CN204130487U - A kind of current limliting miniature circuit breaker - Google Patents
A kind of current limliting miniature circuit breaker Download PDFInfo
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- CN204130487U CN204130487U CN201420657104.5U CN201420657104U CN204130487U CN 204130487 U CN204130487 U CN 204130487U CN 201420657104 U CN201420657104 U CN 201420657104U CN 204130487 U CN204130487 U CN 204130487U
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- current
- arc
- circuit breaker
- insulating part
- limiting inductor
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A kind of current limliting miniature circuit breaker.Solve the breaking capacity of existing miniature circuit breaker and the problem of current limiting performance difference.It comprises housing, contact system, bimetal leaf, arc ignition system and arc quenching system is provided with in described housing, described arc quenching system comprises arc control device, described contact system comprises moving contact and fixed contact, described arc ignition system comprises arc striking piece and insulating part, described insulating part is provided with containing cavity, described moving contact and fixed contact are located in containing cavity, the outer surface of described insulating part is at least provided with an annular current-limiting inductor, the two ends of described current-limiting inductor are connected with bimetal leaf with arc striking piece respectively, and arc striking piece and current-limiting inductor are separated by insulating part.Under the utility model is provided in the prerequisite not changing housing size, its interrupting performance and slider material have nothing to do, and can obtain rapidly high arc voltage, improve circuit breaker impedance, make it electric arc extinguish fast, thus make circuit breaker obtain high breaking capacity and current limiting performance.
Description
Technical field
The present invention relates to a kind of circuit breaker, be specifically related to a kind of current limliting miniature circuit breaker.
Background technology
Miniature circuit breaker avoids by transship or short circuit causes the protective device of damage for the protection of circuit and electric equipment.Current miniature circuit breaker not only has the effect of protective circuit wire and electric device, and has the critical function of limiting short-circuit current in short-circuit process.Performance mainly breaking capacity and the current limiting capacity of miniature circuit breaker, in order to improve breaking capacity and the current limiting capacity of miniature circuit breaker, the electric arc produced in breaking course should be made to extinguish rapidly, adopt following method at present: 1 moving contact and fixed contact quick separating, elongating arc; 2 electric arcs under the guiding of arc striking component, enter arc control device; 3 arc extinguishing grid pieces subdividing the arcs, formation series connection short arc; 4 arc extinguishing grid pieces make electric arc cool blow-out etc.Not changing dynamic and static contact separating distance, namely utilize the outline of identical miniature circuit breaker, when being cut off by the larger short circuit current increased with power supply capacity, if only utilize above-mentioned electric arc to extend and cooling, also there is the limit in self.And existing employing special material manufactures moving contact and fixed contact, make dynamic/static contact produce electrodynamic repulsion force can separate fast, but this mode production cost is higher, also has part small-sized DC circuit breaker, strengthen magnetic blow-out by increase permanent magnet to make electric arc quickly through arc striking component, enter arc control device thus extinguish fast electric arc, but there is polarity, can only be used for DC circuit in this mode because of permanent magnet, and can not be used for alternating current circuit.
Summary of the invention
For solving the breaking capacity of existing miniature circuit breaker and the problem of current limiting performance difference in background technology, the invention provides a kind of current limliting miniature circuit breaker.
Technical scheme of the present invention is: a kind of current limliting miniature circuit breaker, comprise housing, binding post is provided with in described housing, contact system, tripping system, bimetal leaf, arc ignition system and arc quenching system, described arc quenching system comprises arc control device, described contact system comprises moving contact and fixed contact, described arc ignition system comprises arc striking piece and insulating part, described insulating part is provided with containing cavity, described moving contact and fixed contact are located in containing cavity, the outer surface of described insulating part is at least provided with an annular current-limiting inductor, the two ends of described current-limiting inductor are connected with bimetal leaf with arc striking piece respectively, arc striking piece and current-limiting inductor are separated by described insulating part.
As a modification of the present invention, described current-limiting inductor is connected with bimetal leaf by connector, and described connector and bimetal leaf form annular chamber.
As a further improvement on the present invention, described insulating part comprises the first insulation board and the second insulation board, and the first described insulation board is connected by the 3rd insulation board with the second insulation board.
As a further improvement on the present invention, described annular current-limiting inductor has two, and two current-limiting inductors are located on the first insulation board and the second insulation board respectively.
As a further improvement on the present invention, described arc striking piece is provided with lug, and described lug stretches out outside insulating part and current-limiting inductor Joint.
As a further improvement on the present invention, described insulating part is provided with the shoulder block placing lug.
