CN114582684A - Current-limiting circuit breaker high-speed contact driving mechanism based on electromagnetic force - Google Patents
Current-limiting circuit breaker high-speed contact driving mechanism based on electromagnetic force Download PDFInfo
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- CN114582684A CN114582684A CN202210244850.0A CN202210244850A CN114582684A CN 114582684 A CN114582684 A CN 114582684A CN 202210244850 A CN202210244850 A CN 202210244850A CN 114582684 A CN114582684 A CN 114582684A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 65
- 230000001681 protective effect Effects 0.000 claims abstract description 9
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- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 6
- 230000003139 buffering effect Effects 0.000 claims description 5
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- 229910001338 liquidmetal Inorganic materials 0.000 description 2
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- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
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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
- H01H71/24—Electromagnetic mechanisms
- H01H71/32—Electromagnetic mechanisms having permanently magnetised part
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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
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/025—Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts
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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
- H01H71/04—Means for indicating condition of the switching device
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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
- H01H71/24—Electromagnetic mechanisms
- H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Abstract
The invention discloses a current-limiting circuit breaker high-speed contact driving mechanism based on electromagnetic force; the power supply system comprises a control module, wherein a PWM module is electrically connected to the control module, a driving module is electrically connected to the PWM module, an electromagnetic module is electrically connected to the driving module, a relay module is electrically connected to the power supply module, and the relay module is electrically connected to the electromagnetic module; the device also comprises an electromagnetic mechanism and an elastic mechanism; the electromagnetic mechanism comprises a protective shell, and a first electromagnet, a permanent magnet and a second electromagnet are arranged in the protective shell; the elastic mechanism comprises an elastic shell, a moving plate and an electromagnetic repulsion mechanism, wherein a telescopic rod is arranged on the moving plate and penetrates through the elastic shell, and a first spring is sleeved on the telescopic rod; the invention can realize stable control and adjustment, realize electromagnetic force control and adjustment and facilitate buffer adjustment.
Description
Technical Field
The invention belongs to the technical field of current-limiting circuit breakers, and particularly relates to a high-speed contact driving mechanism of a current-limiting circuit breaker based on electromagnetic force.
Background
The current-limiting type circuit breaker is a novel current-limiting and switching-on and switching-off technology which organically combines a plurality of technologies such as a high-speed mechanical switch, a solid-state switch, a fast fuse, a superconducting current limiter, a liquid metal current limiter and the like, generally has the advantages of the technologies, overcomes the defects when the technologies are applied independently, and has a wide application prospect. The working principle and the development status of a hybrid current-limiting circuit breaker, a hybrid current-limiting fuse, a hybrid superconducting current limiter and a hybrid liquid metal current limiter are introduced in detail, the same topological schemes are contrasted and analyzed, the respective advantages and disadvantages of various hybrid current-limiting and switching-on and switching-off technologies are summarized, the content and the development direction of further research of the future hybrid current-limiting and switching-on and switching-off technologies are summarized, and various problems still exist in various high-speed contact driving mechanisms of the current-limiting circuit breakers of electromagnetic force in the market.
Although the current-limiting circuit breaker high-speed contact driving mechanism disclosed in the publication No. CN102262982A has the advantages of strong current-limiting capability, rapid action, and reliable turn-off, it does not solve the problems of the existing circuit breaker that the control and adjustment cannot be effectively performed, the driving and adjustment of the electromagnetic module cannot be performed, and the safety protection of the circuit breaker cannot be performed, and therefore we propose a current-limiting circuit breaker high-speed contact driving mechanism based on electromagnetic force.
Disclosure of Invention
The present invention is directed to a high-speed contact driving mechanism of a current-limiting circuit breaker based on electromagnetic force, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a high-speed contact driving mechanism of a current-limiting circuit breaker based on electromagnetic force comprises a control module, wherein the control module is electrically connected with a voltage regulating module, the voltage regulating module is electrically connected with a power supply module, the power supply module is electrically connected with a current detection module, the current detection module is electrically connected with an on-off switch module, the current detection module is electrically connected with an analog-to-digital conversion module, the analog-to-digital conversion module is electrically connected with the control module, the control module is electrically connected with a PWM module, the PWM module is electrically connected with a driving module, the driving module is electrically connected with an electromagnetic module, the power supply module is electrically connected with a relay module which is electrically connected with the electromagnetic module, the relay module is electrically connected with an operational amplification module, and the operational amplification module is electrically connected with the driving module;
the device also comprises an electromagnetic mechanism and an elastic mechanism;
the electromagnetic mechanism comprises a protective shell, a first electromagnet, a permanent magnet and a second electromagnet are arranged in the protective shell, the permanent magnet is arranged between the first electromagnet and the second electromagnet, and a moving magnet is arranged among the first electromagnet, the permanent magnet and the second electromagnet;
the elastic mechanism comprises an elastic shell, a movable plate and an electromagnetic repulsion mechanism, a telescopic rod is arranged on the movable plate and penetrates through the elastic shell, a first spring is sleeved on the telescopic rod, and the bottom end of the first spring is fixedly connected with the movable plate.
