CN103871796A - Magnetism enhancement and arc guide device of miniature circuit breaker and miniature circuit breaker provided with magnetism enhancement and arc guide device - Google Patents
Magnetism enhancement and arc guide device of miniature circuit breaker and miniature circuit breaker provided with magnetism enhancement and arc guide device Download PDFInfo
- Publication number
- CN103871796A CN103871796A CN201410101368.7A CN201410101368A CN103871796A CN 103871796 A CN103871796 A CN 103871796A CN 201410101368 A CN201410101368 A CN 201410101368A CN 103871796 A CN103871796 A CN 103871796A
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- arc
- circuit breaker
- miniature circuit
- fixed contact
- arc guide
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Abstract
The invention discloses a magnetism enhancement and arc guide device of a miniature circuit breaker and the miniature circuit breaker provided with the magnetism enhancement and arc guide device. The magnetism enhancement and arc guide device comprises an overcurrent tripping system, a magnetism enhancement and arc guide piece and a static contact. One end of the magnetism enhancement and arc guide piece is electrically connected with a magnet yoke of the overcurrent tripping system of the miniature circuit breaker, the other end of the magnetism enhancement and arc guide piece extends into an arc strike angle of the static contact, and the distance between the other end of the magnetism enhancement and arc guide piece and the static contact of the miniature circuit breaker is larger than zero and smaller than or equal to one millimeter; the magnetism enhancement and arc guide piece is made of magnetic permeable materials. The magnetism enhancement and arc guide piece is additionally arranged in the miniature circuit breaker; when an electric arc moves to the tail of the static contact, the arc root of the electric arc can be transferred to the magnetism enhancement and arc guide piece easily because the magnetism enhancement and arc guide piece is close to the static contact, the gap between the magnetism enhancement and arc guide piece and the static contact is small and the magnetism enhancement and arc guide piece is made of the magnetic permeable materials. At this time, the magnetism enhancement and arc guide piece can play a role of arc guide, then, the electric arc is sucked into an arc extinguish chamber under the effect of the arc extinguish chamber, and therefore the electric arc can be quickly extinguished.
Description
Technical field
The present invention relates to a kind of increasing magnetic conductance arc device of miniature circuit breaker and there is the miniature circuit breaker of this device, belong to electric switch technical field.
Background technology
Miniature circuit breaker (Miniature Circuit Breaker) claims again miniature circuit breaker (Micro Circuit Breaker); mainly, as the overload of illumination, distribution line and equipment and the use of short-circuit protection of office building, house and similar building, also can be used as the use of the frequent make-break operation of circuit and conversion.
Existing miniature circuit breaker comprises contact system, arc control device, operating mechanism, free tripping mechanism, over-current protection system and short circuit protection system, make operating mechanism drive the moving contact motion in contact system by operating grip, make the disjunction of miniature circuit breaker connected sum, realize the control to electric wiring; By to heating effect of current and magnetic effect sensing, electric wiring is transshipped, implements when the fault such as short circuit protection.
In the time that dynamic/static contact contacts and have enough contacts, miniature circuit breaker is connected electric loop, changes by the local temperature of bimetallic element sensing miniature circuit breaker, judges the size of current of circuit system, realizes excess current protective function.When loop current remains on load current value that miniature circuit breaker sets and when following, the distortion that the thermal effect that this electric current produces produces hardware is very little, can not make tripper trip; In the time that loop current exceedes the rated current of setting, the hardware temperature of miniature circuit breaker raises, and can produce enough thermal deformations; promotion free tripping mechanism is triped, and now, the dynamic/static contact in contact system separately; cut off current circuit, realize current protecting function.
Short circuit protection system is by the variation of solenoid electromagnet sensing loop electric current, when loop current in normal value or set short-circuit protection value below time, the electromagnetic attraction that solenoid electromagnet produces can not overcome the active force of reaction spring, and moving iron core remains on initial position; In the time that current circuit is short-circuited fault; electric current sharply increases; the electromagnetic force that solenoid electromagnet produces overcomes the active force of reaction spring; moving iron core promotes push rod; and act on free tripping mechanism, and free tripping mechanism is triped, moving contact is opened fast under the effect of spring; cut off current circuit, realize short-circuit protection function.
The effect of operating mechanism is the active force by handle, drives the moving contact motion in contact system, realizes and connecting and disjunction; In dynamic/static contact disconnection process, in order to realize metering function, require moving contact will have enough opening speeds; There are enough dielectric strengths when making miniature circuit breaker off-state, must make between dynamic/static contact, to there is enough electric clearances.
The effect of arc control device is when miniature circuit breaker is in the time disconnecting excessive short circuit current, by the effect to electric arc, realizes Limited Current and continues the trend increasing, i.e. and metering function, and electric arc is eliminated the most at last.In the time that electric arc is introduced arc control device, be separated into many sections by the metal gate sheet in arc control device, every section of electric arc all produces a proximal pole voltage near metal gate sheet, and the pressure drop of whole electric arc is improved rapidly, makes arc extinction.
The miniature circuit breaker of selling is in the market due to the reason of volume and structure, moving contact and fixed contact have (unlike moving contact of plastic-shell circuit breaker and fixed contact in arc control device) comparatively speaking with a certain distance between arc control device, how electric arc seems particularly important from entering fast arc control device between moving contact and fixed contact, the entering fast arc control device and can reduce the scaling loss of contact system of electric arc, and can improve the breaking capacity of miniature circuit breaker.
Miniature circuit breaker in the market is generally shaped to arc as arc leading angle using fixed contact, in the time that electric arc is gone to the afterbody of arc leading angle, because the same yoke of arc leading angle (electrode of electric arc when yoke finally enters arc control device as electric arc) has a distance.The arc root of electric arc can't move in yoke from arc leading angle fast, has certain stagnation behavior.
Summary of the invention
The object of the invention is to provide a kind of increasing magnetic conductance arc device of miniature circuit breaker and has the miniature circuit breaker of this device.
For achieving the above object, the first technical scheme that the present invention adopts is: the increasing magnetic conductance arc device of miniature circuit breaker, described miniature circuit breaker comprises fixed contact and overcurrent tripping system, and described fixed contact has the arc leading angle that bends to arc, and described overcurrent tripping system comprises a yoke; Described increasing magnetic conductance arc device comprises that one end of an increasing magnetic conductance arc part, this increasing magnetic conductance arc part is electrically connected with described yoke, the other end stretches in the arc leading angle of fixed contact of described miniature circuit breaker, and be greater than 0 with the distance of the fixed contact of described miniature circuit breaker, and be less than or equal to 1mm; The material of described increasing magnetic conductance arc part is permeability magnetic material; Described yoke is electrically connected with fixed contact.
Preferred technical scheme is: described permeability magnetic material is iron.
Preferred technical scheme is: the mode of described electrical connection is welding.
For achieving the above object, the second technical scheme that the present invention adopts is: a kind of miniature circuit breaker, comprises arc control device, run-on tab, overcurrent tripping system, increases magnetic conductance arc part and fixed contact; Described overcurrent tripping system comprises overcurrent trip coil and U-shaped yoke, and this U-shaped yoke comprises the first extending arm and the second extending arm, and the first extending arm of described U-shaped yoke stretches in described overcurrent trip coil; The fixed contact of described miniature circuit breaker has the arc leading angle that bends to arc, and described U-shaped yoke is electrically connected with fixed contact; One end of described increasing magnetic conductance arc part is electrically connected with the second extending arm of U-shaped yoke, and the other end of described increasing magnetic conductance arc part stretches in the arc leading angle of described fixed contact, and is greater than 0 with the distance of the fixed contact of described miniature circuit breaker, and is less than or equal to 1mm; The material of described increasing magnetic conductance arc part is permeability magnetic material; That one end that described increasing magnetic conductance arc part is electrically connected with U-shaped yoke is positioned at a side of described arc control device, and one end of described run-on tab is positioned at the opposite side of arc control device, and the other end of described run-on tab and described fixed contact interval arrange.
Preferred technical scheme is: described permeability magnetic material is iron.
Preferred technical scheme is: the mode of described electrical connection is welding.
Because technique scheme is used, the present invention compared with prior art has following advantages and effect:
1, the present invention has increased increasing magnetic conductance arc part in miniature circuit breaker, in the time that arc motion arrives the afterbody of fixed contact, owing to increasing magnetic conductance arc part near fixed contact, and it is very little to increase magnetic conductance arc part and fixed contact gap between the two, made by permeability magnetic material owing to increasing magnetic conductance arc part in addition, the arc root of electric arc will easily be transferred to and increase on magnetic conductance arc part, at this moment increase magnetic conductance arc part and work to lead arc, then under the effect of arc control device, electric arc is inhaled into arc control device, thus quick extinguish arcs.
2, enter arc control device because increasing magnetic conductance arc part of the present invention can accelerate electric arc, therefore can significantly improve breaking capacity and the electric life of miniature circuit breaker.
Brief description of the drawings
Accompanying drawing 1 is miniature circuit breaker schematic diagram of the present invention.
Accompanying drawing 2 is for increasing the schematic diagram of magnetic conductance arc device embodiments one.
Accompanying drawing 3 is for increasing the schematic diagram of magnetic conductance arc device embodiments two.
In above accompanying drawing, 1, arc control device; 2, U-shaped yoke; 3, overcurrent trip coil; 4, increase magnetic conductance arc part; 5, fixed contact; 6, operation and free tripping mechanism; 7, moving contact; 8, run-on tab.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Notice, appended graphic the illustrated structure of this specification, ratio, size etc., all contents in order to coordinate specification to disclose only, understand and read for person skilled in the art scholar, not in order to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, not affecting under effect that the present invention can produce and the object that can reach, all should still drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, in this specification, quote as " on ", the term of D score, " left side ", " right side ", " centre " and " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, changing under technology contents, when being also considered as the enforceable category of the present invention without essence.
Embodiment mono-: the increasing magnetic conductance arc device of miniature circuit breaker
Shown in accompanying drawing 1～accompanying drawing 5, the increasing magnetic conductance arc device of miniature circuit breaker, described miniature circuit breaker comprises fixed contact 5 and overcurrent tripping system, and described fixed contact 5 has the arc leading angle that bends to arc, and described overcurrent tripping system comprises a U-shaped yoke 2; Described increasing magnetic conductance arc device comprises that one end of an increasing magnetic conductance arc part 4, this increasing magnetic conductance arc part 4 is electrically connected with described U-shaped yoke 2, the other end stretches in the arc leading angle of fixed contact 5 of described miniature circuit breaker, and equals 1mm with the distance of the fixed contact 5 of described miniature circuit breaker; The material of described increasing magnetic conductance arc part is permeability magnetic material; Described U-shaped yoke 2 is electrically connected with fixed contact 5.
Embodiment bis-: there is the miniature circuit breaker that increases magnetic conductance arc device
Shown in accompanying drawing 1～accompanying drawing 5, a kind of miniature circuit breaker, comprises arc control device 1, run-on tab 8, overcurrent tripping system, increases magnetic conductance arc part 4 and fixed contact 5; Described overcurrent tripping system comprises overcurrent trip coil 3 and U-shaped yoke 2, and this U-shaped yoke 2 comprises the first extending arm and the second extending arm, and the first extending arm of described U-shaped yoke 2 stretches in described overcurrent trip coil 3; The fixed contact 5 of described miniature circuit breaker has the arc leading angle that bends to arc, and described U-shaped yoke 2 is welded with fixed contact 5, and concrete technical scheme is the first extending arm of described U-shaped yoke 2 and one end of the second extending arm junction and fixed contact 5 welding; The second extending arm welding of one end of described increasing magnetic conductance arc part 4 and U-shaped yoke 2, the other end of described increasing magnetic conductance arc part 4 stretches in the arc leading angle of described fixed contact 5, and equals 0.5mm with the distance of the fixed contact 5 of described miniature circuit breaker; The material of described increasing magnetic conductance arc part 4 is iron; That one end that described increasing magnetic conductance arc part 4 is electrically connected with U-shaped yoke 2 is positioned at a side of described arc control device 1, and one end of described run-on tab 8 is positioned at the opposite side of arc control device 1, and the other end of described run-on tab 8 and described fixed contact 5 intervals arrange.Moving contact 7 setting corresponding to fixed contact 5 of miniature circuit breaker.Miniature circuit breaker also comprises operation and free tripping mechanism 6, and the other parts of miniature circuit breaker adopt prior art.
In the time that short circuit appears in protective circuit, overcurrent tripping system works, makes operation and free tripping mechanism 6 trip frees, and moving contact 7 and fixed contact 5 separately, produce electric arc separately time.Electric arc enters arc control device 1 by run-on tab 8.Overcurrent tripping system is made up of overcurrent trip coil 3 and U-shaped yoke 2 etc.U-shaped yoke 2 is as the magnetic conductive loop of overcurrent trip coil 3, and in the time that electric arc enters arc control device 1, U-shaped yoke 2 is again as the electrode (arc root is in yoke) of electric arc, shown in accompanying drawing 4 and accompanying drawing 5.
In the time there is short trouble, miniature circuit breaker is trip free under the work of overcurrent tripping system, and at this moment moving contact 7 and fixed contact 5 separate, and produce electric arc.Because moving contact 7 and fixed contact 5 form a V-arrangement, the magnetic field of V-arrangement galvanic circle produces electric power, will order about electric arc outwards (downwards) move.Increasing magnetic conductance arc part 4 in fixed contact 5 inner sides is to be made by ferrous material, and this ferrous material will be strengthened the electric power of galvanic circle, and (at this moment increase magnetic conductance arc part 4 and work to increase magnetic field) accelerates outwards (downwards) motion of electric arc.Increasing magnetic conductance arc part 4 is to be welded in U-shaped yoke 2, forms electrical connection.U-shaped yoke 2 links together by the mode of welding or riveting with fixed contact 5, also forms electrical connection.
In the time that arc motion arrives the afterbody of fixed contact 5.Increase magnetic conductance arc part 4 and press close to fixed contact 5, gap is between the two very little.That ferrous material adds that gap is between the two very little owing to increasing magnetic conductance arc part 4.The arc root of electric arc will easily be transferred to and increase on magnetic conductance arc part 4 (at this moment increase magnetic conductance arc part 4 and work to lead arc), and at this moment, under the effect of arc control device 1, electric arc is inhaled into arc control device 1.Extinguish arcs fast.Enter arc control device 1 because increasing magnetic conductance arc part 4 can accelerate electric arc, therefore can significantly improve breaking capacity and the electric life of miniature circuit breaker.
Above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (6)
1. the increasing magnetic conductance arc device of miniature circuit breaker, described miniature circuit breaker comprises fixed contact and overcurrent tripping system, and described fixed contact has the arc leading angle that bends to arc, and described overcurrent tripping system comprises a yoke; It is characterized in that: described increasing magnetic conductance arc device comprises that one end of an increasing magnetic conductance arc part, this increasing magnetic conductance arc part is electrically connected with described yoke, the other end stretches in the arc leading angle of fixed contact of described miniature circuit breaker, and be greater than 0 with the distance of the fixed contact of described miniature circuit breaker, and be less than or equal to 1mm; The material of described increasing magnetic conductance arc part is permeability magnetic material; Described yoke is electrically connected with fixed contact.
2. the increasing magnetic conductance arc device of miniature circuit breaker according to claim 1, is characterized in that: described permeability magnetic material is iron.
3. the increasing magnetic conductance arc device of miniature circuit breaker according to claim 1, is characterized in that: the mode of described electrical connection is welding.
4. a miniature circuit breaker, is characterized in that: comprise arc control device, run-on tab, overcurrent tripping system, increase magnetic conductance arc part and fixed contact; Described overcurrent tripping system comprises overcurrent trip coil and U-shaped yoke, and this U-shaped yoke comprises the first extending arm and the second extending arm, and the first extending arm of described U-shaped yoke stretches in described overcurrent trip coil; The fixed contact of described miniature circuit breaker has the arc leading angle that bends to arc, and described U-shaped yoke is electrically connected with fixed contact; One end of described increasing magnetic conductance arc part is electrically connected with the second extending arm of U-shaped yoke, and the other end of described increasing magnetic conductance arc part stretches in the arc leading angle of described fixed contact, and is greater than 0 with the distance of the fixed contact of described miniature circuit breaker, and is less than or equal to 1mm; The material of described increasing magnetic conductance arc part is permeability magnetic material; That one end that described increasing magnetic conductance arc part is electrically connected with U-shaped yoke is positioned at a side of described arc control device, and one end of described run-on tab is positioned at the opposite side of arc control device, and the other end of described run-on tab and described fixed contact interval arrange.
5. miniature circuit breaker according to claim 4, is characterized in that: described permeability magnetic material is iron.
6. miniature circuit breaker according to claim 4, is characterized in that: the mode of described electrical connection is welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410101368.7A CN103871796A (en) | 2014-03-19 | 2014-03-19 | Magnetism enhancement and arc guide device of miniature circuit breaker and miniature circuit breaker provided with magnetism enhancement and arc guide device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410101368.7A CN103871796A (en) | 2014-03-19 | 2014-03-19 | Magnetism enhancement and arc guide device of miniature circuit breaker and miniature circuit breaker provided with magnetism enhancement and arc guide device |
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| Publication Number | Publication Date |
|---|---|
| CN103871796A true CN103871796A (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410101368.7A Pending CN103871796A (en) | 2014-03-19 | 2014-03-19 | Magnetism enhancement and arc guide device of miniature circuit breaker and miniature circuit breaker provided with magnetism enhancement and arc guide device |
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| CN (1) | CN103871796A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105321749A (en) * | 2014-07-30 | 2016-02-10 | 西门子公司 | Protective switch device and magnetic yoke |
| CN106653431A (en) * | 2017-03-13 | 2017-05-10 | 新驰电气有限公司 | Arc extinguishing system of residual current operated circuit breaker |
| CN108666184A (en) * | 2017-03-31 | 2018-10-16 | 温州圣普电气有限公司 | High current miniature circuit breaker |
| CN114446733A (en) * | 2022-01-19 | 2022-05-06 | 中群电气有限公司 | Intelligent miniature circuit breaker of thing networking |
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| CN2924772Y (en) * | 2005-12-05 | 2007-07-18 | 北京Abb低压电器有限公司 | Static contact base, arc-quenching system for miniature circuit breaker and miniature circuit breaker |
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| CN103426669A (en) * | 2013-09-02 | 2013-12-04 | 华坤电气有限公司 | Run-on plate |
| CN103500692A (en) * | 2013-09-30 | 2014-01-08 | 长城电器集团有限公司 | Arc extinguishing device of circuit breaker |
| CN203826320U (en) * | 2014-03-19 | 2014-09-10 | 云南追梦科技有限公司 | Magnetism-increasing and arc-guiding apparatus of miniature circuit breaker and miniature circuit breaker with magnetism-increasing and arc-guiding apparatus |
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- 2014-03-19 CN CN201410101368.7A patent/CN103871796A/en active Pending
Patent Citations (9)
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| US4714907A (en) * | 1985-07-31 | 1987-12-22 | Merlin Gerin | Miniature electrical circuit breaker with multiple moving contacts and thermomagnetic trip release |
| CN2924772Y (en) * | 2005-12-05 | 2007-07-18 | 北京Abb低压电器有限公司 | Static contact base, arc-quenching system for miniature circuit breaker and miniature circuit breaker |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105321749A (en) * | 2014-07-30 | 2016-02-10 | 西门子公司 | Protective switch device and magnetic yoke |
| CN105321749B (en) * | 2014-07-30 | 2019-08-30 | 西门子公司 | Protective switch equipment and magnetic yoke |
| CN106653431A (en) * | 2017-03-13 | 2017-05-10 | 新驰电气有限公司 | Arc extinguishing system of residual current operated circuit breaker |
| CN108666184A (en) * | 2017-03-31 | 2018-10-16 | 温州圣普电气有限公司 | High current miniature circuit breaker |
| CN108666184B (en) * | 2017-03-31 | 2023-08-15 | 温州圣普电气有限公司 | Large-current miniature circuit breaker |
| CN114446733A (en) * | 2022-01-19 | 2022-05-06 | 中群电气有限公司 | Intelligent miniature circuit breaker of thing networking |
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Application publication date: 20140618 |