CN86204642U - Direct-current magnetic field circuit breaker - Google Patents
Direct-current magnetic field circuit breaker Download PDFInfo
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- CN86204642U CN86204642U CN 86204642 CN86204642U CN86204642U CN 86204642 U CN86204642 U CN 86204642U CN 86204642 CN86204642 CN 86204642 CN 86204642 U CN86204642 U CN 86204642U CN 86204642 U CN86204642 U CN 86204642U
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- arc
- circuit breaker
- magnetic field
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Abstract
The utility model discloses a direct-current magnetic field circuit breaker. One magnetic blowout coil which main current does not pass under working state is arranged in the breaker, at normal working time, no current flows through the magnetic blowout coil. When the breaker cuts off the current, an electrical arc among contacts is moved to an arc angle, the magnetic blowout coil is conducted, which generates a strong magnetic flux, and a uniform magnetic field is formed. The electrical arc is quickly elongated under the action of the strong magnetic flux, and the electrical arc rapidly enters into an arc chute disc under the action of the image force of a grid disc. The circuit breaking appliance of the structure is characterized in that the utility model is of large potential gradient of an arc-extinguishing chamber, high voltage buildup speed and strong voltage buildup ability, and the direct-current magnetic field circuit breaker can be cooperated with a nonlinear resistor well, etc., providing reliable demagnetization and overvoltage protection for large and medium-sized generators.
Description
A kind of D.C. magnetic field circuit breaker, it belongs to the low-voltage electrical apparatus device.
Field circuit breaker, reached large and medium generator is played field suppression protection by circuit and device in failure of current moment, and its key is the upbuild voltage capacity and the voltage built-up rate of magnetic blow-out system and arc control device.And the magnetic blow-out system just produces magnetic blow-out magnetic field under "on" position.Utilize this magnetic field that electric arc is driven in arc control device in the moment of cutting off the power supply and carry out arc extinguishing.
Several magnetic blow-out system below both at home and abroad circuit breaker adopts usually:
1. the ALG and the ASLG Series Circuit Breakers of the production of Sweden ASEA company (are selected from the SK32-2E Edition2 of ASEA company, 1981-03 File Spart 2) and the magnetic blow-out system of the direct current quick breaker (selecting from the L 3.01.003E/0874Y1 of AEG-TELEFUNKEN factory sample) of the West Germany AEG company Gearapid S series of producing, form blowout coil and major loop series connection by magnetic blow-out and yoke.Principal current is by blowout coil during circuit breaker work, and main flux forms a uniform magnetic field in the arc control device bottom.During the circuit breaker breaking current, the contact that under the main flux effect, speeds away of the electric arc between contact, the arc root is along with arc angle moves up, and electric arc elongates to the rapid Yi Dong of arc control device And.Theoretically, the arc blow-out ability of this scheme is relevant with the principal current and the blowout coil number of turn, and when the number of turn is many, when electric current was big, upbuild voltage capacity and voltage built-up rate were quite high.In fact adopt this kind scheme to limit and build the pressure characteristic, have following shortcoming:
(1) build the pressure performance when reaching little electric current, the blowout coil number of turn is quite a lot of, and when big electric current disjunction because magnetic field intensity is very high, magnetic blow-out power is quite big, in case contact separately after, the electric arc contact that extremely speeds away, and contact does not reach enough gaps, the phenomenon of can restriking.
(2) during operate as normal, by principal current, coil is heating just in the blowout coil, and evil is encouraged in the many more just heatings of the number of turn more, and in order to satisfy the circuit breaker temperature rise, the cross section of coil copper bar is very big, and coil dimension is also quite big, and amount of copper consuming is many.
(3) owing to increased pyrotoxin (blowout coil), cause other cross section, galvanic circle partly to increase, corresponding minimizing heating to satisfy heat balance principle, the circuit breaker volume is increased, and blowout coil need be used the coiling of ladder type copper bar, processing difficulties.
(4) owing to have the arc blow-out yoke, increased the silicon steel sheet consumption.
2. the DS10-3000 of Lixin Electric Appliances Factory, Shanghai's production at the beginning of the seventies pacifies, and 1500 volts of high speed circuit breakers have arcing contact, adopts the series connection of blowout coil and arcing contact system.During operate as normal, only flow through the sub-fraction principal current in the blowout coil, most electric current passes through main contact system.When main contact separates moment, current transfer is to the arcing contact system, and blowout coil just flows through whole electric currents.Blowout coil produces magnetic flux in yoke, produce uniform magnetic field in the arc control device bottom, and arcing contact separates the electric arc that moment produces thereon and is elongated under the effect of uniform magnetic field, moves to arc control device top simultaneously.After the series connection of the blowout coil of this circuit breaker and arcing contact system again with main Chu Tou And connection, the blowout coil number of turn just can not be too many, avoids circuit breaker disconnection moment to influence principal current and move on to the arcing contact system from main contact, main contact can take place burn phenomenon.Because the number of turn can not be too many, magnetic blow-out power weakens.This breaker structure is complicated, and the silicon steel sheet consumption is more.
3. Siemens ZWV series and Japanese BWV Series Circuit Breakers (selecting from Siemens ARtiengesellschaft printed in theFederal Republic of Germang A G 3842.oM32d/e and Reprint from " Fuji Electric Review " VOL 18NO 3 1972) adopt iron core are installed on dynamic/static contact, after utilizing contact separately, electric current forms the magnetic blow-out loop around iron core, magnetic flux in the iron core forms uniform magnetic field below arc control device, electric arc elongates And and moves above arc control device rapidly under the effect in this magnetic field.The little electric current of this magnetic blow-out system's energy disjunction, but voltage built-up rate is slow when little electric current, and upbuild voltage capacity is poor.Be difficult to cooperate with the on state characteristic of nonlinear resistance.Build the pressure value when opening circuit when reaching the nonlinear resistance conduction value, the electric current that flows through in the circuit breaker descends rapidly, and the circuit breaker upbuild voltage capacity descends, and impels nonlinear resistance to recover blocking-up, can not realize reliably protecting.
The arc control device of circuit breaker divide two kinds of long arc and short arc arc extinguishings, DS7-1500 volt circuit breaker and the ZWV1500 of West Germany Siemens Company volt arc-extinguishing chamber of circuit breaker are to adopt three grid sheets and two kinds of arc quenching principles of concentrated type grid sheet, but the electric potential gradient in these two kinds of arc control device is lower, voltage built-up rate is slow, upbuild voltage capacity is poor, is difficult to directly be used with nonlinear resistance.In order to reach application target, need a cover control device during use, make the whole protecting device complicated, repair and maintenance inconvenience, the cost height, reliability reduces.Adopt ambipolar ， And to have a pair of normally closed master in demagnetization that Switzerland BBC company produces and the overvoltage protection and pay contact, this structure is comparatively complicated, the cost height.
Develop a kind of new field circuit breaker, simplify other control system and protect link, in working order down, principal current by blowout coil, does not produce magnetic field, and direct energy of And and nonlinear resistance cooperation reach large and medium generator demagnetization and overvoltage protection.
Central issue of the present utility model is the design of magnetic blow-out system and arc control device, makes its direct effectively and nonlinear resistance cooperation demagnetization and overvoltage protection.Its key is not allow principal current flow through blowout coil in working order down, and when arc extinguishing, produce rapidly a strong magnetic flux, the invention is characterized in moving contact 10,2～5mm place, top of fixed contact 11 is provided with the blowout coil 4 that does not pass through principal current under the normal operating conditions, one end of blowout coil and arc angle 3(also can with arc angle 12) bottom welds mutually, the other end connects bus-bar.Contain core insulator 6 and iron core 5 in the middle of the blowout coil 4, there are two magnetic clamping plate its both sides.Iron core and blowout coil mutually insulated.The cross sectional shape of iron core can be circular, square or other geometry.Arc angle lower end and the welding of blowout coil one end after 2～5mm place above the contact is fixing, also can place coil the optional position of circuit breaker by other type of attachment.
Arc extinguishing grid pieces 2 is made by the multi-disc steel plate, and how much quantity of grid sheet 2 depends on the rated operational voltage of circuit breaker, the requirement of building pressure and upbuild voltage capacity.Grid sheet 2 long 190mm, thick 3mm is outside to make " I " font with the cement of anti-electric arc or with other electric arc resistant material, and behind the synthetic arc-chute, adjacent two middle cavity sections are 14 * 40mm
2Also can be used in the direct current quick breaker if grid sheet lower end is exposed.The circuit breaker of this magnetic blow-out system and arc control device can be directly and the nonlinear resistance that do not have a controllable silicon jumper cooperate demagnetization and the overvoltage protection carry out large and medium generator, also can be used in the air circuit.
The utility model is when normal operation of circuit breaker, and load current is only by end of incoming cables, bus-bar, moving contact, movable contact rod, leading-out terminal, or opposite course, and does not form magnetic blow-out magnetic field without blowout coil.When the moment of contact breaking current, electric arc has just been transferred to arc angle from contact, just there is principal current to flow through in the blowout coil, thereby in iron core, produce a strong magnetic flux, magnetic flux forms a uniform magnetic field after through iron core both sides magnetic clamping plate in the arc control device bottom, electric arc enters the grid sheet that goes out rapidly at the rapid ， And that elongates under the effect of this high-intensity magnetic field under the effect of grid sheet image force.
Electric potential gradient in the utility model arc control device is big, and voltage built-up rate is fast, and upbuild voltage capacity is strong, has enough abilities to make the nonlinear resistance conducting, reaches large and medium generator demagnetization and overvoltage protection.Adopt this circuit breaker when the little electric current of disjunction, just to have enough upbuild voltage capacities and voltage built-up rate; simultaneously along with breaking current increases; the performance of upbuild voltage capacity and voltage built-up rate is also high more; do not need other additional control appliance; the whole protecting system is simple; easy to maintenance, safe and reliable, only save the controllable silicon jumper and save 50,000 yuan of RMB once overlapping.It also has following advantage: the performance that has improved the critical little electric current of disjunction; Can quicken arc motion, improve breaking capacity and shorten the quenching time; Do not have the heating phenomenon, blowout coil can design very for a short time.Owing to reduced pyrotoxin, the current density of breaker contact system and galvanic circle can improve, and has both saved copper material and silicon steel sheet, can also realize the miniaturization of circuit breaker.
Most preferred embodiment of the present utility model: blowout coil is turned to the circular coil of diameter 50mm by 3 * 8mm flat type copper wire, the number of turn and circuit breaker rated current, upbuild voltage capacity is relevant, generally get 5～10 circles, the utility model is used for 800 volts of circuit breakers and gets 5.6 circles, one end of coil welds mutually with the arc angle bottom, and the bottom of arc angle is installed on moving contact 4mm, and the other end of arc angle is screwed on the side plate of arc control device.Turn-to-turn is lined with the blowout coil of insulating trip and uses poured with epoxy resin all around.Iron core is processed into cylinder with electrical pure iron, and the core insulator that it is 1.5mm that the outside puts two wall thickness reinstalls in the circular hole of arc control device bottom clamping plate, and two outer magnetic clamping plate of And and dividing plate are collided.The blowout coil of insulation is enclosed within outside the iron core, is supported in the arc control device by the latter.Form one group with 25 sheet grating sheets and be installed on the arc control device upper baffle plate, the about 200mm of following end distance contact of arc extinguishing grid pieces is fixed on the breaker body with pivot pin.The nonlinear resistive element of Fig. 3 is directly inserted field circuit formation the utility model.
Structure of the present utility model and circuit are provided by following accompanying drawing.
Fig. 1 is a D.C. magnetic field circuit breaker front view.1 is meant arc control device and housing thereof among the figure; The 2nd, be contained in the grid sheet in the arc control device after synthesizing; 3, the 12nd, arc angle, weld mutually with blowout coil one end its lower end; The 4th, blowout coil and in be with core insulator 6 and be fitted together with iron core 5; 7 hard jockeys, the 8th, movable contact rod is equipped with moving contact 10 on it; The 9th, the stationary contact headstock is equipped with fixed contact 11 on it.
Fig. 2 is the structure of monolithic arc extinguishing grid pieces, the 1st, and the grid sheet that electric steel plate is made, the 2nd, the coating of grid sheet outer surface is with the cement of anti-electric arc or other electric arc resistant material.Fig. 3 is the synthetic structures of two sheet grating sheets, and 1 is the middle cavity after synthetic among the figure.
Fig. 4 is demagnetization and the overvoltage crowbar figure that nonlinear resistance cooperates, and 1 is the field power supply of circuit breaker among the figure, the 2nd, and field circuit breaker, the 3rd, diode, the 4, the 5th, znr, the 6th, motor-field winding.
Claims (4)
1, a kind of D.C. magnetic field circuit breaker.Usually form by the blowout coil by principal current, main contact, arcing contact, yoke, arc control device mechanism etc.Blowout coil just produces magnetic blow-out magnetic field once work.The utility model is characterised in that 2～5mm place is provided with a blowout coil that is not connected with the arc angle bottom by main electricity stream And in normal operation above moving contact and fixed contact, plays the blowout coil no current to flow through in working order and does not produce magnetic blow-out magnetic field.Just produce a strong magnetic flux in breaking current moment, and the arc control device formed of arc angle and arc extinguishing grid pieces.
2, blowout coil according to claim 1, contain cored in the middle of it is characterized in that, there are two magnetic clamping plate the iron core both sides, the core section shape can be circular, square or other geometry, after the arc angle lower end position was fixing, arc angle and coil can be made one, also can coil be placed the optional position of circuit breaker by other type of attachment.
3, arc control device according to claim 1 is characterized in that by 25 length of a film 190mm, wide 50mm, and thick 3mm electric steel plate, the outside has the cement of anti-electric arc or other electric arc resistant material to make " I " font, and behind the synthetic arc-chute, two middle cavity sections are 14 * 40mm
2
4, according to claim 1 or 3 described circuit breaker and arc control device, it is characterized in that can be directly and the nonlinear resistance that do not have a controllable silicon jumper cooperate and to carry out demagnetization and overvoltage protection, also can be used for air circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86204642 CN86204642U (en) | 1986-09-17 | 1986-09-17 | Direct-current magnetic field circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86204642 CN86204642U (en) | 1986-09-17 | 1986-09-17 | Direct-current magnetic field circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86204642U true CN86204642U (en) | 1987-06-24 |
Family
ID=4807662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86204642 Withdrawn CN86204642U (en) | 1986-09-17 | 1986-09-17 | Direct-current magnetic field circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86204642U (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615536A (en) * | 2009-08-06 | 2009-12-30 | 乐清市牵引机电厂 | Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker |
| CN101615535A (en) * | 2009-08-06 | 2009-12-30 | 乐清市牵引机电厂 | A kind of permanent magnet opening and closing type DC intelligent circuit breaker |
| CN102592908A (en) * | 2012-02-22 | 2012-07-18 | 西安交通大学 | Low current electric arc magnetic blow-out device and arc-blowing method of medium-pressure direct current breaker |
| CN102709083A (en) * | 2012-06-01 | 2012-10-03 | 徐州志信电气科技有限公司 | Mining kilovolt-level double-pole single-breakpoint air isolation reversing switch |
| CN102915894A (en) * | 2012-10-29 | 2013-02-06 | 大全集团有限公司 | Arc blowing device of direct current circuit breaker |
| CN103824736A (en) * | 2014-03-02 | 2014-05-28 | 西安交通大学 | Direct current breaker with magnetic quenching device |
| CN104157503A (en) * | 2014-08-27 | 2014-11-19 | 武汉长海电气科技开发有限公司 | Direct current switch magnetic arc blasting device |
| KR101818565B1 (en) | 2016-10-21 | 2018-01-15 | 주식회사 우진기전 | Arc chute of magnetic contactor |
| CN110504117A (en) * | 2019-08-27 | 2019-11-26 | 西南交通大学 | A kind of symmetrical double helix autoexcitation magnetic-quenching arc-extinguishing device of T-type |
| CN111584293A (en) * | 2019-05-21 | 2020-08-25 | 杭州德睿达电气有限公司 | Contact system of direct current quick circuit breaker |
| CN111584321A (en) * | 2019-05-21 | 2020-08-25 | 杭州德睿达电气有限公司 | Magnetic quenching system of direct-current quick circuit breaker |
| CN113690111A (en) * | 2021-07-14 | 2021-11-23 | 上海立新电器控制设备有限公司 | Arc included angle arc extinguishing structure for circuit breaker |
-
1986
- 1986-09-17 CN CN 86204642 patent/CN86204642U/en not_active Withdrawn
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615536B (en) * | 2009-08-06 | 2014-07-09 | 乐清市牵引机电厂 | Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker |
| CN101615535A (en) * | 2009-08-06 | 2009-12-30 | 乐清市牵引机电厂 | A kind of permanent magnet opening and closing type DC intelligent circuit breaker |
| CN101615536A (en) * | 2009-08-06 | 2009-12-30 | 乐清市牵引机电厂 | Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker |
| CN102592908A (en) * | 2012-02-22 | 2012-07-18 | 西安交通大学 | Low current electric arc magnetic blow-out device and arc-blowing method of medium-pressure direct current breaker |
| CN102709083A (en) * | 2012-06-01 | 2012-10-03 | 徐州志信电气科技有限公司 | Mining kilovolt-level double-pole single-breakpoint air isolation reversing switch |
| CN102915894B (en) * | 2012-10-29 | 2015-10-28 | 大全集团有限公司 | Arc-blowing device of direct-current circuit breaker |
| CN102915894A (en) * | 2012-10-29 | 2013-02-06 | 大全集团有限公司 | Arc blowing device of direct current circuit breaker |
| CN103824736A (en) * | 2014-03-02 | 2014-05-28 | 西安交通大学 | Direct current breaker with magnetic quenching device |
| CN103824736B (en) * | 2014-03-02 | 2016-01-06 | 西安交通大学 | A kind of DC circuit breaker with magnetic-quenching arc-extinguishing device |
| CN104157503A (en) * | 2014-08-27 | 2014-11-19 | 武汉长海电气科技开发有限公司 | Direct current switch magnetic arc blasting device |
| KR101818565B1 (en) | 2016-10-21 | 2018-01-15 | 주식회사 우진기전 | Arc chute of magnetic contactor |
| CN111584293A (en) * | 2019-05-21 | 2020-08-25 | 杭州德睿达电气有限公司 | Contact system of direct current quick circuit breaker |
| CN111584321A (en) * | 2019-05-21 | 2020-08-25 | 杭州德睿达电气有限公司 | Magnetic quenching system of direct-current quick circuit breaker |
| CN111584321B (en) * | 2019-05-21 | 2022-06-10 | 杭州德睿达电气有限公司 | Magnetic quenching system of direct-current quick circuit breaker |
| CN111584293B (en) * | 2019-05-21 | 2022-06-10 | 杭州德睿达电气有限公司 | Contact system of direct current quick circuit breaker |
| CN110504117A (en) * | 2019-08-27 | 2019-11-26 | 西南交通大学 | A kind of symmetrical double helix autoexcitation magnetic-quenching arc-extinguishing device of T-type |
| CN110504117B (en) * | 2019-08-27 | 2021-07-06 | 杭州德睿达电气有限公司 | T-shaped symmetrical double-helix self-excitation magnetic quenching device |
| CN113690111A (en) * | 2021-07-14 | 2021-11-23 | 上海立新电器控制设备有限公司 | Arc included angle arc extinguishing structure for circuit breaker |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |