High-voltage circuit with double main breakers and high-voltage equipment box

Abstract

The invention provides a high-voltage circuit with double main breakers and a high-voltage equipment box, and relates to the technical field of locomotive high-voltage circuit control. The circuit comprises a first high-voltage cable, a second high-voltage cable, a third high-voltage cable, a first circuit breaker and a second circuit breaker, one end of the first high-voltage cable is connected with the pantograph, and the other end of the first high-voltage cable is connected with a first contact of the first circuit breaker; one end of the second high-voltage cable is connected with a second contact of the first circuit breaker and a first contact of the second circuit breaker, and the other end of the second high-voltage cable is connected with the main transformer; and one end of the third high-voltage cable is connected with a second contact of the second circuit breaker, and the other section is connected into a circuit of the other compartment. According to the circuit, overload short-circuit protection of the circuit can be realized, normal work of other compartment circuits cannot be influenced when the circuit fails, the voltage equipment box can quickly release voltage when equipment breaks down and bursts, and air convection inside and outside the box body can also be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of locomotive high-voltage circuit control, and in particular to a high-voltage circuit and a high-voltage equipment box with a double main-break configuration. Background Art

[0002] The high-voltage isolating switch in the main circuit of the existing locomotive had air leakage and stuck / closed faults due to reasons such as air source cleanliness and solenoid valve reliability, resulting in a large workload for temporary and minor repairs of the high-voltage isolating switch. The customer proposed to use a vacuum circuit breaker instead of the high-voltage isolating switch to achieve the function of isolating the faulty circuit. The existing high-voltage equipment box is a closed space without a pressure relief and explosion-proof device. When the equipment in the high-voltage equipment box explodes, the energy cannot be released immediately. There is no air exchange device inside the box, and the cold and hot air in the equipment box cannot be exchanged by convection.

[0003] Therefore, designing a high-voltage circuit and high-voltage equipment box with a double main breaker configuration that not only meets the requirements of the double main breaker circuit configuration, but also can realize the pressure relief, explosion-proof and air exchange functions of the equipment is an urgent problem to be solved. Summary of the invention

[0004] The purpose of the present invention is to provide a high-voltage circuit with a double main-breaker configuration, which can realize overload and short-circuit protection of the circuit by setting two circuit breakers on the main high-voltage cable connected to other carriages, and can also ensure that the normal operation of other carriage circuits is not affected when the circuit fails. Compared with only one circuit breaker, the circuit work between different carriages has a certain degree of independence, which can better realize the power supply service and improve the quality of locomotive power service.

[0005] The present invention also aims to provide a high-voltage equipment box with a double main-break configuration, which can achieve a certain degree of sealing and protection of the equipment under normal operation by opening an explosion-proof port blocked by an explosion-proof valve assembly on the box body, and on the other hand, can quickly open the explosion-proof port to release pressure when the equipment fails and explodes, avoiding the accumulation of energy in the box body to produce a greater explosion hazard. At the same time, a breathing port is opened on the box body, which can effectively realize air convection inside and outside the box body, ensure a certain degree of regulation of the ambient temperature inside the box body, and ensure the normal operation of each device in the box body.

[0006] In the first aspect, the present invention provides a high-voltage circuit with a double main-breaker configuration, comprising: a first high-voltage cable, a second high-voltage cable, a third high-voltage cable, a first circuit breaker and a second circuit breaker; one end of the first high-voltage cable is connected to the pantograph, and the other end is connected to the first contact of the first circuit breaker; one end of the second high-voltage cable is respectively connected to the second contact of the first circuit breaker and the first contact of the second circuit breaker, and the other end is connected to the main transformer; one end of the third high-voltage cable is connected to the second contact of the second circuit breaker, and the other end is connected to the circuit of another car.

[0007] In the present invention, the circuit can realize overload short circuit protection of the circuit by setting two circuit breakers on the main high-voltage cable connected to other carriages, and can also ensure that the normal operation of the circuits in other carriages is not affected when the circuit fails. Compared with only one circuit breaker, the circuit work between different carriages has a certain degree of independence, which can better realize the power supply service and improve the quality of locomotive power service.

[0008] As a possible implementation manner, a voltage transformer is further included, one end of the voltage transformer is connected to the first contact of the first circuit breaker, and the other end is grounded.

[0009] In the present invention, the voltage transformer can detect the voltage introduced by the first high-voltage cable from the pantograph, thereby realizing real-time monitoring of the input power voltage.

[0010] As a possible implementation, a grounding switch is further included, one end of the grounding switch short-circuits the first contact and the second contact of the first circuit breaker, and the other end of the grounding switch is grounded.

[0011] In the present invention, the grounding switch can ground the high-voltage circuit when the first circuit breaker is inspected and repaired, thereby ensuring the operating safety of the operating personnel.

[0012] As a possible implementation, a lightning arrester is further included, one end of the lightning arrester is connected to the first contact of the second circuit breaker, and the other end of the lightning arrester is grounded.

[0013] In the present invention, the lightning arrester can guide the instantaneous high-voltage current of lightning to be released, thereby avoiding damage to the circuit and ensuring the normal operation of the circuit.

[0014] In a second aspect, the present invention provides a high-voltage equipment box with a double main breaker configuration. The system adopts the high-voltage circuit with a double main breaker configuration as described in the first aspect, and includes: a box body, a double circuit breaker high-voltage circuit component, and an explosion-proof valve component; the double circuit breaker is arranged in the box body, and an explosion-proof port and a breathing port are respectively opened on the box body, and the explosion-proof valve component is arranged on the explosion-proof port to realize the opening and closing of the explosion-proof port.

[0015] In the present invention, an explosion-proof port blocked by an explosion-proof valve assembly is provided on the box body, which can achieve a certain degree of sealing and protection of the equipment when the equipment is working normally. On the other hand, the explosion-proof port can be quickly opened to release pressure when the equipment fails and explodes, so as to avoid the accumulation of energy in the box body and cause a greater explosion hazard. At the same time, a breathing port is provided on the box body, which can effectively realize air convection inside and outside the box body, ensure a certain degree of regulation of the ambient temperature inside the box body, and ensure the normal operation of each device in the box body.

[0016] As a possible implementation, a double circuit breaker high-voltage circuit assembly includes a first circuit breaker, a second circuit breaker, a voltage transformer, a grounding switch, a lightning arrester, a first high-voltage cable, a second high-voltage cable and a third high-voltage cable; a first cable port and a third cable port are respectively provided on opposite sides of the box, and a second cable port is provided on the bottom of the box; one end of the first high-voltage cable passes through the first cable port and is connected to the first contact of the first circuit breaker and the voltage transformer; one end of the second high-voltage cable passes through the second cable port and is respectively connected to the second contact of the first circuit breaker, the first contact of the second circuit breaker and one end of the lightning arrester; one end of the third high-voltage cable passes through the third cable port and is connected to the second circuit breaker; the first circuit breaker and the second circuit breaker are located in the box and are relatively fixed to the side of the box; the grounding switch short-circuits the first circuit breaker and is fixed on the box and grounded; the lightning arrester is fixed on the box and grounded; the grounding switch and the lightning arrester are located on opposite sides of the box, and the voltage transformer and the grounding switch are located on the same side of the box.

[0017] In the present invention, different electrical energy devices in the box are reasonably arranged. On the one hand, the size of the box space can be reasonably arranged so that the size of the box can be reduced as much as possible to reduce the cost and reduce the weight of the box. On the other hand, the positions of various devices are reasonably spaced and arranged so that each device has a reasonable position, ensuring their normal operation and being independent of each other without affecting each other.

[0018] As a possible implementation manner, the explosion-proof opening is located on a side wall of the box body close to the grounding switch.

[0019] In the present invention, since the first circuit breaker is a main component in the circuit, the explosion-proof opening can be relatively close to the first circuit breaker to more quickly release the explosion pressure caused by the failure of the first circuit breaker.

[0020] As a possible implementation method, the explosion-proof valve assembly includes a pressure spring, a fixed seat and a sealing cover; the fixed seat is arranged in a box body; one end of the pressure spring is connected to the fixed seat, and the other end is connected to the sealing cover; the sealing cover seals the explosion-proof port from the outside and is connected to the pressure spring, and is tightened on the explosion-proof port by the pressure spring.

[0021] In the present invention, the explosion-proof valve assembly seals the sealing cover on the explosion-proof port through spring tension. The spring tension can be set as needed to ensure effective sealing of the explosion-proof port during normal operation, and can also push open the sealing cover plate to release pressure when an explosion occurs in the box.

[0022] As a possible implementation, there are two breathing ports, which are respectively located on the side walls of the box body where the first cable port and the third cable port are opened.

[0023] In the present invention, the breathing ports are relatively opened, so that the rapid circulation and exchange of air in the box can be achieved, thereby achieving a better air exchange effect and ensuring the pressure balance inside and outside the box.

[0024] As a possible implementation, a filter grid is installed on the breathing port.

[0025] In the present invention, a filter grid is arranged on the breathing port, which can filter the air to a certain extent, thereby preventing excessive dust accumulation in the box from affecting the operation of the device.

[0026] The beneficial effects of a high-voltage circuit and a high-voltage equipment box with a double main break configuration provided by the present invention are as follows:

[0027] This circuit can achieve overload short-circuit protection for the circuit by setting two circuit breakers on the main high-voltage cable connected to other carriages, and can also ensure that the normal operation of other carriage circuits is not affected when the circuit fails. Compared with only one circuit breaker, the circuit work between different carriages has a certain degree of independence, which can better realize power supply services and improve the quality of locomotive power services.

[0028] The equipment box has an explosion-proof port sealed by an explosion-proof valve assembly on the box body, which can achieve a certain degree of sealing and protection for the equipment when the equipment is working normally. On the other hand, the explosion-proof port can be quickly opened to release pressure when the equipment fails and explodes, avoiding the accumulation of energy in the box to cause a greater explosion hazard. At the same time, a breathing port is opened on the box body, which can effectively realize air convection inside and outside the box, ensure a certain degree of regulation of the ambient temperature inside the box, and ensure the normal operation of each device in the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of a high voltage circuit with a double main circuit breaker configuration provided by an embodiment of the present invention;

[0031] Figure 2 A schematic diagram from a first perspective of a high-voltage equipment box with dual main breakers provided in an embodiment of the present invention;

[0032] Figure 3 A second perspective schematic diagram of a high-voltage equipment box with double main breakers provided in an embodiment of the present invention;

[0033] Figure 4A schematic diagram from a third perspective of a high-voltage equipment box with double main breakers provided in an embodiment of the present invention.

[0034] Label:

[0035] 1. First high-voltage cable; 2. Box; 3. Voltage transformer; 4. First circuit breaker; 5. Grounding switch; 6. Third high-voltage cable; 7. Second circuit breaker; 8. Lightning arrester; 9. Explosion-proof port; 10. Breathing port; 11. Second high-voltage cable. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] The high-voltage isolating switch in the main circuit of the existing locomotive had air leakage and stuck / closed faults due to reasons such as air source cleanliness and solenoid valve reliability, resulting in a large workload for temporary and minor repairs of the high-voltage isolating switch. The customer proposed to use a vacuum circuit breaker instead of the high-voltage isolating switch to achieve the function of isolating the faulty circuit. The existing high-voltage equipment box is a closed space without a pressure relief and explosion-proof device. When the equipment in the high-voltage equipment box explodes, the energy cannot be released immediately. There is no air exchange device inside the box, and the cold and hot air in the equipment box cannot be exchanged by convection.

[0038] refer to Figure 1 The embodiment of the present invention provides a high-voltage circuit with a dual main-breaker configuration. By setting two circuit breakers on the main high-voltage cable connected to other carriages, the circuit can achieve overload and short-circuit protection for the circuit, and can also ensure that the normal operation of other carriage circuits is not affected when the circuit fails. Compared with only one circuit breaker, the circuit work between different carriages has a certain degree of independence, which can better realize the power supply service and improve the quality of locomotive power service.

[0039] The circuit includes a first high-voltage cable, a second high-voltage cable, a third high-voltage cable, a first circuit breaker and a second circuit breaker; one end of the first high-voltage cable is connected to the pantograph, and the other end is connected to the first contact of the first circuit breaker; one end of the second high-voltage cable is respectively connected to the second contact of the first circuit breaker and the first contact of the second circuit breaker, and the other end is connected to the main transformer; one end of the third high-voltage cable is connected to the second contact of the second circuit breaker, and the other end is connected to the circuit of another carriage.

[0040] The device further includes a voltage transformer, one end of which is connected to the first contact of the first circuit breaker and the other end is grounded. The voltage transformer can detect the voltage introduced by the first high-voltage cable from the pantograph to realize real-time monitoring of the input power voltage.

[0041] The device also includes a grounding switch, one end of which short-circuits the first contact and the second contact of the first circuit breaker, and the other end of which is grounded. The grounding switch can ground the high-voltage circuit when the first circuit breaker is inspected and repaired to ensure the safety of the operator.

[0042] The circuit breaker further comprises a lightning arrester, one end of which is connected to the first contact of the second circuit breaker and the other end is grounded. The lightning arrester can guide the instantaneous high voltage current of lightning to be released, avoid damage to the circuit, and ensure the normal operation of the circuit.

[0043] refer to Figure 2 to Figure 4 The present invention also provides a high-voltage device with a double main breaker configuration. The device adopts the high-voltage circuit with the double main breaker configuration described above, including: a box body 2, a double circuit breaker high-voltage circuit assembly and an explosion-proof valve assembly; the double circuit breaker is arranged in the box body 2, and the box body 2 is respectively provided with an explosion-proof port 9 and a breathing port 10, and the explosion-proof valve assembly is arranged on the explosion-proof port 9 to realize the opening and closing of the explosion-proof port 9.

[0044] The double circuit breaker high-voltage circuit assembly includes a first circuit breaker 4, a second circuit breaker 7, a voltage transformer 3, a grounding switch 5, a lightning arrester 8, a first high-voltage cable 1, a second high-voltage cable 11, and a third high-voltage cable 6; the first cable port and the third cable port are respectively provided on the opposite sides of the box body 2, and the second cable port is provided on the bottom surface of the box body 2; one end of the first high-voltage cable 1 passes through the first cable port and is connected to the first contact of the first circuit breaker 4 and the voltage transformer 3; one end of the second high-voltage cable 11 passes through the second cable port and is respectively connected to the first The second contact of the circuit breaker 4, the first contact of the second circuit breaker 7 and one end of the lightning arrester 8 are connected; one end of the third high-voltage cable 6 passes through the third cable port and is connected to the second circuit breaker 7; the first circuit breaker 4 and the second circuit breaker 7 are located in the box and are relatively fixed to the side of the box 2; the grounding switch 5 short-circuit the first circuit breaker 4 and is fixed on the box 2 and grounded; the lightning arrester 8 is fixed on the box 2 and grounded; the grounding switch 5 and the lightning arrester 8 are located on opposite sides of the box 2, and the voltage transformer 3 and the grounding switch 5 are located on the same side of the box 2.

[0045] Reasonable arrangement of different electrical devices in the box 2 can, on the one hand, achieve a reasonable arrangement of the space size of the box 2, so that the size of the box 2 can be reduced as much as possible, thereby reducing the cost and reducing the weight of the box 2. On the other hand, reasonable spacing and arrangement of the positions of various devices make each device have a reasonable position, ensuring their normal operation and independence without affecting each other.

[0046] The explosion-proof opening 9 is located on the side wall of the box body 2 near the grounding switch 5. Since the first circuit breaker 4 is a main component in the circuit, the explosion-proof opening 9 can be relatively close to the first circuit breaker 4 to release the explosion pressure caused by the failure of the first circuit breaker 4 more quickly.

[0047] The explosion-proof valve assembly includes a pressure spring, a fixing seat and a sealing cover; the fixing seat is arranged in the box body 2; one end of the pressure spring is connected to the fixing seat, and the other end is connected to the sealing cover; the sealing cover seals the explosion-proof port 9 from the outside, is connected to the pressure spring, and is tightened on the explosion-proof port 9 by the pressure spring. The explosion-proof valve assembly seals the sealing cover on the explosion-proof port 9 by the spring tension, and the spring tension can be set as needed to ensure that the explosion-proof port 9 is effectively sealed during normal operation, and can also push the sealing cover plate to release pressure when an explosion occurs in the box body 2.

[0048] There are two breathing ports 10, which are respectively located on the side walls of the box body 2 where the first cable port and the third cable port are opened. The breathing ports 10 are relatively opened, which can realize the rapid circulation and exchange of air in the box body 2, achieve a better air exchange effect, and ensure the pressure balance inside and outside the box body 2. A filter grid is installed on the breathing port 10. The filter grid is set on the breathing port 10, which can filter the air to a certain extent to avoid excessive dust accumulation in the box body 2 and affect the operation of the device.

[0049] The equipment box can achieve a certain degree of sealing and protection of the equipment under normal working conditions by providing an explosion-proof port 9 blocked by an explosion-proof valve assembly on the box body 2. On the other hand, the explosion-proof port 9 can be quickly opened to release pressure when the equipment fails and explodes, thereby avoiding the accumulation of energy in the box body 2 to generate a greater explosion hazard. At the same time, a breathing port 10 is provided on the box body 2, which can effectively achieve air convection inside and outside the box body 2, ensure a certain degree of regulation of the ambient temperature inside the box body 2, and ensure the normal operation of each device in the box body 2.

[0050] In summary, the high-voltage circuit and high-voltage equipment box with dual main breakers provided by the embodiments of the present invention have the following beneficial effects:

[0051] This circuit can achieve overload short circuit protection for the circuit by setting two circuit breakers on the main high-voltage cable connected to other carriages, and can also ensure that the normal operation of other carriage circuits is not affected when the circuit fails. Compared with only one circuit breaker, the circuit work between different carriages has a certain degree of independence, which can better realize the power supply service and improve the quality of locomotive power service.

[0052] The equipment box has an explosion-proof port sealed by an explosion-proof valve assembly on the box body, which can achieve a certain degree of sealing and protection for the equipment when the equipment is working normally. On the other hand, the explosion-proof port can be quickly opened to release pressure when the equipment fails and explodes, avoiding the accumulation of energy in the box to cause a greater explosion hazard. At the same time, a breathing port is opened on the box body, which can effectively realize air convection inside and outside the box, ensure a certain degree of regulation of the ambient temperature inside the box, and ensure the normal operation of each device in the box.

[0053] In the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved by means of the arrangement order of each piece of information agreed in advance (for example, specified by the protocol), thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each piece of information can also be identified and indicated uniformly to reduce the indication overhead caused by indicating the same information separately.

[0054] In addition, the specific indication method may also be various existing indication methods, such as but not limited to the above-mentioned indication methods and various combinations thereof. The specific details of the various indication methods can refer to the prior art and will not be repeated herein. As can be seen from the above, for example, when it is necessary to indicate multiple information of the same type, different indication methods may be used for different information. In the specific implementation process, the desired indication method can be selected according to specific needs. The embodiment of the present application does not limit the selected indication method. In this way, the indication method involved in the embodiment of the present application should be understood to cover various methods that can enable the party to be indicated to obtain the information to be indicated.

[0055] It should be understood that the information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in the embodiment of the present application. Among them, the sending period and / or sending time of these sub-information can be pre-defined, for example, pre-defined according to a protocol, or can be configured by the sending end device by sending configuration information to the receiving end device.

[0056] "Pre-definition" or "pre-configuration" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in the device, and the embodiments of the present application do not limit the specific implementation method. Among them, "saving" can mean saving in one or more memories. The one or more memories can be set separately or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories can also be partially set separately and partially integrated in a decoder, a processor, or a communication device. The type of memory can be any form of storage medium, which is not limited by the embodiments of the present application.

[0057] The "protocol" involved in the embodiments of the present application may refer to a protocol family in the communication field, a standard protocol with a similar protocol family frame structure, or a related protocol used in future communication systems, and the embodiments of the present application do not make specific limitations on this.

[0058] In the embodiments of the present application, descriptions such as "when...", "in the case of...", "if" and "if" all mean that the device will make corresponding processing under certain objective circumstances. It does not limit the time, nor does it require the device to have a judgment action when implementing it, nor does it mean that there are other limitations.

[0059] In the description of the embodiments of the present application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in the embodiments of the present application is only a description of the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In addition, in the description of the embodiments of the present application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or its similar expression refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple. In addition, in order to facilitate the clear description of the technical solution of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish the same or similar items with basically the same functions and effects. Those skilled in the art will appreciate that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference. At the same time, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0060] It should be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0061] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0062] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0063] It should be understood that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship. Please refer to the context for specific understanding.

[0064] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0065] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0066] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0067] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0068] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0069] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0070] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0071] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0072] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A high voltage circuit with a dual main break configuration, characterized in that: include A first high-voltage cable, a second high-voltage cable, a third high-voltage cable, a first circuit breaker and a second circuit breaker; one end of the first high-voltage cable is connected to the pantograph, and the other end is connected to the first contact of the first circuit breaker; one end of the second high-voltage cable is respectively connected to the second contact of the first circuit breaker and the first contact of the second circuit breaker, and the other end is connected to the main transformer; one end of the third high-voltage cable is connected to the second contact of the second circuit breaker, and the other end is connected to the circuit of another car.

2. The high voltage circuit with double main break configuration according to claim 1, characterized in that: It also includes a voltage transformer, one end of which is connected to the first contact of the first circuit breaker, and the other end of which is grounded.

3. The high voltage circuit with double main break configuration according to claim 2, characterized in that: It also includes a grounding switch, one end of which short-circuits the first contact and the second contact of the first circuit breaker, and the other end of which is grounded.

4. The high voltage circuit with double main break configuration according to claim 3, characterized in that: It also includes a lightning arrester, one end of which is connected to the first contact of the second circuit breaker, and the other end of which is grounded.

5. A high-voltage equipment box with double main break configuration, suitable for the high-voltage circuit with double main break configuration as claimed in any one of claims 1 to 4, characterized in that: include: A box body, a double circuit breaker high-voltage circuit component and an explosion-proof valve component; the double circuit breaker is arranged in the box body, and the box body is respectively provided with an explosion-proof port and a breathing port, and the explosion-proof valve component is arranged on the explosion-proof port to realize the opening and closing of the explosion-proof port.

6. The high-voltage equipment box with double main breakers according to claim 5, characterized in that: The double circuit breaker high-voltage circuit assembly includes a first circuit breaker, a second circuit breaker, a voltage transformer, a grounding switch, a lightning arrester, a first high-voltage cable, a second high-voltage cable, and a third high-voltage cable; The first cable opening and the third cable opening are respectively provided on opposite sides of the box, and the second cable opening is provided on the bottom surface of the box; One end of the first high-voltage cable passes through the first cable port and is connected to the first contact of the first circuit breaker and the voltage transformer; one end of the second high-voltage cable passes through the second cable port and is respectively connected to the second contact of the first circuit breaker, the first contact of the second circuit breaker and one end of the lightning arrester; one end of the third high-voltage cable passes through the third cable port and is connected to the second circuit breaker; The first circuit breaker and the second circuit breaker are located in the box and relatively fixed to the side of the box; the grounding switch short-circuits the first circuit breaker and is fixed to the box and grounded; the lightning arrester is fixed to the box and grounded; The grounding switch and the lightning arrester are located on two opposite sides of the box, and the voltage transformer and the grounding switch are located on the same side of the box.

7. The high-voltage equipment box with double main breakers according to claim 6, characterized in that: The explosion-proof opening is located on a side wall of the box body close to the grounding switch.

8. The high-voltage equipment box with double main breakers according to claim 7, characterized in that: The explosion-proof valve assembly includes a pressure spring, a fixing seat and a sealing cover; the fixing seat is arranged in a box body; one end of the pressure spring is connected to the fixing seat, and the other end is connected to the sealing cover; the sealing cover seals the explosion-proof port from the outside, and is connected to the pressure spring, and is tightened on the explosion-proof port by the pressure spring.

9. The high-voltage equipment box with double main breakers according to claim 8, characterized in that: There are two breathing ports, which are respectively located on the side wall of the box body where the first cable port and the third cable port are opened.

10. The high-voltage equipment box with double main breakers according to claim 9, characterized in that: A filter grid is installed on the breathing port.

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