Suspension type high-low voltage complete electrical cabinet

Abstract

The invention relates to the technical field of electrical cabinets, in particular to a suspension type high-low voltage complete electrical cabinet. The periphery of the cabinet body support is covered with a protection plate, the front face of the cabinet body support is a door frame plate, the surface of the door frame plate is provided with a door plate capable of being opened and closed, the door plate is locked on the door frame plate through a door lock, the two sides of the surface of the door frame plate are each provided with four sets of push rods, and every two sets of push rods are divided into one set, and one set of push rods are arranged on the upper side and one set of push rods are arranged on the lower side. And each group of push rods is used for enabling the upper touch plate and the lower touch plate to be respectively contacted with / separated from the upper joint and the lower joint. The cabinet body support of the suspension type high-low voltage complete electrical cabinet is matched with the peripheral protection plate to form stable protection, the front door frame plate has protection and installation functions, the upper door plate can be opened and closed flexibly and locked through the door lock, and sealing performance and safety are guaranteed; two sides of the door frame plate are provided with four groups of push rods which are grouped up and down, so that contact or separation of the upper contact plate and the upper connector and contact or separation of the lower contact plate and the lower connector can be accurately controlled, and flexible switching of circuit on-off is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical cabinets, in particular to a suspended high and low voltage complete electrical cabinet. Background Art

[0002] In the power transmission and distribution link of the power system, as the core equipment for power distribution, control and protection, high and low voltage complete electrical cabinets are widely used in various scenarios such as industrial plants, commercial buildings, and residential communities. With the acceleration of urbanization and the expansion of industrial production scale, higher requirements are put forward for the installation method, space utilization rate and safety performance of electrical cabinets. Suspended installation has become one of the mainstream installation forms because it can effectively save floor space and facilitate cable layout and maintenance.

[0003] However, there are still many deficiencies in the actual application of existing suspended high and low voltage complete electrical cabinets: First, the contact / disconnection mechanism between the touch plate and the connector inside the electrical cabinet is complex in design, mostly relying on manual direct operation or single transmission component drive, with poor operation convenience, and problems such as poor contact and severe wear are prone to occur during frequent switching, affecting the stability of circuit on and off, and increasing the risk of equipment failure; Second, the connection part between the touch plate and the connector lacks effective insulation protection design, and some transmission components are not made of insulating materials, prone to safety hazards such as electric leakage and short circuit, especially in the cabinet with high and low voltage mixed configuration, the safety protection short board is more prominent; Third, the installation layout rationality of electrical components inside the cabinet is insufficient, and the connection frame structure design is single, resulting in messy cable routing between electrical components, not only reducing the space utilization rate, but also bringing inconvenience to later maintenance, and at the same time affecting the heat dissipation effect, thereby shortening the service life of electrical components; Fourth, the grounding design of some suspended electrical cabinets is imperfect, and the connection reliability between the lower touch plate and the grounding wire is insufficient, unable to quickly conduct static electricity and fault current of the equipment shell or internal components, and it is difficult to meet the strict requirements of the power system for safe grounding.

[0004] In addition, the cooperation design between the door frame plate and the push rod assembly of the existing electrical cabinet is not optimized enough, and the linkage coordination of multiple push rods is poor, resulting in out-of-step actions of the upper touch plate and the lower touch plate, further affecting the operation stability of the equipment. These problems not only restrict the use performance and safety reliability of suspended high and low voltage complete electrical cabinets, but also cannot fully meet the requirements of modern power systems for efficient, safe and convenient operation of equipment. Therefore, there is an urgent need to develop a suspended high and low voltage complete electrical cabinet with reasonable structure, convenient operation, safe and reliable, and high space utilization rate to solve the defects existing in the prior art.

[0005] In view of the above defects, the designer actively conducts research and innovation in order to create a suspended high and low voltage complete electrical cabinet, making it more valuable in industry. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the purpose of this invention is to provide a suspended high and low voltage complete electrical cabinet.

[0007] The present invention discloses a suspended high and low voltage complete electrical cabinet, including a cabinet support frame, the outer perimeter of which is covered with a protective plate, the front of which is a door frame plate, the surface of which is provided with an openable and closable door panel, the door panel being locked to the door frame plate by a door lock, and four sets of push rods are provided on both sides of the surface of the door frame plate, the four sets of push rods being in pairs, the upper set being one set and the lower set being another set, each set of push rods being used to make the upper contact plate and the lower contact plate contact / disconnect with the upper connector and the lower connector respectively.

