CN219144057U - Vacuum circuit breaker - Google Patents
Vacuum circuit breaker Download PDFInfo
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- CN219144057U CN219144057U CN202320048483.7U CN202320048483U CN219144057U CN 219144057 U CN219144057 U CN 219144057U CN 202320048483 U CN202320048483 U CN 202320048483U CN 219144057 U CN219144057 U CN 219144057U
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Abstract
The utility model relates to the technical field of power switch control, and aims to provide a vacuum circuit breaker. The vacuum circuit breaker is arranged outdoors, can avoid lightning strike, and can simultaneously meet the protection requirement and the measurement precision requirement of a circuit. The vacuum circuit breaker includes: the control terminal, the breaker body and the lightning protection component; the breaker body comprises a double-winding voltage transformer, a primary winding of the double-winding voltage transformer is connected with the measuring equipment, a secondary winding of the double-winding voltage transformer is connected with the control terminal, and the voltage ratio of the primary winding is smaller than that of the secondary winding; the lightning protection component is connected with the breaker body. The utility model solves the problems that in the prior art, the vacuum circuit breaker arranged outdoors has the risk of damage caused by lightning strike, and the voltage ratio of the primary winding and the secondary winding of the voltage transformer is the same, so that the measurement precision is poor and the measurement requirement cannot be met.
Description
Technical Field
The utility model relates to the technical field of power switch control, in particular to a vacuum circuit breaker.
Background
The vacuum circuit breaker is a main electrical component in an outdoor high-voltage power transmission and distribution line and is used for closing load current, overload current and short-circuit current in a power system. The vacuum circuit breaker is suitable for power systems such as transformer substations, urban and rural power grids, industrial and mining enterprises and the like, and plays a role in protecting and controlling high-voltage power transmission and distribution lines.
The outdoor vacuum circuit breaker is mostly arranged on a telegraph pole and is connected into an outdoor high-voltage power transmission and distribution line through the wire connection erected on the telegraph pole. Because vacuum circuit breaker is in outdoor environment, operational environment receives weather factor influence great, when thunderstorm weather, there is the risk of suffering the thunderbolt and damaging to vacuum circuit breaker's installation height is higher, is inconvenient for maintenance change. In addition, the high voltage of the outdoor high-voltage power transmission and distribution line can be reduced through the voltage transformer so as to meet the low-voltage use requirements of the measuring equipment and the control terminal, wherein the parameter of the voltage ratio of the winding is the ratio of the voltage input to the voltage sensor by the high-voltage power transmission and distribution line to the voltage output to the measuring equipment or the control terminal by the voltage sensor. The voltage ratio of a primary winding for measuring data such as voltage in a line and a secondary winding for protecting a control terminal in the existing voltage transformer is the same, so that the measured voltage range is large, the measured data precision is poor, and the measurement requirement cannot be met.
Disclosure of Invention
Therefore, the technical problem to be solved by the utility model is to overcome the defects that in the prior art, the vacuum circuit breaker installed outdoors is damaged due to lightning strike, and the voltage ratio of the primary winding to the secondary winding of the voltage transformer is the same, so that the measuring range is large, the measuring precision is poor, and the measuring requirement cannot be met, thereby providing the vacuum circuit breaker which can avoid lightning strike and simultaneously meet the protection requirement and the measuring precision requirement of a circuit.
In order to solve the above problems, the present utility model provides a vacuum circuit breaker including:
a control terminal;
the circuit breaker body comprises a double-winding voltage transformer, a primary winding of the double-winding voltage transformer is connected with the measuring equipment, a secondary winding of the double-winding voltage transformer is connected with the control terminal, and the voltage ratio of the primary winding is smaller than that of the secondary winding;
and the lightning protection assembly is connected with the breaker body.
Optionally, the voltage ratio of the primary winding is 10:0.1, and the voltage ratio of the secondary winding is 10:0.22.
Optionally, the lightning protection assembly includes: the lightning arrester is arranged on the mounting seat, one end of the high-voltage lead wire is connected with the lightning arrester, and the other end of the high-voltage lead wire is connected with the circuit breaker body.
Optionally, the mount pad includes connecting portion and installation department, the one end of connecting portion with circuit breaker body fixed connection, the other end with the installation department is connected, just connecting portion with contained angle between the installation department is the obtuse angle.
Optionally, the circuit breaker body includes: the box, three insulating part and three current transformer, the side of box is provided with aviation socket, three the insulating part interval set up in the top surface of box, every current transformer with one the insulating part corresponds to be connected.
Optionally, the current transformer is a double-winding current transformer.
Optionally, the top of insulating part is provided with incoming wire terminal, just have the cavity in the insulating part, explosion chamber, outgoing wire terminal and operating device have been set gradually from top to bottom in the cavity.
Optionally, the same side of the box body provided with the aviation socket is provided with an insulation pull rod, and the insulation pull rod is connected with the operating mechanism in the insulation piece.
Optionally, the control terminal is connected with the aviation socket through an aviation plug.
Optionally, the control terminal includes: the cabinet body and the wireless communication module, the 485 interface, the Ethernet communication interface and the power supply module which are arranged in the cabinet body.
The utility model has the following advantages:
1. the vacuum circuit breaker provided by the utility model comprises the control terminal, the circuit breaker body and the lightning protection assembly, wherein the damage of the circuit breaker body caused by lightning stroke can be avoided through the lightning protection assembly, so that the vacuum circuit breaker can adapt to severe weather conditions. In addition, the voltage ratio of the primary winding and the secondary winding of the double-winding voltage transformer in the breaker body is different, the secondary winding is connected with the control terminal, the voltage input to the control terminal after the voltage is reduced by the secondary winding is 220V, the voltage ratio of the primary winding is smaller than that of the secondary winding, namely the voltage input to the measuring equipment after the voltage is reduced by the primary winding is smaller than 220V, further the measuring range is smaller, and the measured data is more accurate.
2. According to the vacuum circuit breaker provided by the utility model, the aviation socket is arranged on the box body in the circuit breaker body, and the aviation socket is connected with the control terminal, so that the product standardization is realized, and the circuit breaker can be waterproof and open-circuit-proof. The safety performance of the product is improved, the product is not easy to damage, the service life is longer, and the interchangeability of the product is improved.
3. The control terminal of the vacuum circuit breaker provided by the utility model comprises a cabinet body, and a wireless communication module, a 485 interface, an Ethernet communication interface and a power supply module which are arranged in the cabinet body. The functions of data acquisition, current protection, reclosing fault wave recording, remote communication, remote control operation, local remote control operation, switch state acquisition, switch state output and the like can be realized through the wireless communication module, the 485 interface and the Ethernet communication interface, so that remote signaling, remote measurement and remote control can be realized through the vacuum circuit breaker. And the vacuum circuit breaker is convenient to remotely monitor and control.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a vacuum circuit breaker (hidden control terminal and dual winding voltage transformer) of the present utility model;
FIG. 2 is a schematic top view of a vacuum interrupter (hidden control terminal and dual winding voltage transformer) of the present utility model;
fig. 3 is a cross-sectional view of a vacuum interrupter (hidden control terminal and dual winding voltage transformer) of the utility model;
FIG. 4 is a schematic diagram of a dual-winding voltage transformer in a vacuum interrupter of the utility model;
fig. 5 is a schematic view of a control terminal in the vacuum circuit breaker of the present utility model;
fig. 6 is a schematic view of an aerial plug in a vacuum circuit breaker of the present utility model.
Reference numerals illustrate:
1. a control terminal;
201. the double-winding voltage transformer comprises a double-winding voltage transformer body 202, a box body 203, an insulating piece 204, a current transformer 205, an aviation socket 206, an incoming line terminal 207, an arc extinguishing chamber 208, an outgoing line terminal 209, an operating mechanism 2010 and an insulating pull rod;
3. a lightning protection component 301, a mounting seat 3011, a connecting part 3012, a mounting part 302, a lightning arrester 303 and a high-voltage lead;
4. aviation plug.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1 to 3, the vacuum circuit breaker is a preferred embodiment of the present utility model, and the vacuum circuit breaker can be installed outdoors, so that lightning stroke can be avoided, and the requirements of protection and measurement accuracy of the circuit can be met. The device can adapt to severe weather environment, and has the advantages of higher safety performance, longer service life and high measurement accuracy.
The vacuum circuit breaker includes: the control terminal 1, the circuit breaker body and the lightning protection assembly 3, wherein the circuit breaker body is arranged on a telegraph pole and is connected with a wire erected on the telegraph pole to take electricity. As shown in fig. 4, the breaker body includes a double-winding voltage transformer 201, and high voltage of a line is reduced by a primary winding and a secondary winding of the double-winding voltage transformer 201 to secure safety of a measuring apparatus, a control terminal 1, and a worker. The primary winding of the dual-winding voltage transformer 201 is connected to a measuring device by which data such as the voltage in the line can be detected. The secondary winding of the double-winding voltage transformer 201 is connected with the control terminal 1 to supply power to the control terminal 1. The voltage ratio of the primary winding is smaller than that of the secondary winding, specifically, in this embodiment, the high voltage of the line is 10kV, the voltage ratio of the primary winding is 10:0.1, the high voltage of 10kV can be reduced to 100V through the primary winding, the accuracy of the primary winding is 0.5 level, that is, the measurement error is ±0.5%, and the measurement accuracy is higher. The voltage ratio of the secondary winding is 10:0.22, the high voltage of 10kV can be reduced to 220V through the secondary winding, the accuracy of the secondary winding is 3P level, namely the error of the voltage is +/-3 percent, and the secondary winding mainly plays a role in protection, so that the high voltage is converted into 220V standard voltage for the control terminal 1 to use, and the accuracy is not required to be too high.
Further, the circuit breaker body further includes: the box 202, three insulators 203 and three current transformers 204, the side of the box 202 is provided with an aviation socket 205, and the same side provided with the aviation socket 205 is provided with an insulating pull rod 2010. In addition, the same side provided with the aviation socket 205 is also provided with an energy storage handle and an opening and closing indicating mechanism.
Three insulating members 203 are disposed on the top surface of the box 202 at intervals, and each current transformer 204 is correspondingly connected with one insulating member 203. In this embodiment, the current transformer 204 is preferably a dual-winding current transformer.
The top of the insulating member 203 is provided with a wire inlet terminal 206 for connection with a wire, the insulating member 203 is provided with a hollow cavity, and the hollow cavity is internally provided with an arc extinguishing chamber 207, a wire outlet terminal 208 and an operating mechanism 209 from top to bottom. The arc extinguishing chamber 207 is mainly used for extinguishing an arc generated during breaking, the wire outlet terminal 208 is connected with the current transformer 204, the operating mechanism 209 is connected with the insulating pull rod 2010, and the operating mechanism 209 can be driven to act by operating the insulating pull rod 2010 to change the opening or closing state of the breaker body.
The lightning protection assembly 3 is connected with the breaker body, so that the breaker body can be protected from lightning. Further, as shown in fig. 5, the lightning protection assembly 3 includes: the lightning arrester comprises a mounting seat 301, a lightning arrester 302 and a high-voltage lead 303, wherein the mounting seat 301 is fixedly connected with a circuit breaker body, the lightning arrester 302 is arranged on the mounting seat 301, one end of the high-voltage lead 303 is connected with the lightning arrester 302, and the other end of the high-voltage lead 303 is connected with the circuit breaker body. Specifically, in this embodiment, the mounting base 301 includes a connection portion 3011 and a mounting portion 3012, one end of the connection portion 3011 is fixedly connected to the circuit breaker body, the other end is connected to the mounting portion 3012, an included angle between the connection portion 3011 and the mounting portion 3012 is an obtuse angle, the lightning arrester 302 is disposed on the mounting portion 3012, and a top end of the lightning arrester 302 is connected to the incoming terminal 206 of the circuit breaker body through the high voltage lead 303. The lightning protection assembly 3 is arranged to protect the breaker body from lightning, so that the breaker body can normally work without being damaged in thunderstorm weather, the safety performance of the breaker body is improved, and the maintenance times are reduced.
The control terminal 1 is connected to an aerial socket 205 on the breaker body by an aerial plug 4. Specifically, the aviation plug 4 in this embodiment is a twenty-six-core military aviation plug, which includes three plugs, one of which is connected to the aviation socket 205, one of which is connected to the control terminal 1, and one of which is connected to the secondary winding of the current transformer 204. The standardization of the control terminal 1 and the breaker body connector is realized by arranging the aviation socket 205 and the aviation plug 4, and the aviation socket 205 and the aviation plug 4 can be waterproof and open-circuit-proof, so that the service performance of the product is improved, and the failure is not easy to happen.
Further, the control terminal 1 includes: the cabinet body and the wireless communication module, the 485 interface, the Ethernet communication interface and the power supply module which are arranged in the cabinet body. As shown in fig. 6, the cabinet body of the control terminal 1 is a square cabinet, and the power supply module arranged inside is preferably a rechargeable lithium battery, and is connected with the power supply module through the secondary winding of the double-winding voltage transformer 201 to supply power to the control terminal. The data interaction is realized through the wireless communication module, the 485 interface and the Ethernet communication interface, so as to realize the functions of three remote control (remote signaling, to-be-tested and remote control). Under the action of the control terminal 1, data acquisition, current protection, reclosing fault wave recording, remote communication, remote control operation, local remote control operation, switch state acquisition, switch state output and the like can be performed. The line state can be monitored remotely through the mobile phone, the computer and other equipment, and the line state can be monitored conveniently, and the line state can be found and maintained in time when faults occur.
The following describes the operation of the vacuum circuit breaker according to the present embodiment as follows:
the circuit breaker body is fixed on a telegraph pole, the control terminal 1 is also fixed on the telegraph pole, and the circuit breaker body and the control terminal 1 are connected through the aviation plug 4 and the aviation socket 205. The installation height of the breaker body is high, near the top end of the telegraph pole, while the installation height of the control terminal 1 is low, about 3 meters from the ground. The circuit breaker body is connected into a high-voltage line, specifically, a wire inlet terminal 206 at the top end of an insulating piece 203 is connected with the high-voltage line, data measurement is performed through a double-winding voltage transformer 201 and a current transformer 204, and the data are transmitted to remote equipment such as a mobile phone, a computer and the like through a control terminal 1.
Meanwhile, the mounting seat 301 in the lightning protection assembly 3 is fixedly connected with the breaker body, the lightning arrester 302 is mounted on the mounting seat 301, and the lightning arrester 302 is connected with the wire inlet terminal 206 at the top end of the insulating piece 203 through the high-voltage lead 303. The lightning protection assembly 3 protects the breaker body from lightning strike damage, and improves the safety performance of the vacuum breaker.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (10)
1. A vacuum circuit breaker, comprising:
a control terminal (1);
the circuit breaker comprises a circuit breaker body, wherein the circuit breaker body comprises a double-winding voltage transformer (201), a primary winding of the double-winding voltage transformer (201) is connected with measurement equipment, a secondary winding of the double-winding voltage transformer (201) is connected with the control terminal (1), and the voltage ratio of the primary winding is smaller than that of the secondary winding;
and the lightning protection assembly (3) is connected with the breaker body.
2. The vacuum interrupter of claim 1, wherein the primary winding has a voltage ratio of 10:0.1 and the secondary winding has a voltage ratio of 10:0.22.
3. Vacuum circuit breaker according to claim 1, characterized in that the lightning protection assembly (3) comprises: mount pad (301), arrester (302) and high voltage lead (303), mount pad (301) with circuit breaker body fixed connection, arrester (302) set up in on mount pad (301), one end of high voltage lead (303) with arrester (302) are connected, the other end with circuit breaker body coupling.
4. A vacuum circuit breaker according to claim 3, characterized in that the mounting base (301) comprises a connecting portion (3011) and a mounting portion (3012), one end of the connecting portion (3011) is fixedly connected to the circuit breaker body, the other end is connected to the mounting portion (3012), and an included angle between the connecting portion (3011) and the mounting portion (3012) is an obtuse angle.
5. The vacuum circuit breaker of claim 1, wherein the circuit breaker body further comprises: the intelligent box comprises a box body (202), three insulating pieces (203) and three current transformers (204), wherein aviation sockets (205) are arranged on the side face of the box body (202), the three insulating pieces (203) are arranged on the top face of the box body (202) at intervals, and each current transformer (204) is correspondingly connected with one insulating piece (203).
6. The vacuum interrupter of claim 5, wherein the current transformer (204) is a dual winding current transformer.
7. The vacuum circuit breaker according to claim 5, wherein the top end of the insulating member (203) is provided with an incoming wire terminal (206), and the insulating member (203) is internally provided with a hollow cavity, and the hollow cavity is internally provided with an arc extinguishing chamber (207), an outgoing wire terminal (208) and an operating mechanism (209) in sequence from top to bottom.
8. Vacuum circuit breaker according to claim 7, characterized in that the same side of the box (202) as the aerial socket (205) is provided with an insulating pull rod (2010), the insulating pull rod (2010) being connected with the operating mechanism (209) inside the insulating member (203).
9. Vacuum circuit breaker according to claim 5, characterized in that the control terminal (1) is connected with the aerial socket (205) by means of an aerial plug (4).
10. Vacuum circuit breaker according to any of claims 1-9, characterized in that the control terminal (1) comprises: the cabinet body and the wireless communication module, the 485 interface, the Ethernet communication interface and the power supply module which are arranged in the cabinet body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202320048483.7U CN219144057U (en) | 2023-01-06 | 2023-01-06 | Vacuum circuit breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202320048483.7U CN219144057U (en) | 2023-01-06 | 2023-01-06 | Vacuum circuit breaker |
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Publication Number | Publication Date |
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CN219144057U true CN219144057U (en) | 2023-06-06 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN202320048483.7U Active CN219144057U (en) | 2023-01-06 | 2023-01-06 | Vacuum circuit breaker |
Country Status (1)
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CN (1) | CN219144057U (en) |
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2023
- 2023-01-06 CN CN202320048483.7U patent/CN219144057U/en active Active
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