As a further improvement on the present invention, described insulating part outwards folds edge, and described edge is located between current-limiting inductor and arc control device.
As a further improvement on the present invention, described insulating part is provided with the mounting blocks for settling current-limiting inductor.
As a further improvement on the present invention, described current-limiting inductor adopts resistance material to make.
As a further improvement on the present invention, described current-limiting inductor is by welding, riveting or be threaded and arc striking piece Joint.
The invention has the beneficial effects as follows, when short circuit current appears in load-side, miniature circuit breaker action, moving contact is separated with fixed contact and produces electric arc.Now electric current enters annular current-limiting inductor through electric arc, current-limiting inductor increases line impedance on the one hand and plays metering function, the magnetic field that current-limiting inductor produces on the other hand makes electric arc enter arc control device fast, electric arc is split rapidly, cools and extinguish, thus reach the object improving miniature circuit breaker breaking capacity.The invention provides new current limliting breaking technology, under the prerequisite not changing housing size, its interrupting performance and slider material have nothing to do, high arc voltage can be obtained rapidly, improve circuit breaker impedance, make it electric arc extinguish fast, thus make circuit breaker obtain high breaking capacity and current limiting performance.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the embodiment of the present invention one.
Accompanying drawing 2 is the structural representation after accompanying drawing 1 removes insulating part 62 and current-limiting inductor 8.
Accompanying drawing 3 is the structural representation of arc ignition system 6 in accompanying drawing 1.
Accompanying drawing 4 is the structural representation after accompanying drawing 3 removal insulating part 62.
Accompanying drawing 5 is the structural representation of insulating part 62 in accompanying drawing 3.
Accompanying drawing 6 is the structural representation of another structure in accompanying drawing 3.
Accompanying drawing 7 is the structural representation of the embodiment of the present invention two.
Accompanying drawing 8 for accompanying drawing 7 remove after insulating part 62 and current-limiting inductor 8 structural representation.
Accompanying drawing 9 is the structural representation of the embodiment of the present invention three.
Accompanying drawing 10 for accompanying drawing 9 remove after insulating part 62 and current-limiting inductor 8 structural representation.
Accompanying drawing 11 is the structural representation of arc ignition system 6 in accompanying drawing 9.
Accompanying drawing 12 is the structural representation removing insulating part 62 in accompanying drawing 11.
Accompanying drawing 13 is the structural representation of insulating part 62 in accompanying drawing 11.
In figure, 1, housing; 2, binding post; 21, input terminal; 22, outlet terminal; 3, contact system; 31, moving contact; 32, fixed contact; 4, tripping system; 5, bimetal leaf; 6, arc ignition system; 61, arc striking piece; 611, lug; 62, insulating part; 621, containing cavity; 622, the first insulation board; 623, the second insulation board; 624, the 3rd insulation board; 625, shoulder block; 626, edge; 627, mounting blocks; 7, arc quenching system; 71, arc control device; 8, current-limiting inductor; 81, connector; 811, annular chamber; 9 (9 ', 9 "), electric arc.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated:
Shown in Fig. 1 composition graphs 2-13, a kind of current limliting miniature circuit breaker, comprise housing 1, be provided with binding post 2, contact system 3, tripping system 4, bimetal leaf 5, arc ignition system 6 and arc quenching system 7 in described housing 1, described binding post 2 comprises input terminal 21 and outlet terminal 22.Specifically, embodiment one is different from the position being distinguished as power inleting terminal of embodiment two.Described arc quenching system 7 comprises arc control device 71, described contact system 3 comprises moving contact 31 and fixed contact 32, described arc ignition system 6 comprises arc striking piece 61 and insulating part 62, described insulating part 62 is provided with containing cavity 621, described moving contact 31 and fixed contact 32 are located in containing cavity 621, the outer surface of described insulating part 62 is at least provided with an annular current-limiting inductor 8, specifically, described annular current-limiting inductor 8 should arrange large area as far as possible and be arranged on insulating part.So not only can increase magnetic field force, increase the magnetic blow-out effect in circuit breaker breaking course, add the resistance of current-limiting inductor simultaneously, increase the metering function of product.The two ends of described current-limiting inductor 8 are connected with bimetal leaf 5 with arc striking piece 61 respectively, and arc striking piece 61 and current-limiting inductor 8 are separated by described insulating part 62.The invention has the beneficial effects as follows, when short circuit current appears in load-side, miniature circuit breaker action, moving contact is separated with fixed contact and produces electric arc.Now electric current enters annular current-limiting inductor through electric arc, current-limiting inductor increases line impedance on the one hand and plays metering function, the magnetic field that current-limiting inductor produces on the other hand makes electric arc enter arc control device fast, electric arc is split rapidly, cools and extinguish, thus reach the object improving miniature circuit breaker breaking capacity.The invention provides new current limliting breaking technology, under the prerequisite not changing housing size, its interrupting performance and slider material have nothing to do, high arc voltage can be obtained rapidly, improve circuit breaker impedance, make it electric arc extinguish fast, thus make circuit breaker obtain high breaking capacity and current limiting performance.In normal operation of circuit breaker process, input terminal is connected by contact system with outlet terminal, and now no current circulation in current-limiting inductor, product does not produce additional energy consumption.
