LU102630B1 - IoT-based Overcurrent Protection Device for Power Supply Line - Google Patents

IoT-based Overcurrent Protection Device for Power Supply Line Download PDF

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Publication number
LU102630B1
LU102630B1 LU102630A LU102630A LU102630B1 LU 102630 B1 LU102630 B1 LU 102630B1 LU 102630 A LU102630 A LU 102630A LU 102630 A LU102630 A LU 102630A LU 102630 B1 LU102630 B1 LU 102630B1
Authority
LU
Luxembourg
Prior art keywords
main housing
protection device
iot
overcurrent protection
power supply
Prior art date
Application number
LU102630A
Other languages
French (fr)
Inventor
Chaoli Tang
Junhui Cheng
Xueping Jiang
Jian Li
Shanyong Xu
Yourui Huang
Tao Han
Original Assignee
Univ West Anhui
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Univ West Anhui filed Critical Univ West Anhui
Application granted granted Critical
Publication of LU102630B1 publication Critical patent/LU102630B1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/56—Cooling; Ventilation
    • H02B1/565—Cooling; Ventilation for cabinets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/03—Application domotique, e.g. for house automation, bus connected switches, sensors, loads or intelligent wiring
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/14—Protecting elements, switches, relays or circuit breakers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Static Devices (AREA)

Abstract

The present invention relates to the technical field of power engineering, and discloses an IoT-based overcurrent protection device for power supply line, aiming at solving the overcurrent power-off safety problem of circuit breaker. Specifically, the overcurrent protection device comprises a main housing, wherein a first opening is arranged at the bottom of one side of the main housing, a horizontal switching gate is rotationally fixed between inner walls on both sides of the first opening, two inlet ports are horizontally arranged at one side of the bottom of one end of the main housing, and two outlet ports are horizontally arranged at another side thereof. The overcurrent protection device of the present invention is directly energized by an electromagnet arranged at the bottom thereof at high heating temperature. The electromagnet generates magnetism, which attracts an iron block at the top of the device to pull down a contact fixed rod and achieve the power-off protection. Then, an internal electric push rod is elongated and clamped into a limiting groove by a limiting block to prevent an accidental closing of the switching gate and improve the work safety.

Description

IoT-based Overcurrent Protection Device for Power Supply Line LU102630 Field of the Invention The present invention relates to the technical field of power engineering, in particular to an IoT-based overcurrent protection device for power supply line. Background of the Invention After the 20" century, electric energy mainly relies on thermal power plants, hydropower stations and nuclear power plants; while tidal energy, geothermal energy and wind energy are also used to generate electricity where possible. The transmission and distribution of electric energy are mainly achieved through high and low voltage AC power grid. The development trend of transmission engineering technology is to study the extra-high voltage (more than 1 million volts) AC and DC transmission technology to form a larger power grid, and solve the technical problems of superconducting power transmission.
For existing power engineering end customers, the current protection device shall be installed for the sake of electrical safety. However, existing current protection device can be re-electrified internally even after self-disconnected in use, which will cause damage unknowingly, and pose a great hidden danger to the power transmission and the electrical safety.
Summary of the Invention Based on the technical problems in the background art, the present invention provides an IoT-based overcurrent protection device for power supply line.
The present invention provides an IoT-based overcurrent protection device for power supply line, comprising a main housing, a first opening is arranged at the bottom of one side of the main housing, a horizontal switching gate is rotationally fixed between inner walls on both sides of the first opening, two inlet ports are horizontally arranged at one side of the bottom of one end of the main housing, two outlet ports are horizontally arranged at another side thereof, a fixed plate is vertically arranged at one side between two inner walls of the main housing, a fixed block is horizontally arranged at the bottom of one side of the fixed plate, an electromagnet is horizontally arranged at the top of the fixed bd! 02630 a contact fixed rod is horizontally arranged on a circumferential outer wall of the switching gate at an inner position of the main housing, an iron block is horizontally arranged at one side of the bottom of the contact fixed rod, the bottom of the iron block is attracted to the top of the electromagnet, a limiting spring is diagonally arranged at the middle position of the bottom of the contact fixed rod, the bottom of the limiting spring is connected with the bottom of inner wall of one side of the main housing, an electrified coil is vertically arranged at the top of one side of the fixed plate, the bottom of the electrified coil is in contact with the top of one side of the contact fixed rod, a mounting and fixing groove is vertically arranged at the bottom of circumferential inner wall of the switching gate, an electric push rod is vertically sleeved on the circumferential inner wall of the mounting and fixing groove, a limiting block is vertically arranged at a bottom output end of the electric push rod, a limiting groove is arranged on an inner wall of one side of the main housing at the bottom of the first opening, and is clamped into the inside of the limiting block, and an IoT module is bolted to the top of the inner wall of one side of the main housing.
Preferably, a fixed mainboard is vertically arranged on the other side of the main housing, and fixed bolt holes are horizontally arranged at both ends of the top and bottom of the fixed mainboard.
Preferably, a second opening is arranged at the top of one side of the main housing, and fixed with a horizontal locking switch.
Preferably, a second current-conducting plate is vertically arranged at one side of the fixed plate, and a first current-conducting plate is vertically arranged at one side of the second current-conducting plate.
Preferably, a fire extinguishing arc is vertically arranged at one end of the top inner wall of the main housing.
Preferably, a temperature sensor is vertically arranged at the middle position of the top inner wall of the main housing, and disposed at the top of the electrified coil. LU102630 Preferably, a signal output end of the temperature sensor is electrically connected with a signal receiving end of the electromagnet.
Preferably, a heat sink is horizontally arranged at the middle position of one side of the main housing.
Preferably, a cooling fan is horizontally arranged at the middle position of the heat sink, and an air outlet of the cooling fan is oriented outward.
Preferably, a filter screen plate is vertically arranged at one side of the circumferential inner wall of the heat sink.
In the present invention:
1. the overcurrent protection device is directly energized by an electromagnet arranged at the bottom thereof at high heating temperature; the electromagnet generates magnetism, which attracts an iron block at the top of the device to pull down a contact fixed rod and achieve the power-off protection; then an internal electric push rod is elongated and clamped into a limiting groove by a limiting block to prevent an accidental closing of the switching gate and improve the work safety;
2. the locking switch is closed and the switching gate is pushed to run downwards, so that the contact fixed rod at the internal position is in contact with the bottom of the electrified coil at the top of the fixed plate to start an electric conduction process, during which the positive and negative poles become conductive through the first current-conducting plate and the second current-conducting plate respectively;
3. a heat sink is arranged at one side of the main housing and internally provided with a cooling fan for quick cooling after the internal power-off, so as to prevent the device from being softened and damaged; and a filter screen plate is arranged to provide a dustproof effect, thus improving the cleanliness of the device.
Brief Description of Drawings
Fig. 1 shows an overall structure of an IoT-based overcurrent protectiof] 02630 device for power supply line according to the present invention.
Fig. 2 is a side and section view of an IoT-based overcurrent protection device for power supply line according to the present invention.
Fig. 3 is a structural diagram of a locking mechanism of an IoT-based overcurrent protection device for power supply line according to the present invention.
Fig. 4 is a structural diagram of a heat sink of an IoT-based overcurrent protection device for power supply line according to the present invention.
Symbols in the drawings are as follows: 1 inlet port, 2 outlet port, 3 switching gate, 4 locking switch, 5 fixed bolt hole, 6 fixed mainboard, 7 main housing, 8 limiting spring, 9 contact fixed rod, 10 electrified coil, 11 temperature sensor, 12 fire extinguishing arc, 13 first current-conducting plate, 14 second current-conducting plate, 15 iron block, 16 fixed block, 17 fixed plate, 18 electromagnet, 19 limiting groove, 20 limiting block, 21 electric push rod, 22 mounting and fixing groove, 23 cooling fan, 24 filter screen plate, 25 heat sink, 26 IoT module.
Detailed Description of the Preferred Embodiments Embodiments of the patent are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar designations from beginning to end indicate the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the patent and are not to be construed as limiting the patent.
In the description of the patent, the azimuth or position relationship indicated by the terms "center", "above", "under", "front" , "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like is the azimuth or position relationship shown based on the accompanying drawings, and is only used to facilitate and simplify the description of the present application rath! 02630 than to indicate or imply that the device or element referred to must have the particular azimuth or be constructed or operated in the particular azimuth, and thus shall not be constructed as a limitation to the patent..
5 In the description of the patent, it should be noted that the terms "installed", "connected", "attached" and "arranged" shall be understood in a broad sense unless otherwise expressly specified or defined. For example, it can be fixedly connected and arranged, or detachably connected and arranged, or integrally connected and arranged. For a person of ordinary skill in the art, the specific meaning of the above terms in the context of the patent can be understood in specific cases.
Example 1 By referring to Figs. 1-3, an IoT-based overcurrent protection device for power supply line comprises a main housing 7, wherein a first opening is arranged at the bottom of one side of the main housing 7, a horizontal switching gate 3 is rotationally fixed between inner walls on both sides of the first opening, two inlet ports 1 are horizontally arranged at one side of the bottom of one end of the main housing 7, outlet ports 2 are horizontally arranged at another side of the bottom of one end of the main housing 7, a fixed plate 17 is vertically arranged at one side between two inner walls of the main housing 7, a fixed block 16 is horizontally arranged at the bottom of one side of the fixed plate 17, an electromagnet 18 is horizontally arranged at the top of the fixed block 16, a contact fixed rod 9 is horizontally arranged on a circumferential outer wall of the switching gate 3 at an inner position of the main housing 7, an iron block 15 is horizontally arranged at one side of the bottom of the contact fixed rod 9, the bottom of the iron block 15 is attracted to the top of the electromagnet 18, a limiting spring 8 is diagonally arranged at the middle position of the bottom of the contact fixed rod 9, the bottom of the limiting spring 8 is connected with the bottom of inner wall of one side of the main housing 7, an electrified coil 10 is vertically arranged at the top of one side of the fixed plate 17, the bottom of thé 02630 electrified coil 10 is in contact with the top of one side of the contact fixed rod 9, a mounting and fixing groove 22 is vertically arranged at the bottom of circumferential inner wall of the switching gate 3, an electric push rod 21 is vertically sleeved on the circumferential inner wall of the mounting and fixing groove 22, a limiting block 20 is vertically arranged at a bottom output end of the electric push rod 21, a limiting groove 19 is arranged on an inner wall of one side of the main housing 7 at the bottom of the first opening, and is clamped into the inside of the limiting block 20, and an IoT module 26 is bolted to the top of the inner wall of one side of the main housing 7.
In the present invention, a fixed mainboard 6 is vertically arranged on the other side of the main housing 7, and fixed bolt holes 5 are horizontally arranged at both ends of the top and bottom of the fixed mainboard 6, a second opening is arranged at the top of one side of the main housing 7, and fixed with a horizontal locking switch 4, a second current-conducting plate 14 is vertically arranged at one side of the fixed plate 17, a first current-conducting plate 13 is vertically arranged at one side of the second current-conducting plate 14, a fire extinguishing arc 12 is vertically arranged at one end of the top inner wall of the main housing 7, a temperature sensor 11 is vertically arranged at the middle position of the top inner wall of the main housing 7, and disposed at the top of the electrified coil 10, and a signal output end of the temperature sensor 11 is electrically connected with a signal receiving end of the electromagnet 18.
In this embodiment, when the IoT-based overcurrent protection device for power supply line is used, an operator firstly installs the protection device through the fixed bolt holes 5 at the top and bottom of the fixed mainboard 6, then connects the inlet port 1 and outlet port 2 at the bottom with the current lead of the connecting equipment, which are stably fixed and connected to the power supply. In use, a user closes the locking switch 4 and pushes the switching gate 3 to run downwards, so that the contact fixed rod 9 at the internal position is in contact with the bottom of the electrified coil 10 at the top of the fixed plate} t0 02650 start an electric conduction process, during which the positive and negative poles become conductive through a first current-conducting plate 13 and a second current-conducting plate 14 respectively. In the electric conduction process, the protection device can operate normally and the temperature sensor 11 at the top position can maintain a real-time working process. The overcurrent protection device is directly energized by an electromagnet 18 arranged at the bottom thereof at high heating temperature; the electromagnet 18 generates magnetism, which attracts an iron block 15 at the top of the device to pull down a contact fixed rod 9 and achieve the power-off protection; and an internal electric push rod 21 is elongated and clamped into a limiting groove 19 by a limiting block 20 to prevent an accidental closing of the switching gate and improve the work safety. The protection device can be completely integrated into the internet of things through the IoT module 26 for networking use.
Example 2 By referring to Figs. 1-4, in an IoT-based overcurrent protection device for power supply line, a heat sink 25 is horizontally arranged at the middle position of one side of the main housing 7, a cooling fan 23 is horizontally arranged at the middle position of the heat sink 25, an air outlet of the cooling fan 23 is oriented outward, and a filter screen plate 24 is vertically arranged at one side of the circumferential inner wall of the heat sink 25.
Example 2 is based on Example 1. When the overcurrent protection device 1s used, a heat sink 25 is arranged at one side of the main housing 7 and internally provided with a cooling fan 23 for quick cooling after the internal power-off, so as to prevent the device from being softened and damaged; and a filter screen plate 24 is arranged to provide a dustproof effect, thus improving the cleanliness of the device.
The foregoing is only the preferred embodiments of the present invention and is not for use in limiting the present invention. Therefore, any equivalent substitutions or changes made within the technical scope disclosed herein by 02650 person skilled in the art according to the technical scheme and inventive concept of the present invention shall be included in the protection scope of the present invention.

Claims (10)

CLAIMS LU102630
1. An IoT-based overcurrent protection device for power supply line, comprising a main housing (7), characterized in that a first opening is arranged at the bottom of one side of the main housing (7), a horizontal switching gate (3) is rotationally fixed between inner walls on both sides of the first opening, two inlet ports (1) are horizontally arranged at one side of the bottom of one end of the main housing (7), outlet ports (2) are horizontally arranged at another side of the bottom of one end of the main housing (7), a fixed plate (17) is vertically arranged at one side between two inner walls of the main housing (7), a fixed block (16) is horizontally arranged at the bottom of one side of the fixed plate (17), an electromagnet (18) is horizontally arranged at the top of the fixed block (16), a contact fixed rod (9) is horizontally arranged on a circumferential outer wall of the switching gate (3) at an inner position of the main housing (7), an iron block (15) is horizontally arranged at one side of the bottom of the contact fixed rod (9), the bottom of the iron block (15) is attracted to the top of the electromagnet (18), a limiting spring (8) is diagonally arranged at the middle position of the bottom of the contact fixed rod (9), the bottom of the limiting spring (8) is connected with the bottom of inner wall of one side of the main housing (7), an electrified coil (10) is vertically arranged at the top of one side of the fixed plate (17), the bottom of the electrified coil (10) is in contact with the top of one side of the contact fixed rod (9), a mounting and fixing groove (22) is vertically arranged at the bottom of circumferential inner wall of the switching gate (3), an electric push rod (21) is vertically sleeved on the circumferential inner wall of the mounting and fixing groove (22), a limiting block (20) is vertically arranged at a bottom output end of the electric push rod (21), a limiting groove (19) is arranged on an inner wall of one side of the main housing (7) at the bottom of the first opening, and is clamped into the inside of the limiting block (20), and an IoT module (26) is bolted to the top of the inner wall of one side of the main housing (7).
2. The IoT-based overcurrent protection device for power supply 1hte 02630 according to claim 1, characterized in that a fixed mainboard (6) is vertically arranged on the other side of the main housing (7), and fixed bolt holes (5) are horizontally arranged at both ends of the top and bottom of the fixed mainboard (6).
3. The IoT-based overcurrent protection device for power supply line according to claim 2, characterized in that a second opening is arranged at the top of one side of the main housing (7), and fixed with a horizontal locking switch 4).
4. The IoT-based overcurrent protection device for power supply line according to claim 1, characterized in that a second current-conducting plate (14) is vertically arranged at one side of the fixed plate (17), and a first current-conducting plate (13) is vertically arranged at one side of the second current-conducting plate (14).
5. The IoT-based overcurrent protection device for power supply line according to claim 4, characterized in that a fire extinguishing arc (12) is vertically arranged at one end of the top inner wall of the main housing (7).
6. The IoT-based overcurrent protection device for power supply line according to claim 1, characterized in that a temperature sensor (11) is vertically arranged at the middle position of the top inner wall of the main housing (7), and disposed at the top of the electrified coil (10).
7. The IoT-based overcurrent protection device for power supply line according to claim 6, characterized in that a signal output end of the temperature sensor (11) is electrically connected with a signal receiving end of the electromagnet (18).
8. The IoT-based overcurrent protection device for power supply line according to claim 1, characterized in that a heat sink (25) is horizontally arranged at the middle position of one side of the main housing (7).
9. The IoT-based overcurrent protection device for power supply line according to claim 8, characterized in that a cooling fan (23) is horizontal 02630 arranged at the middle position of the heat sink (25), and an air outlet of the cooling fan (23) is oriented outward.
10. The IoT-based overcurrent protection device for power supply line according to claim 9, characterized in that a filter screen plate (24) is vertically arranged at one side of the circumferential inner wall of the heat sink (25).
LU102630A 2020-08-27 2021-03-08 IoT-based Overcurrent Protection Device for Power Supply Line LU102630B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010879534.1A CN112018721A (en) 2020-08-27 2020-08-27 Power supply line overcurrent protection device based on Internet of things

Publications (1)

Publication Number Publication Date
LU102630B1 true LU102630B1 (en) 2021-09-23

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Application Number Title Priority Date Filing Date
LU102630A LU102630B1 (en) 2020-08-27 2021-03-08 IoT-based Overcurrent Protection Device for Power Supply Line

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CN (1) CN112018721A (en)
LU (1) LU102630B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115297053A (en) * 2022-08-01 2022-11-04 昆山六二丰塑胶电子有限公司 Energy-concerving and environment-protective type anti-overload router

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112985509A (en) * 2021-03-19 2021-06-18 易秋元 Electrical engineering fire prevention monitoring system and use method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115297053A (en) * 2022-08-01 2022-11-04 昆山六二丰塑胶电子有限公司 Energy-concerving and environment-protective type anti-overload router
CN115297053B (en) * 2022-08-01 2023-07-14 昆山六二丰塑胶电子有限公司 Energy-saving environment-friendly overload-prevention router

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Effective date: 20210923