CN2676394Y - A grating sheet arc-suppression chamber with gas-generating insulating material interlayer - Google Patents
A grating sheet arc-suppression chamber with gas-generating insulating material interlayer Download PDFInfo
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- CN2676394Y CN2676394Y CN 200420041499 CN200420041499U CN2676394Y CN 2676394 Y CN2676394 Y CN 2676394Y CN 200420041499 CN200420041499 CN 200420041499 CN 200420041499 U CN200420041499 U CN 200420041499U CN 2676394 Y CN2676394 Y CN 2676394Y
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- arc
- grating
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- gas
- intermediate plate
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Abstract
The utility model discloses a grating sheet arc-suppression chamber with a gas-generating insulating material interlayer, which is applied to various low-voltage circuit breakers. The grating sheet arc-suppression chamber comprises a grating sheet arc-suppression chamber of a traditional circuit breaker. The utility model is characterized in that a gas-generating insulating clamping sheet is inserted between two adjacent iron magnetic grating sheets; the gas-generating insulating clamping sheets are respectively arranged at both sides of every layer of iron magnetic grating sheet; a gap is formed in the middle; movable contacts are positioned among the gaps. For a plastic casing circuit breaker, the movable contacts can move in the middle. When the circuit breaker is broken, an electric arc contacts an insulating material sheet to make the insulating material sheet gasified for generating a gas containing the hydrogen gas component; on one hand, the electric arc is cooled; on the other hand, the pressure of the arc-suppression chamber is increased to generate gas driving force for prompting the electric arc to successfully enter the grating sheet to suppress arc. A model arc-suppression chamber is used for carrying out a contrast test of the grating sheet arc-suppression chamber with or without an insulating sheet in a lab; when 2kA current is broken, the former can make the peak value of the electric arc current reduced by 15.3% and the arcing time decreased by 40%, and consequently the breaking performance is enhanced in large amplitude.
Description
Technical field
The utility model belongs to the low-voltage electrical apparatus field, relates to the arc control device of low-voltage circuit breaker, particularly a kind of grating arc-extinguishing chamber that can be widely used in the band gas producing lamination of insulation material of low-voltage circuit breaker.
Background technology
China's low-voltage circuit breaker annual value of production surpasses 10,000,000,000 yuan, and along with the increase of low voltage electric network capacity, demand rapidly increases, it is little particularly to need to develop volume, the low-voltage circuit breaker that break performance is high concerning miniature circuit breaker and breaker of plastic casing, more needs to improve its current limiting characteristic.Traditional grating arc-extinguishing chamber can not satisfy the requirement of break performance.
The structure of low-voltage circuit breaker is shown in Fig. 1 a and Fig. 1 b, its structure comprises, the arc control device of forming by multi-disc iron railings sheet 21, moving contact 5 and fixed contact 6, mechanism 8, release 9, handle 10, plastic casing 11 reaches goes up leading-out terminal 12 and lower wire end 13 compositions (referring to accompanying drawing 1), and the characteristic of cut-offfing of circuit breaker is mainly determined by contact and arc quenching system.
Traditional grating arc-extinguishing chamber enters grid sheet moment when electric arc, because increasing suddenly and its rear area of arc voltage, the temperature of promptly running arc road and contact regions is very high, so the thermal breakdown of rear area can take place, and electric arc is run out from the grid sheet, and this phenomenon is called electric arc and punctures behind, and this phenomenon occurs repeatedly, make arc voltage occur repeatedly falling, thereby prolonged the arcing time of current-limiting type circuit breaker.Along with the increase of low voltage electric network capacity, need the exploitation volume little, the low-voltage circuit breaker that break performance is high concerning miniature circuit breaker and breaker of plastic casing, more needs to improve its current limiting characteristic especially.
Summary of the invention
At defective or deficiency that above-mentioned prior art exists, the purpose of this utility model is, a kind of novel grating arc-extinguishing chamber with gas producing lamination of insulation material is provided.
The technical scheme that realizes above-mentioned purpose is, the grating arc-extinguishing chamber of this band gas producing lamination of insulation material comprises the grating arc-extinguishing chamber of conventional circuit breaker; Be characterized in that be inserted with aerogenesis insulation intermediate plate between adjacent two ferromagnetic grid sheets of grating arc-extinguishing chamber, aerogenesis insulation intermediate plate is put in the both sides of the ferromagnetic grid sheet of each layer respectively.
Some other characteristics of the present utility model are, described ferromagnetic grid sheet is the U type, and the aerogenesis insulation intermediate plate that is placed on the both sides of ferromagnetic grid sheet forms a slit in the centre; Moving contact is moved between the slit.When described moving contact was lighted electric arc leaving fixed contact, moving contact moved in the slit, and the electric arc of generation contact aerogenesis insulation intermediate plate makes it to gasify and produces the gas stream of hydrogen composition.
The material of aerogenesis insulation intermediate plate is polyformaldehyde or nylon.
The grating arc-extinguishing chamber of band gas producing lamination of insulation material of the present utility model, owing to be provided with aerogenesis insulation intermediate plate, this aerogenesis insulation intermediate plate produces the gas stream of hydrogen composition, has cooled off race arc road and contact regions, thereby can suppress electric arc punch-through behind.
Description of drawings
Fig. 1 is the structure chart of low-voltage circuit breaker; Wherein Fig. 1 a is a cutaway view, and Fig. 1 b is a stereogram;
Fig. 2 is a structure principle chart of the present utility model; Wherein (a) is that ferromagnetic grid sheet and aerogenesis insulation intermediate plate stacks figure, (b) is that moving contact produces the arcing state diagram when leaving the fixed contact motion, (c) is ferromagnetic grid plate shape figure, (d) is the schematic diagram that aerogenesis insulation intermediate plate overlays ferromagnetic grid sheet.
Fig. 3 is not for the arc voltage waveform figure of aerogenesis intermediate plate;
Fig. 4 is the arc voltage waveform figure of band aerogenesis intermediate plate;
Fig. 5, Fig. 6 are two kinds of structural representations of insulation intermediate plate.
Embodiment
The embodiment that provides below in conjunction with accompanying drawing and utility model people is described in further detail the utility model.
Referring to Fig. 1, according to technique scheme, the grating arc-extinguishing chamber of band gas producing lamination of insulation material comprises the ferromagnetic grating arc-extinguishing chamber 1 of conventional circuit breaker; Be inserted with aerogenesis insulation intermediate plate 3 between adjacent two ferromagnetic grid sheets 2 in ferromagnetic grating arc-extinguishing chamber 1, aerogenesis insulation intermediate plate 3 is put in the both sides of the ferromagnetic grid sheet 2 of each layer respectively.Described ferromagnetic grid sheet 2 is the U type, and the aerogenesis insulation intermediate plate 3 that is placed on the both sides of ferromagnetic grid sheet 2 forms a slit 4 in the centre; Moving contact 5 is moved between slit 4.Concerning breaker of plastic casing, when moving contact 5 leaves fixed contact 6, and when lighting electric arc 7, moving contact 5 moves in gap 4, the electric arc 7 contact aerogenesis insulation intermediate plates 3 that produce make it gasification, and produce the gas of hydrogen composition, this air-flow can cool off electric arc, can produce the actuating force (see figure 2) that drives electric arc again.
This by one deck aerogenesis heat insulating lamella 3, the grating arc-extinguishing chamber 1 that the ferromagnetic grid sheet 2 of one deck is formed, be a kind of " sandwich " formula structure, it combines insulator wall aerogenesis cooling electric arc and two kinds of arc extinguishing measures of grid sheet arc extinguishing, and the effect of aerogenesis insulating interlayer shows following several aspect:
Open when contact and to light electric arc, electric arc need be stagnated a period of time and just can move on contact, is called electric arc dead time during this period of time.Reduce electric arc and not only help reducing the scaling loss of electric arc to contact dead time, and allow electric arc enter arc control device as early as possible, help improving break performance, former study points out, the wall aerogenesis can reduce electric arc dead time.