Described current-limiting inductor 8 is connected with bimetal leaf 5 by connector 81, and described connector 81 forms annular chamber 811 with bimetal leaf 5.The design of connector not only increases the resistance of product, and the annular chamber simultaneously formed can increase product magnetic field force further, makes the magnetic blow-out better effects if of product, and striking, blow-out are faster.
Described insulating part 62 comprises the first insulation board 622 and the second insulation board 623, and the first described insulation board 622 is connected by the 3rd insulation board 624 with the second insulation board 623.The setting of insulating part avoids each parts in housing by electric arc short circuit, to affect properties of product.Specifically, the first described insulation board 622, second insulation board 623 and the 3rd insulation board 624 are integral type structure.In particular, insulating part adopts insulation gas exhausted material to make.Pressure reduction and the striking faster of magnetic blow-out effect of gas can be produced like this by insulating part, improve the breaking capacity of product.Specifically, described annular current-limiting inductor 8 has two, and two current-limiting inductors 8 are located on the first insulation board 622 and the second insulation board 623 respectively.Certainly, in real process, current-limiting inductor 8 can be one, three, four or more, the first insulation board also can be wound around multi-turn current-limiting inductor, the impedance of product is increased, the current limitation effect of raising product.
Described arc striking piece 61 is provided with lug 611, and described lug 611 stretches out outside insulating part 62 and current-limiting inductor 8 Joint.Such structure is convenient to the connection of current-limiting inductor, can avoid the current-limiting inductor outside electric arc influence insulating part simultaneously.Specifically, described insulating part 62 is provided with the shoulder block 625 placing lug 611.Such structure is convenient to the fixing of lug.
Described insulating part 62 outwards folds edge 626, and described edge 626 is located between current-limiting inductor 8 and arc control device 71.Specifically, described insulating part 62 is provided with the mounting blocks 627 for settling current-limiting inductor 8.Edge be arranged so that current-limiting inductor 8 and arc control device 71 separate, avoid current-limiting inductor and arc control device by electric arc short circuit.
Described current-limiting inductor 8 adopts resistance material to make.Specifically, described resistance material adopts the material such as Copper and its alloy, manganin, constantan (copper-manganese aluminium) alloy, nichrome, Aludirome, platinum base alloy, palladium-base alloy, gold-base alloy, silver-base alloy, steel and various steel alloys to make.Adopt to there is electric conducting material and there is certain resistance and make current-limiting inductor.While making current-limiting inductor to produce larger magnetic field like this, also can consume the electric current flowing through current-limiting inductor due to larger resistance, ensure breaking capacity and the current limiting performance of product.
Described current-limiting inductor 8 is by welding, riveting or be threaded and arc striking piece 61 Joint.Such structure is convenient to the fixing of current-limiting inductor.
Embodiment one: with reference to accompanying drawing 1-6, when short circuit current appears in load-side, miniature circuit breaker action, moving contact and fixed contact separate and produce electric arc 9; At this moment circuital current comprises excitation release by input terminal 21 through the tripping system of this miniature circuit breaker of tripping system 4(), fixed contact 32, refer to through electric arc 9, moving contact 31, circuit breaker internal conductor, bimetal leaf 5(the dropout part that two kinds of different metalworks are formed again), wire, outlet terminal 22 flow to load; Electric arc 9 magnetic blow-out effect and electric arc 9 to contact with insulating part 62 produce steam before and after electric arc 9 mineralization pressure official post electric arc 9 to arc striking piece 61 fast moving, when electric arc one end arc root moves to arc striking piece 61 place, circuital current by input terminal 21 through sequence magnetic release, fixed contact, then flow to arc striking piece 61 through electric arc 9 ', current-limiting inductor 8, bimetal leaf 5, wire, outlet terminal 22 flow to load.Now increase line impedance in current-limiting inductor 8 one aspect plays metering function, another aspect current-limiting inductor produces magnetic field makes electric arc move to arc control device direction fast.When electric arc 9 " enter in arc control device, electric arc is split by grid and cooling makes arc voltage rise fast, arc control device produce steam and grid and electric arc are fully cooled cause extinguishing, namely complete short circuit and disconnect under high arc temperature effect.
Embodiment two: with reference to accompanying drawing 7 and 8, embodiment two is contrary with embodiment one sense of current.
Embodiment three: with reference to accompanying drawing 9-13, embodiment three is identical with embodiment one sense of current, just the shape of current-limiting inductor and arc striking component is different.
Specifically, the current-limiting inductor in the example of all execution modes, arc striking piece can be arbitrary shape, and material can be any electric conducting material, and described current-limiting inductor preferably arranges certain resistance, can play better metering function.Bimetal leaf is connected by wire with binding post, and this wire can be arbitrary shape, and material can be any electric conducting material, can be sheet material, band, section bar, can be hard material, soft material.
Every technical staff's notice: although the present invention describes according to above-mentioned embodiment, invention thought of the present invention is not limited in this invention, and the repacking of any utilization inventive concept, all will include in this patent scope of patent protection.
Claims (10)
1. a current limliting miniature circuit breaker, comprise housing (1), binding post (2) is provided with in described housing (1), contact system (3), tripping system (4), bimetal leaf (5), arc ignition system (6) and arc quenching system (7), described arc quenching system (7) comprises arc control device (71), described contact system (3) comprises moving contact (31) and fixed contact (32), it is characterized in that: described arc ignition system (6) comprises arc striking piece (61) and insulating part (62), described insulating part (62) is provided with containing cavity (621), described moving contact (31) and fixed contact (32) are located in containing cavity (621), the outer surface of described insulating part (62) is at least provided with an annular current-limiting inductor (8), the two ends of described current-limiting inductor (8) are connected with bimetal leaf (5) with arc striking piece (61) respectively, arc striking piece (61) and current-limiting inductor (8) are separated by described insulating part (62).
2. a kind of current limliting miniature circuit breaker according to claim 1, is characterized in that described current-limiting inductor (8) is connected with bimetal leaf (5) by connector (81), and described connector (81) and bimetal leaf (5) form annular chamber (811).
3. a kind of current limliting miniature circuit breaker according to claim 1, it is characterized in that described insulating part (62) comprises the first insulation board (622) and the second insulation board (623), described the first insulation board (622) is connected by the 3rd insulation board (624) with the second insulation board (623).
4. a kind of current limliting miniature circuit breaker according to claim 3, is characterized in that described annular current-limiting inductor (8) has two, and two current-limiting inductors (8) are located on the first insulation board (622) and the second insulation board (623) respectively.
5. a kind of current limliting miniature circuit breaker according to claim 1, is characterized in that described arc striking piece (61) is provided with lug (611), described lug (611) stretch out insulating part (62) outward with current-limiting inductor (8) Joint.
6. a kind of current limliting miniature circuit breaker according to claim 5, is characterized in that described insulating part (62) is provided with the shoulder block (625) placing lug (611).
7. a kind of current limliting miniature circuit breaker according to claim 1, it is characterized in that described insulating part (62) outwards folds edge (626), described edge (626) is located between current-limiting inductor (8) and arc control device (71).
8. a kind of current limliting miniature circuit breaker according to claim 1, is characterized in that described insulating part (62) is provided with the mounting blocks (627) for settling current-limiting inductor (8).
9. a kind of current limliting miniature circuit breaker according to claim 1, is characterized in that described current-limiting inductor (8) adopts resistance material to make.
10. a kind of current limliting miniature circuit breaker according to claim 1, is characterized in that described current-limiting inductor (8) is by welding, riveting or be threaded and arc striking piece (61) Joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420657104.5U CN204130487U (en) | 2014-11-06 | 2014-11-06 | A kind of current limliting miniature circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420657104.5U CN204130487U (en) | 2014-11-06 | 2014-11-06 | A kind of current limliting miniature circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN204130487U true CN204130487U (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420657104.5U Expired - Fee Related CN204130487U (en) | 2014-11-06 | 2014-11-06 | A kind of current limliting miniature circuit breaker |
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| CN (1) | CN204130487U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332368A (en) * | 2014-11-06 | 2015-02-04 | 徐浩清 | Current-limiting small-sized breaker |
-
2014
- 2014-11-06 CN CN201420657104.5U patent/CN204130487U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332368A (en) * | 2014-11-06 | 2015-02-04 | 徐浩清 | Current-limiting small-sized breaker |
| CN104332368B (en) * | 2014-11-06 | 2017-01-11 | 徐浩清 | Current-limiting small-sized breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20161106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |