CN201886996U - Circuit breaker with compulsory arc partitioning device - Google Patents
Circuit breaker with compulsory arc partitioning device Download PDFInfo
- Publication number
- CN201886996U CN201886996U CN 201020650048 CN201020650048U CN201886996U CN 201886996 U CN201886996 U CN 201886996U CN 201020650048 CN201020650048 CN 201020650048 CN 201020650048 U CN201020650048 U CN 201020650048U CN 201886996 U CN201886996 U CN 201886996U
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- Prior art keywords
- arc
- circuit breaker
- moving contact
- contact
- lever
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Abstract
The utility model relates to a circuit breaker with a compulsory arc partitioning device, which comprises a shell, a moving contact and a static contact, wherein a lever made of insulating material and consisting of a left actuating arm, a right actuating arm and a fulcrum is arranged in the shell; in the process of separating the moving contact and the static contact, the left actuating arm of the lever can be inserted into a gap between the moving contact and the static contact because the right actuating arm is pushed towards the right by the moving contact; and in the process of closing the moving contact and the static contact, the left actuating arm of the lever can be pushed towards the left by the moving contact to retreat from the gap between the moving contact and the static contact. The circuit breaker has a simple structure, acts reliably, and can quickly partition an electric arc when the moving contact and the static contact are separated, the electric arc voltage is increased, the breaking capacity and the current limiting capacity of the circuit breaker are greatly improved, the application range of the circuit breaker is enlarged, and reversible protection is realized.
Description
Technical field
The utility model relates to a kind of circuit breaker of forcing arc insulating apparatus that has.
Background technology
In order to protect user self Electrical Safety; circuit breaker all can be installed usually as protection electrical equipment in electric power system; along with improving constantly of power industry and electricity consumption level; the performance of circuit breaker, quality, kind etc. are required also more and more higher, the circuit breaker of real an urgent demand development of miniaturized, high breaking capacity.As everyone knows, in the process of circuit breaker disjunction, electric arc can be produced between moving contact and the fixed contact,,, the breaking capacity and the current limiting performance of circuit breaker will be directly influenced if can not in time extinguish because electric arc has electric conductivity.Therefore, for breaking capacity and the current limiting capacity that improves circuit breaker, should electric arc be extinguished rapidly.
The existing circuit breaker arc quenching system generally all adopts grid sheet short arc principle, and the magnetic field that relies on the contact galvanic circle to produce is ordered about electric arc and entered arc control device, and then extinguish arcs.But conventional grid chip arc control device are difficult to make that electric arc in time extinguishes, each producer also improves arc-suppressing method constantly, improve breaking capacity, as the method for the gas blast arc-quenching adopted, help cooling off electric arc on the one hand, rely on air-flow to order about electric arc on the other hand and enter the grid sheet; For the direct current arc quenching system, some producer's employing magnet is introduced arc control device with electric arc and is extinguished, and is difficult to block the problem of extinguishing to solve electric arc between contact.The improvement of above-mentioned arc-suppressing method though can improve arc quenching effect, improves the breaking capacity of circuit breaker to a certain extent, still can not play the effect of when the circuit breaker disjunction rapid disjunction and extinguish arcs, thereby directly influences the breaking capacity of circuit breaker; Simultaneously, adopt the method for magnet striking can limit its range of application in the direct current arc quenching system, promptly the mode of connection is limited, can't realize reversible protection.So-called reversible protection is meant no matter be that forward and reverse fault electric current all can be realized reliably protecting for direct current system.
Can between two contacts, produce electric arc during the dynamic and static contact disjunction of circuit breaker, comprise four-stage in general, be i.e. mechanism action time, electric arc dead time, arc motion time and arc extinction time from short circuit current to arc extinction occurring.In first stage, the arc voltage at contact two ends is zero, and the second stage arc voltage changes little, elongates at phase III electric arc, and electric arc leaves contact and enters arc extinguishing grid pieces by arc angle, and this stage arc voltage increases fast.Enter the grid sheet at quadravalence section electric arc, arc voltage reaches maximum, and during greater than the supply voltage instantaneous value, electric current is forced to reduce, and then arc extinction.The arc voltage size and the rate of climb are the decision keys of extinguish arcs fast, and arc voltage comprises arc cathode pressure drop, anode drop and voltage drop in arc column in general, and is directly proportional with the arc resistance size.Therefore, can improve arc voltage, arc extinction the most at last by the method that improves arc resistance.
The utility model content
Based on above-mentioned, the purpose of this utility model provides a kind of circuit breaker of forcing arc insulating apparatus that has of simple in structure, reliable in action, and it can cut off electric arc rapidly when dynamic and static contact disjunction, improve arc resistance, significantly improves the breaking capacity of circuit breaker; Simultaneously can realize reversible protection, enlarge the range of application of circuit breaker.
The solution that the utility model adopts is:
A kind of circuit breaker with pressure arc insulating apparatus comprises shell, moving contact, fixed contact, wherein:
The lever that adopts insulating material to be made of the left arm of force, the right arm of force and fulcrum is housed in the described shell; In moving contact and fixed contact separating process, the left arm of force of described lever can be promoted to the right to insert in the gap between moving contact and the fixed contact by moving contact because of the right arm of force; In moving contact and fixed contact closing course, the left arm of force of described lever can be promoted left by moving contact and withdraw from gap between moving contact and the fixed contact.
Further:
Angle between the described left arm of force and the right arm of force is less than 180 degree.
Described lever is connected with other parts in shell or the shell versatilely through its fulcrum.
Described fulcrum is arranged on the axis hole of lever bottom, or is arranged on a pair of projection or the pit of the front and back sides of lever.
When moving contact is done the disconnection motion and is produced the gap fixed contact, the right arm of force of lever under the ordering about of moving contact to lower swing, make left arm of force perk and being inserted in the gap between the dynamic and static contact, thereby play the effect of forcing to cut off electric arc, improve the breaking capacity of circuit breaker.When moving contact was done closing motion to fixed contact, the left arm of force of lever to lower swing, withdrawed from the gap between driven, the fixed contact under the ordering about of moving contact, the then perk of the right arm of force of lever, thus do not influence the connection of circuit.
Simple in structure, the reliable in action of the utility model can be cut off electric arc rapidly when dynamic and static contact disjunction, improves arc voltage, significantly improves the breaking capacity and the current limiting capacity of circuit breaker, enlarges the range of application of circuit breaker, realizes reversible protection.
Description of drawings
Fig. 1 is for forcing the structural representation of arc insulating apparatus;
Fig. 2 is that the pressure arc insulating apparatus is applied to the schematic diagram in the dual-interruption point breaker;
Fig. 3 is for forcing the schematic diagram in the gap between the arc insulating apparatus insertion dynamic/static contact;
Fig. 4 withdraws from the schematic diagram in the gap between the dynamic/static contact for forcing arc insulating apparatus.
Embodiment
The utility model relates to a kind of circuit breaker of forcing arc insulating apparatus that has, and this circuit breaker comprises shell, handle, end of incoming cables, magnetic release, thermal overload release, moving contact, fixed contact, arc insulating apparatus, pressure arc insulating apparatus, arc control device, striking sheet, leading-out terminal.Wherein except that arc insulating apparatus and pressure arc insulating apparatus, other parts are similar with conventional circuit breaker, no longer describe at this, only describe the pressure arc insulating apparatus part of circuit breaker.Wherein:
As shown in Figure 1, the lever of this pressure arc insulating apparatus 2 for adopting insulating material to constitute by the left arm of force, the right arm of force and fulcrum, the angle between the left arm of force and the right arm of force is less than 180 degree.
This pressure arc insulating apparatus is contained in the case for circuit breaker, is connected with other parts in shell or the shell versatilely through the fulcrum of its lever.
In an application example of the present utility model shown in Figure 2, circuit breaker is a dual-interruption point breaker, insert and put an arc insulating apparatus 1 between its two groups of contacts, connect two on the arc insulating apparatus 1 versatilely and force arc insulating apparatus 2, arc insulating apparatus 1 and pressure arc insulating apparatus 2 are all made with insulating material.
The following describes action principle.
See also Fig. 3, in moving contact 6 and fixed contact 5 separating process, when 6 pairs of fixed contacts 5 of moving contact are done the disconnection motion and are produced the gap, the right arm of force of lever under the ordering about of moving contact 6 to lower swing, make and left arm of force perk and being inserted in the gap between the dynamic and static contact most of electric arc is cut off rapidly, make the electric arc of fixed contact part move to the arc control device direction along last arc angle, the electric arc of moving contact part also moves towards the arc control device direction along following arc angle, and then is extinguished by arc control device; Remaining a small amount of electric arc is forced to arc insulating apparatus 2 to be forced to elongate, and arc resistance is improved rapidly, and then arc voltage increases rapidly, has significantly reduced the time that electric arc is extinguished, thereby has significantly improved the breaking capacity and the current limiting capacity of circuit breaker.
See also Fig. 4, in the process of moving contact 6 and fixed contact 5 closures, the left arm of force of lever to lower swing, withdraws from the gap between driven, the fixed contact under the ordering about of moving contact 6, the then perk of the right arm of force of lever, thus do not influence the connection of circuit.
In the present embodiment, the fulcrum of the lever of pressure arc insulating apparatus 2 is arranged on the axis hole 3 of lever bottom, and axis hole 3 flexibly connects by an axle and arc insulating apparatus 1.In addition, the fulcrum of lever also can be arranged on a pair of projection or the pit of the front and back sides of lever.The fulcrum of lever is connected with other parts in shell or the shell versatilely, as long as can realize swing or rotate.
Claims (5)
1. one kind has the circuit breaker of forcing arc insulating apparatus, comprises shell, moving contact, fixed contact, it is characterized in that:
The lever that adopts insulating material to be made of the left arm of force, the right arm of force and fulcrum is housed in the described shell;
In moving contact and fixed contact separating process, the left arm of force of described lever can be promoted to the right to insert in the gap between moving contact and the fixed contact by moving contact because of the right arm of force;
In moving contact and fixed contact closing course, the left arm of force of described lever can be promoted left by moving contact and withdraw from gap between moving contact and the fixed contact.
2. the circuit breaker with pressure arc insulating apparatus as claimed in claim 1 is characterized in that:
Angle between the described left arm of force and the right arm of force is less than 180 degree.
3. the circuit breaker with pressure arc insulating apparatus as claimed in claim 1 or 2 is characterized in that:
Described lever is connected with other parts in shell or the shell versatilely through its fulcrum.
4. the circuit breaker with pressure arc insulating apparatus as claimed in claim 3 is characterized in that:
Described fulcrum is arranged on the axis hole of lever bottom.
5. the circuit breaker with pressure arc insulating apparatus as claimed in claim 3 is characterized in that:
Described fulcrum is arranged on a pair of projection or the pit of the front and back sides of lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020650048 CN201886996U (en) | 2010-12-03 | 2010-12-03 | Circuit breaker with compulsory arc partitioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020650048 CN201886996U (en) | 2010-12-03 | 2010-12-03 | Circuit breaker with compulsory arc partitioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201886996U true CN201886996U (en) | 2011-06-29 |
Family
ID=44184545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020650048 Expired - Lifetime CN201886996U (en) | 2010-12-03 | 2010-12-03 | Circuit breaker with compulsory arc partitioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201886996U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486982A (en) * | 2010-12-03 | 2012-06-06 | 北京人民电器厂有限公司 | Breaker with forced flash barrier device |
| CN103065894A (en) * | 2011-10-24 | 2013-04-24 | 首瑞（北京）投资管理集团有限公司 | Contact system of breaker |
| CN103681145A (en) * | 2012-08-30 | 2014-03-26 | 西门子公司 | Arc extinguishing device and circuit breaker adopting same |
-
2010
- 2010-12-03 CN CN 201020650048 patent/CN201886996U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486982A (en) * | 2010-12-03 | 2012-06-06 | 北京人民电器厂有限公司 | Breaker with forced flash barrier device |
| CN103065894A (en) * | 2011-10-24 | 2013-04-24 | 首瑞（北京）投资管理集团有限公司 | Contact system of breaker |
| CN103681145A (en) * | 2012-08-30 | 2014-03-26 | 西门子公司 | Arc extinguishing device and circuit breaker adopting same |
| CN103681145B (en) * | 2012-08-30 | 2016-06-22 | 西门子公司 | Arc-control device and adopt the chopper of this arc-control device |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |