CN201773805U - Combined magnetic-quenching arc-extinguishing device - Google Patents
Combined magnetic-quenching arc-extinguishing device Download PDFInfo
- Publication number
- CN201773805U CN201773805U CN2010202658677U CN201020265867U CN201773805U CN 201773805 U CN201773805 U CN 201773805U CN 2010202658677 U CN2010202658677 U CN 2010202658677U CN 201020265867 U CN201020265867 U CN 201020265867U CN 201773805 U CN201773805 U CN 201773805U
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- arc
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- magnet steel
- insulating support
- magnetic
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Abstract
The utility model relates to a combined magnetic-quenching arc-extinguishing device. The device comprises two fixed contacts, an insulation bracket, permanent magnet steel, a grid-chip arc extinguishing chamber and a moving contact. The combined magnetic-quenching arc-extinguishing device can fulfill the aims of speeding up an arc-extinguishing speed and improving arc-extinguishing capacity in a simplest and easiest processing mode on the premise of not increasing the overall dimension of a breaker and reserving the structural form of a conventional breaker.
Description
Technical field
The utility model relates to a kind of combination magnetic quenching device, belongs to the low-voltage electrical apparatus field.
Background technology
Along with the increase day by day to power requirement, large power supply comes into operation, and makes also increase thereupon of short circuit current in the electrical network, and the impetus above the conventional circuit breaker breaking capacity is arranged greatly.Further dwindle the size of circuit breaker, the inexorable trend that the raising breaking capacity has become development.
Has arc-control device in the breaker of plastic casing, the core component when arc-control device is disjunction.The common method of extinguishing direct-current arc is to improve arc voltage.Usually the approach that improves arc voltage has: 1. increase total proximal pole pressure drop, electric arc is divided into the short arc of many series connection with grid chip arc control device; 2. the increase arc length increases arc resistance and reduces electric current, accelerates arc extinction.
The proximal pole pressure drop mainly is made up of the negative electrode and the anode drop of arc extinguishing grid pieces.The proximal pole pressure drop of every arc extinguishing grid pieces generation is about 28V, is reliable extinguish arcs in DC circuit, must select n sheet arc extinguishing grid pieces.N satisfies relational expression n＞U
g/ U
δ, U
gBe circuit breaker maximum operating voltage, U
δProximal pole pressure drop for the generation of monolithic arc extinguishing grid pieces.Arc extinguishing grid pieces thickness is approximately 1.5-3mm, and the gap between arc extinguishing grid pieces is generally 1.5-3mm.If increase total proximal pole pressure drop, will increase the quantity of arc extinguishing grid pieces, will certainly increase the size of circuit breaker.
Increase the adoptable measure of arc length: U type magnetic conduction grid sheet, magnetic blow-out technology, air-blow technology.Above measure can make electric arc that certain bending takes place, and has increased arc length to a certain extent.If will further increase arc length, need increase large opening, can cause the circuit breaker size to increase so again.
Owing to be subject to the circuit breaker own vol, its breaking capacity will be restricted, and the arc extinguishing ability just can't improve better.
The utility model content
The utility model provides a kind of combination magnetic quenching device, can be under the prerequisite that does not increase DC switchgear overall dimension, and accelerate arc extinguishing speed, improve the arc extinguishing ability in mode the simplest, the easiest processing.
For realizing the purpose of this utility model, the technical scheme that the utility model is taked is:
Combination magnetic quenching device in a kind of utmost point arcing chamber that is contained in Shell of circuit breaker comprises insulating support and arc control device, it is characterized in that: two fixed contacts that are insulated the reliable insulation of support are housed on the described insulating support; Each fixed contact is respectively equipped with a contact point; In the left side of each contact point described arc control device are set respectively; A permanent-magnet steel is set respectively below each contact point, and after electric arc produced, electric arc was subjected to force direction towards arc control device in the magnetic field of permanent-magnet steel.
Described permanent-magnet steel is one of cylindrical, truncated cone-shaped, prismatic, terrace with edge shape.
Have the hole on the described insulating support, described permanent-magnet steel is contained in this hole on the insulating support.
The both sides of described each permanent-magnet steel respectively are provided with a magnetic conductive board, and permanent-magnet steel and magnetic conductive board are insulated support to be separated, and permanent-magnet steel interfixes with magnetic conductive board by the absorption affinity to magnetic conductive board.
Described arc control device are installed on the insulating support, and respective face positions on dependence insulating support and the Shell of circuit breaker.
Described two contact points are placed side by side.
The beneficial effects of the utility model are:
1. simple in structure, the processing and manufacturing difficulty is little, easy for installation;
2. the series connection of the electric arc on two fixed contacts, the arc length that has been multiplied cooperates the magnetic blow-out technology, and electric arc more F.F. is gone into arc control device, makes that the utilization of arc control device is more abundant, so aspect the raising arc extinguishing ability fairly obvious effect is being arranged.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is front view of the present utility model (hiding 8);
Fig. 3 is the vertical view (hiding 7,8) of Fig. 2;
Fig. 4 is the utility model (hiding 5,7,8) axle side schematic diagram;
Fig. 5 is Fig. 2 upward view (hiding 8).
Among the figure: 1-fixed contact, 2-fixed contact, 3-insulating support, 4-permanent-magnet steel, 5-magnetic conductive board, 6-grid chip arc control device, 7-moving contact, a utmost point arcing chamber of 8-circuit breaker.
Embodiment:
Below in conjunction with accompanying drawing the utility model is elaborated.
Shown in Fig. 1-5: in a utmost point arcing chamber 8 of circuit breaker, an insulating support 3 is set, fixed contact 1, fixed contact 2 are installed on insulating support 3, and fixed contact 1, fixed contact 2 are insulated support 3 and reliably insulate.Contact point 11 is set on the fixed contact 1, contact point 21 is set on the fixed contact 2.Contact point 11 and contact point 21 are placed side by side, moving contact 7 and contact point 11, contact point 21 bridge joints.By shown in Figure 2, can form conductive path to fixed contact 2 right-hand members from fixed contact 1 left end.
Two grid chip arc control device 6 are placed on contact point 11, contact point 21 left sides, and arc control device 6 rely on the respective face on insulating support and the Shell of circuit breaker to position.Be positioned on the insulating support 3 contact point 11, contact point 21 below have circular hole, a columniform permanent-magnet steel 4 is all placed in each circular hole the inside.Two permanent-magnet steel same polarities are placed in opposite directions, and after electric arc produced, electric arc was towards deleting chip arc control device 6 by force direction in the magnetic field that permanent-magnet steel produces.
For the influence that reduces external magnetic field, reduce magnetic circuit and disperse and then strengthen the magnetic blow-out effect, make magnetic blow-out more effective to the effect of the electric arc between the dynamic and static contact, be provided with magnetic conductive board 5 in the both sides of permanent-magnet steel 4, permanent-magnet steel 4 is insulated support 3 with magnetic conductive board 5 and separates, permanent-magnet steel interfixes with magnetic conductive board by the absorption affinity to magnetic conductive board.
The hole of opening on the insulating support 3 also can be prismatic hole, and permanent-magnet steel 4 also can be round platform, prism, terrace with edge shape.
The magnetic quenching process of this device is as follows: when contact point 11 on moving contact 7 and the fixed contact 1 and the contact point 21 on the fixed contact 2 contacted, fixed contact 1, moving contact 7, fixed contact 2 formed conductive paths.When described path flows through certain electric current, along with moving contact 7 and contact point 11, contact point 21 from touch the process of separating certain distance, pull out electric arc respectively between moving contact 7 and contact point 11, the contact point 21, since the insulating effect of insulating support 3, described two electric arc mutually insulateds.Arcing length minimum is that contact point 11 arrives moving contact 7 apart from sum to moving contact 7 and contact point 21.Along with the distance between moving contact 7 and contact point increases, described electric arc changes gaseous phase arc into by metallic phase arc.Owing to be provided with permanent-magnet steel 4, magnetic conductive board 5, the magnetic line of force of permanent-magnet steel 4 by the extremely adjacent magnetic conductive board 5 of N, to the magnetic conductive board 5 extremely adjacent with S, is got back to the S utmost point from the N utmost point then.Just exist the magnetic field of magnetic line of force direction basically identical between two magnetic conductive boards, gaseous phase arc just in time drops in this magnetic field, and electric arc is subjected to the effect of Lorentz force, and by the setting to permanent-magnet steel 4 polarity, electric arc is subjected to the force direction all can be towards arc control device 6 directions.Specifically, for example electric current flows into from fixed contact 1, and when fixed contact 2 flowed out, fixed contact 11 downside permanent-magnet steels 4 polarity are: as shown in Figure 3, downside was the N utmost point, and upside is the S utmost point; Fixed contact 21 downside permanent-magnet steels 4 polarity are: as shown in Figure 3, downside is the S utmost point, and upside is the N utmost point; Therefore, under the effect of Lorentz force, can impel electric arc to bend and be elongated quickly, the length of two sections serial arcs is increased simultaneously go forward side by side into arc control device 6 towards the direction of arc control device.And arc voltage is made up of arc resistance voltage and proximal pole pressure drop, and arc resistance voltage is directly proportional with arc length.Simultaneously, because applied voltage shared by two sections electric arcs, its applied voltage has only about original half concerning every section electric arc, and when arc voltage was higher than applied voltage, electric arc promptly can extinguish.
Claims (6)
1. the combination magnetic quenching device in the utmost point arcing chamber that is contained in Shell of circuit breaker comprises insulating support, permanent-magnet steel and arc control device, it is characterized in that:
Two fixed contacts that are insulated the reliable insulation of support are housed on the described insulating support;
Each fixed contact has a contact point respectively;
In the left side of each contact point described arc control device are set respectively;
A described permanent-magnet steel is set respectively below each contact point, and two permanent-magnet steel same polarities are placed in opposite directions.
2. combination magnetic quenching device according to claim 1 is characterized in that:
Described permanent-magnet steel is one of cylindrical, truncated cone-shaped, prismatic, terrace with edge shape.
3. combination magnetic quenching device according to claim 1 is characterized in that:
Have the hole on the described insulating support, described permanent-magnet steel is contained in this hole on the insulating support.
4. combination magnetic quenching device according to claim 1 is characterized in that:
The both sides of described each permanent-magnet steel respectively are provided with a magnetic conductive board, and permanent-magnet steel and magnetic conductive board are insulated support to be separated, and permanent-magnet steel interfixes with magnetic conductive board by the absorption affinity to magnetic conductive board.
5. combination magnetic quenching device according to claim 1 is characterized in that:
Described arc control device are installed on the insulating support, and respective face positions on dependence insulating support and the Shell of circuit breaker.
6. combination magnetic quenching device according to claim 1 is characterized in that:
Described two contact points are placed side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202658677U CN201773805U (en) | 2010-07-15 | 2010-07-15 | Combined magnetic-quenching arc-extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202658677U CN201773805U (en) | 2010-07-15 | 2010-07-15 | Combined magnetic-quenching arc-extinguishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201773805U true CN201773805U (en) | 2011-03-23 |
Family
ID=43753648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202658677U Expired - Lifetime CN201773805U (en) | 2010-07-15 | 2010-07-15 | Combined magnetic-quenching arc-extinguishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201773805U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102184815A (en) * | 2011-05-16 | 2011-09-14 | 法泰电器（江苏）股份有限公司 | Circuit breaker arc striking device |
| CN102339691A (en) * | 2010-07-15 | 2012-02-01 | 北京翠祥电器元件有限公司 | Combined magnetic-quenching device |
| CN103326177A (en) * | 2013-06-03 | 2013-09-25 | 四川永贵科技有限公司 | Magnetic quenching type high voltage electric connector |
| CN104040673A (en) * | 2011-11-10 | 2014-09-10 | Ls产电株式会社 | Molded-case circuit breaker |
| CN110491747A (en) * | 2019-09-19 | 2019-11-22 | 上海本固电气设备有限公司 | A kind of magnetic-quenching arc-extinguishing device for dc circuit breaker |
-
2010
- 2010-07-15 CN CN2010202658677U patent/CN201773805U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102339691A (en) * | 2010-07-15 | 2012-02-01 | 北京翠祥电器元件有限公司 | Combined magnetic-quenching device |
| CN102339691B (en) * | 2010-07-15 | 2014-11-19 | 北京翠祥电器元件有限公司 | Combined magnetic-quenching device |
| CN102184815A (en) * | 2011-05-16 | 2011-09-14 | 法泰电器（江苏）股份有限公司 | Circuit breaker arc striking device |
| CN104040673A (en) * | 2011-11-10 | 2014-09-10 | Ls产电株式会社 | Molded-case circuit breaker |
| CN104040673B (en) * | 2011-11-10 | 2016-11-16 | Ls产电株式会社 | Breaker of plastic casing |
| US9818560B2 (en) | 2011-11-10 | 2017-11-14 | Lsis Co., Ltd. | Molded-case circuit breaker |
| CN103326177A (en) * | 2013-06-03 | 2013-09-25 | 四川永贵科技有限公司 | Magnetic quenching type high voltage electric connector |
| CN110491747A (en) * | 2019-09-19 | 2019-11-22 | 上海本固电气设备有限公司 | A kind of magnetic-quenching arc-extinguishing device for dc 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: 20110323 |
|
| CX01 | Expiry of patent term |