CN203055836U - Contact and arc-extinguishing system of universal type low-voltage circuit breaker - Google Patents
Contact and arc-extinguishing system of universal type low-voltage circuit breaker Download PDFInfo
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- CN203055836U CN203055836U CN 201220703058 CN201220703058U CN203055836U CN 203055836 U CN203055836 U CN 203055836U CN 201220703058 CN201220703058 CN 201220703058 CN 201220703058 U CN201220703058 U CN 201220703058U CN 203055836 U CN203055836 U CN 203055836U
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Abstract
The utility model relates to a contact and arc-extinguishing system of a universal type low-voltage circuit breaker. The contact and arc-extinguishing system comprises a moving contact fixed on a moving conducting rod, a static contact, a static contact end tab, a moving contact end tab, an arc-extinguishing grid sheet group formed by a plurality of iron grid sheets, an air outgoing channel and an air outlet, wherein the air outgoing channel and the air outlet are arranged at the upper end of the arc-extinguishing grid sheet group; and one grid sheet in the arc-extinguishing grid sheet group is extended towards the contact direction and is protruded forwardly. According to the utility model, with utilization of the structure of extension of one grid sheet in the iron grid sheet group towards the contact area, the arc is contact with the extended grid sheet in advance when moving to the arc-extinguish chamber and successfully enters other grid sheets at the rear under the guidance of the grid sheet. And because only one grid sheet is extended in the structure, little influence is caused on the magnetic field of the contact area and the short-term tolerance performance of the circuit breaker is also not influenced. Besides, because the extended grid sheet can cut the air flow entering the arc-extinguish chamber during the disjunction process into two branches of air flows in a front-back mode, the driving effect on the arc by the air flow can be improved beneficially, the arc can be pushed into the grid sheet arc-extinguish chamber, and the breaking property of the circuit breaker can be improved.
Description
[technical field]
The utility model belongs to the low-voltage electrical apparatus field, particularly a kind of contact of universal low-voltage circuit breaker and arc quenching system.
[background technology]
The universal low-voltage circuit breaker is used for low-voltage distribution system and uses as main switch, it can be connected under nominal load and cut-off distribution line, (for example overload and short circuit) automatic shutoff circuit under failure condition, and rely on dynamic and static contact to separate to realize load and isolated from power.The universal low-voltage circuit breaker generally belongs to the category-B circuit breaker (standard GB 14048-2) with selective protection; thereby its protective feature has short time delay function And it has been proposed the requirement of short time withstand current; namely when circuit is short-circuited; Duan Lu Qi No had in the time interval of disjunction short circuit current in subordinate, and this circuit breaker can not scolded by electrodynamic repulsion force and held.
The structure of prior art mesolow omnipotent breaker contact system and arc control device comprises: the arc extinguishing grid pieces group of being made up of multi-disc iron railings sheet; Flat moving contact run-on tab; Be fixed on the moving contact on the moving conductive rod; Fixed contact and fixed contact run-on tab; The contact arc-extinguishing system shell; The arc control device top cover that has venthole.In order to improve short circuit withstand capacity, the universal circuit breaker design of traditional band selection function, it is far away that arc extinguishing iron railings sheet leaves contact system, with magnetic field and the electromagnetic repulsion force that reduces to cause that contact is scolded out, the problem that this design brings is that the electric arc between contact lacks field drives power, the airflow field that adds plate shaped moving contact striking sheet formation is obstructed, makes electric arc be difficult for entering arc extinguishing grid pieces, influences the break performance of circuit breaker.
[utility model content]
The purpose of this utility model is to overcome the shortcoming of prior art, and a kind of contact and arc quenching system of universal low-voltage circuit breaker is provided.
For achieving the above object, the utility model is achieved by the following technical solutions.
A kind of contact of universal low-voltage circuit breaker and arc quenching system comprise: be fixed on the moving contact on the moving conductive rod; Fixed contact; The fixed contact run-on tab; The moving contact run-on tab; The arc extinguishing grid pieces group that a plurality of iron railings sheets are formed; And the contact arc-extinguishing system of the outlet passageway of arc extinguishing Gate sheet group upper end and gas outlet composition; A sheet grating sheet is given prominence to forward to the elongation of contact direction in the middle of the arc extinguishing Gate sheet group.
The utility model further improves and is: a sheet grating sheet of giving prominence to forward to the elongation of contact direction, and it is the grid sheet of rectangular flat plate grid sheet or both sides band leg, the recess of the grid sheet of both sides band leg is triangle, arc or other geometry.
The utility model further improves and is: to the elongation of contact direction and forward the position in the outstanding sheet grating sheet grid sheet group of getting is: a corresponding sheet grating sheet between the mid point of line and the moving contact run-on tab top between fixed contact run-on tab and moving contact run-on tab two tops.
The utility model further improves and is: a sheet grating sheet of giving prominence to forward to the elongation of contact direction, and its material is identical with other grid sheet in thickness and the arc extinguishing Gate sheet group, and material is all ferromagnet.
The utility model further improves and is: a sheet grating sheet of giving prominence to forward to the elongation of contact direction, and the length of its elongation is 1/3rd to 1/2nd of former length, if the grid sheet of both sides band leg, the length of its elongation is 1/2nd of former length.
The utility model further improves and is: two elongations and outstanding forward to three sheet grating sheets to the contact direction are arranged in the middle of the arc extinguishing Gate sheet group; If two, then the elongation of a slice is longer, another sheet is shorter, the adjacent setting of two sheet grating sheets; If three, then three adjacent settings, middle a slice is longer, length such as two in the both sides, front and back, form a pagoda shape.
With respect to prior art, the utlity model has following advantage: the utility model is by the structure of a sheet grating sheet in the middle of the iron railings sheet group to the contact regions elongation, allow electric arc in the arc control device motion process, contact with the grid sheet of this sheet elongation in advance, the air-flow that is produced by high arc temperature is behind this outstanding grid sheet on the other hand, be divided into two strands of air-flows, under this sheet grating sheet guiding, successfully enter other grid sheet at rear, this structure, because only sheet grating sheet elongation, thereby it is little to the contact regions influence of magnetic field, also namely can not have influence on the tolerance performance in short-term of circuit breaker, since the grid sheet of this sheet elongation can cut apart air-flow that breaking course enters arc control device become before and after two strands of air-flows, be conducive to improve air-flow to the driving effect of electric arc, promote electric arc and enter grating arc-extinguishing chamber.
[description of drawings]
Fig. 1 is contact and the arc quenching system structure chart of omnipotent breaker of the present utility model.
Fig. 2 is definite schematic diagram of stretching Long grid sheet position.
Fig. 3 is the comparison of general grid sheet with the elongation grid sheet of grid sheet group, and Fig. 3 a is general plate shaped grid sheet 6a, and Fig. 3 b is plate shaped elongation grid sheet 6b, and Fig. 3 c is the elongation grid sheet 6c of band vee, and Fig. 3 d is the elongation grid sheet 6d of band arc notch.
Fig. 4 is that the elongation grid sheet of band vee is at the scheme of installation of contact arc-extinguishing system.
Fig. 5 is contact and the arc quenching system structure chart of omnipotent breaker of the present utility model; Wherein the outstanding grid sheet of elongation is three, and wherein 6b is the long grid sheet of elongation, and 6e is the short grid sheet of elongation, and the shape of the grid sheet of elongation can be plate shaped, triangle, arc or other shape.
Fig. 6 is contact and the arc quenching system structure chart of omnipotent breaker of the present utility model; Wherein the outstanding grid sheet of elongation is two.
The model machine that Fig. 7 makes for the utility model test oscillogram of knowing the real situation; Wherein Fig. 7 a divides (0) for the first time, and 7b is for closing for the first time branch (CO1), and 7c is for closing for the second time branch (CO2).
In the accompanying drawing: 1 is moving conductive rod; 2 is moving contact rack; 3 is fixed contact; 4 is the fixed contact run-on tab; 5 is the moving contact run-on tab; 6 is the arc extinguishing grid pieces group; 7 are arc control device insulation inner casing; 8 is the exhaust outlet guide plate; 9 is the arc control device top cover; 10 is support; 11 is moving contact, and 12 is touch spring.
[embodiment]
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
See also Fig. 1 to shown in Figure 6, contact and the arc quenching system of a kind of universal low-voltage circuit breaker of the utility model, it has: be fixed on the moving contact 11 on the moving conductive rod 1; Fixed contact 3; Fixed contact run-on tab 4; Moving contact run-on tab 5; The arc extinguishing grid pieces group 6 that a plurality of iron railings sheets are formed; And the contact arc-extinguishing system of the outlet passageway of arc extinguishing Gate sheet group 6 upper ends and gas outlet composition; A sheet grating sheet is given prominence to forward to the elongation of contact direction in the middle of the arc extinguishing grid pieces group 6.Touch spring 12 also is installed on the moving conductive rod 1, and moving conductive rod 1 is installed on the moving contact rack 2.Moving contact rack 2 is driven by operating mechanism; Arc control device insulation inner casing 7, not only being used for fixedly arc extinguishing grid pieces group 6 ， And and top has exhaust outlet guide plate 8, by the exhaust passage of exhaust outlet guide plate 8, can drain into the external world to thermal current in the interrupting process by exhaust outlet on the arc control device top cover 9; The contact of omnipotent breaker and arc quenching system are installed in the sealing insulation crust that comprises support 10 formation.
A sheet grating sheet of giving prominence to forward to the elongation of contact direction, it can be rectangular flat plate grid sheets, also can be the grid sheet of both sides band leg, its recess can be triangle, arc or other shape.
A sheet grating sheet of giving prominence to forward to the elongation of contact direction in the corresponding grid sheet of distance, is got the sheet grating sheet near the centre position in the position of arc extinguishing grid pieces group 6 between fixed contact run-on tab 4 and 5 liang of tops of moving contact run-on tab.
A sheet grating sheet of giving prominence to forward to the elongation of contact direction, its material is identical with other grid sheet with thickness, and material is all ferromagnet.
The extended length of a sheet grating sheet of giving prominence to forward to the elongation of contact direction is 1/3rd to 1/2nd of former length (other does not extend the grid sheet), if the grid plate shape band leg of elongation then should be got big value.
The grid sheet of giving prominence to forward to the elongation of contact direction also can increase to two to three, but wherein except a slice is long, other one to two sheet grating sheet elongation is less, if three, then put long in the centre, two isometric weak points in hithermost both sides, form a pagoda shape, if two, then shortly be placed on long hithermost either side.
Take sheet grating sheets in the middle of the arc extinguishing grid pieces group 6 as what accompanying drawing 1 the utility model proposes, structure to the contact regions elongation, allow electric arc in the arc control device motion process, contact with the grid sheet of this sheet elongation in advance, under this sheet grating sheet guiding, successfully enter other grid sheet at rear, elongation grid sheet thickness is identical with other grid sheet, material also is ferromagnet, the length of elongation is got 1/3rd to 1/2nd of raw footage, the position of elongation grid sheet determines that by accompanying drawing 2 getting moving contact run-on tab 5 tops is a, and the top of fixed contact run-on tab 4 is b, the central point of its line ab is O, and the position of then extending the grid sheet can be taken at an O and put a sheet grating sheet corresponding between a distance.
Accompanying drawing 3 be several elongation grid sheets shape and with the comparison of general grid sheet, the general plate shaped grid sheet 6a of Fig. 3 a for not extending, the shape of elongation grid sheet can be front end band breach or not be with breach, be not with breach to be plate shaped grid sheet (Fig. 3 b), breach can be triangle (Fig. 3 c), arc (Fig. 3 d) or other shape, if band notch geometry, the both sides two legs of its formation is to strengthen the effect that electric arc is drawn in magnetic field, for guaranteeing rear end cutting part length, then elongation can slightly strengthen, but is difficult for surpassing ab line line.Accompanying drawing 4 is that the elongation grid sheet of band vee is in the installation of contact arc-extinguishing system.
The outstanding grid sheet of the Chang And of Shen also can increase to two to three, but wherein except a slice is long, other one to two sheet grating sheet elongation is less, it is three that accompanying drawing 5 is got the outstanding grid sheet of elongation, then place long in the centre, two isometric weak points in hithermost both sides, form a pagoda shape, it is two that accompanying drawing 6 is got the outstanding grid sheet of elongation, then shortly is placed on long hithermost either side.
In order to confirm that a sheet grating sheet in the middle of the arc extinguishing grid pieces group is stretched the moving contact electrodynamic repulsion force of Long to be influenced very little, be universal circuit breaker contact and the arc quenching system of 4000A to a rated current, in other structure and size all under the constant condition, grid sheet group there are not a slice elongation grid sheet and two kinds of situations that a slice elongation is arranged, be the electrodynamic repulsion force of 100kA condition lower moving contact at short circuit current with three dimension finite element method, result of calculation sees Table one, can be found out by table one: after a sheet grating sheet extends in the middle of having had, the moving contact electrodynamic repulsion force only increases by 0.281%, as seen Bian has improved the circuit breaker break performance after with the utility model, and during to circuit breaker short anti-be subjected to can power And not have obviously influence.
Elongation grid sheet situation in the middle of table one has or not, electrodynamic repulsion force contrast on the moving contact
| ? | Original | Middle sheet grating sheet elongation |
| Moving contact electrodynamic repulsion force (N.m) | 7.40737024 | 7.428206 |
| |
0% | 0.281% |
In order to confirm effect of the present utility model, made a model machine, rated voltage 400V, Sales frame electric current 4000A has carried out the test of knowing the real situation at the network experiment station of authorized by state, and specified operation short circuit breaking capacity Ics=100kA has been passed through in test.Fig. 7 a, 7b and 7c are the test oscillogram, and wherein Fig. 7 a divides (0) for the first time, and 7b is for closing for the first time branch (CO1), and 7c is for closing for the second time branch (CO2).
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art, in not breaking away from the technical solutions of the utility model scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, any simple modification that foundation technical spirit of the present utility model is done above embodiment, equivalent variations and modification still belong in the scope of technical solutions of the utility model.
Claims (6)
1. the contact of a universal low-voltage circuit breaker and arc quenching system comprise: be fixed on the arc extinguishing grid pieces group that moving contact, fixed contact, fixed contact run-on tab, moving contact run-on tab, a plurality of iron railings sheet on the moving conductive rod are formed; And the contact arc-extinguishing system of the outlet passageway of arc extinguishing Gate sheet group upper end and gas outlet composition; It is characterized in that: a sheet grating sheet is given prominence to forward to the elongation of contact direction in the middle of the arc extinguishing Gate sheet group.
2. the contact of universal low-voltage circuit breaker as claimed in claim 1 and arc quenching system, it is characterized in that, a sheet grating sheet of giving prominence to forward to the elongation of contact direction, it is the grid sheet of rectangular flat plate grid sheet or both sides band leg, and the recess of the grid sheet of both sides band leg is triangle, arc or other geometry.
3. the contact of universal low-voltage circuit breaker as claimed in claim 1 and arc quenching system, it is characterized in that to contact direction elongation and the forward outstanding position of a sheet grating sheet in grid sheet group is: a corresponding sheet grating sheet between the mid point of line and the moving contact run-on tab top between fixed contact run-on tab and moving contact run-on tab two tops.
4. the contact of universal low-voltage circuit breaker as claimed in claim 1 and arc quenching system is characterized in that, a sheet grating sheet of giving prominence to forward to the elongation of contact direction, and its material is identical with other grid sheet in thickness and the arc extinguishing Gate sheet group, and material is all ferromagnet.
5. the contact of universal low-voltage circuit breaker as claimed in claim 1 and arc quenching system is characterized in that, a sheet grating sheet of giving prominence to forward to the elongation of contact direction, and the length of its elongation is 1/3rd to 1/2nd of former length; If the grid sheet of both sides band leg, the length of its elongation are 1/2nd of former length.
6. the contact of universal low-voltage circuit breaker as claimed in claim 1 and arc quenching system is characterized in that, two elongations and outstanding forward to three sheet grating sheets to the contact direction are arranged in the middle of the arc extinguishing Gate sheet group; If two, then the elongation of a slice is longer, another sheet is shorter, the adjacent setting of two sheet grating sheets; If three, then three adjacent settings, a middle sheet grating sheet is longer, and the grid sheet of length such as two forms a pagoda shape in the both sides, front and back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220703058 CN203055836U (en) | 2012-12-18 | 2012-12-18 | Contact and arc-extinguishing system of universal type low-voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220703058 CN203055836U (en) | 2012-12-18 | 2012-12-18 | Contact and arc-extinguishing system of universal type low-voltage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203055836U true CN203055836U (en) | 2013-07-10 |
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ID=48738763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220703058 Expired - Lifetime CN203055836U (en) | 2012-12-18 | 2012-12-18 | Contact and arc-extinguishing system of universal type low-voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203055836U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065895A (en) * | 2012-12-18 | 2013-04-24 | 西安交通大学 | Contact and arc extinguishing system for universal type low-voltage circuit breaker |
| CN107293459A (en) * | 2016-03-30 | 2017-10-24 | 浙江正泰电器股份有限公司 | Miniature circuit breaker with polynary putting type arc extinguishing grid pieces |
| CN107452572A (en) * | 2017-08-15 | 2017-12-08 | 国网江苏省电力公司南京供电公司 | Arc Distinguishing Device for Circuit Breakers |
| CN107680891A (en) * | 2017-10-31 | 2018-02-09 | 首瑞（天津）电气设备有限公司 | A kind of contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system |
| CN117457453A (en) * | 2023-12-25 | 2024-01-26 | 浙江正泰电器股份有限公司 | Arc extinguishing structure of circuit breaker and circuit breaker |
-
2012
- 2012-12-18 CN CN 201220703058 patent/CN203055836U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065895A (en) * | 2012-12-18 | 2013-04-24 | 西安交通大学 | Contact and arc extinguishing system for universal type low-voltage circuit breaker |
| CN107293459A (en) * | 2016-03-30 | 2017-10-24 | 浙江正泰电器股份有限公司 | Miniature circuit breaker with polynary putting type arc extinguishing grid pieces |
| CN107452572A (en) * | 2017-08-15 | 2017-12-08 | 国网江苏省电力公司南京供电公司 | Arc Distinguishing Device for Circuit Breakers |
| CN107452572B (en) * | 2017-08-15 | 2019-12-17 | 国网江苏省电力公司南京供电公司 | Arc extinguishing device of circuit breaker |
| CN107680891A (en) * | 2017-10-31 | 2018-02-09 | 首瑞（天津）电气设备有限公司 | A kind of contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system |
| CN117457453A (en) * | 2023-12-25 | 2024-01-26 | 浙江正泰电器股份有限公司 | Arc extinguishing structure of circuit breaker and circuit breaker |
| CN117457453B (en) * | 2023-12-25 | 2024-04-30 | 浙江正泰电器股份有限公司 | Arc extinguishing structure of circuit breaker and circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |
|
| CX01 | Expiry of patent term |