The narrow slit that the aerogenesis heat insulating lamella forms, electric arc closely is in contact with it, and thin slice gasifies and aerogenesis under the high arc temperature effect, with composition as the gas containing hydrogen gas of the material production of polyformaldehyde (POM) or nylon (Nylon) and so on, can play good cooling effect to electric arc, thereby improved arc voltage and current limiting performance, and when the electric arc zero passage, improved medium recovery strength.
Because aerogenesis insulating material 3 aerogenesis increase interrupting process arc control device pressure, form air-flow and air-blowing power that one drives electric arc from gas outlet, arc control device road, promotion electric arc enters grating arc-extinguishing chamber and extinguishes fast.
Ferromagnetic grid sheet is made up of body and two legs, shank mainly works to strengthen magnetic field, but when electric arc is in contact with it, can produce metallic vapour and influence arc extinguishing, the grid chip architecture that the application proposed, the shank inboard of ferromagnetic grid sheet utilizes aerogenesis heat insulating lamella and electric arc to isolate, thereby has removed this defective.
Traditional grating arc-extinguishing chamber enters grid sheet moment when electric arc, since arc voltage increase its rear area suddenly, the temperature of promptly running arc road and contact regions is very high, so the thermal breakdown of rear area can take place, and electric arc is run out from the grid sheet, and this phenomenon is called electric arc and punctures behind, and this phenomenon occurs repeatedly, make arc voltage occur repeatedly falling, thereby prolonged the arcing time of current-limiting type circuit breaker.The grating arc-extinguishing chamber that the utility model proposes because aerogenesis insulating interlayer aerogenesis has cooled off race arc road and contact regions, thereby can suppress electric arc punch-through behind.
In order to confirm the effect of novel grating arc-extinguishing chamber, the applicant has made model arc control device, with oscillation circuit for cut-offfing experiment power supply, when arc control device with the band be not with under the aerogenesis insulating material intermediate plate condition, power taking condenser charge voltage is 200V, when prospective short circuit current is 2011A, cut-off test, result of the test sees Table 1.
Table 1 band does not cut-off the test contrast with not being with the gas exhausted material intermediate plate
| Arc control device | Current limliting peak value (A) | Arcing time (ms) | The fair logical energy (A of heat 2S) | Arc energy (J) | The obvious drop number of arc voltage |
| Be not with the aerogenesis intermediate plate | 1380.98 | 2.584 | 2547.3 | 452.6 | 1 |
| Band aerogenesis intermediate plate | 1169.56 | 1.527 | 1971.6 | 376.7 | 6 |
Found out that by table one data adopted the grating arc-extinguishing chamber of strap clamp layer thick, the current limliting peak value has reduced by 15.3%, the arcing time has reduced 40%.
Fig. 3 and Fig. 4 are respectively two kinds of arc control device and cut-off the oscillogram of test, and the phenomenon of falling of tangible repeated multiple times is not arranged with the arc voltage waveform (referring to Fig. 3) of aerogenesis intermediate plate, and the arc voltage waveform (referring to Fig. 4) of band aerogenesis intermediate plate is the waveform smoother then.
Fig. 5 and Fig. 6 are respectively two kinds of derivative strucures of aerogenesis insulation intermediate plate, and the aerogenesis insulation intermediate plate of accompanying drawing 5 is shorter, help stoping thermal current to arrive grid sheet top and reflection take place and enter interstitial area, cause regional thermal breakdown behind.The structure of accompanying drawing 6 is that the gap that aerogenesis insulation intermediate plate forms is progressively widened on top, helps making full use of the dissection of grid sheet upper end to electric arc.
