CN103943430A - Combined type universal air circuit breaker for both alternating-current circuit and direct-current circuit and arc extinction method of combined type universal air circuit breaker - Google Patents
Combined type universal air circuit breaker for both alternating-current circuit and direct-current circuit and arc extinction method of combined type universal air circuit breaker Download PDFInfo
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- CN103943430A CN103943430A CN201410133828.4A CN201410133828A CN103943430A CN 103943430 A CN103943430 A CN 103943430A CN 201410133828 A CN201410133828 A CN 201410133828A CN 103943430 A CN103943430 A CN 103943430A
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Abstract
The invention discloses a combined type universal air circuit breaker for both an alternating-current circuit and a direct-current circuit and an arc extinction method of the combined type universal air circuit breaker. The combined type universal air circuit breaker mainly comprises a contact, an arc running path system, a permanent magnet, a magnet exciting coil, an arc extinction grate sheet and the like. According to the combined type universal air circuit breaker, the permanent magnet and the magnet exciting coil are organically combined and act on different moving stages of an electric arc respectively, and aerogenesis materials are also used for enhancing the air blowing effect, so that the electric arc is driven to smoothly enter the arc extinction grate sheet. The combined type universal air circuit breaker can be applied to both the alternating-current circuit and the direct-current circuit and is simple in structure, high in reliability and wide in application range.
Description
Technical field
The invention belongs to field of circuit breakers, relate to a kind of air circuit and arc-suppressing method thereof of combined type AC/DC universal.
Background technology
Have higher requirement in the aspects such as along with the fast development of national economy, electric power system capacity and scale constantly expand, the safety and reliability of people to the quality of power supply, power supply.Air circuit is mainly used in distribution systems at different levels, plays control and protection in electrical network.Controlling is exactly according to operation needs, and the divide-shut brake by circuit breaker is by the equipment component in electrical network or circuit input or out of service; When electrical network or power equipment break down, during as overload or short circuit, circuit breaker can also be in time by faulty line excision, to prevent the expansion of fault and to protect other power equipments.
On the other hand, developing rapidly of the new forms of energy such as wind energy, solar energy and rail vehicle transportation industry, makes the application of direct current system increasingly extensive, also more urgent to the demand of DC circuit breaker.Electric current in AC system has two natural zero-crossing points at every cycle, and AC circuit breaker is exactly to complete medium recovery on opportunity of making full use of current over-zero, by arc extinction.But direct current system does not exist natural zero-crossing point, make to cut-off DC circuit much more difficult.The requirement that DC circuit breaker need to meet has:
(1) detect in time fault current;
(2) mechanism action is rapid, before fault current rises to peak value, by arc cutting, reaches the object of current limliting;
(3) on guaranteed performance basis, reduce costs.
For cost-saving, improve the versatility of circuit breaker, a kind of simple in structure, the air circuit that can be applied to effectively, reliably ac and dc systems is very important.
Summary of the invention
The problem that the present invention solves is to provide a kind of air circuit and arc-suppressing method thereof of combined type AC/DC universal, no matter exchange or DC circuit in, in the time that short trouble occurs, all can utilize the effect of magnetic field and airflow field to drive electric arc to enter arc extinguishing grid pieces, by fault current limitation zero passage.
The present invention is achieved through the following technical solutions:
A kind of combined type AC/DC universal air circuit, mainly comprise: the contact system, Pao Hu road, permanent magnet, magnet exciting coil and the arc extinguishing grid pieces that are formed by moving contact and fixed contact, wherein, Pao Hu offers breach on road, this breach Jiang Paohu road is divided into upper and lower two parts, a wire Yu Shangpaohu road of described magnet exciting coil connects, and an other wire Yu Xiapaohu road connects, and described fixed contact is arranged on Xia Paohu road; Described Pao Hu road comprises two, and arc extinguishing grid pieces is between Liang Gepaohu road; Described permanent magnet comprises two pairs, lays respectively at the both sides of two pairs of contacts, and the polarity of two pairs of permanent magnets is contrary; In the time producing electric arc between contact system, electric arc enters arc extinguishing grid pieces under the acting in conjunction in permanent magnet and magnet exciting coil generation magnetic field, causes that arc voltage raises, thus Limited Current zero passage.
Described contact system adopts bridge-type double-breakpoint structure.
Described permanent magnet is outside with gas exhausted material layer parcel, and gas exhausted material adopts PA66 or POM.
Described Shang Paohu road is not connected with fixed contact.
The upper Square wire Yu Shangpaohu road of described magnet exciting coil is connected to the indentation, there in Pao Hu road, and the junction in lower Square wire Yu Xiapaohu road is in fixed contact outside.
Described Pao Hu road is U-shaped structure, and upwards, arc extinguishing grid pieces is positioned in the middle of U-shaped opening U-shaped structural openings, and while making to burn on electric arc Pao Hu road, self-field produces actuating force upwards to it.
A kind of arc-suppressing method based on above-described air circuit, in the time producing electric arc between moving contact and fixed contact, under the magnetic fields producing at permanent magnet, electric arc is moved, wherein, the electric arc of one side moves towards the end in Pao Hu road, the electric arc of an other side moves up along Pao Hu road and arrives Shang Paohu road until upper arc root is crossed the breach in Pao Hu road, now, electric current will flow through magnet exciting coil, magnet exciting coil produces and permanent magnet magnetic field in the same way, further promote the movement of electric arc, until lower arc root jumps on another one Pao Hu road, this electric arc is burnt between Liang Gepaohu road, now, other one section of electric arc disappears, simultaneously, electric current flows through two magnet exciting coils, two magnet exciting coils are around on the contrary, produce stronger magnetic field in the same way, the common electric arc that drives moves, enter arc extinguishing grid pieces.
Compared with prior art, the present invention has following useful technique effect:
Air circuit provided by the invention, adopts permanent magnet and magnet exciting coil to act on respectively the different phase of arc motion, strengthens air-blowing effect in conjunction with gas exhausted material simultaneously, drives electric arc to enter arc extinguishing grid pieces, both can be used for AC system, also can be used for direct current system.In addition, this breaker structure is simple, and reliability is high, applied widely.
Brief description of the drawings
Fig. 1 is combined type AC/DC universal air circuit structural representation of the present invention;
Fig. 2 is that air circuit of the present invention cut-offs short-circuit current process schematic diagram, and wherein, (a) and (b), (c) are the schematic diagram of three different phases.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
As shown in Figure 1, a kind of air circuit, mainly comprises contact system, Pao Hu road 8, permanent magnet 5, magnet exciting coil 7, arc extinguishing grid pieces 9 etc.
Particularly, contact system adopts bridge-type double-breakpoint structure, comprises moving contact 1 and fixed contact 3, and Pao Hu road 8 be U-shaped structure, and centre, Pao Hu road is jagged 81, and this breach 81Jiang Paohu road is divided into upper and lower two parts; Upwards, arc extinguishing grid pieces is positioned in the middle of U-shaped opening U-shaped structural openings; Two pairs of permanent magnets 5 are arranged on respectively the both sides of two pairs of contact systems, and polarity is contrary, and permanent magnet 5 outsides are surrounded by gas exhausted material layer (gas exhausted material layer adopts PA66 or POM) simultaneously, for strengthening Arc In A Nozzle effect; Two wires of magnet exciting coil 7 are connected to the top and the bottom in Pao Hu road, Pao Hu road, the junction indentation, there in upper Square wire Yu Shangpaohu road, and the junction in lower Square wire Yu Xiapaohu road is in fixed contact outside.
Air circuit of the present invention, adopt permanent magnet and magnet exciting coil to act on respectively the different phase of arc motion, strengthen air-blowing effect in conjunction with gas exhausted material simultaneously, drive electric arc to enter fast arc extinguishing grid pieces, Limited Current zero passage, extinguish arcs, both can be used for AC system, also can be used for direct current system.
Flow to from left to right as example taking short circuit current below, three Main Stage of arc motion in described circuit breaker breaking course are set forth, short circuit current flows to situation from right to left similarly.
First stage as shown in Fig. 2 (a), short trouble occur time, dynamic/static contact separate, electric arc produces between contact, and permanent magnet produce magnetic field and air-blowing effect under to left movement, permanent magnet field direction is as shown in the figure.
Second stage is as shown in Fig. 2 (b), and two sections of electric arcs are further to left movement, the end in arc motion Dao Paohu road, left side, and on the electric arc of right side, arc Gen Yanpaohu road moves upward, and lower arc root continues to left movement.Permanent magnet outside is surrounded by gas exhausted material layer, under the ablation effect of electric arc, produce a large amount of hydrogen, compression arc strengthens Arc In A Nozzle effect on the one hand, accelerate arc motion, improve current limiting performance, on the other hand, hydrogen has very high heat dissipation ability, contribute to scattering and disappearing of arc energy, reduce arc temperature, reduce the ablation to electrode He Paohu road.Left side electric arc elongates, attenuates under high-intensity magnetic field and airflow function, more easily extinguishes.Right side electric arc is under elevated pressures, and current density increases, and has further promoted its motion under permanent magnet field.Jump over after Pao Hu road breach when arc root on the electric arc of right side, electric current will flow through magnet exciting coil, and magnet exciting coil and permanent magnet Matching installation produce and corresponding permanent magnet magnetic field in the same way, promote right side electric arc to move to grid sheet direction.
Phase III is as shown in Fig. 2 (c), along with electric arc further moves, the lower arc root of right side electric arc can jump on Pao Hu road, the left side, electric arc burns between Liang Gepaohu road, left and right, left side electric arc disappears, and electric current will flow through two magnet exciting coils, and two magnet exciting coils are around on the contrary, thereby produce stronger magnetic field in the same way, jointly drive arc motion.Pao Hu road, the junction indentation, there in Square wire Yu Shangpaohu road on two magnet exciting coils, the junction in lower Square wire Yu Xiapaohu road, in fixed contact outside, can ensure that electric arc self-field plays forward drive effect to electric arc to the motion of grid sheet.Electric arc, under magnetic field and air-blowing effect, continues to move upward, and enters arc extinguishing grid pieces, thereby is cut into several sections shorter electric arcs by grid sheet, and arc voltage rises rapidly, and when voltage is during higher than system pressure drop, fault current will reduce, and electric arc is tending towards extinguishing.
As mentioned above, in air circuit of the present invention, adopt permanent magnet and magnet exciting coil acting in conjunction, and strengthen the mode of air-blowing in conjunction with gas exhausted material, can be directly used in ac and dc systems, simple in structure, reliability is high, and practicality is wider.
Claims (7)
1. a combined type AC/DC universal air circuit, it is characterized in that, mainly comprise: the contact system, Pao Hu road (8), permanent magnet (5), magnet exciting coil (7) and the arc extinguishing grid pieces (9) that are formed by moving contact (1) and fixed contact (3), wherein, on Pao Hu road (8), offer breach (81), this breach (81) Jiang Paohu road is divided into upper and lower two parts, a wire Yu Shangpaohu road of described magnet exciting coil (7) connects, an other wire Yu Xiapaohu road connects, and described fixed contact (3) is arranged on Xia Paohu road; Described Pao Hu road (8) comprises two, and arc extinguishing grid pieces (9) is positioned between Liang Gepaohu road (8); Described permanent magnet (5) comprises two pairs, lays respectively at the both sides of two pairs of contact systems, and the polarity of two pairs of permanent magnets is contrary; In the time producing electric arc between contact system, electric arc enters arc extinguishing grid pieces under the acting in conjunction in permanent magnet and magnet exciting coil generation magnetic field, causes that arc voltage raises, thus Limited Current zero passage.
2. combined type AC/DC universal air circuit as claimed in claim 1, is characterized in that, described contact system adopts bridge-type double-breakpoint structure.
3. combined type AC/DC universal air circuit as claimed in claim 1, is characterized in that, described permanent magnet is outside with gas exhausted material layer parcel, and gas exhausted material adopts PA66 or POM.
4. combined type AC/DC universal air circuit as claimed in claim 1, is characterized in that, described Shang Paohu road is not connected with fixed contact.
5. combined type AC/DC universal air circuit as claimed in claim 1, is characterized in that, the upper Square wire Yu Shangpaohu road of described magnet exciting coil is connected to the indentation, there in Pao Hu road, and the junction in lower Square wire Yu Xiapaohu road is in fixed contact outside.
6. combined type AC/DC universal air circuit as claimed in claim 1, it is characterized in that, described Pao Hu road is U-shaped structure, and U-shaped structural openings upwards, arc extinguishing grid pieces is positioned in the middle of U-shaped opening, and while making to burn on electric arc Pao Hu road, self-field produces actuating force upwards to it.
7. the arc-suppressing method based on air circuit claimed in claim 1, it is characterized in that: in the time producing electric arc between moving contact and fixed contact, under the magnetic fields producing at permanent magnet, electric arc is moved, wherein, the electric arc of one side moves towards the end in Pao Hu road, the electric arc of an other side moves up along Pao Hu road and arrives Shang Paohu road until upper arc root is crossed the breach in Pao Hu road, now, electric current will flow through magnet exciting coil, magnet exciting coil produces and permanent magnet magnetic field in the same way, further promote the movement of electric arc, until lower arc root jumps on another one Pao Hu road, this electric arc is burnt between Liang Gepaohu road, now, other one section of electric arc disappears, simultaneously, electric current flows through two magnet exciting coils, two magnet exciting coils are around on the contrary, produce stronger magnetic field in the same way, the common electric arc that drives moves, enter arc extinguishing grid pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410133828.4A CN103943430A (en) | 2014-04-03 | 2014-04-03 | Combined type universal air circuit breaker for both alternating-current circuit and direct-current circuit and arc extinction method of combined type universal air circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410133828.4A CN103943430A (en) | 2014-04-03 | 2014-04-03 | Combined type universal air circuit breaker for both alternating-current circuit and direct-current circuit and arc extinction method of combined type universal air circuit breaker |
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| CN103943430A true CN103943430A (en) | 2014-07-23 |
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| CN201410133828.4A Pending CN103943430A (en) | 2014-04-03 | 2014-04-03 | Combined type universal air circuit breaker for both alternating-current circuit and direct-current circuit and arc extinction method of combined type universal air circuit breaker |
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| CN (1) | CN103943430A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109325314A (en) * | 2018-11-12 | 2019-02-12 | 西北工业大学 | A kind of low-voltage circuit breaker break performance optimization method based on grid voltage tester |
| CN110197781A (en) * | 2018-02-24 | 2019-09-03 | 嘉灵科技有限公司 | Structure for the double break contact with electromagnetism arc blow-out |
| CN110850242A (en) * | 2019-11-05 | 2020-02-28 | 深圳供电局有限公司 | Device and method for evaluating arc motion of high-voltage switch equipment with metal partition plate |
| CN112509892A (en) * | 2020-11-13 | 2021-03-16 | 江苏省如高高压电器有限公司 | Magnetic blow-out structure for direct current air circuit breaker |
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| US5130504A (en) * | 1990-08-29 | 1992-07-14 | Eaton Corporation | Bi-directional direct current switching apparatus having bifurcated arc runners extending into separate arc extinguishing chambers |
| CN101118817A (en) * | 2006-08-01 | 2008-02-06 | 沙尔特宝有限公司 | Switch for direct and alternating current operation |
| CN102412078A (en) * | 2010-09-20 | 2012-04-11 | 赛雪龙公司 | Electromechanical circuit breaker |
| CN103038847A (en) * | 2010-07-22 | 2013-04-10 | 沙尔特宝有限公司 | Unidirectionally switching DC contactor |
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2014
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Patent Citations (4)
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| US5130504A (en) * | 1990-08-29 | 1992-07-14 | Eaton Corporation | Bi-directional direct current switching apparatus having bifurcated arc runners extending into separate arc extinguishing chambers |
| CN101118817A (en) * | 2006-08-01 | 2008-02-06 | 沙尔特宝有限公司 | Switch for direct and alternating current operation |
| CN103038847A (en) * | 2010-07-22 | 2013-04-10 | 沙尔特宝有限公司 | Unidirectionally switching DC contactor |
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| 陈德桂: "低压灭弧***中产气材料的作用及其选择", 《低压电器》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110197781A (en) * | 2018-02-24 | 2019-09-03 | 嘉灵科技有限公司 | Structure for the double break contact with electromagnetism arc blow-out |
| CN109325314A (en) * | 2018-11-12 | 2019-02-12 | 西北工业大学 | A kind of low-voltage circuit breaker break performance optimization method based on grid voltage tester |
| CN109325314B (en) * | 2018-11-12 | 2022-06-21 | 西北工业大学 | Low-voltage circuit breaker switching-on and switching-off performance optimization method based on grid plate voltage test |
| CN110850242A (en) * | 2019-11-05 | 2020-02-28 | 深圳供电局有限公司 | Device and method for evaluating arc motion of high-voltage switch equipment with metal partition plate |
| CN110850242B (en) * | 2019-11-05 | 2021-08-31 | 深圳供电局有限公司 | Device and method for evaluating arc motion of high-voltage switch equipment with metal partition plate |
| CN112509892A (en) * | 2020-11-13 | 2021-03-16 | 江苏省如高高压电器有限公司 | Magnetic blow-out structure for direct current air circuit breaker |
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Application publication date: 20140723 |