CN101055807A - AC contactor bar arc-quenching chamber with the double arc slice - Google Patents
AC contactor bar arc-quenching chamber with the double arc slice Download PDFInfo
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- CN101055807A CN101055807A CN 200710017488 CN200710017488A CN101055807A CN 101055807 A CN101055807 A CN 101055807A CN 200710017488 CN200710017488 CN 200710017488 CN 200710017488 A CN200710017488 A CN 200710017488A CN 101055807 A CN101055807 A CN 101055807A
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- arc
- sheet
- estinguishing
- grid chip
- striking
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Abstract
The invention discloses an alternating contactor grid chip arc-estinguishing chamber with a double arc sheet, comprising a movable contact, an immovable contact, and an arc-estinguishing cover, a ferromagnetic arc-estinguishing grid chip set which is orderly arranged upright to a floor of the arc-estinguishing chamber is configured in the arc-estinguishing cover, the ferromagnetic arc-estinguishing grid chip set composes a double arc strike ferromagnetic arc-estinguishing grid chip set by a U-shape arc sheet, a middle grid chip set and an L-shape arc sheet, a grid chip of the middle grid chip set adjacent to the L-shape arc sheet has a smaller length, an air outlet hole is provided on the arc-estinguishing cover. In the double arc sheet ferromagnetic arc-estinguishing grid chip set of the invention, the L-shape arc sheet acts a function of a rear end arc sheet and is homologous to a grid chip, and synthetizes two advantages of unpright and parrallel arranging the grid chip, the U-shape arc sheet acts a function of a front end arc sheet, and is homologous to a upright arranged grid chip. The double arc sheet is good for guiding an electric arc into the grid chip arc-estinguishing chamber, and increases effect of cutting the electric arc, thereby improving a turn-on/off performace of the contactor and an electric life time under a 660 v and AC-4 work condition.
Description
Technical field
The invention belongs to the low-voltage electrical apparatus field, be specifically related to a kind of arc control device that are used for the dual striking sheet of intermediate size straight-style ac contactor band.
Background technology
Contactor is as the control apparatus of frequent operation, electric life is one of its most important performance index, wherein AC-4 use classes condition of work is very harsh, because it requires frequent crawl squirrel-cage motor, promptly under rated voltage, connect and 6 times of rated current of disjunction, and the line power factor is lower, and existing both at home and abroad contactor all must reduce grade of rated current under 660 volts of this conditions of work uses.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of AC contactor bar sheet arc control device with dual striking sheet are proposed, this is with the AC contactor bar sheet arc control device of dual striking sheet, can increase substantially the connecting-disconnecting function and the electrical endurance of contactor, thus can be under 660 volts of AC-4 conditions of work etc. electric current use.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of AC contactor bar sheet arc control device with dual striking sheet, comprise bridge-type moving contact, fixed contact and arc-extinguish chamber, dispose the ferromagnetic arc extinguishing grid pieces group that is arranged in order and vertically place with the arc control device bottom surface in the arc-extinguish chamber, it is characterized in that, described ferromagnetic arc extinguishing grid pieces group constitutes the ferromagnetic arc extinguishing grid pieces group of dual striking by U-shaped striking sheet, middle grid sheet group and L shaped striking sheet, middle grid sheet group is shorter near a sheet grating leaf length of striking sheet, and the top of arc-extinguish chamber has venthole.
The ferromagnetic arc extinguishing grid pieces group of above-mentioned dual striking is arranged in order in the moving contact both sides, and it is U-shaped striking sheet, middle grid sheet group, L shaped striking sheet in proper order.
The present invention makes arc extinguishing grid pieces constitute the ferromagnetic arc extinguishing grid pieces group of dual striking, U-shaped and L shaped striking sheet can play pilot arc, be equivalent to a sheet grating sheet again, participate in arc cutting, particularly be put in the L shaped striking sheet of grid sheet group rear end, its bottom is outstanding to contact regions, at the arc motion initial stage, can contact with electric arc, pilot arc enters grid sheet group, play the grid sheet effect of the parallel placement of a slice simultaneously, in advance arc cutting.
Description of drawings
Fig. 1 is a structure principle chart of the present invention.
Fig. 2 is the structure principle chart of striking sheet of the present invention (2), and wherein figure (a) is a front view, and figure (b) is the right view of figure (a), and figure (c) is the vertical view of figure (a).
Fig. 3 is the structure principle chart of striking sheet of the present invention (4), and wherein figure (a) is a front view, and figure (b) is the right view of figure (a).
Fig. 4 is the comparison diagram of structure of the present invention and traditional structure, and wherein (a) is arc control device A structure of the present invention, (b) traditional arc control device B structure.
Fig. 5 is that the present invention and traditional structure are restriked the probability histogram relatively.
Fig. 6 is that the present invention and traditional structure electric arc before and after current over-zero enter grid sheet situation comparison diagram.Wherein figure (a) and figure (b) be respectively the current over-zero of traditional structure before moment with current over-zero schematic diagram after moment; Figure (c) is a structure current over-zero moment schematic diagram of the present invention.
Below in conjunction with accompanying drawing structure of the present invention and operation principle are elaborated.
Embodiment
Improve the electric life and the connecting-disconnecting function of A.C. contactor under 660 volts, AC-4 condition, be decided by the performance of arc control device.The extinguishing of alternating current arc is decided by the contrast of media recovery process and arc-gap voltage recovery process after the arc current zero passage, and the former is better than the latter, arc extinction, on the contrary then restrike.Ferromagnetic grid sheet group can be divided into short arc with electric arc, allow each short arc because cathode sheath layer (near cathodic process) obtains about 100～300 volts dielectric strength in moment behind the current over-zero, but prerequisite is to allow electric arc enter the grid sheet.The arc control device of the vertical or parallel placement of traditional grid sheet, it is the key issue that influences contactor electric life and break performance that electric arc can not fully enter the grid sheet.
With reference to Fig. 1,2,3, AC contactor bar sheet arc control device with dual striking sheet of the present invention, comprise moving contact 6, fixed contact 7 and arc-extinguish chamber 1, dispose the ferromagnetic arc extinguishing grid pieces group that is arranged in order and vertically place with the arc control device bottom surface in the arc-extinguish chamber 1, described ferromagnetic arc extinguishing grid pieces group is made up of U-shaped striking sheet 4, middle grid sheet group 3 and L shaped striking sheet 2, striking sheet 2 and 4 constitutes dual striking sheet, middle grid sheet group 3 is shorter near a sheet grating leaf length of striking sheet 2, and the top of arc-extinguish chamber 1 has venthole 5.
Ferromagnetic grid sheet group is made up of vertical part a, chamfered portion b and horizontal component c apart from moving contact 6 and fixed contact 7 L shaped striking sheet 2 farthest, vertically part a plays the effect of vertical grid sheet, chamfered portion b and horizontal component c contact direction are outstanding, allow electric arc at the motion initial stage on the one hand, the contacting ignition arc sheet plays a parallel gate sheet effect on the other hand in advance, in advance arc cutting, its existence has also strengthened arc blow-out magnetic field, has improved the arc control device internal electric field and has distributed.Vertically grid sheet group 3 is different in size, shorter from the vertical grid sheet of a slice that L shaped striking sheet 2 is nearest, is convenient to allow L shaped striking sheet 2 pilot arcs enter;
The U-shaped striking sheet 4 of the most close moving contact 6 and fixed contact 7 plays the striking sheet equally and a slice is vertically placed the grid sheet, the fore-end that helps the close moving contact of pilot arc on the one hand enters ferromagnetic grid sheet group, it also is the vertical grid sheet of a slice on the other hand, two edge lengths of U-shaped striking sheet 2 are inequality, and are shorter near a limit of moving contact 6.The ferromagnetic arc extinguishing grid pieces group of the dual striking of whole arc control device is arranged in order in moving contact 6 both sides, and it is U-shaped striking sheet 4, middle grid sheet group 3, L shaped striking sheet 2 in proper order.
During use, after moving contact 6 and fixed contact 7 disconnections, on dynamic and static contact, produce electric arc, because the dual boot of L shaped striking sheet 2 and U-shaped striking sheet, very fast electric arc introducing grid sheet group, the striking sheet of being made by ferromagnetic material has also been strengthened magnetic field in addition, is easy to electric arc is drawn in the grid sheet.Under the guiding of dual striking sheet, arc energy fully enters grid sheet group, and two striking sheets also participate in arc cutting, because of.And strengthened medium recovery strength after the arc current zero passage, improved the contactor break performance.
In order to estimate arc extinction performance of the present invention, (Fig. 4 a) contrasts, and is research object with the A.C. contactor of CJ20-63A, is under 660V, the AC-4 condition of work in rated voltage with the present invention (Fig. 4 b) and existing structure, take away outage stream and be 400A, promptly surpass 6 times of rated current.Test is power supply with the oscillation circuit, cut-offs for the simulation three-phase circuit first opens mutually, and power taking condenser charge voltage is
Umax＝660*1.5*/＝808V
Consider that the electric arc blow-out has randomness, when contact is opened, use the fuse starting the arc, compare test, the probability of restriking after the statistics arc current zero passage first time is represented (as shown in Figure 5) with histogram.To traditional structure A, the rate of restriking reaches 64%, and the rate of restriking of the present invention is lower than 10%.
In above-mentioned process of the test, take arc current zero passage moment electric Arc Motion position with the quick camera head of optical fiber, Fig. 6 is the result of two kinds of structure records, the figure orbicular spot is represented the position of multifiber in the arc control device layout, the shade of round dot represents that optical fiber accepts the electric arc light intensity, and color is deeply felt more and shown that the electric arc light intensity is strong more.The left side of figure is the voltage and current waveform of electric arc, and vertical guideline is represented moment of writing down.By the figure of record as can be seen, conventional junction composition a, arc current zero passage moment, the electric arc major part is burnt outside the grid sheet, and figure b of the present invention, electric arc all enters the grid sheet, thereby the former electric arc restrikes after zero passage, and then after the arc current zero passage, electric arc has just extinguished the utility model structure.
AC contactor bar sheet arc control device with dual striking sheet of the present invention are by the inspection center of authorized by state test proof: after the CJ20-63A A.C. contactor is used above-mentioned arc control device instead, can accomplish under 660V, AC-4 condition of work etc. that electric current cut-offs.
Claims (4)
1. AC contactor bar sheet arc control device with dual striking sheet, comprise moving contact (6), fixed contact (7) and arc-extinguish chamber (1), dispose the ferromagnetic arc extinguishing grid pieces group that is arranged in order and vertically place with the arc control device bottom surface in the arc-extinguish chamber (1), it is characterized in that, described ferromagnetic arc extinguishing grid pieces group is by U-shaped striking sheet (4), middle grid sheet group (3) and L shaped striking sheet (2) the formation grating arc-extinguishing chamber with dual striking sheet, middle grid sheet groups (3) are shorter near a sheet grating leaf length of striking sheet (2), and the top of arc-extinguish chamber (1) has venthole (5).
2. the AC contactor bar sheet arc control device with dual striking sheet as claimed in claim 1, it is characterized in that, the ferromagnetic arc extinguishing grid pieces group of described dual striking is arranged in order in bridge-type moving contact (6) both sides, and it is U-shaped striking sheet (4), middle grid sheet group (3), L shaped striking sheet (2) in proper order.
3. the AC contactor bar sheet arc control device with dual striking sheet as claimed in claim 1, it is characterized in that, described L shaped striking sheet (2) is made up of vertical component, chamfered portion and horizontal component three parts, and chamfered portion and horizontal component are outstanding to moving contact (6) direction.
4. the AC contactor bar sheet arc control device with dual striking sheet as claimed in claim 1 is characterized in that, its two length of sides of described U-shaped striking sheet (4) are short inequality, and are shorter near a limit of moving contact (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710017488 CN101055807A (en) | 2007-03-13 | 2007-03-13 | AC contactor bar arc-quenching chamber with the double arc slice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710017488 CN101055807A (en) | 2007-03-13 | 2007-03-13 | AC contactor bar arc-quenching chamber with the double arc slice |
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| Publication Number | Publication Date |
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| CN101055807A true CN101055807A (en) | 2007-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710017488 Pending CN101055807A (en) | 2007-03-13 | 2007-03-13 | AC contactor bar arc-quenching chamber with the double arc slice |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217076B (en) * | 2007-12-30 | 2011-01-19 | 人民电器集团有限公司 | AC contactor arc control device |
| CN103926542A (en) * | 2014-03-06 | 2014-07-16 | 温州大学 | Detection method for arc extinguishing efficiency of grid arc extinguish chamber and measuring device thereof |
| CN105659344A (en) * | 2014-02-27 | 2016-06-08 | 沙尔特宝有限公司 | Quenching chamber for a contactor and a contactor for quenching arcs |
| CN109473307A (en) * | 2019-01-09 | 2019-03-15 | 常熟开关制造有限公司(原常熟开关厂） | A kind of contact of breaker arc-control device and its breaker |
| CN109546541A (en) * | 2018-10-30 | 2019-03-29 | 南安市简锐工业设计有限公司 | Novel intelligent convergence control cabinet |
-
2007
- 2007-03-13 CN CN 200710017488 patent/CN101055807A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217076B (en) * | 2007-12-30 | 2011-01-19 | 人民电器集团有限公司 | AC contactor arc control device |
| CN105659344A (en) * | 2014-02-27 | 2016-06-08 | 沙尔特宝有限公司 | Quenching chamber for a contactor and a contactor for quenching arcs |
| CN105659344B (en) * | 2014-02-27 | 2018-08-17 | 沙尔特宝有限公司 | Contactor for the explosion chamber of contactor and for eliminating electric arc |
| CN103926542A (en) * | 2014-03-06 | 2014-07-16 | 温州大学 | Detection method for arc extinguishing efficiency of grid arc extinguish chamber and measuring device thereof |
| CN103926542B (en) * | 2014-03-06 | 2017-02-22 | 温州大学 | Detection method for arc extinguishing efficiency of grid arc extinguish chamber and measuring device thereof |
| CN109546541A (en) * | 2018-10-30 | 2019-03-29 | 南安市简锐工业设计有限公司 | Novel intelligent convergence control cabinet |
| CN109473307A (en) * | 2019-01-09 | 2019-03-15 | 常熟开关制造有限公司(原常熟开关厂） | A kind of contact of breaker arc-control device and its breaker |
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