[0008] This type of suspended high and low voltage complete electrical cabinet has a cabinet support frame equipped with an outer protective plate to form a stable protective structure. Its front is equipped with a door frame plate as a protective and installation base. The door frame plate is equipped with a door panel that can be flexibly opened or closed. The door panel is reliably locked to the door frame plate through a door lock to ensure the airtightness and safety of the cabinet. Four sets of push rods are set on both sides of the door frame plate surface. The four sets of push rods are grouped in pairs according to the upper and lower positions. The upper set of push rods and the lower set of push rods respectively undertake the driving function, which can accurately control the contact or disengagement of the upper contact plate with the upper connector and the lower contact plate with the lower connector, thereby realizing the flexible switching of circuit on and off.

[0009] Furthermore, a connecting frame is welded to the middle of the cabinet support, and multiple sets of electrical components are installed on the connecting frame. Electrical components one are connected to electrical components two through a terminal block.

[0010] The connecting frame is fixed in the middle of the cabinet support by welding. This connecting frame provides a stable mounting base for electrical component one. Multiple sets of electrical component one are assembled in an orderly manner on the connecting frame. With the help of the terminal block, a reliable connection channel is built between electrical component one and electrical component two, realizing the power transmission and signal communication between the two, and ensuring the smooth operation of the internal circuit system of the electrical cabinet.

[0011] Furthermore, the tail end of the upper touch plate is movably mounted on the connecting plate at the end of the ceramic column via a shaft. The push rod on one side is movably connected to the push plate at the end of the rotating shaft 1, which is movably mounted on the cabinet bracket, via a connecting rod 1. The rotating shaft 1 is fixed with a rotating rod 1, and the end of the rotating rod 1 is movably mounted with a pull rod 1 via a shaft. The pull rod 1 is movably connected to the middle of the upper touch plate via a shaft.

[0012] The connecting plate at the end of the ceramic column provides mounting support for the upper touch plate. The tail end of the upper touch plate is movably connected to the connecting plate via a shaft to ensure flexible rotation. The push rod on one side is linked with the push plate at the end of the rotating shaft movably mounted on the cabinet bracket via a connecting rod 1. The rotating rod 1 fixed on the rotating shaft 1 can rotate synchronously with the rotating shaft 1. The end of the rotating rod 1 is equipped with a pull rod 1 via a shaft. The end of the pull rod 1 away from the rotating rod 1 is movably connected to the middle of the upper touch plate, thus forming a complete transmission structure, realizing the effective transmission of the push rod power to the touch plate to drive the upper touch plate to move.

[0013] Furthermore, the pull rod is made of insulating material.

[0014] The pull rod is made of insulating material, which can not only ensure the structural stability during the transmission process, but also play a good electrical isolation role, avoid the risk of leakage, and provide reliable protection for the safe operation of the electrical cabinet.

[0015] Furthermore, the upper contact plate consists of two arc-shaped metal plates, with the inner side of the metal plates contacting the outer wall of the upper connector to achieve an electrical path.

[0016] The upper contact plate is composed of two arc-shaped metal plates. Its unique arc structure can fit snugly with the outer wall of the upper connector. The tight contact between the inner side of the metal plate and the outer wall of the upper connector creates a stable and reliable electrical path, ensuring the smoothness and stability of current transmission and meeting the circuit conduction requirements of the electrical cabinet.

[0017] Furthermore, the tail end of the lower contact plate is fixed on the second rotating shaft. The two ends of the second rotating shaft are movably mounted on the cabinet bracket via shafts. One end of the second rotating shaft is fixedly connected to the second push plate. The end of the second push plate is movably connected to the second connecting rod via shafts. The second connecting rod is movably connected to the other push rod via shafts.

[0018] The lower touch plate is fixedly connected to the second rotating shaft. The two ends of the second rotating shaft are movably mounted on the cabinet bracket to ensure flexible rotation. One end of the second rotating shaft is firmly connected to the second push plate. The end of the second push plate is linked to the second connecting rod through the shaft. The end of the second connecting rod away from the second push plate is movably connected to the other push rod, together forming a complete transmission link to realize the effective transmission of the push rod's power, thereby driving the lower touch plate to accurately complete the corresponding action.

[0019] Furthermore, the second shaft is made of insulating material.

[0020] The second rotating shaft is made of insulating material, which can provide stable installation and rotation support for the lower contact plate, ensuring smooth and accurate transmission, and also provide reliable electrical isolation to avoid safety hazards caused by current leakage, thereby further improving the safety and stability of the electrical cabinet operation.

[0021] Furthermore, the lower contact plate on the bottom side is connected to the grounding wire via a cable.

[0022] The lower contact plate on the bottom side establishes a reliable connection with the grounding wire through a cable, which can quickly conduct away any static electricity or fault current that may be generated inside the electrical cabinet, forming a safety protection circuit. This effectively avoids equipment damage or safety risks caused by leakage, and lays a solid protective foundation for the stable and safe operation of the electrical cabinet.

[0023] By means of the above-described solution, the present invention has at least the following advantages: 1. Convenient operation and reliable transmission: Through the grouping design of four sets of push rods on both sides of the door frame plate, combined with the linkage transmission structure of the upper and lower touch plates, the precise control of the contact / disconnection between the touch plate and the connector is realized, replacing the traditional complicated manual operation or single transmission method. This not only simplifies the operation process, but also avoids problems such as poor contact and wear caused by frequent switching, ensuring the stability of circuit switching and reducing the risk of equipment failure.

[0024] 2. Excellent safety protection performance: Both the pull rod one and the rotating shaft two are made of insulating materials, which can play a reliable electrical isolation role during transmission. The structure avoids safety hazards such as leakage and short circuit, and is especially suitable for use scenarios with mixed high and low voltage configurations. At the same time, the lower contact plate on the lower side is reliably connected to the grounding wire through a cable, which can quickly conduct static electricity and fault current, forming a complete safety protection circuit and greatly improving the safety of electrical cabinet operation.

[0025] 3. Improved space utilization and ease of maintenance: The connecting frame welded in the middle of the cabinet provides a stable mounting carrier for electrical component one. Together with the terminal block, it enables orderly connection between electrical component one and electrical component two, making the layout of electrical components in the cabinet neat and the cable routing clear. This not only improves the utilization rate of the internal space of the cabinet, but also provides convenience for later inspection and maintenance. At the same time, it helps to optimize heat dissipation and extend the service life of electrical components.

[0026] 4. Stable structure and strong adaptability: The upper contact plate adopts a combination structure of two arc-shaped metal plates, which can fit tightly with the outer wall of the upper connector, ensuring stable transmission of electrical circuit; each transmission component achieves flexible linkage through shafts, connecting rods, etc., with complete transmission links and good synchronization of actions, ensuring the stability of equipment operation; the overall structural design takes into account the space advantages of suspended installation, and can be widely adapted to various power transmission and distribution scenarios such as industrial plants, commercial buildings, and residential communities, and has high industrial utilization value.

[0027] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show a certain embodiment of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the installation of the upper and lower contact plates inside the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the installation of the upper and lower contact plates inside the present invention. Figure 2 .

[0030] In the diagram: 1. Cabinet support frame; 2. Door frame panel; 3. Door panel; 4. Push rod; 5. Upper contact plate; 6. Lower contact plate; 7. Upper connector; 8. Lower connector; 9. Connecting frame; 10. Electrical component one; 11. Terminal block; 12. Electrical component two; 13. Ceramic column; 14. Connecting plate; 15. Connecting rod one; 16. Rotating shaft one; 17. Rotating rod one; 18. Pull rod one; 19. Rotating shaft two; 20. Push plate one; 21. Push plate two; 22. Connecting rod two. Detailed Implementation

[0031] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0032] See Figure 1 and Figure 2 The cabinet support 1 forms basic protection through the outer protective plate, and the door frame 2 on its front provides installation support for each component. The door panel 3 can be opened flexibly for maintenance, and when closed, it is locked to the door frame 2 by the door lock to ensure the cabinet's sealing and safety. When it is necessary to switch the circuit on and off, the four sets of push rods 4 set on both sides of the surface of the door frame 2 are operated. The four sets of push rods 4 work together in pairs, with the upper set of push rods 4 driving the upper contact plate 5 to contact or disengage from the upper connector 7, and the lower set of push rods 4 driving the lower contact plate 6 to contact or disengage from the lower connector 8, thereby completing the circuit conduction or disconnection. The push rods 4 set in groups directly control the cooperation status of the upper contact plate 5, lower contact plate 6 and corresponding upper connector 7 and lower connector 8. The operation logic is clear and the action is precise, without the need for complicated manual intervention, which effectively improves the convenience of circuit switching. The combination of the cabinet support 1 and the protective plate ensures the protection effect of the internal components, and the cooperation of the door panel 3 and the door lock further enhances the cabinet's safety. The overall structure is smoothly linked and can quickly respond to the circuit on and off requirements, reducing the risk of operational errors and equipment failure.

[0033] The cabinet support 1 is fixed to the middle by a welded connecting frame 9, forming a stable mounting base. Multiple electrical components 10 are arranged in an orderly manner on the connecting frame 9. Then, a connection channel between electrical component 10 and electrical component 12 is established through the terminal block 11, allowing the electrical energy or signal generated by electrical component 10 to be stably transmitted to electrical component 12 through the terminal block 11, realizing the functional coordination between the two. The welding and fixing method between the cabinet support 1 and the connecting frame 9 ensures the stability of the installation structure and prevents electrical component 10 from loosening or shifting during operation. The orderly layout of multiple electrical components 10 improves the utilization rate of the internal space of the cabinet. The setting of the terminal block 11 makes the connection between electrical component 10 and electrical component 12 more orderly, reducing the problem of messy cables. This facilitates later inspection and maintenance, ensures the smooth transmission of electrical energy and signals, and reduces the risk of failure caused by poor contact.

[0034] See figure - Figure 4 The connecting plate 14 at the end of the ceramic column 13 provides mounting support for the upper contact plate 5. The tail end of the upper contact plate 5 is movably mounted on the connecting plate 14 via a shaft to ensure flexible rotation. When the upper contact plate 5 needs to be driven to move, the push rod 4 on one side generates a pushing or pulling force and transmits it to the connecting rod 15. The connecting rod 15 drives the push plate 20 at the end of the rotating shaft 16, which is movably mounted on the cabinet bracket 1, to move, thereby driving the rotating shaft 16 to rotate. The rotating rod 17, which is fixedly connected to the rotating shaft 16, rotates synchronously with the rotating shaft 16. The rotating rod 17 drives the pull rod 18 to push and pull the upper contact plate 5 via the shaft at its end. In the middle section, the upper touch plate 5 is finally rotated. The components form a complete and flexible transmission link through shafts, connecting rods and other structures. The cabinet bracket 1 provides a stable installation base for the rotating shaft 16. The connecting plate 14 at the end of the ceramic column 13 ensures the installation stability and rotational flexibility of the upper touch plate 5. The power of the push rod 4 is transmitted to the upper touch plate 5 in an orderly manner through the connecting rod 15, push plate 20, rotating shaft 16, rotating rod 17 and pull rod 18. The transmission is efficient and precise, avoiding power loss or action jamming, effectively improving the reliability of the cooperation between the upper touch plate 5 and the corresponding components, and reducing the risk of transmission failure.

[0035] As a key connecting component in the transmission structure of the upper contact plate 5, the pull rod 18 performs a push-pull action driven by the rotating rod 17. During this process, the pull rod 18, relying on the properties of its insulating material, transmits power to drive the upper contact plate 5 while blocking current conduction through itself, thus preventing the formation of an accidental conductive path. The pull rod 18 is made of insulating material, which not only does not affect its core function of transmitting power in the transmission link, but also plays a reliable electrical isolation role. This effectively prevents safety hazards such as leakage and short circuit caused by component conductivity during transmission, ensuring the insulation safety of the internal circuit system of the electrical cabinet. At the same time, the insulating material has good structural stability, which can maintain the transmission accuracy of the pull rod 18 for a long time and reduce the risk of equipment failure due to insulation failure.

[0036] The insulating material is one of the following: epoxy glass cloth laminate, polyetheretherketone, alumina ceramic, silicone rubber.

[0037] The upper contact plate 5 is composed of two arc-shaped metal plates. Driven by the transmission structure, the two arc-shaped metal plates move synchronously towards the upper connector 7 until the inner side of the metal plate is tightly attached to the outer wall of the upper connector 7. The conductivity of the metal plates is used to build a stable electrical path, realizing the smooth transmission of current between the upper contact plate 5 and the upper connector 7. When it is necessary to disconnect the circuit, the transmission structure drives the two arc-shaped metal plates away from the upper connector 7, and the inner side of the metal plate separates from the outer wall of the upper connector 7, thus disconnecting the electrical path. The structural design of the two arc-shaped metal plates can form a full fit with the outer wall of the upper connector 7, increasing the contact area, reducing contact resistance, ensuring the stability and efficiency of current transmission, and avoiding problems such as overheating and arcing caused by poor contact. At the same time, the arc-shaped structure makes the docking of the metal plate and the upper connector 7 more precise, and it is not easy to deviate or wear during the operation, extending the service life of the upper contact plate 5 and the upper connector 7, and improving the reliability of the electrical cabinet circuit conduction.

