CN100517538C - Current-limiting arc-control device of medium-voltage large current DC circuit breaker - Google Patents
Current-limiting arc-control device of medium-voltage large current DC circuit breaker Download PDFInfo
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- CN100517538C CN100517538C CNB2006101052530A CN200610105253A CN100517538C CN 100517538 C CN100517538 C CN 100517538C CN B2006101052530 A CNB2006101052530 A CN B2006101052530A CN 200610105253 A CN200610105253 A CN 200610105253A CN 100517538 C CN100517538 C CN 100517538C
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Abstract
A current limiting and arc distinguishing device of medium voltage large current DC breaker is prepared as setting right and left air cylinders at two ends of insulation media blocking plate, setting multiple arc distinguishing grid plate being arranged to each other in arc distinguishing chamber and arranging metal rod at middle of multiple arc distinguishing grid plate, setting symmetric arc guiding channels under said arc distinguishing grid plates, connecting active contact to conduction loop of wire feeding in end and connecting static contact to conduction loop of wire outgoing end.
Description
Technical field
The invention belongs to the current limiting technique of dc circuit breaker, relate to the arc-control device of pressing the dc circuit breaker of big electric current in a kind of being applied to, a kind of especially middle current-limiting arc-control device of pressing large current DC circuit breaker.
Background technology
Because the peculiar advantage of direct current network structure has the trend of being pressed the transition of ac/dc looped network by traditional low-voltage alternating-current radial pattern network in exchanging in fields such as naval vessel electric power.Therefore the research of carrying out direct current power system and the corollary equipment focus that become international.For direct current network, the shortage of dc circuit breaker makes one of its important step that becomes researching DC network protection action.And along with the increase of net capacity, significantly promoting of the short circuit current that causes has higher requirement for the current limiting capacity of dc circuit breaker.
Dc circuit breaker has the defencive function of reliable cut-out DC loop fault electric current, extensively adopts in the world.As can be known, the contact disjunction of dc circuit breaker mainly is a requirement extinguish arcs fast from the current limliting principle analysis, and direct voltage is invariable.Electric current is bigger, extinguish arcs, must suppress the free factor of electric arc, and strengthens going free factor.In the design of current limiting circuit breaker, following basic principle is arranged: 1) contact is opened rapidly; 2) improve arc voltage rapidly; 3) make final arc voltage value height; 4) dielectric strength is recovered fast.In decades, there have been many kinds of current limiting techniques in the low-voltage direct circuit breaker, to be widely used, particularly in recent years,, made current limiting technique that new development arranged along with the introducing of computer technology, control technology, new material technology and power electronic technology.Up to the present, the current limiting technique that is applied in the large current interruption device mainly contains: utilize electrodynamic repulsion force to quicken contact and separate method, the blowout coil method is forced air blow off, PTC resistance current limliting method, superconducting current-limiting method etc.
The conventional method of blowout coil is unidirectional magnetic blow-out, and electric arc straight line under the effect in magnetic field quickens, and can cause the free difficulty that disappears outside the grid sheet under the condition of the big electric current of middle pressure, and arcing phenomena is serious, and the free equipment volume that perhaps disappears increases.
The electrodynamic repulsion force method mostly is by adjusting the planform of contact arm, utilize the electrodynamic repulsion force of fault current generation, scolding open contact fast, having a large amount of circuit breakers to utilize this method to reach the current limliting purpose at present.But the electrodynamic repulsion force current-limiting method because the quality of the contact system of corresponding increase and inertia have restricted the rapidity of contact action, makes the purpose of current limliting be restricted under the situation that the circuit breaker rated capacity increases.
That is that all right at present is ripe for commercial Application for PTC resistance current limliting method and superconducting current-limiting method.
Summary of the invention
At defective or the deficiency that above-mentioned prior art exists, the object of the present invention is to provide the arc-control device of pressing the heavy DC current limiting circuit breaker in a kind of being applied to.
For achieving the above object, the present invention adopts following technical scheme:
Press the current-limiting arc-control device of large current DC circuit breaker in a kind of, the moving contact, the fixed contact that comprise arc control device and arc control device below, it is characterized in that moving contact and fixed contact below also have the dielectric barrier plate, dielectric barrier plate two ends are provided with left cylinder and right cylinder; Be provided with the arc extinguishing grid pieces of a plurality of mutual arrangements in the described arc control device, the centre of a plurality of arc extinguishing grid pieces is provided with Metallic rod, the below of arc extinguishing grid pieces also is provided with the striking road of symmetry, and the moving contact of arc control device below is connected with the galvanic circle, end of incoming cables, and fixed contact is connected with the leading-out terminal galvanic circle.
Some other characteristics of the present invention are, an end of described fixed contact has second, and the other end has the fixed contact spring, also have magnet between fixed contact spring and the leading-out terminal galvanic circle, and fixed contact can be around axle O
2Rotate.
One end of described moving contact has first, and the other end connects tripping spring, and moving contact can be around first rotation, and a side of moving contact is provided with combined floodgate push rod and closing coil.
Be provided with first piston in the described left cylinder, first piston links to each other with first push rod, and first piston moves up and down at the inwall of the left side, effect lower edge of first push rod cylinder.
Be provided with second piston in the described right cylinder, second piston links to each other with second push rod, and second piston moves up and down at the right cylinder inner wall in the effect lower edge of second push rod.
Described dielectric barrier plate is provided with Metallic rod is concentric, and the dielectric barrier plate can move up and down.
Press the current-limiting arc-control device of large current DC circuit breaker in of the present invention, owing to be provided with Metallic rod on arc control device central interior top, the Metallic rod below is provided with dielectric barrier plate and cylinder.In the separating brake process, the dielectric barrier plate moves upward and enters between moving contact, the fixed contact, electric arc is played the effect of elongating and cooling off.Simultaneously, the forced draft that produces in the cylinder blows to electric arc, quickens arc motion, reduces electric arc dead time.The fixed contact rear is provided with magnet, and the action of a magnetic field that magnet produces plays the purpose of quickening arc motion in electric arc.
Description of drawings
Fig. 1 is a closing position view of the present invention;
Fig. 2 is a separating brake process initial period schematic diagram of the present invention;
Fig. 3 is a separating brake process interstage schematic diagram of the present invention;
Fig. 4 is a sub-gate position configuration state schematic diagram of the present invention;
The present invention is described in further detail below in conjunction with embodiment that accompanying drawing and structural principle of the present invention and operation principle and inventor provide, need to prove, the embodiment that provides only is used for clearly understanding feature of the present invention and its advantage, and the present invention is not limited to this embodiment.
Embodiment
Referring to Fig. 1, press the current-limiting arc-control device of large current DC circuit breaker in of the present invention, the moving contact 9, the fixed contact 11 that comprise arc control device 3 and arc control device 3 belows, moving contact 9 and fixed contact 11 belows also have dielectric barrier plate 16, and dielectric barrier plate 16 two ends also have left cylinder 14 and right cylinder 15; Be provided with the arc extinguishing grid pieces 1 of a plurality of mutual arrangements in the arc control device 3, the centre of a plurality of arc extinguishing grid pieces 1 is provided with Metallic rod 2, the below of arc extinguishing grid pieces 1 also is provided with the striking road 4 of symmetry, the moving contact 9 of arc control device 3 belows is connected with galvanic circle, end of incoming cables 8, and fixed contact 11 is connected with leading-out terminal galvanic circle 13.
One end of fixed contact 11 has second O
2, the other end has fixed contact spring 10, also has magnet 12 between fixed contact spring 10 and the leading-out terminal galvanic circle 13, and fixed contact 11 can be around axle O
2Rotate.
One end of moving contact 9 has first O
1, the other end connects tripping spring 5, and moving contact 9 can be around first O
1Rotate, a side of moving contact 9 is provided with combined floodgate push rod 7 and closing coil 6.Be provided with first piston 17 in the cylinder 14 of a left side, first piston 17 links to each other with first push rod 18, and piston 17 can move up and down at the inwall of the left side, effect lower edge of push rod 18 cylinder 14.Be provided with second piston, 19, the second pistons 19 in the right cylinder 15 and link to each other with second push rod 20, second piston 19 moves up and down along right cylinder 15 inwalls under the effect of second push rod 20 equally.Dielectric barrier plate 16 and Metallic rod 2 concentric settings, and dielectric barrier plate 16 can move up and down.
Introduce the specific operation process of the arc-control device that the present invention relates to below in detail according to the separating brake process.
Referring to Fig. 1, arc-control device is in closing position, moving contact 9 and fixed contact 11 closures.Tripping spring 5 is in extended state, but because combined floodgate push rod 7 withstands moving contact 9, makes moving contact 9 to rotate, and combined floodgate push rod 7 provides contact pressure required when closing a floodgate.At this moment, dielectric barrier plate 16 is positioned at least significant end, first piston 17 is positioned at the lowermost end of left cylinder 14, second piston 19 is positioned at the lowermost end of right cylinder 15, about two cylinders 14,15 all be filled gas, during for separating brake process circuit breaker drop-out current in the arc control device 3 the gas forced-convection heat transfer prepare.
Arc-control device will begin the sub-switching operation process under the fault current situation.Referring to Fig. 2, closing coil 6 passes to reverse current, and combined floodgate push rod 7 moves to oblique rear, and moving contact 9 moves in the counterclockwise direction around axle O1 under the tension of tripping spring 5, and moving contact 9 separates with fixed contact 11, produces electric arc between moving contact 9 and the fixed contact 11.The magnetic field that the magnet 12 at fixed contact 11 rears produces is played and is quickened the purpose that electric arc moves upward.At this moment, dielectric barrier plate 16 moves upward, and enters between moving contact 9 and the fixed contact 11, elongates and cooling electric arc, makes arc voltage increase, and prevents the generation of puncture behind.At this moment, first push rod 18 in left cylinder 14 and the right cylinder 15 is with second push rod 20 promotes piston 17 respectively and second piston 19 moves upward, and impels left cylinder 14 and gas in the right cylinder 15 to make progress strongly and sprays.The air-flow of ejection blows to the arc root position of negative electrode and anode respectively, can play and reduce the dead time of electric arc on contact, the purpose that acceleration electric arc moves upward.Electric arc moves up to striking road 4 stepping of going forward side by side and goes into arc extinguishing grid pieces 1 under the comprehensive function of magnetic field, airflow field and dielectric barrier plate 16, is cut into several sections short arcs by arc extinguishing grid pieces 1, and arc voltage is able to rapid raising.
Referring to Fig. 3, the movement velocity of the movement velocity of dielectric barrier plate 16 and first piston 17 and second piston 19 is also inequality.The movement velocity of dielectric barrier plate 16 will be faster than the movement velocity of the first piston 17 and second piston 19.When dielectric barrier plate 16 moved to topmost position, the first piston 17 and second piston 19 did not move to topmost position.She Ji purpose is that electric arc is entered after the arc extinguishing grid pieces 1 like this, the first piston 17 and second piston 19 continue to move upward, make in the arc control device 3 and still can keep stronger air-flow, thereby the remaining hot gas that makes the contact gap is forced to dispel, medium recovery strength between contact is recovered rapidly, reaches the principle that current limiting circuit breaker designs desired high medium recovery speed.
Referring to Fig. 4, after dielectric barrier plate 16 moved to topmost position, the first piston 17 and second piston 19 continued to move upward, up to reaching final separating brake position shown in Figure 4.At this moment, tripping spring 5 is in release condition, and electric arc is extinguished under the comprehensive function of magnetic field, airflow field and dielectric barrier plate 16.
Claims (6)
1, a kind of middle current-limiting arc-control device of pressing large current DC circuit breaker, the moving contact (9), the fixed contact (11) that comprise arc control device (3) and arc control device (3) below, it is characterized in that, moving contact (9) and fixed contact (11) below also have dielectric barrier plate (16), and dielectric barrier plate (16) two ends also have left cylinder (14) and right cylinder (15); Be provided with the arc extinguishing grid pieces (1) of a plurality of mutual arrangements in the described arc control device (3), the centre of a plurality of arc extinguishing grid pieces (1) is provided with Metallic rod (2), the below of arc extinguishing grid pieces (1) also is provided with the striking road (4) of symmetry, the moving contact (9) of arc control device (3) below is connected with galvanic circle, end of incoming cables (8), and fixed contact (11) is connected with leading-out terminal galvanic circle (13).
2, middle current-limiting arc-control device of pressing large current DC circuit breaker as claimed in claim 1 is characterized in that an end of described fixed contact (11) has second (O
2), the other end has fixed contact spring (10), also has magnet (12) between fixed contact spring (10) and leading-out terminal galvanic circle (13), and fixed contact (11) can be around axle (O
2) rotate.
3, middle current-limiting arc-control device of pressing large current DC circuit breaker as claimed in claim 1 is characterized in that an end of described moving contact (9) has first (O
1), the other end connects tripping spring (5), and moving contact (9) can be around first (O
1) rotate, a side of moving contact (9) is provided with combined floodgate push rod (7) and closing coil (6).
4, middle current-limiting arc-control device of pressing large current DC circuit breaker as claimed in claim 1, it is characterized in that, be provided with first piston (17) in the described left cylinder (14), first piston (17) links to each other with first push rod (18), and first piston (17) moves up and down at the inwall of the effect lower edge left side cylinder (14) of first push rod (18).
5, middle current-limiting arc-control device of pressing large current DC circuit breaker as claimed in claim 1, it is characterized in that, be provided with second piston (19) in the described right cylinder (15), second piston (19) links to each other with second push rod (20), and second piston (19) moves up and down at right cylinder (15) inwall in the effect lower edge of second push rod (20).
6, middle current-limiting arc-control device of pressing large current DC circuit breaker as claimed in claim 1 is characterized in that, described dielectric barrier plate (16) and the concentric setting of Metallic rod (2), and dielectric barrier plate (16) can move up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101052530A CN100517538C (en) | 2006-12-22 | 2006-12-22 | Current-limiting arc-control device of medium-voltage large current DC circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101052530A CN100517538C (en) | 2006-12-22 | 2006-12-22 | Current-limiting arc-control device of medium-voltage large current DC circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101000834A CN101000834A (en) | 2007-07-18 |
| CN100517538C true CN100517538C (en) | 2009-07-22 |
Family
ID=38692752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101052530A Expired - Fee Related CN100517538C (en) | 2006-12-22 | 2006-12-22 | Current-limiting arc-control device of medium-voltage large current DC circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100517538C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102947912B (en) * | 2010-04-16 | 2015-07-22 | Abb技术有限公司 | Switch unit, method for assembling a switch unit, and circuit breaker for a medium voltage circuit |
| CN102024633A (en) * | 2010-12-03 | 2011-04-20 | 常熟开关制造有限公司(原常熟开关厂） | Arc striking/extinguishing mechanism of low-voltage circuit breaker |
| CN102592902B (en) * | 2012-02-22 | 2013-07-17 | 西安交通大学 | High-speed opening operation mechanism of middle-and-low-voltage direct-current circuit breaker |
| CN102592897B (en) * | 2012-02-22 | 2013-07-03 | 西安交通大学 | DC (direct current) circuit breaker rapid operating mechanism with current limiting characteristic |
| CN102592908B (en) * | 2012-02-22 | 2013-09-11 | 西安交通大学 | Low current electric arc magnetic blow-out device and arc-blowing method of medium-pressure direct current breaker |
| WO2014048459A1 (en) * | 2012-09-26 | 2014-04-03 | Siemens Aktiengesellschaft | Transducer arrangement for a photovoltaic system, and operating method for a photovoltaic system |
| CN103794424B (en) * | 2014-03-02 | 2016-05-11 | 西安交通大学 | A kind of dc circuit breaker |
| CN106783445B (en) * | 2016-12-12 | 2018-08-24 | 陶如意 | A kind of air flow partition formula arc-extinguishing mechanism of power circuit breaker |
| CN106783444B (en) * | 2016-12-12 | 2017-12-01 | 国网浙江临海市供电公司 | A kind of exchange type arc-extinguishing mechanism of power circuit breaker |
| CN107039201B (en) * | 2016-12-12 | 2018-02-06 | 林权豪 | A kind of contraction type arc-extinguishing mechanism of power circuit breaker |
| CN107527773B (en) * | 2017-08-23 | 2020-02-18 | 河北宝凯电气股份有限公司 | Universal circuit breaker with arc extinguishing performance |
| CN107342197B (en) * | 2017-08-23 | 2020-06-09 | 河北宝凯电气股份有限公司 | Arc extinguishing device of sliding plate type circuit breaker |
| CN107481823B (en) * | 2017-09-20 | 2023-08-01 | 广东电网有限责任公司湛江供电局 | Lightning-proof tripping self-arc-extinguishing parallel gap system for power distribution network |
-
2006
- 2006-12-22 CN CNB2006101052530A patent/CN100517538C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101000834A (en) | 2007-07-18 |
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