Claims (4)
1. the grating arc-extinguishing chamber of the band gas producing lamination of insulation material of a low-voltage circuit breaker comprises the ferromagnetic grating arc-extinguishing chamber [1] of conventional circuit breaker; It is characterized in that be inserted with aerogenesis insulation intermediate plate [3] between adjacent two ferromagnetic grid sheets [2] of ferromagnetic grating arc-extinguishing chamber [1], aerogenesis insulation intermediate plate [3] is put in the both sides of the ferromagnetic grid sheet of each layer [2] respectively.
2. the grating arc-extinguishing chamber of band gas producing lamination of insulation material as claimed in claim 1 is characterized in that, described ferromagnetic grid sheet [2] is the U type, and the aerogenesis insulation intermediate plate [3] that is placed on the both sides of ferromagnetic grid sheet [2] forms a slit [4] in the centre; Moving contact [5] is between slit [4].
3. the grating arc-extinguishing chamber of band gas producing lamination of insulation material as claimed in claim 2, it is characterized in that, when described moving contact [5] is lighted electric arc leaving fixed contact [6], moving contact [5] moves in slit [4], electric arc [7] the contact aerogenesis insulation intermediate plate [3] that produces makes edge intermediate plate [3] gasification of drawing last breath produce the gas stream of hydrogen composition.
4. the grating arc-extinguishing chamber of band gas producing lamination of insulation material as claimed in claim 1 or 2 is characterized in that, the material of described aerogenesis insulation intermediate plate [3] is polyformaldehyde or nylon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420041499 CN2676394Y (en) | 2004-02-06 | 2004-02-06 | A grating sheet arc-suppression chamber with gas-generating insulating material interlayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420041499 CN2676394Y (en) | 2004-02-06 | 2004-02-06 | A grating sheet arc-suppression chamber with gas-generating insulating material interlayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2676394Y true CN2676394Y (en) | 2005-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420041499 Expired - Lifetime CN2676394Y (en) | 2004-02-06 | 2004-02-06 | A grating sheet arc-suppression chamber with gas-generating insulating material interlayer |
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| Country | Link |
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| CN (1) | CN2676394Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298002C (en) * | 2004-02-06 | 2007-01-31 | 西安交通大学 | Grating arc-extinguishing chamber with gas producing lamination of insulation material |
| CN101556871A (en) * | 2008-04-09 | 2009-10-14 | Abb股份有限公司 | Arc splitter arrangement for an electrical switch |
| CN104969320A (en) * | 2012-12-04 | 2015-10-07 | 印度拿丁集团公司 | Arc chute arrangement for arc quenching in electrical switching device |
| CN110739175A (en) * | 2019-09-30 | 2020-01-31 | 广州供电局有限公司 | Device for improving small current breaking capacity of direct-acting high-voltage switch |
-
2004
- 2004-02-06 CN CN 200420041499 patent/CN2676394Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298002C (en) * | 2004-02-06 | 2007-01-31 | 西安交通大学 | Grating arc-extinguishing chamber with gas producing lamination of insulation material |
| CN101556871A (en) * | 2008-04-09 | 2009-10-14 | Abb股份有限公司 | Arc splitter arrangement for an electrical switch |
| CN104969320A (en) * | 2012-12-04 | 2015-10-07 | 印度拿丁集团公司 | Arc chute arrangement for arc quenching in electrical switching device |
| CN104969320B (en) * | 2012-12-04 | 2018-04-03 | 印度拿丁集团公司 | Arc-chutes in electrical switchgear for arc extinguishing configure |
| CN110739175A (en) * | 2019-09-30 | 2020-01-31 | 广州供电局有限公司 | Device for improving small current breaking capacity of direct-acting high-voltage switch |
| CN110739175B (en) * | 2019-09-30 | 2022-08-02 | 广东电网有限责任公司广州供电局 | Device for improving small current breaking capacity of direct-acting high-voltage switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20040206 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |