CN1018870B - Vacuum circuit breaker - Google Patents
Vacuum circuit breakerInfo
- Publication number
- CN1018870B CN1018870B CN89101904A CN89101904A CN1018870B CN 1018870 B CN1018870 B CN 1018870B CN 89101904 A CN89101904 A CN 89101904A CN 89101904 A CN89101904 A CN 89101904A CN 1018870 B CN1018870 B CN 1018870B
- Authority
- CN
- China
- Prior art keywords
- coil
- breaker
- electromagnetism
- vacuum circuit
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
- H01H33/6641—Contacts; Arc-extinguishing means, e.g. arcing rings making use of a separate coil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/285—Power arrangements internal to the switch for operating the driving mechanism using electro-dynamic repulsion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for interrupting dc
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The fixed electrode and the movable electrode of a vacuum disconnecting switch are arranged in a vacuum vessel and are connected to a fixed and a movable bar , respectively which extend outwards out of the vacuum vessel. In the region of the fixed electrode , the vacuum vessel is externally surrounded by an electromagnetic repulsion winding and a short-circuiting ring which is coupled to the movable bar . An electromagnetic repulsion force produced between the short-circuiting ring and the repulsion windingis used for driving the movable bar in such a way that the electrodes are disconnected. The magnetic flux generated in this case in the short-circuiting ring produces a magnetic field which is parallel to the arc and opposes movement of the arc away from the electrodes .
Description
The present invention relates to one and have the vacuum circuit-breaker that improves electromagnetism repulsion coil arrangement.
Usually, a dc circuit breaker comprises a capacitor and a reactor, that is: the LC resonant circuit is parallel on the circuit breaker, for example vacuum circuit-breaker.When vacuum circuit-breaker is opened, allow a direct current flow through the LC resonant circuit, make it be converted to oscillating current, this electric current equally also flows through vacuum circuit-breaker.Oscillating current is cut off in zero-current point by the electrode of vacuum circuit-breaker.When a big direct current flows through the LC resonant circuit, unless beyond the situation of the contact disengaging time of vacuum circuit-breaker weak point, big direct current increased along with the time, had hindered failure of current unfriendly.
Therefore, conventional mechanical operating mechanism as connecting rod, has a restriction on the contact disengaging time that shortens vacuum circuit-breaker.In order to improve this point, a vacuum circuit-breaker and a circuit breaker exist, for example: propose among JP-A-59-224022 and the JP-U-50-34064.In carrying vacuum circuit-breaker and protective circuit, allow an electric current flow through electromagnetism and repel coil, by the electric current of responding on short board, the electromagnetic force that produces on the direction of repelling mutually opens circuit.
Yet in these circuit breakers, the contact separating rate is too fast again.When cutting off a big electric current, before the electric arc between fixed electrode and the movable electrode was fully elongated, the electric arc of lighting on movable electrode moved to bellows.Like this, because bellows is melted, the blocking performance just can not be improved.
The purpose of this invention is to provide a kind of vacuum circuit-breaker, wherein avoided electric arc beyond electrode, to locate burning, thereby improved opening performance.
This purpose of the present invention is by pair of stationary electrodes and movable electrode are set in the vacuum tank of vacuum circuit-breaker at least, by bar is extended to the outside of vacuum tank from these electrode back, by the short board that links to each other with movable rod with near fixed electrode and movable electrode, repel at the electromagnetism of vacuum tank outer setting that coil finishes.
When direct current flows through electromagnetism repulsion coil, produce magnetic flux.When this magnetic flux passed short board, magnetic flux produced an Eddy electric current on short board.Conflict mutually by the magnetic flux of Eddy electric current generation and the magnetic flux of electromagnetism repulsion coil sides.When magnetic flux was conflicted mutually, by the electromagnetic repulsion force that produces, short board and movable rod be high-speed mobile on the direction that they are separated from fixed electrode.During this period, the electric arc between fixed electrode and movable electrode still burns, and the magnetic flux that is repelled coil by electromagnetism still continues to provide a magnetic field parallel with electric arc.Therefore, make electric arc can not move to electrode place in addition, thereby strengthen the blocking performance.
A kind of vacuum circuit-breaker comprises:
At least one pair of fixed electrode (6) and movable electrode (7) are arranged in the vacuum tank (3);
A fixed lever (8) and movable rod (9) extend to described vacuum tank outside from described pair of electrodes, it is characterized in that:
Electromagnetism repels coil (17) and short-circuited conducting sleeve (16) is used for producing betwixt electromagnetic force, described movable rod (9) is actuated to open circuit along the direction of separating from described fixed electrode, the short-circuited conducting sleeve that described electromagnetism repulsion coil links to each other with described movable rod is placed near the described pair of electrodes, around the described vacuum tank outside, described electromagnetism repels coil and links to each other with DC power supply (21), wherein capacitor (26) and switch (25) are arranged between described DC power supply and the described electromagnetism repulsion coil, have only when undesired electric current flows through described movable rod, described switch closure allows the discharging current of described capacitor flow through described electromagnetism repulsion coil.
Fig. 1 illustrates the sectional view of one embodiment of the present of invention vacuum circuit-breaker;
Fig. 2 is used for the short-circuited conducting sleeve of vacuum circuit-breaker and the oblique face figure that electromagnetism repels coil among Fig. 1.
Fig. 3 is the characteristic curve of each magnetic flux that produces in Fig. 1 vacuum circuit-breaker.
One embodiment of the present of invention are narrated with reference to Fig. 1-3.
A vacuum circuit-breaker comprises a framework 2 and a vacuum tank 3 that is contained on the moveable carriage 1.Vacuum tank 3 inside are formed by two end faces of an insulating cylinder 4 of end plate 5 gas-tight sealings.In vacuum tank, pair of stationary electrodes 6 and movable electrode 7 are put them toward each other.Be loaded on fixed lever 8 of fixed electrode 6 and movable electrode 7 back and the outside that movable rod 9 extends to vacuum tank respectively.The front end of fixed lever 8 electrically is connected with main circuit conductor 10, and the mid point of movable rod electrically is connected with main circuit conductor 11.Each main circuit conductor 10 and an end of 11 electrically are connected with breaking part in the enclosed switch board (not shown) and disconnect.Each main circuit conductor 10 and 11 the other end are crooked.Each sweep is supported by porcelain insulator 12 by framework 2.
In framework, be provided with a known switch-on operating mechanism part (not shown), be used for movable electrode 7 relative fixed electrodes 6 closures.The combined floodgate bar of switch-on operating mechanism part is connected with movable rod 9 by insulation coupling part 13.Bellows 14 is contained between movable rod 9 and the end plate 5 and can makes the X of movable rod 9 in the arrow indication
1And X
2Move on the direction.Arrow X
1And X
2 Direction indicator electrode 6 and 7 be switched on and disconnect.In the outside of vacuum tank 3, short-circuited conducting sleeve 16 and electromagnetism repel coil 17 corresponding to electrode 6 and 7 and be provided with as shown in Figure 2.
Short-circuited conducting sleeve 16 is cut next circular rings from copper coin and is formed.An end that is fixed on each insulating connecting component 18 of short-circuited conducting sleeve 16 back is connected on the movable rod 9.Electromagnetism repulsion coil 17 corresponding to short-circuited conducting sleeve 16 is formed by annular conductive coil.Electromagnetism repels coil 17 to be supported by framework 2 by a support fitting 19.Insulating element 20 inserts electromagnetism to be repelled between coil 17 and the support fitting 19, and electromagnetism repulsion coil 17 links to each other with power unit 21.
An AC power part 210 is linked on transformer 22 primary coils 220.The secondary coil 221 of transformer 22 has a plurality of taps 222, and change over switch 23 switches to one of tap 222 and comes closed current path.An end and electromagnetism that diode 24 and switch 25 are connected in transformer secondary output coil 221 repel between the end of coil 17.Capacitor 26 repels at the tie point of diode 24 and switch 25 and change over switch 23 and electromagnetism between the tie point of the other end of coil 17 that to repel coil 17 in parallel with electromagnetism.Switch 25 is controlled by the current transformer on the main circuit conductor 10.If short circuit current is measured, switch 25 is by this tested circuit closed.When not measuring short circuit current, switch 25 is in open mode.
An alternating current that is provided by AC power 210 is by diode 24 rectifications.Capacitor 26 is charged by the direct current that produces.Measured switch 25 closures in this state by the current transformer (not shown) if flow through the short circuit current of main circuit conductor 10.At this moment, the discharging current from capacitor 26 flows through electromagnetism repulsion coil 17.Electromagnetism repels coil 17 and produces magnetic flux φ c, shown in Fig. 2 and 3.Magnetic flux φ c passes 16, one inductions of short-circuited conducting sleeve Eddy electric current I and flows through short-circuited conducting sleeve 16, and the generation magnetic flux φ s opposite with magnetic flux φ c direction, and magnetic flux φ c and φ s conflict mutually.This moment, short-circuited conducting sleeve 16 was along arrow X under the effect of electromagnetic repulsive force
2Direction moves.Such two electrode separation produce electric arc.Magnetic flux φ c and φ s are as the parallel magnetic field of electric arc.Because magnetic flux φ s moves along the direction that electric arc is separated, magnetic flux φ c is mainly as the magnetic field that is parallel to electric arc.Even at full speed separate with fixed electrode 6 owing to adopt electromagnetism to repel coil 17 movable electrodes 7, then electric arc is surrounded by parallel magnetic field.Thereby electric arc can not move on to the place beyond the electrode, causes having improved the blocking performance.Repel coil and strengthen parallel magnetic field owing to be provided with short-circuited conducting sleeve and electromagnetism corresponding to the place of electrode beyond the vacuum tank, therefore interdict the improvement that performance obtains giving prominence to.Because provide this parallel magnetic field to electric arc, the blocking performance can further strengthen.
In the present embodiment, produced parallel magnetic field, produced parallel magnetic field, caused little physical dimension so needn't establish coil more in addition because adopted electromagnetism to repel coil 17.
If select any one tap 222 to regulate the increase of magnetic flux φ s or reduce with switch 23, flowing through the direct current that electromagnetism repels coil 17 can increase in equipment of the present invention or reduce.So according to rupturing capacity, magnetic flux can be regulated.When use has a plurality of vacuum circuit-breaker of same capability, can select identical tap for use.
Owing to adopted capacitor 26 in the present embodiment, the magnetic flux φ s that acts between two electrodes can decay as time goes by, therefore, the electric arc passage of t in time and decay gradually, thus the breaking current value can be decided very for a short time.
And vacuum circuit-breaker of the present invention can be used for dc circuit breaker and enclosed switch board.
As previously mentioned, in vacuum circuit-breaker of the present invention, even electrode repels coil with high-speed separation by electromagnetism, electric arc can not move on to the place beyond the electrode yet, its result, and the blocking performance improves.
Claims (5)
1, a kind of vacuum circuit-breaker comprises:
At least one pair of fixed electrode (6) and movable electrode (7) are arranged in the vacuum tank (3);
A fixed lever (8) and movable rod (9) extend to described vacuum tank outside from described pair of electrodes, it is characterized in that:
Electromagnetism repels coil (17) and short-circuited conducting sleeve (16) is used for producing betwixt electromagnetic force, described movable rod (9) is actuated to open circuit along the direction of separating from described fixed electrode, the short-circuited conducting sleeve (16) that described electromagnetism repulsion coil (17) links to each other with described movable rod (9) is placed near the described pair of electrodes, around described vacuum tank (3) outside, described electromagnetism repels coil and links to each other with DC power supply (21), wherein capacitor (26) and switch (25) are arranged between described DC power supply and the described electromagnetism repulsion coil, have only when undesired electric current flows through described movable rod, described switch closure allows the discharging current of described capacitor flow through described electromagnetism repulsion coil.
2,, it is characterized in that described electromagnetism repels coil and supported by framework (2) by insulating element (12) according to the vacuum circuit-breaker of claim 1.
3, according to the vacuum circuit-breaker of claim 1, it is characterized by: described vacuum circuit-breaker can be used for enclosed switch board.
4, according to the vacuum circuit-breaker of claim 1, it is characterized by: vacuum circuit-breaker can be used for dc circuit breaker.
5, according to the vacuum circuit-breaker of claim 1, it is characterized by: rectifier (24) and switch (23) are connected respectively to an end and the other end that described electromagnetism repels coil, and described rectifier and described switch are linked respectively in the tap of the end of secondary coil of transformer (22) and transformer secondary output coil.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP78036/88 | 1988-04-01 | ||
| JP63078036A JPH0685291B2 (en) | 1988-04-01 | 1988-04-01 | Vacuum circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1037232A CN1037232A (en) | 1989-11-15 |
| CN1018870B true CN1018870B (en) | 1992-10-28 |
Family
ID=13650594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89101904A Expired CN1018870B (en) | 1988-04-01 | 1989-04-01 | Vacuum circuit breaker |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH0685291B2 (en) |
| KR (1) | KR890016603A (en) |
| CN (1) | CN1018870B (en) |
| DE (1) | DE3910010A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3356457B2 (en) * | 1992-04-02 | 2002-12-16 | 株式会社日立製作所 | Vacuum circuit breaker |
| JP3816284B2 (en) | 1998-12-28 | 2006-08-30 | 三菱電機株式会社 | Switchgear |
| JP3930208B2 (en) * | 1999-10-07 | 2007-06-13 | 株式会社日立製作所 | Vacuum insulated switchgear |
| JP2002124158A (en) | 2000-10-16 | 2002-04-26 | Mitsubishi Electric Corp | Switch device |
| JP2002124162A (en) | 2000-10-16 | 2002-04-26 | Mitsubishi Electric Corp | Switchgear |
| JP2002124159A (en) | 2000-10-16 | 2002-04-26 | Mitsubishi Electric Corp | Switch device |
| JP4934065B2 (en) * | 2008-01-23 | 2012-05-16 | 三菱電機株式会社 | Electromagnetic switchgear |
| US9048039B2 (en) | 2012-05-08 | 2015-06-02 | Ge Energy Power Conversion Technology Limited | Vacuum switch assemblies |
| EP2662878A1 (en) * | 2012-05-08 | 2013-11-13 | GE Energy Power Conversion Technology Limited | Vacuum switch assemblies |
| KR101569195B1 (en) * | 2013-12-26 | 2015-11-13 | 주식회사 효성 | DC circuit breaker using magnetic field |
| CN106876189A (en) * | 2017-04-24 | 2017-06-20 | 南京南瑞继保电气有限公司 | A kind of energy storage of electromagnetic repulsion force operating mechanism and trigger circuit and control method |
| CN113161192B (en) * | 2021-04-22 | 2023-01-20 | 云南电网有限责任公司电力科学研究院 | Magnetic field enhanced vacuum circuit breaker |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59224022A (en) * | 1983-06-03 | 1984-12-15 | 三菱電機株式会社 | Breaker |
| JPH0534064U (en) * | 1991-10-16 | 1993-05-07 | 日産自動車株式会社 | Passive seat belt device |
-
1988
- 1988-04-01 JP JP63078036A patent/JPH0685291B2/en not_active Expired - Fee Related
-
1989
- 1989-03-27 KR KR1019890003831A patent/KR890016603A/en not_active IP Right Cessation
- 1989-03-28 DE DE3910010A patent/DE3910010A1/en active Granted
- 1989-04-01 CN CN89101904A patent/CN1018870B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3910010C2 (en) | 1991-01-17 |
| DE3910010A1 (en) | 1989-10-19 |
| CN1037232A (en) | 1989-11-15 |
| JPH01253135A (en) | 1989-10-09 |
| KR890016603A (en) | 1989-11-29 |
| JPH0685291B2 (en) | 1994-10-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| 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 |