CN113053682B - Air-cooled air pipe, ventilation housing and multipoint cooling device for circuit breaker - Google Patents
Air-cooled air pipe, ventilation housing and multipoint cooling device for circuit breaker Download PDFInfo
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- CN113053682B CN113053682B CN202110255105.1A CN202110255105A CN113053682B CN 113053682 B CN113053682 B CN 113053682B CN 202110255105 A CN202110255105 A CN 202110255105A CN 113053682 B CN113053682 B CN 113053682B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/62—Heating or cooling of contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
- H01H2009/526—Cooling of switch parts of the high voltage switches
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The circuit breaker comprises an air-cooled air pipe, a ventilation shell and a multipoint cooling device, wherein the air-cooled air pipe, the ventilation shell and the multipoint cooling device are used for the circuit breaker; the air-cooled air pipe is used for directly introducing cold air in an external environment into a heating position inside the circuit breaker, and when the heating heat of the circuit breaker is not radiated to the periphery, the circuit breaker is cooled in advance, so that the circuit breaker is cooled more effectively and quickly; the heating position and the heating heat are timely found by monitoring of the control system, and the circuit breaker is appropriately cooled by controlling the cooling strength of the cooling device, so that energy can be saved, and accurate cooling can be realized; then, accelerating the gas flowing speed in the air-cooled air pipe by using a fan in the cooling device; the invention adjusts the temperature of the circuit breaker by accelerating the heat dissipation, realizes the cooling of the circuit breaker and ensures that the circuit breaker operates more reliably and safely.
Description
Technical Field
The invention relates to the field of circuit breaker equipment, in particular to an air-cooled air pipe, a ventilation shell and a multi-point type cooling device for a circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying and opening/closing a current under a normal circuit condition and closing, carrying and opening/closing a current under an abnormal circuit condition within a specified time, and is widely applied to the field of power distribution and transmission. The existing cooling technology for the drawer type circuit breaker generally adopts two modes of reducing loop resistance and accelerating heat dissipation, wherein the reduction of the loop resistance specifically comprises the optimization design of improving a bridge type contact and the optimization design of a moving contact and a static contact, but the design of considering factors such as breaking capacity, cost and the like has already reached a bottleneck. Therefore, the invention provides a technical method for accelerating heat dissipation.
Disclosure of Invention
An object of the present invention is to provide an air-cooled duct, a ventilation housing, and a multi-point cooling device for a circuit breaker, thereby solving the aforementioned problems in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the air-cooled air pipe for the circuit breaker comprises an air pipe barrel, a main air pipe and an air outlet pipe; one end of the main air pipe is provided with an air inlet, and the side surface of the main air pipe is provided with an installation opening of the air pipe barrel; the number of the air duct tubes is more than one, the interface end of each air duct tube is mounted at the mounting opening of the main air duct, and the air outlet of each air duct tube is mounted at one side of a bridge-type contact system of the circuit breaker; the air outlet pipe is arranged on the other side of the bridge type contact system; and low-temperature air enters the air-cooled air pipe through the air inlet of the main air pipe, the low-temperature air is introduced into one side of the bridge contact system through the air pipe barrel, and hot air generated by the bridge contact system is pushed by the low-temperature air in the air pipe barrel and is led out from the air outlet pipe.
Preferably, the air outlet of the air duct cylinder is led into the outer side of the joint of the fixed contact and the bridge contact blade in the bridge contact system, the joint of the bridge contact blade and the external busbar and the joint of the movable contact and the bridge contact blade.
Preferably, the air pipe barrel is respectively provided with an upper left air pipe, a lower right air pipe, a middle air pipe, a lower left air pipe and an upper right air pipe.
Preferably, the air outlet of the left lower air pipe is led into the outer side of the joint of the moving contact and the bridge contact blade in the bridge contact system; the air outlet of the upper left air pipe is led into the outer side of the joint of the fixed contact and the bridge-type contact blade in the bridge-type contact system; an air outlet of the upper right air pipe is led into the outer side of the joint of the bridge type static contact blade and the external bus bar in the bridge type contact system; and an air outlet of the right lower air pipe is led into the outer side of the joint of the external busbar and the bridge-type moving contact piece in the bridge-type contact system.
The ventilation shell is of an integral structure and is arranged outside a conductive system of the circuit breaker; the inner side of the ventilation shell is provided with a conductive system mounting position and a gas pipeline; the conductive system mounting position is tightly sleeved outside the conductive system; the gas pipeline is arranged around the conductive system installation position, one side of the ventilation shell is communicated with the external environment, the inner side of the ventilation shell is communicated with the conductive system installation position, and the gas pipeline communicated with the outside is arranged on the upper side and the lower side of the ventilation shell.
Preferably, the ventilation shell is made of bakelite.
The multipoint cooling system for the circuit breaker comprises an air cooling air pipe, a control system and a cooling device; the air-cooled air pipe is arranged around the conductive elements in the circuit breaker, the air outlet of the air-cooled air pipe is arranged at the connecting part and the lap joint part between the conductive elements, and the cooling device is tightly arranged at the interface position of the air-cooled air pipe; the control system comprises a control module and a collecting mutual inductance module, the collecting mutual inductance module is connected with the control module, the control module is connected with the cooling device, and the collecting mutual inductance module is connected with a controller of the circuit breaker;
the control system controls the starting, stopping and cooling intensity of the cooling device; the full load rate of the current of the main loop of the circuit breaker, the temperature alarm signal of the circuit breaker and the temperature of the conductive element of the circuit breaker are collected through the collecting mutual inductance module and transmitted to the control module; the control module controls the working state of the cooling device and adjusts the cooling intensity of the cooling device according to the full load rate of the main loop current and the temperature alarm signal;
the cooling device provides a fan for cooling, cold air outside the circuit breaker is transmitted to the interior of the circuit breaker through the fan, and cooling is realized through ventilation of the circuit breaker;
the forced air cooling tuber pipe does inside and the external environment of circuit breaker provide the circulation of air passageway, and will cold air among the external environment is leading-in the position and the maximum position that generates heat of generating heat of circuit breaker the heat that the circuit breaker sent when not diffusing, cools off in advance.
Preferably, the first heating point of the circuit breaker comprises a joint of a fixed contact and a bridge-type contact piece, and the joint of the bridge-type contact piece and an external busbar and the joint of a movable contact and the bridge-type contact piece.
Preferably, the edge position of circuit breaker casing installs out the tuber pipe, the inside hot-air of circuit breaker passes through it forces the derivation to go on the heat dissipation to go out the tuber pipe.
A multipoint cooling system for a circuit breaker comprises a ventilation housing, a control system and a temperature reduction device; the cooling device is tightly arranged on the outer side of the gas pipeline on the side surface of the ventilation shell; the control system comprises a control module and a mutual inductance acquisition module, the mutual inductance acquisition module is connected with the control module, the control module is connected with the cooling device, and the mutual inductance acquisition module is connected with a controller of the circuit breaker;
the control system controls the starting, stopping and cooling intensity of the cooling device; the full load rate of the current of the main circuit of the circuit breaker, the temperature alarm signal of the circuit breaker and the temperature of a conductive element of the circuit breaker are collected through the collecting mutual inductance module and transmitted to the control module; the control module controls the working state of the cooling device and adjusts the cooling intensity of the cooling device according to the full load rate of the main loop current and the temperature alarm signal;
the cooling device provides a fan for cooling, cold air outside the circuit breaker is transmitted to the interior of the circuit breaker through the fan, and cooling is realized through ventilation of the circuit breaker;
the ventilation casing, for inside and the external environment of circuit breaker provide the circulation of air passageway, and will cold air among the external environment is leading-in the circuit breaker when the heat that the circuit breaker sent does not spread, cools off in advance.
The invention has the beneficial effects that: the invention discloses an air-cooled air pipe, a ventilation shell and a multipoint cooling device for a circuit breaker, wherein the air-cooled air pipe is used for directly introducing cold air in an external environment into a heating position inside the circuit breaker, and when the heating heat of the circuit breaker is not radiated to the periphery, the circuit breaker is cooled in advance, so that the circuit breaker is cooled more effectively and quickly; the heating position and the heating heat are timely found by monitoring of the control system, and the circuit breaker is appropriately cooled by controlling the cooling strength of the cooling device, so that energy can be saved, and accurate cooling can be realized; then, accelerating the gas flowing speed in the air-cooled air pipe by using a fan in the cooling device; the invention realizes the cooling of the circuit breaker by accelerating the heat dissipation, so that the operation of the circuit breaker is more reliable and safer.
Drawings
FIG. 1 is a drawing of a wind cooling air duct installation structure in a circuit breaker;
FIG. 2 is a view of the internal structure of the conductive system;
FIG. 3 is a structural diagram of a main air duct in the air-cooling air duct;
FIG. 4 is a view of the installation structure of the air-cooled duct in the circuit breaker;
FIG. 5 is a schematic view of an air-cooled duct;
FIG. 6 is a structural view of the installation of the air cooling duct and the conductive system;
FIG. 7 is a view showing the structure of a ventilation casing
FIG. 8 is a view of the construction of the air duct cartridge;
FIG. 9 is a view of the internal components of the air-cooled duct;
in the figure, 1-shell, 2-conductive system, 3-air cooling air pipe, 4-ventilation shell, 21-static contact, 22-bridge type contact system, 23-external bus bar, 24-movable contact, 25-contact spring, 221-bridge type head piece, 222-bridge type contact support, 31-air pipe cylinder, 32-main air pipe, 33-air outlet pipe, 34-upper left air pipe, 35-lower left air pipe, 36-upper right air pipe, 37-lower right air pipe, 38-middle air pipe, 41-conductive system installation position, and 42-gas pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
An air-cooled air pipe for a circuit breaker is disclosed, as shown in fig. 1, an air-cooled air pipe 3 is installed on the basis of the traditional circuit breaker structure; and the air cooling air pipe 3 is used for communicating the conductive system 2 inside the circuit breaker with the external environment.
The internal structure of the conductive system 2 is shown in fig. 2, and includes a fixed contact 21, a bridge-type contact system 22, an external busbar 23, and a movable contact 24, where the bridge-type contact system 22 includes a bridge-type contact blade 221 and a bridge-type contact support 222; the bridge-type contact blade 221 is installed inside the bridge-type contact support 222, two sets of the bridge-type contact supports 222 installed with the bridge-type contact blade 221 are installed oppositely to form one set of the bridge-type contact system 22, each conductive system 2 includes two sets of the bridge-type contact systems 22, the fixed contact 21 and the movable contact 24 are respectively installed between the two bridge-type contact blades 221 in the two sets of the bridge-type contact systems 22, and the external busbar 23 is installed between the two bridge-type contact blades 221 on the other side of each set of the bridge-type contact system 22.
The structure of the air-cooled air duct 3 is shown in fig. 3, and comprises an air duct cylinder 31, a main air duct 32 and an air outlet duct 33; the main air ducts 32 are installed between the conductive systems 2 of the circuit breaker, the air duct tubes 31 are arranged at the installation ports on the side surfaces of the main air ducts 32, the connection structure of the main air ducts is as shown in fig. 4, the air outlets of the air duct tubes 31 are directly communicated with one side of the conductive system 2, and the air outlet ducts 33 are installed on the opposite side of the air duct tubes 31 of the conductive system 2; install air-cooled tuber pipe 3 the circulation of air direction of circuit breaker does: cold air in an external environment enters from the air inlet of the main air pipe 32, is guided into the periphery of the conductive system 2 through the main air pipe 32 and the air pipe barrel 31, and pushes hot air around the conductive system 2 to be guided out of the circuit breaker through the air outlet pipe 33.
According to the installation structure of the conductive system 2 inside the circuit breaker, the air-cooled duct 3 is respectively provided with a left upper duct 34, a left lower duct 35, a right upper duct 36, a right lower duct 37 and a middle air duct 38 on the duct barrel 31, as shown in fig. 5; the matching installation relationship of the air-cooled air duct 3 on the conductive system 2 of the circuit breaker is shown in fig. 6, and the air outlet of the left lower air duct 35 is led into the outer side of the joint of the movable contact 24 and the bridge-shaped contact blade 221 in the bridge-shaped contact system 22; the air outlet of the left upper air duct 34 is led into the outer side of the joint of the fixed contact 21 and the bridge contact blade 221 in the bridge contact system 22; the air outlets of the right upper air pipe 36 and the right lower air pipe 37 are respectively introduced to the outer sides of the joints of the two bridge-shaped contact blades 221 and the external busbar 23 in the bridge-shaped contact system 22;
the working principle of the air-cooled air pipe 3 is as follows: the first heating position and the maximum heating position inside the circuit breaker are the joint of the movable contact 24 and the bridge-type contact blade 221, the joint of the fixed contact 21 and the bridge-type contact blade 221 in the bridge-type contact system 22, and the joint of the bridge-type contact blade 221 and the external busbar 23; the cold air passes through air-cooled tuber pipe 3 main tuber pipe 32 is introduced inside the circuit breaker, utilize connect in on the main tuber pipe 32 the position and the position of generating heat at the earliest of foretell circuit breaker inside are introduced to the cold air in the upper left side tuber pipe 34, the lower left side tuber pipe 35, the upper right tuber pipe 36, the lower right tuber pipe 37 and the well tuber pipe 38, and when the volume heat that the position sent of generating heat has not spread outward yet, it is direct right the position of generating heat cools down, will the hot-air around the position of generating heat utilizes the cold air to replace, and passes through the hot-air outlet pipe 33 derives the circuit breaker realizes the cooling of circuit breaker.
A ventilated casing for a circuit breaker, as shown in fig. 7, is a bakelite element of unitary construction, mounted outside the conductive system of said circuit breaker; the inner side of the ventilation shell 4 is provided with a conductive system mounting position 41 and a gas pipeline 42; the conductive system mounting position 41 is tightly sleeved outside the conductive system; the gas pipeline 42 is arranged around the installation position of the conductive system, one side of the ventilation shell 4 is communicated with the external environment, the inner side of the ventilation shell 4 is communicated with the installation position 41 of the conductive system, and the gas pipeline 42 communicated with the outside is arranged on the upper side and the lower side of the ventilation shell 4.
The gas flow direction inside the ventilation housing 4 is: cold air of the external environment flows into the ventilation shell through the air pipeline 42 communicated with the side surface, and is guided into the conductive system mounting position 41, and hot air around the conductive system is forcibly guided out through the air pipeline 42 communicated with the shell up and down to dissipate heat.
The multi-point cooling device is constructed by utilizing the air-cooled air pipe for the circuit breaker, and comprises an air-cooled air pipe 3, a control system and a cooling device; the control system comprises an acquisition mutual inductance module and a control module, the air-cooled air pipe is arranged between the conductive systems in the breaker according to the installation position, and is led into the heating position in the conductive system by using the air pipe cylinder, namely the connection position and the lap joint position between the conductive elements in the breaker; the cooling device is hermetically connected with the air-cooled air pipe 3, and cold air in an external environment is introduced into the circuit breaker by using a fan; the mutual inductance acquisition module in the control system is arranged near the conductive system 2, is connected with a main loop in the circuit breaker, acquires the temperature of a heating position in the circuit breaker, monitors the full load rate of the current of the main loop and transmits the full load rate to the control module; the control module is connected with the cooling device;
the multi-point cooling device is constructed by utilizing the ventilation shell for the circuit breaker, and comprises the ventilation shell, a control system and a cooling device; the cooling device is tightly arranged on the outer side of the gas pipeline on the side surface of the ventilation shell; the control system comprises a control module and a mutual inductance acquisition module, the mutual inductance acquisition module is connected with the control module, the control module is connected with the cooling device, and the mutual inductance acquisition module is connected with a controller of the circuit breaker;
the control system in the multipoint cooling device controls the starting, stopping and cooling intensity of the cooling device; the full load rate of the current of the main loop of the circuit breaker, the temperature alarm signal of the circuit breaker and the temperature of the conductive element of the circuit breaker are collected through the collecting mutual inductance module and transmitted to the control module; the control module controls the working state of the cooling device and adjusts the cooling intensity of the cooling device according to the full load rate of the main loop current and the temperature alarm signal;
the cooling device provides a fan for cooling, cold air outside the circuit breaker is transmitted to the interior of the circuit breaker through the fan, and cooling is realized through ventilation of the circuit breaker;
the operating principle of the multi-point cooling device for the circuit breaker is as follows: the acquisition mutual inductance module is used for acquiring the full load rate and the temperature of the current of the main circuit of the circuit breaker and transmitting the full load rate and the temperature to the control module, and the control module adjusts the cooling intensity of the cooling device according to the data transmitted by the acquisition fuzzy inductance module; the cooling device changes the flowing speed of the air through the fan and guides cold air in the external environment into the air-cooled air pipe or the air pipeline; introduce cold air the inside position that generates heat of circuit breaker utilizes the cold air replacement in the external environment the inside hot-air of circuit breaker, again when the heat of the inside position that generates heat of circuit breaker does not radiate all around, discover in advance and carry out effective cooling.
Examples
As shown in fig. 8, two ends of the air duct tube 31 are respectively mounted on the mounting hole on the side surface of the main air duct 32 and the mounting hole of the upper left air duct 34, the mounting hole on the side surface of the main air duct 32 and the mounting hole of the lower left air duct 35, the mounting hole on the side surface of the main air duct 32 and the mounting hole of the upper right air duct 36, the mounting hole on the side surface of the main air duct 32 and the mounting hole of the lower right air duct 37, or the mounting hole on the side surface of the main air duct 32 and the mounting hole of the middle air duct 38. The specific structure of the main air duct 32, the left upper air duct 34, the left lower air duct 35, the right upper air duct 36, the right lower air duct 37 and the middle air duct 38 is shown in fig. 9.
As shown in fig. 1, the conductive system 2 is arranged and embedded inside a housing 1 of the circuit breaker, and the air-cooled air duct 3 is embedded in the housing 1;
the control module is also connected with a controller of the circuit breaker and used for collecting temperature alarm signals in the controller, and when the control module receives the alarm signals, the controller controls the cooling intensity of the cooling device to reach the highest value and adjusts the opening time of the cooling device.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained:
the invention discloses an air-cooled air pipe, a ventilation shell and a multipoint cooling device for a circuit breaker, wherein cold air in an external environment is directly introduced into a heating position inside the circuit breaker by utilizing a ventilation pipeline, and is cooled in advance when the heating heat of the circuit breaker is not radiated to the periphery, so that the circuit breaker is cooled more effectively and rapidly; the heating position and the heating heat are timely found by monitoring of the control system, and the circuit breaker is appropriately cooled by controlling the cooling strength of the cooling device, so that energy can be saved, and accurate cooling can be realized; then the fan in the cooling device is utilized to accelerate the gas flowing speed in the ventilation pipeline; the invention realizes the cooling of the circuit breaker by accelerating the heat dissipation, so that the operation of the circuit breaker is more reliable and safer.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and adaptations can be made without departing from the principle of the present invention, and such modifications and adaptations should also be considered to be within the scope of the present invention.
Claims (5)
1. A multipoint cooling system for a circuit breaker comprising a control system, a temperature reducing device, a ventilated casing and a gas duct, wherein,
the ventilation shell is of an integral structure and is arranged outside a conductive system of the circuit breaker; the inner side of the ventilation shell is provided with a conductive system mounting position and a gas pipeline; the conductive system mounting position is tightly sleeved outside the conductive system; the gas pipeline is arranged around the conductive system installation position, one side of the ventilation shell is communicated with the external environment, the inner side of the ventilation shell is communicated with the conductive system installation position, and the gas pipeline communicated with the outside is arranged on the upper side and the lower side of the ventilation shell;
the control system comprises a control module and a collecting mutual inductance module, the collecting mutual inductance module is connected with the control module, the control module is connected with the cooling device, and the collecting mutual inductance module is connected with a controller of the circuit breaker;
the control system controls the starting, stopping and cooling intensity of the cooling device; the full load rate of the current of the main loop of the circuit breaker, the temperature alarm signal of the circuit breaker and the temperature of the conductive element of the circuit breaker are collected through the collecting mutual inductance module and transmitted to the control module; the control module controls the working state of the cooling device and adjusts the cooling intensity of the cooling device according to the full load rate of the main loop current and the temperature alarm signal;
the cooling device provides a fan for cooling, cold air outside the circuit breaker is transmitted to the interior of the circuit breaker through the fan, and cooling is realized through ventilation of the circuit breaker;
the gas pipeline comprises an air pipe barrel, a main air pipe and an air outlet pipe; one end of the main air pipe is provided with an air inlet, and the side surface of the main air pipe is provided with an installation opening of the air pipe barrel; the wind pipe barrel is provided with more than one wind pipe barrel, the interface end of the wind pipe barrel is arranged at the mounting port of the main wind pipe, the wind outlet of the wind pipe barrel is arranged at one side of a bridge-type contact system of the circuit breaker and is communicated to the connecting part and the lap joint part between the conductive elements, and the wind pipe barrel comprises a connecting part of a fixed contact and a bridge-type contact piece, a connecting part of the bridge-type contact piece and an external bus bar and a connecting part of a movable contact and the bridge-type contact piece; the air outlet pipe is arranged on the other side of the bridge type contact system; the low-temperature air enters the gas pipeline through the air inlet of the main air pipe, the low-temperature air is introduced into the first heating position and the maximum heating position of the circuit breaker through the air pipe barrel, the low-temperature air is cooled in advance when heat emitted by the circuit breaker is not diffused, and the hot air generated by the bridge type contact system is pushed by the low-temperature air in the air pipe barrel and is led out from the air outlet pipe.
2. The multipoint cooling system for a circuit breaker according to claim 1, wherein the duct barrel is mounted with an upper left duct, a lower right duct, a middle duct, a lower left duct and an upper right duct, respectively.
3. The multipoint cooling system for a circuit breaker according to claim 2, wherein the air outlet of the lower left air duct is introduced to the outside of the bridge-type contact system where the movable contact and the bridge-type contact are connected; the air outlet of the upper left air pipe is led into the outer side of the joint of the fixed contact and the bridge-type contact blade in the bridge-type contact system; the air outlet of the upper right air pipe is led into the outer side of the joint of the upper bridge-shaped contact blade and the external bus bar in the bridge-shaped contact system; and the air outlet of the right lower air pipe is led into the outer side of the joint of the bridge-shaped contact blade and the external busbar, which is positioned below the bridge-shaped contact system.
4. The multipoint cooling system for a circuit breaker according to claim 1, wherein the ventilation housing is made of bakelite.
5. The multipoint cooling system for a circuit breaker according to claim 1, wherein an air outlet duct is installed at an edge position of the circuit breaker housing, and hot air inside the circuit breaker is forcibly guided out through the air outlet duct to dissipate heat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110255105.1A CN113053682B (en) | 2021-03-09 | 2021-03-09 | Air-cooled air pipe, ventilation housing and multipoint cooling device for circuit breaker |
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| CN202110255105.1A CN113053682B (en) | 2021-03-09 | 2021-03-09 | Air-cooled air pipe, ventilation housing and multipoint cooling device for circuit breaker |
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| CN114242489A (en) * | 2021-11-01 | 2022-03-25 | 中国长江三峡集团有限公司 | Distributed modulation type forced air cooling method of solid-state direct-current circuit breaker |
| CN114156105B (en) * | 2021-11-16 | 2024-03-08 | 扬州鹿洵智能科技有限公司 | Load immersed leakage protection switch |
| CN114758931B (en) * | 2022-04-24 | 2024-02-23 | 北京华盛中能科技有限公司 | Circuit breaker with exhaust cooling system |
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|---|---|---|---|---|
| CN109935501A (en) * | 2019-03-29 | 2019-06-25 | 厦门宏发开关设备有限公司 | A kind of frame circuit breaker with heat sinking function |
| CN211480688U (en) * | 2020-04-09 | 2020-09-11 | 山东中安电力科技有限公司 | Environment self-adaptive high-current switch cabinet ventilation and heat dissipation structure |
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| Publication number | Publication date |
|---|---|
| CN113053682A (en) | 2021-06-29 |
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