Preferably, the control module is electrically connected with an auxiliary module, the auxiliary module comprises an alarm, a display and a control key, and the alarm adopts an audible and visual alarm.
Preferably, the auxiliary module further comprises a communication module and a storage module, the communication module is used for uploading data information, the storage module is used for storing an operation program body and an operation log, and the storage module comprises a ROM storage module and a RAM storage module.
Preferably, the voltage regulating module comprises a voltage reducing circuit, a rectifying circuit, a voltage stabilizing circuit, a filter circuit and an anti-surge circuit, the voltage reducing circuit is used for reducing the high voltage of the power supply module into low voltage, the rectifying circuit is used for converting alternating voltage into direct voltage, the voltage stabilizing circuit is used for stabilizing the voltage, the filter circuit is used for filtering the alternating voltage in the direct voltage, the anti-surge circuit is used for buffering the circuit, and electronic components in the protection circuit are not damaged.
Preferably, the PWM module is configured to modulate a duty ratio of a square wave to encode a level of a specific analog signal, and output and issue a command of the system, the analog-to-digital conversion module is configured to convert a detected current analog signal, and the operational amplifier circuit is configured to amplify a control signal, so as to prevent the control signal from being lost or being weak in signal and causing a control error.
Preferably, the electromagnetic mechanism further comprises a bottom plate, support columns are fixedly mounted at four corners of the bottom plate, a top plate and a transverse plate are fixedly mounted on the support columns, and the electromagnetic mechanism and the elastic mechanism are arranged between the top plate and the transverse plate.
The preferred, be equipped with buffer gear on the roof, buffer gear includes first carriage release lever, fixedly connected with on the first carriage release lever moves the magnet, the tip fixed connection of first carriage release lever is in on the elastic housing, the fixed second spring that is equipped with on the roof, the second spring cup joints on the first carriage release lever, the tip fixed mounting of first carriage release lever has first limiting plate, be equipped with four slide bars, four the slide bar runs through first limiting plate, the top of slide bar is all fixed and is equipped with the second limiting plate.
Preferably, a fixed block is fixedly installed on the bottom plate, a fixed contact is fixedly installed on the fixed block, and a plurality of connector lugs are arranged on the fixed block.
Preferably, a second moving rod is fixedly mounted at the bottom end of the moving plate, a movable contact is fixedly connected to the bottom end of the second moving rod, and the movable contact is in contact connection with the fixed contact.
Preferably, an electromagnetic repulsion mechanism is fixedly mounted on the transverse plate, a third limiting plate is fixedly mounted at the end of the telescopic rod, a through hole is formed in the transverse plate, and the second moving rod penetrates through the through hole.
Compared with the prior art, the invention has the beneficial effects that:
the current detection module detects current and detects current of a circuit, the control module controls and adjusts the electromagnetic module through current transformation to complete control of a system, the electromagnetic mechanism and the elastic mechanism are used for adjusting the system, the movable magnet and the movable plate are controlled and adjusted through electromagnetic force to complete power regulation and control, on-off adjustment of the circuit is achieved, and the elastic mechanism and the buffer mechanism can achieve buffer adjustment of the system to prevent collision equipment from being damaged.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic structural view of the present invention;
fig. 3 is a schematic cross-sectional structure of the present invention.
In the figure: 1. a base plate; 2. a support pillar; 3. a top plate; 4. a transverse plate; 5. an elastic mechanism; 501. an elastic housing; 502. a telescopic rod; 503. a first spring; 504. a third limiting plate; 505. an electromagnetic repulsion mechanism; 506. moving the plate; 6. an electromagnetic mechanism; 601. a protective housing; 602. a first electromagnet; 603. a permanent magnet; 604. a second electromagnet; 605. a moving magnet; 7. a buffer mechanism; 701. a first movable bar; 702. a second spring; 703. a first limit plate; 704. a slide bar; 705. a second limiting plate; 8. a fixed block; 9. a fixed contact; 10. a connector lug; 11. a second movable bar; 12. a movable contact.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a high-speed contact driving mechanism of a current-limiting circuit breaker based on electromagnetic force comprises a control module, wherein the control module is electrically connected with a voltage regulating module, the voltage regulating module is electrically connected with a power supply module, the power supply module is electrically connected with a current detection module, the current detection module is electrically connected with an on-off switch module, the current detection module is electrically connected with an analog-to-digital conversion module, the analog-to-digital conversion module is electrically connected with the control module, the control module is electrically connected with a PWM module, the PWM module is electrically connected with a driving module, the driving module is electrically connected with an electromagnetic module, the power supply module is electrically connected with a relay module which is electrically connected with the electromagnetic module, the relay module is electrically connected with an operational amplification module, and the operational amplification module is electrically connected with the driving module;
the device also comprises an electromagnetic mechanism 6 and an elastic mechanism 5;
the electromagnetic mechanism 6 comprises a protective shell 601, a first electromagnet 602, a permanent magnet 603 and a second electromagnet 604 are arranged inside the protective shell 601, the permanent magnet 603 is arranged between the first electromagnet 602 and the second electromagnet 604, and a moving magnet 605 is arranged between the first electromagnet 602, the permanent magnet 603 and the second electromagnet 604;
the elastic mechanism 5 comprises an elastic shell 501, a moving plate 506 and an electromagnetic repulsion mechanism 505, wherein an expansion link 502 is arranged on the moving plate 506, the expansion link 502 penetrates through the elastic shell 501, a first spring 503 is sleeved on the expansion link 502, and the bottom end of the first spring 503 is fixedly connected with the moving plate 506.
In order to realize the more convenient operation to the operation of system to and realize the warning, in this embodiment, it is preferred, electric connection has supplementary module on the control module, including alarm, display and control button in the supplementary module, what the alarm adopted is audible-visual annunciator.
In order to upload data information of the system and store the data information, in this embodiment, it is preferable that the auxiliary module further includes a communication module and a storage module, the communication module is configured to upload the data information, the storage module is configured to store an operation program and an operation log, and the storage module includes a ROM storage module and a RAM storage module.
In order to implement stable power supply operation of the system and maintain stable operation of the system, in this embodiment, it is preferable that the voltage regulation module includes a voltage reduction circuit, a rectification circuit, a voltage stabilizing circuit, a filter circuit and an anti-surge circuit, the voltage reduction circuit is used for reducing high voltage of the power supply module into low voltage, the rectification circuit is used for converting alternating current voltage into direct current voltage, the voltage stabilizing circuit is used for stabilizing voltage, the filter circuit is used for filtering alternating current voltage in the direct current voltage, and the anti-surge circuit is used for buffering the circuit and protecting electronic components in the circuit from being damaged.
In order to realize stable issuing and output of the command and realize stable receiving of the command, in this embodiment, preferably, the PWM module is used to realize that the duty ratio of the square wave is modulated to encode the level of a specific analog signal, and the command of the system is output and issued, the analog-to-digital conversion module is used to realize conversion of the detected current analog signal, the operational amplifier circuit is used to realize amplification processing of the control signal, so as to prevent the control signal from being lost or the signal is weak, thereby causing control error.
In order to realize carrying out the frame setting to current-limiting circuit breaker high speed contact, be convenient for drive the regulation, in this embodiment, preferred, still including bottom plate 1, the four corners department fixed mounting of bottom plate 1 has support column 2, fixed mounting has roof 3 and diaphragm 4 on the support column 2, roof 3 with be equipped with between the diaphragm 4 electromagnetic mechanism 6 with elastic mechanism 5.
In order to prevent collision damage in the descending process, in this embodiment, preferably, a buffering mechanism 7 is arranged on the top plate 3, the buffering mechanism 7 includes a first moving rod 701, the moving magnet 605 is fixedly connected to the first moving rod 701, an end of the first moving rod 701 is fixedly connected to the elastic housing 501, a second spring 702 is fixedly arranged on the top plate 3, the second spring 702 is sleeved on the first moving rod 701, a first limiting plate 703 is fixedly arranged at an end of the first moving rod 701, four sliding rods 704 are arranged on the top plate 3, the four sliding rods 704 penetrate through the first limiting plate 703, and second limiting plates 705 are fixedly arranged at top ends of the sliding rods 704.
In order to facilitate on/off of the contact and to perform energization, in this embodiment, preferably, a fixing block 8 is fixedly mounted on the bottom plate 1, a fixed contact 9 is fixedly mounted on the fixing block 8, and a plurality of connector lugs 10 are arranged on the fixing block 8.
In order to connect the movable contact 12 to perform contact connection with the fixed contact 9 and to achieve on-off adjustment, in this embodiment, it is preferable that a second moving rod 11 is fixedly installed at a bottom end of the moving plate 506, a movable contact 12 is fixedly connected to a bottom end of the second moving rod 11, and the movable contact 12 is in contact connection with the fixed contact 9.
In order to push and pull the moving plate 506 by the electromagnetic force and facilitate the connection of the second moving rod 11 to the movable contact 12, in this embodiment, preferably, an electromagnetic repulsion mechanism 505 is fixedly installed on the horizontal plate 4, a third limiting plate 504 is fixedly installed at an end of the telescopic rod 502, a through hole is formed in the horizontal plate 4, and the second moving rod 11 penetrates through the through hole.
The working principle and the using process of the invention are as follows: when the electromagnetic contactor is used, the power supply module and the voltage regulating module are used for supplying power to a system, the current detection module is used for detecting current, data information of the current detection is transmitted to the control module, the control module drives the electromagnetic module through the PWM module and the driving module, the power supply module supplies power to the electromagnetic module through the relay module, the driving module outputs an instruction to the relay module through the operational amplification module, control adjustment is performed, namely the movable contact 12 needs to be lifted, when power failure is realized, the first electromagnet 602 generates magnetic force to adsorb the movable magnet 605, and the electromagnetic repulsion mechanism 505 jacks the movable plate 506, so that the movable magnets 605 and 506 are lifted, and the movable contact 12 and the fixed contact movable plate 9 are separated, then, the elastic mechanism 5 comprises the telescopic rod 502 and the first spring 503 to realize safety protection of the equipment and prevent collision damage, when the equipment needs to be switched on, the second electromagnet 604 and the electromagnetic repulsion mechanism 505 are electrified to realize that the moving magnet 605 and the moving plate 506 are subjected to downward force, so that the movable contact 12 and the fixed contact 9 can be electrified in a contact manner, the elastic mechanism 5 comprises the telescopic rod 502 and the first spring 503 to realize safety protection of the equipment, and the top plate 3 is provided with the buffer mechanism 7 to realize buffer protection and prevent collision damage.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a current-limiting circuit breaker high speed contact actuating mechanism based on electromagnetic force, includes control module, its characterized in that: the control module is electrically connected with a voltage regulating module, the voltage regulating module is electrically connected with a power supply module, the power supply module is electrically connected with a current detection module, the current detection module is electrically connected with an on-off switch module, the current detection module is electrically connected with an analog-to-digital conversion module, the analog-to-digital conversion module is electrically connected with the control module, the control module is electrically connected with a PWM module, the PWM module is electrically connected with a driving module, the driving module is electrically connected with an electromagnetic module, the power supply module is electrically connected with a relay module, the relay module is electrically connected with the electromagnetic module, the relay module is electrically connected with an operational amplification module, and the operational amplification module is electrically connected with the driving module;
the device also comprises an electromagnetic mechanism (6) and an elastic mechanism (5);
the electromagnetic mechanism (6) comprises a protective shell (601), a first electromagnet (602), a permanent magnet (603) and a second electromagnet (604) are arranged in the protective shell (601), the permanent magnet (603) is arranged between the first electromagnet (602) and the second electromagnet (604), and a moving magnet (605) is arranged between the first electromagnet (602), the permanent magnet (603) and the second electromagnet (604);
the elastic mechanism (5) comprises an elastic shell (501), a moving plate (506) and an electromagnetic repulsion mechanism (505), wherein an expansion rod (502) is arranged on the moving plate (506), the expansion rod (502) penetrates through the elastic shell (501), a first spring (503) is sleeved on the expansion rod (502), and the bottom end of the first spring (503) is fixedly connected with the moving plate (506).
2. The high-speed contact driving mechanism of the current-limiting circuit breaker based on electromagnetic force of claim 1, wherein: the last electrically connected of control module has supplementary module, including alarm, display and control button in the supplementary module, what the alarm adopted is audible-visual annunciator.
3. The high-speed contact driving mechanism of the current-limiting circuit breaker based on electromagnetic force of claim 2, wherein: the auxiliary module further comprises a communication module and a storage module, the communication module is used for uploading data information, the storage module is used for storing an operation program body and an operation log, and the storage module comprises a ROM storage module and a RAM storage module.
4. The high-speed contact driving mechanism of the current-limiting circuit breaker based on electromagnetic force of claim 1, wherein: including step-down circuit, rectifier circuit, voltage stabilizing circuit, filter circuit and anti-surge circuit in the voltage regulating module, step-down circuit is used for realizing right power module's high voltage reduces into low-voltage, rectifier circuit is used for realizing converting alternating voltage to DC voltage, voltage stabilizing circuit is used for realizing stabilizing voltage, filter circuit is arranged in realizing all alternating voltage in the DC voltage and carries out the filtering, anti-surge circuit is used for realizing buffering the circuit, and electronic components in the protection circuit does not receive the damage.
5. The high-speed contact driving mechanism of the current-limiting circuit breaker based on electromagnetic force of claim 1, wherein: the PWM module is used for realizing that the duty ratio of a square wave is modulated to encode the level of a specific analog signal, the output and the distribution of a system instruction are realized, the analog-to-digital conversion module is used for realizing the conversion of a detected current analog signal, and the operational amplification circuit is used for realizing the amplification processing of a control signal, so that the control signal is prevented from being lost or being weak in signal, and the control error is prevented.
6. The high-speed contact driving mechanism of the current-limiting circuit breaker based on electromagnetic force of claim 1, wherein: still including bottom plate (1), the four corners department fixed mounting of bottom plate (1) has support column (2), fixed mounting has roof (3) and diaphragm (4) on support column (2), roof (3) with be equipped with between diaphragm (4) electromagnetic mechanism (6) with elastic mechanism (5).
7. The high-speed contact driving mechanism of the current-limiting circuit breaker based on electromagnetic force of claim 6, wherein: be equipped with buffer gear (7) on roof (3), buffer gear (7) include first carriage release lever (701), fixedly connected with on first carriage release lever (701) move magnet (605), the tip fixed connection of first carriage release lever (701) is in on elastic housing (501), fixed second spring (702) that is equipped with on roof (3), second spring (702) cup joint on first carriage release lever (701), the tip fixed mounting of first carriage release lever (701) has first limiting plate (703), be equipped with four slide bar (704) on roof (3), four slide bar (704) run through first limiting plate (703), the top of slide bar (704) all is fixed and is equipped with second limiting plate (705).
8. The high-speed contact driving mechanism of the current-limiting circuit breaker based on electromagnetic force of claim 7, wherein: the bottom plate (1) is fixedly provided with a fixing block (8), the fixing block (8) is fixedly provided with a fixed contact (10), and the fixing block (8) is provided with a plurality of connector lugs (10).
9. The high-speed contact driving mechanism of the current-limiting circuit breaker based on electromagnetic force of claim 8, wherein: the bottom end of the moving plate (506) is fixedly provided with a second moving rod (11), the bottom end of the second moving rod (11) is fixedly connected with a movable contact (12), and the movable contact (12) is in contact connection with the fixed contact (9).
10. The high-speed contact driving mechanism of the current-limiting circuit breaker based on electromagnetic force of claim 9, wherein: the electromagnetic repulsion mechanism (505) is fixedly mounted on the transverse plate (4), the third limiting plate (504) is fixedly mounted at the end part of the telescopic rod (502), a through hole is formed in the transverse plate (4), and the second moving rod (11) penetrates through the through hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2021115274220 | 2021-12-14 | ||
| CN202111527422 | 2021-12-14 |
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| CN114582684A true CN114582684A (en) | 2022-06-03 |
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| CN110224379A (en) * | 2018-03-01 | 2019-09-10 | 郑州大学 | Based on vacuum and the concatenated novel high-pressure dc circuit breaker of SF6 arc-chutes |
| CN110838422A (en) * | 2019-12-05 | 2020-02-25 | 国网内蒙古东部电力有限公司赤峰供电公司 | A fast switch for intelligent power distribution network |
| CN212570905U (en) * | 2020-08-26 | 2021-02-19 | 浙江宝丰机电有限公司 | Electromagnetic system of plastic case type circuit breaker |
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