CN108400073B - A kind of current-limiting type air type dc circuit breaker based on narrow slit arcing - Google Patents
A kind of current-limiting type air type dc circuit breaker based on narrow slit arcing Download PDFInfo
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- CN108400073B CN108400073B CN201810164339.3A CN201810164339A CN108400073B CN 108400073 B CN108400073 B CN 108400073B CN 201810164339 A CN201810164339 A CN 201810164339A CN 108400073 B CN108400073 B CN 108400073B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/42—Induction-motor, induced-current, or electrodynamic release mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/68—Power reset mechanisms actuated by electromagnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a kind of current-limiting type air type dc circuit breaker based on narrow slit arcing comprising conductive contact system, arc-chutes, rapid repulsion mechanism and ramp type insulate pumping board；When there is short trouble, rapid repulsion mechanism drives ramp type insulation pumping board to be moved, and realizes the separating brake of conductive contact system, and the direct-current arc of generation is promoted in narrow slit structure, quickly fully squeezes, elongates, cooling electric arc；And it utilizes symmetrical connecting rod structure of contact terminal, improves opening velocity, and limit spring is used to provide sufficient retentivity for contact, improves the tolerance in short-term of breaker；In addition, it uses repulsion metal dish as insulation pumping board and touches cephalomotor driving element, hence it is evident that improve breaker actuation speed, greatly shortening switch off time；Especially suitable for requiring fast and reliable to cut-off low-voltage high-capacity DC current occasion.
Description
Technical field
The invention belongs to dc circuit breaker field, in particular to a kind of current-limiting type air type direct current based on narrow slit arcing is disconnected
Road device.
Background technique
In recent years, direct current power system is with its unique advantage in fields such as rail traffic, naval vessel power supply, generations of electricity by new energy
Quick application and development are obtained.
Dc circuit breaker has the function of cutting system fault current, the protection and control important as direct current power system
Equipment has obtained more and more attention.Different from AC system, DC current does not have natural zero-crossing point.In breaking direct current
In the process, if the voltage of direct-current arc be higher than system voltage, system power will arc voltage force under be gradually reduced
Zero passage.This cutoff method is known as current-limiting type and cut-offs, and air usually can be used as arc-extinguishing medium, that is, realizes air type current limliting
It cut-offs.
Air type current limliting cut-offs technology, straight in mesolow since principle is simple, reliable operation, control difficulty are small, at low cost
It is widely applied in streaming system.Its key point is that highland promotes arc voltage as far as possible, it is however generally that, in order to reach this
A purpose needs to apply arc blow-out magnetic field and arc extinguishing grid pieces in breaker.And electric arc is introduced into arc extinguishing grid pieces using magnetic field, it mentions
Proximal pole pressure drop, cooling electric arc are risen, this itself increases the structure complexity and electric arc regulation difficulty of circuit breaker design.
Conventionally, as direct-current arc energy is big, how as early as possible, reliably pilot arc enters arc extinguishing grid pieces,
And cooling electric arc, raising arc voltage, avoid the serious ablation of long-time arcing bring contact and the too low bring of arc voltage from slowly cut-offfing
Or failure of interruption, it is a big difficulty that air type direct current cut-offs technology.In addition, how to design contact system has centainly in short-term
Tolerance can bear larger breaking current and not opened by reprimand, this is also that air type direct current cut-offs one of technological difficulties of technology.
Summary of the invention
In order to solve the technological difficulties of above-mentioned electric arc regulation, the invention proposes a kind of, and the current-limiting type based on narrow slit arcing is empty
Gas formula dc circuit breaker, has greatly simplified the composed structure of regular air formula dc circuit breaker, does not need arc extinguishing grid pieces and blows
Arc magnetic field, the reliable and effective cooling electric arc of energy quickly improve arc voltage, fundamentally solve the difficulties of electric arc regulation.
Preferably, be also provided with can symmetric motion contact system, both can high speed repulsive force mechanism effect under quickly divide
Lock, and combined floodgate stability can be kept under sufficient retentivity effect, effectively increase the tolerance in short-term of breaker.
Its specific technical solution is as follows:
A kind of current-limiting type air type dc circuit breaker based on narrow slit arcing, the breaker include conductive contact system, go out
Arc chamber, rapid repulsion mechanism and ramp type insulation pumping board；
Wherein, the conductive contact system is fixed on the bottom of the arc-chutes comprising two electricity being horizontally movable
Pole constitutes conductive contact by contacting with each other for electrode；
Whether the rapid repulsion mechanism there is short trouble based on circuit where the breaker, to control the slope
Formula insulation pumping board is moved upwardly or downwardly；
The ramp type insulation pumping board, is fixed on the top of the rapid repulsion mechanism, is moved up and down in institute
It states in arc-chutes and carries out；
When short trouble occurs in the circuit where breaker, which insulate pumping board under the control of rapid repulsion mechanism
It moves upwards, making two electrodes in the conductive contact system by slope effect, stress carries out separating brake fortune in the horizontal direction
Dynamic, then, the gap that insulation pumping board passes through two electrodes continues up and cooperatively forms air narrow slit with arc-chutes, will divide
The direct-current arc that lock generates, which is squeezed into the narrow slit, to be stretched, is cooled down；When circuit restores to work normally where breaker,
The ramp type insulation pumping board moves downward under the control of rapid repulsion mechanism, and described two electrodes carry out combined floodgate movement, phase
Mutually contact constitutes galvanic circle.
Preferably, the conductive contact system includes two groups of symmetrically arranged bridge type copper electrodes, electrode tie rods, electrode pin
Nail, electrode tip holder, electrode movement room and electrode limit spring；
Wherein, the bridge type copper electrode is placed in inside hollow cubic electrode tip holder, can the horizontal movement in the electrode tip holder plane；
The bridge type copper electrode also has the cylindrical pin of protrusion, which closely pastes with ramp type insulation pumping board
It closes；The outer end of described two electrodes has the electrode tie rod, which is in electrode movement room, extended electrode
Gymnasium is connected with to disjunction circuit, and constitutes galvanic circle by two electrodes；The electrode limit spring pocket connects in electrode
Between connecting rod and the wall surface of electrode movement room, the promotion that limiting buffer and electrode when the movement of electrode separating brake close a floodgate when moving is realized
And it keeps.
Preferably, the rapid repulsion mechanism includes opening coil, closing coil, repulsion metal dish and repulsion push rod；
Wherein, the repulsion metal dish is nested between opening coil and closing coil by insulating sleeve；The repulsion
Push rod is fixedly connected by screw thread with repulsion metal dish；Ramp type insulation pumping board bottom is fixed on repulsion push rod top；
Specifically, the opening coil and closing coil can pass through turn on thyristors in control external capacitive discharge loop
Short-time pulse electric current is flowed through, the transient magnetic field which generates can induce vortex in repulsion dish, and then pass through vortex
And magnetic fields generate electromagnetic repulsion force between hot-wire coil and repulsion metal dish；The repulsion metal dish can opening coil,
The effect of closing coil repulsion is lower to drive repulsion push rod and the ramp type on push rod top insulation pumping board to be moved upwardly or downwardly.
Preferably, the two sides of repulsion push rod bottom install bistable spring additional in rapid repulsion mechanism, adjusts outer screw and change
Become resistance when two sides telescopic spring amount control repulsion pushrod movement, and then control divide-shut brake speed, the resistance of two lateral springs is logical
Flange is crossed to be applied on repulsion push rod.
Preferably, motion buffer is installed additional at the top of repulsion push rod by beam structure, when push rod is moved upwards to it
Buffer deceleration is carried out until movement stops.
Preferably, the arc-chutes and ramp type insulation pumping board are all made of the insulating materials of resistance to ablation and are process.
Preferably, the arc-chutes are I-shaped.
Preferably, I-shaped arc-chutes knot nested with the ramp type insulation pumping board close narrow slit type of composition
Structure.
The present invention compared to existing technologies, can get following advantageous effects:
1. dc circuit breaker of the invention is made of Purely mechanical component, regular air formula dc circuit breaker has greatly been simplified
Composed structure；It is based on narrow slit arcing technology, it is not necessary that arc extinguishing grid pieces and arc blow-out system are arranged in arc-chutes, can reliably have
The cooling electric arc of effect quickly improves arc voltage, blow-out time most cripetura as low as 4ms；Whole device structure is simple, stability is high, opens
Cutting capacity is strong；
2. the electrode tie rod limit spring assembled in contact system of the present invention both can in separating brake from limit and movement it is slow
Punching effect, and closing retention force can be provided to electrode when closing a floodgate, resist electromagnetic repulsion force, improve the tolerance in short-term of breaker
Ability；
3. dc circuit breaker of the invention uses repulsion metal dish as insulation pumping board and touches cephalomotor driving element.By
In repulsive force mechanism motion start is fast, speed is high, thrust is big, which can be pushed into narrow slit for electric arc in very short time after separating brake
Middle elongation, cooling substantially reduce the switch off time of breaker.
Detailed description of the invention
Fig. 1 is the overall structure signal of the current-limiting type air type dc circuit breaker in the embodiment of the present invention based on narrow slit arcing
Figure；
Fig. 2 is that the top of narrow slit arc-chutes and conductive contact system is illustrated under "on" position in the above embodiment of the present invention
Figure；
Fig. 3 is that the top of narrow slit arc-chutes and conductive contact system is illustrated under gate-dividing state in the above embodiment of the present invention
Figure；
Fig. 4 is the schematic diagram of rapid repulsion mechanism described in the specific embodiment of the invention and external drive module；
Fig. 5 be experiment measure when cut-off 2KA short circuit current based on the dc circuit breaker in the embodiment of the present invention
Waveform diagram；
Wherein, 1 is arc-chutes；2 be bridge type copper electrode；3 be electrode tip holder；4 be electrode tie rod；5 be electrode limit spring；6
For electrode movement room；7 be electrode pin；8 be insulation pumping board；9 be repulsion push rod；10 be closing coil；11 be metal dish；12 are
Opening coil；13 be arc extinguishing narrow slit.
Specific embodiment
The present invention is further explained and is illustrated with reference to the accompanying drawing.
Referring to Fig.1, the present invention provides a kind of current-limiting type air type dc circuit breaker based on narrow slit arcing, the breaker
Including conductive contact system, arc-chutes 1, rapid repulsion mechanism and ramp type insulation pumping board 8.
Wherein, the conductive contact system is fixed on the bottom of the arc-chutes 1 comprising two electricity being horizontally movable
Pole 2 constitutes conductive contact by contacting with each other for electrode 2；The rapid repulsion mechanism, whether circuit where being based on the breaker
There is short trouble, to control being moved upwardly or downwardly for the ramp type insulation pumping board 8；The ramp type insulation pumping board 8, Gu
It is scheduled on the top of the rapid repulsion mechanism, moves carried out in the narrow slit arc-chutes 1 up and down.
In specific works, when short trouble occurs in the circuit where breaker, ramp type insulation pumping board 8 is quickly being denounceed
It is moved upwards under the control of force mechanisms, two electrodes 2 in the conductive contact system is made in the horizontal direction by slope effect
Upper stress carries out separating brake movement, and then, the gap that insulation pumping board passes through two electrodes continues up and cooperates with arc-chutes 1
Air narrow slit 13 is formed, the direct-current arc that separating brake generates is squeezed into the narrow slit 13 and stretched, cooled down；When breaker institute
When circuit restores to work normally, the ramp type insulation pumping board 8 moves downward under the control of rapid repulsion mechanism, and described two
A electrode 2 carries out combined floodgate movement, contacts with each other and constitutes galvanic circle.
As it can be seen that heretofore described breaker is quick by rapid repulsion mechanism, ramp type insulation pumping board 8 and arc-chutes 1
It elongates and cooling electric arc, has fast and stable and cut-off and holding capacity of reliably closing a floodgate.
Preferably, the arc-chutes 1 are I-shaped, the I-shaped arc-chutes and ramp type insulation pumping board structure
At close narrow slit type nested structure, to preferably carry out the stretching of electric arc.
In addition, preferably, the arc-chutes 1 and ramp type insulation pumping board 8 are all made of the insulating materials of resistance to ablation and are process,
Enhance its tolerance.
In a specific embodiment, the conductive contact system is by bridge type copper electrode 2, electrode tip holder 3, electrode tie rod 4, electricity
Pole limit spring 5, electrode movement room 6 are constituted；Whole device is connected in circuit by copper electrode 2, electrode tie rod 4, contact system
Other component of uniting guarantees the suitable exercise of electrode switching on and off.
Specifically, the bridge type copper electrode 2 is placed in inside hollow cubic electrode tip holder 3, it can be horizontal in 3 plane of electrode tip holder
Movement；Cylindrical pin 7 of the bridge type copper electrode 2 also with protrusion, the cylindrical pin 7 and ramp type insulation pumping board
8 fit closely；The outer end of described two electrodes 2 has the electrode tie rod 4, which is in electrode movement room 6
In, extended electrode movement room 6 is connected with to disjunction circuit, and constitutes galvanic circle by two electrodes 2；The electrode limit
Spring 5 is socketed between electrode tie rod 4 and the wall surface of electrode movement room 6, realizes limiting buffer and electricity when the movement of 2 separating brake of electrode
The promotion and holding that pole 2 is closed a floodgate when moving.
Referring to Fig. 2 and Fig. 3, when breaker closing, which constitutes galvanic circle, breaks at this time
Road device is specified through-flow, and entire circuit is in normal operating conditions, and ramp type insulation pumping board 8 is in arc-chutes 1 under electrode 2
Portion, electrode pin 7 are bonded just with the slope of insulation pumping board 8 and do not stress, and two symmetrical bridge type copper electrodes 2 fit closely, place
In the center of arc-chutes 1, electric current is flowed therethrough.
Since two bridge type copper electrodes 2 only constitute contact loop, electricity by some tiny contact (area) patterns on the contact surface
Streamline can be shunk at contact surface, and then generate electromagnetic repulsion force between two electrodes, be passed through especially bright when short circuit current
It is aobvious.And dc circuit breaker of the invention can pass through the limit spring between 4 end of locular wall and electrode tie rod of electrode movement room 6
5 precompressions provided guarantee electrode seal fitting and are not opened by reprimand as closing retention force.
In a specific embodiment, specific design has been carried out to the rapid repulsion device.The rapid repulsion mechanism packet
Include repulsion push rod 9, closing coil 10, repulsion metal dish 11 and opening coil 12.
Specifically, the repulsion metal dish 11 is nested between opening coil 12 and closing coil 10 by insulating sleeve；
The repulsion push rod 9 is fixedly connected by screw thread with repulsion metal dish 11；The ramp type insulation 8 bottom of pumping board is fixed on repulsion
9 top of push rod.
The breaker is when being worked, when its external circuits is in short trouble and troubleshooting stage, specific work
It is as follows to make process:
When short trouble occurs, separating brake controller detects short circuit current signal, and generates opening coil thyristor
Trigger signal, to trigger thyristor VT1 conducting；After thyristor VT1 conducting, the capacitor C1 of energy storage will be rapidly to separating brake
Coil 12 discharges, and generates a pulse current；Based on electromagnetic induction eddy current principle, metal repulsion dish 11 and fixed opening coil
Huge electromagnetic repulsion force F1 will be generated between 12 to push repulsion push rod 9 and insulation 8 fast upward motion of pumping board；In this process
In, the electrode pin 7 being tightly attached on insulation 8 slope of pumping board will make horizontal separation movement along the slope moved upwards, until quilt
Push the two sides of the vertical edge of insulation pumping board 8 open；Correspondingly, also horizontal direction two sides move two lateral electrodes under the effect of pin 7,
Complete separating brake movement；Hereafter, the gap that insulation pumping board 8 passes through electrode 2 continues up and cooperatively forms sky with arc-chutes 1
Gas narrow slit 13；As the unique path of electric arc, the electric arc on the electrode of the left and right sides will be forced into two sides air narrow slit 13, and
It is connected and is connected at the top of narrow slit 13；Extruding, the elongation of narrow slit 13 can change arc shape, and arc voltage is greatly improved,
The time of 10ms or so, which resists system voltage and successfully completes, cut-offs, and cut-offs waveform referring to Fig. 5；
After short trouble excision, closing operation is carried out to route, referring to Fig. 4, switching-on controller detects that failure is cut
After signal, the trigger signal of closing coil thyristor VT2 is generated, to trigger thyristor VT2 conducting.Thyristor VT2 is led
After logical, the capacitor C2 of energy storage will discharge to closing coil 10 rapidly, generate a pulse current；Based on electromagnetic induction whirlpool
Principle is flowed, huge electromagnetic repulsion force F2 will be generated between metal repulsion dish 11 and fixed closing coil 10 to pull repulsion push rod
9 and insulation 8 sharp downward movement of pumping board.Bridge-type copper electrode 2 has moved inwardly by horizontal under the effect of the elastic force of limit spring 5
At feed motion, restore to state shown in Fig. 2.
In a further embodiment, in order to control the speed of divide-shut brake, can in rapid repulsion mechanism repulsion push rod bottom
The two sides in portion install bistable spring additional, adjust resistance when outer screw changes two sides telescopic spring amount control repulsion pushrod movement,
And then divide-shut brake speed is controlled, the resistance of two lateral springs is applied on repulsion push rod by flange.Or/also, pass through crossbeam
Structure installs motion buffer additional at the top of repulsion push rod, carries out buffer deceleration to it when push rod is moved upwards until movement stops
Only.To ensure that stablizing for divide-shut brake carries out.
To sum up, the invention discloses a kind of current-limiting type air type dc circuit breaker based on narrow slit arcing comprising
Conductive contact system, arc-chutes 1, rapid repulsion mechanism and ramp type insulation pumping board 8；When there is short trouble, rapid repulsion
Mechanism drives ramp type insulation pumping board 8 to be moved, and realizes the separating brake of conductive contact system, and the direct-current arc of generation is promoted
It in narrow slit structure 13, quickly fully squeezes, elongate, cooling electric arc；And it utilizes symmetrical connecting rod structure of contact terminal, improves separating brake
Speed, and limit spring 5 is used to provide sufficient retentivity for contact, improve the tolerance in short-term of breaker；In addition, its
Repulsion metal dish 11 is used as insulation pumping board 8 and touches cephalomotor driving element, hence it is evident that improves breaker actuation speed, greatly
Shorten switch off time；Especially suitable for requiring fast and reliable to cut-off low-voltage high-capacity DC current occasion.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by the limit of above-described embodiment
System, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention should all
For equivalent substitute mode, it is included within the scope of the present invention.
Claims (8)
1. a kind of current-limiting type air type dc circuit breaker based on narrow slit arcing, it is characterised in that:
The breaker includes conductive contact system, arc-chutes, rapid repulsion mechanism and ramp type insulation pumping board；
Wherein, the conductive contact system is fixed on the bottom of the arc-chutes comprising two electrodes being horizontally movable lead to
It crosses contacting with each other for electrode and constitutes conductive contact；
Whether the rapid repulsion mechanism there is short trouble based on circuit where the breaker, exhausted to control the ramp type
Edge pumping board is moved upwardly or downwardly；
The ramp type insulation pumping board, is fixed on the top of the rapid repulsion mechanism, moves up and down described
It is carried out in arc-chutes；
When short trouble occurs in the circuit where breaker, ramp type insulation pumping board is upward under the control of rapid repulsion mechanism
Movement, making two electrodes in the conductive contact system by slope effect, stress carries out separating brake movement in the horizontal direction,
Then, the gap that insulation pumping board passes through two electrodes continues up and cooperatively forms air narrow slit with arc-chutes, by separating brake
The direct-current arc of generation, which is squeezed into the narrow slit, to be stretched, is cooled down；When circuit restores to work normally where breaker, institute
It states ramp type insulation pumping board to move downward under the control of rapid repulsion mechanism, described two electrodes carry out combined floodgate movement, mutually
Contact constitutes galvanic circle.
2. dc circuit breaker according to claim 1, it is characterised in that:
The conductive contact system includes two groups of symmetrically arranged bridge type copper electrodes, electrode tie rod, electrode pin, electrode tip holders, electricity
Polar motion room and electrode limit spring；
Wherein, the bridge type copper electrode is placed in inside hollow cubic electrode tip holder, can the horizontal movement in the electrode tip holder plane；It is described
Bridge type copper electrode also has the cylindrical pin of protrusion, which fits closely with ramp type insulation pumping board；Institute
The outer end of two electrodes is stated with the electrode tie rod, which is in electrode movement room, extended electrode movement
Room is connected with to disjunction circuit, and constitutes galvanic circle by two electrodes；The electrode limit spring pocket connects in electrode tie rod
Between the wall surface of electrode movement room, promotion and guarantor that limiting buffer and electrode when the movement of electrode separating brake close a floodgate when moving are realized
It holds.
3. dc circuit breaker according to claim 1, it is characterised in that:
The rapid repulsion mechanism includes opening coil, closing coil, repulsion metal dish and repulsion push rod；
Wherein, the repulsion metal dish is nested between opening coil and closing coil by insulating sleeve；The repulsion push rod
It is fixedly connected by screw thread with repulsion metal dish；Ramp type insulation pumping board bottom is fixed on repulsion push rod top；
The opening coil and closing coil can flow through arteries and veins in short-term by turn on thyristors in control external capacitive discharge loop
Electric current is rushed, the transient magnetic field which generates can induce vortex in repulsion dish, and then pass through vortex and magnetic fields
Between the opening coil and repulsion metal dish of energization, alternatively, generating electromagnetism between the closing coil and repulsion metal dish that are powered
Repulsion；The repulsion metal dish can drive the oblique of repulsion push rod and push rod top under opening coil, the effect of closing coil repulsion
Formula insulation pumping board in slope is moved upwardly or downwardly.
4. dc circuit breaker according to claim 3, which is characterized in that the repulsion push rod bottom in rapid repulsion mechanism
Two sides install bistable spring additional, adjust resistance when outer screw changes two sides telescopic spring amount control repulsion pushrod movement, in turn
Divide-shut brake speed is controlled, the resistance of two lateral springs is applied on repulsion push rod by flange.
5. dc circuit breaker according to claim 3, which is characterized in that installed additional at the top of repulsion push rod by beam structure
Motion buffer carries out buffer deceleration when push rod is moved upwards until movement stops to it.
6. dc circuit breaker according to claim 1, which is characterized in that the arc-chutes and ramp type insulation pumping board are adopted
It is process with the insulating materials of resistance to ablation.
7. dc circuit breaker according to claim 1, which is characterized in that the arc-chutes are I-shaped.
8. dc circuit breaker according to claim 7, which is characterized in that the I-shaped arc-chutes can be with the slope
Formula insulation pumping board constitutes close narrow slit type nested structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810164339.3A CN108400073B (en) | 2018-02-26 | 2018-02-26 | A kind of current-limiting type air type dc circuit breaker based on narrow slit arcing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810164339.3A CN108400073B (en) | 2018-02-26 | 2018-02-26 | A kind of current-limiting type air type dc circuit breaker based on narrow slit arcing |
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| CN108400073B true CN108400073B (en) | 2019-10-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2269181A1 (en) * | 1974-04-29 | 1975-11-21 | Fataccy Victor | Combustion engine spark-plug cut-out - has plunger to separate tags and to interrupt or earth circuit |
| FR2338561A1 (en) * | 1976-01-15 | 1977-08-12 | Larebeyrette Jean De | Manual, pneumatic or electromagnetically operated switch - has insulating material wedge to separate contacts and provide mechanical |
| DE19817444C1 (en) * | 1998-04-20 | 1999-09-16 | Driescher Spezialfab Fritz | MV load breaker switch for MV switchgear |
| CN103943406B (en) * | 2014-04-15 | 2015-12-02 | 西安交通大学 | A kind of Multiple level vacuum interrupter |
| CN104022000B (en) * | 2014-05-27 | 2017-04-05 | 通能顺达科技国际有限公司 | A kind of fast reaction departs from breaker and the fast reaction of breaker departs from method |
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