker - Google Patents
Static contact system of breaker Download PDFInfo
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- CN102386034B CN102386034B CN201110320217.7A CN201110320217A CN102386034B CN 102386034 B CN102386034 B CN 102386034B CN 201110320217 A CN201110320217 A CN 201110320217A CN 102386034 B CN102386034 B CN 102386034B
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- fixed contact
- iron core
- contact
- connecting plate
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Abstract
The invention relates to a breaker, especially relates to a static contact system on the breaker. The static contact system of the breaker is characterized in that: a static contact comprises: a coupling end and a contact end; the coupling end of the static contact is arranged on a static contact support through a rotation supporting shaft and a resetting torsion spring; the contact end of the static contact is placed on an upper side of a connection plate; after the static contact is arranged on the connection plate through the static contact support, the static contact and the connection plate respectively form one isolated opposite side; a moving iron core is fixedly arranged on the isolated opposite side of the static contact; a static iron core which cooperates with the moving iron core on the static contact is arranged on the isolated opposite side of the connection plate or a reverse side of the isolated opposite side of the connection plate. Through using the system, in the invention, a electromagnetic attraction structure is newly increased based on the prior art. By using the novel static contact system of the breaker, a current limiting capability of a contact short-circuit current can be improved.
Description
Technical field
The present invention relates to a kind of circuit breaker, refer to especially the static contact system on circuit breaker.
Background technology
The flow restriction of the static contact system of existing circuit breaker, be mainly " U " type structure, the opposite direction that this structure mainly flows through fixed contact and moving contact by electric current produces electrodynamic repulsion force and is scolded and start contact or fixed contact, its stroke of scolding out along with contact of this structure is larger, electrodynamic repulsion force can be less, when electrodynamic repulsion force is reduced to while not overcoming the touch spring counter-force, contact can fall again, is unfavorable for the contact blow-out.
Summary of the invention
The present invention overcomes the problem that prior art exists, and newly increases a kind of electromagnetic attraction structure on existing basis, the static contact system of the novel circuit breaker of the current limiting capacity of raising contact short circuit current.
Realize above-mentioned purpose, the present invention adopts following technical scheme: a kind of static contact system of circuit breaker, include connecting plate, stationary contact bracket and fixed contact, wherein fixed contact is arranged on connecting plate by stationary contact bracket, between fixed contact and connecting plate, by flexible connection, realize being electrically connected to, it is characterized in that: described fixed contact includes link and tip side, the link of described fixed contact is arranged on stationary contact bracket by swivel bearing axle and reduction torsion spring, described stationary contact bracket is fixedly installed on an end of connecting plate, the tip side of described fixed contact is placed in the connecting plate upside, be provided with the limit shaft that can rotate to the moving contact of breaker side when the initial position with fixed contact link conflict engagement limits fixed contact on described stationary contact bracket, after described fixed contact is arranged on connecting plate by stationary contact bracket, fixed contact and connecting plate form respectively an isolation opposite face, be fixedly installed moving iron core on the isolation opposite face of described fixed contact, be fixedly installed the static iron core coordinated with moving iron core on fixed contact on the isolation opposite face of described connecting plate or on the reverse side of the isolation opposite face of connecting plate.
By adopting such scheme, the present invention increases a kind of electromagnetic attraction structure, when short circuit current when being arranged on the static iron core of connecting plate bottom, moving iron core on magnetic field adhesive fixed contact of static iron core moment generation, thereby the effect that moving iron core band dynamic/static contact overcomes reduction torsion spring is down moved, fixed contact is more close to static iron core, its magnetic field is larger, the speed that fixed contact down moves is just faster, solved the defect of electrodynamic repulsion force structure, thereby improved the current limiting capacity of contact short circuit current, the present invention scolds out fixed contact to move downward to pull open electric arc and carries out short circuit current limitation except the opposite direction that can utilize short circuit current and flow through fixed contact and moving contact produces electrodynamic repulsion force, can also before reaching fixed contact, electric current can not produce electromagnetism magnetic field by the static iron core current flowing that is arranged on the connecting plate bottom, thereby inhale moving be arranged on moving iron core on fixed contact down rapid movement shorten product disjunction arcing time limiting short-circuit current, move downward fast and pull open electric arc under can the two power synthesis by electromagnetic attraction and electrodynamic repulsion force during the fixed contact short circuit of this static contact system, shorten the product disjunction arcing time, thereby reduce product short circuit Joule integral energy and improve its current limiting capacity.
The further setting of the present invention is: be fixedly installed moving iron core guard shield on described fixed contact, described moving iron core guard shield comprises dual-side and a top margin, form a breach exposed for the contact of fixed contact between dual-side and top margin, extend and be provided with baffle plate respectively on described dual-side, this baffle plate covers on the part that is exposed to fixed contact of moving iron core, described static iron core is fixedly installed on the reverse side of isolation opposite face of connecting plate, its both sides of static iron core are wider than the connecting plate part and form blocking arm to the bending of fixed contact direction, can be inconsistent with the blocking arm of static iron core when the width of described moving iron core and the width of static iron core quite descend down to the moving iron core of formation, the fixed contact place of pressing close to fixed contact on described connecting plate is provided with arc leading angle, on described stationary contact bracket, is covered with protective cover.
The purpose further arranged is, takes into full account to set on the basis of properties of product superiority, and wherein moving iron core guard shield prevents that electric arc burn from moving iron core.
Below in conjunction with accompanying drawing, the invention will be further described.
The accompanying drawing explanation
The structural representation that Fig. 1 is the embodiment of the present invention;
The explosive view that Fig. 2 is Fig. 1;
Fig. 3 is the moving iron core shield structure schematic diagram in the embodiment of the present invention;
Fig. 4 is the moving core structure schematic diagram in the embodiment of the present invention;
Fig. 5 is the static iron core structural representation in the embodiment of the present invention.
Embodiment
As Figure 1-Figure 5, a kind of static contact system of circuit breaker, include connecting plate 1, stationary contact bracket 2 and fixed contact 3, wherein fixed contact 3 is arranged on connecting plate 1 by stationary contact bracket 2, between fixed contact 3 and connecting plate 1, by flexible connection 4, realize being electrically connected to, in embodiments of the present invention, described fixed contact 3 includes link 31 and tip side 32, the link 31 of described fixed contact 3 is arranged on stationary contact bracket 5 by swivel bearing axle 6 and reduction torsion spring 5, described stationary contact bracket 5 is fixedly installed on an end 11 of connecting plate 1, the tip side 32 of described fixed contact 3 is placed in connecting plate 1 upside, on described stationary contact bracket 5, be provided with can with fixed contact 3 link 31 conflict engagement limits fixed contacts 3 limit shaft 103 to moving contact of breaker 102 when the initial position, the initial position here refers to the circuit breaker position of fixed contact 3 under normal circumstances, after described fixed contact 3 is arranged on connecting plate 1 by stationary contact bracket 5, fixed contact 3 forms respectively an isolation opposite face with connecting plate 1, be fixedly installed moving iron core 7 on the isolation opposite face 33 of described fixed contact 3, be fixedly installed the static iron core 8 coordinated with moving iron core 7 on fixed contact 3 on the reverse side 13 of the isolation opposite face 12 of described connecting plate 1, static iron core 8 its both sides are wider than connecting plate 1 part and form blocking arm 81 to fixed contact 3 direction bendings, can be inconsistent with the blocking arm 81 of static iron core 8 when the width of the width of described moving iron core 7 and static iron core 8 quite descends down to the moving iron core 7 of formation, in embodiments of the present invention, we also can be arranged on static iron core 8 on the isolation opposite face 12 of connecting plate 1.
In embodiments of the present invention, be fixedly installed moving iron core guard shield 9 on described fixed contact 3, described moving iron core guard shield 9 comprises dual-side 91 and a top margin 92, form a breach 93 exposed for the contact of fixed contact 3 between dual-side 91 and top margin 92, extend and be provided with baffle plate 911 respectively on described dual-side 91, this baffle plate 911 covers on the part that is exposed to fixed contact 3 of moving iron core 7, the purpose arranged like this is fully to prevent that electric arc burn from moving iron core 7, the fixed contact place of pressing close to fixed contact 3 on described connecting plate 1 is provided with arc leading angle 10, be covered with protective cover 101 on described stationary contact bracket 2
Concrete operation logic: when circuit occurs that large short circuit current flows to fixed contact 3 from connecting plate 1, during short circuit current process static iron core 8 end, static iron core 8 is given birth to electromagnetism magnetic field, moving iron core 7 on fixed contact 3 is magnetized, fixed contact 3 overcomes reduction torsion spring 5 counter-forces, rotate for 6 times around fixed contact swivel bearing axle, touch the blocking arm 81 of static iron core 8; When short circuit current flows to the moving contact 102 of circuit breaker, due to from fixed contact 3 during to moving contact 102 sense of current be incorgruous, can also produce an electrodynamic repulsion force, the counter-force of scolding out fixed contact 3 to overcome fixed contact reduction torsion spring 5 is down moved.When short circuit current disappears, fixed contact 3 is reset to fixed contact 3 initial conditions under the effect of fixed contact reduction torsion spring 5, and the initial condition of fixed contact 3 is undertaken spacing by fixed contact 3 limit shafts 103.
Claims (3)
1. the static contact system of a circuit breaker, include connecting plate, stationary contact bracket and fixed contact, wherein fixed contact is arranged on connecting plate by stationary contact bracket, between fixed contact and connecting plate, by flexible connection, realize being electrically connected to, it is characterized in that: described fixed contact includes link and tip side, the link of described fixed contact is arranged on stationary contact bracket by swivel bearing axle and reduction torsion spring, described stationary contact bracket is fixedly installed on an end of connecting plate, the tip side of described fixed contact is placed in the connecting plate upside, be provided with the limit shaft that can rotate to the moving contact of breaker side when the initial position with fixed contact link conflict engagement limits fixed contact on described stationary contact bracket, after described fixed contact is arranged on connecting plate by stationary contact bracket, fixed contact and connecting plate form respectively an isolation opposite face, be fixedly installed moving iron core on the isolation opposite face of described fixed contact, be fixedly installed the static iron core coordinated with moving iron core on fixed contact on the isolation opposite face of described connecting plate or on the reverse side of the isolation opposite face of connecting plate.
2. the static contact system of circuit breaker according to claim 1, it is characterized in that: be fixedly installed moving iron core guard shield on described fixed contact, described moving iron core guard shield comprises dual-side and a top margin, form a breach exposed for the contact of fixed contact between dual-side and top margin, extend and be provided with baffle plate respectively on described dual-side, this baffle plate covers on the part that is exposed to fixed contact of moving iron core, described static iron core is fixedly installed on the reverse side of isolation opposite face of connecting plate, its both sides of static iron core are wider than the connecting plate part and form blocking arm to the bending of fixed contact direction, can be inconsistent with the blocking arm of static iron core when the width of described moving iron core and the width of static iron core quite descend down to the moving iron core of formation.
3. the static contact system of circuit breaker according to claim 1 and 2, it is characterized in that: the fixed contact place of pressing close to fixed contact on described connecting plate is provided with arc leading angle, on described stationary contact bracket, is covered with protective cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110320217.7A CN102386034B (en) | 2011-10-20 | 2011-10-20 | Static contact system of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110320217.7A CN102386034B (en) | 2011-10-20 | 2011-10-20 | Static contact system of breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102386034A CN102386034A (en) | 2012-03-21 |
| CN102386034B true CN102386034B (en) | 2014-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110320217.7A Active CN102386034B (en) | 2011-10-20 | 2011-10-20 | Static contact system of breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102386034B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6704542B2 (en) * | 2018-03-23 | 2020-06-03 | 三菱電機株式会社 | Trip device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4866403A (en) * | 1986-12-11 | 1989-09-12 | Sace S.P.A. Costruzioni Elettromeccaniche | Stationary contact for low-voltage circuit breakers |
| CN102184812A (en) * | 2011-05-03 | 2011-09-14 | 江苏辉能电气有限公司 | Movable static contact structure for plastic-shell circuit breaker |
| CN202230963U (en) * | 2011-10-20 | 2012-05-23 | 德力西电气有限公司 | Stationary contact system of circuit breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100492760B1 (en) * | 2003-05-27 | 2005-06-07 | 엘에스산전 주식회사 | Current-limiting circuit breaker |
-
2011
- 2011-10-20 CN CN201110320217.7A patent/CN102386034B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4866403A (en) * | 1986-12-11 | 1989-09-12 | Sace S.P.A. Costruzioni Elettromeccaniche | Stationary contact for low-voltage circuit breakers |
| CN102184812A (en) * | 2011-05-03 | 2011-09-14 | 江苏辉能电气有限公司 | Movable static contact structure for plastic-shell circuit breaker |
| CN202230963U (en) * | 2011-10-20 | 2012-05-23 | 德力西电气有限公司 | Stationary contact system of circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102386034A (en) | 2012-03-21 |
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