[0038] The two ends of the rotating shaft 19 are movably mounted on the cabinet support 1 to form a stable rotating base. The tail end of the lower contact plate 6 is fixed to the rotating shaft 19 to rotate synchronously with it. When the lower contact plate 6 needs to be driven to move, the push rod 4 on the other side generates driving force and transmits it to the connecting rod 22. The connecting rod 22 drives the push plate 21 to move through the shaft at its end. The rotating shaft 19, which is fixedly connected to the push plate 21, rotates accordingly, thereby driving the lower contact plate 6 to complete the corresponding action to achieve contact or disengagement with the lower connector 8. The cabinet support 1 provides a stable mounting support for the rotating shaft 19. The transmission link formed by the push rod 4, connecting rod 22, push plate 21 and rotating shaft 19 is tightly connected, and the power transmission is direct and without unnecessary loss. It can accurately drive the lower contact plate 6 to move. The movable connection of each component through the shaft ensures the flexibility of the transmission and avoids the action jamming or jamming. At the same time, the fixed connection between the lower contact plate 6 and the rotating shaft 19 ensures the consistency of the action, improves the reliability of the cooperation between the lower contact plate 6 and the lower connector 8, and reduces the risk of transmission failure and poor circuit contact.

[0039] The rotating shaft 19, as the core component for the installation and transmission of the lower contact plate 6, rotates under the drive of the connecting rod 22 and the push plate 21, thereby driving the lower contact plate 6 to complete the contact or disengagement action with the lower connector 8. During this process, the rotating shaft 19, relying on the properties of its own insulating material, blocks the current from being conducted through it to the cabinet support 1 or other transmission components, avoiding the formation of an accidental conductive circuit. The rotating shaft 19 is made of insulating material, which not only ensures its structural strength and rotational stability as a transmission component, enabling it to withstand the installation load of the lower contact plate 6 and the mechanical force during the transmission process for a long time, but also achieves reliable electrical isolation, effectively preventing the current on the lower contact plate 6 from leaking to other metal components and causing safety hazards such as leakage and short circuit. This further enhances the insulation protection performance of the electrical cabinet and reduces the safety risks and failure probability during equipment operation.

[0040] The insulating material is one of the following: epoxy glass cloth laminate, polyetheretherketone, alumina ceramic, silicone rubber.

[0041] The lower contact plate 6 on the bottom side is fixedly connected to the grounding wire via a cable. When static electricity accumulates or fault current occurs inside the electrical cabinet, these harmful currents will be conducted to the cable through the lower contact plate 6, and then quickly conducted to the grounding wire through the cable, ultimately safely discharging the current to the ground and preventing current from lingering on the cabinet or internal components. The reliable connection between the lower contact plate 6 and the grounding wire through the cable constructs a complete grounding protection circuit, which can promptly dissipate static electricity and fault current, effectively avoiding safety risks such as equipment damage, short circuits, or electric shock caused by current accumulation. At the same time, the cable connection method ensures the stability of the grounding link, making it less prone to grounding failure due to loosening or poor contact, further improving the safety and reliability of the electrical cabinet operation and meeting the strict requirements of the power system for equipment safe grounding.

[0042] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A suspended high and low voltage switchgear, comprising a cabinet support (1), characterized in that: The cabinet support (1) is covered with a protective plate. The front of the cabinet support (1) is a door frame plate (2). The surface of the door frame plate (2) is provided with a door panel (3) that can be opened and closed. The door panel (3) is locked to the door frame plate (2) by a door lock. Four sets of push rods (4) are provided on both sides of the surface of the door frame plate (2). The four sets of push rods (4) are in pairs, with the upper one being one set and the lower one being another set. Each set of push rods is used to make the upper contact plate (5) and the lower contact plate (6) contact / disconnect with the upper connector (7) and the lower connector (8) respectively.

2. A suspended high and low voltage switchgear according to claim 1, characterized in that: A connecting frame (9) is welded in the middle of the cabinet support (1). Multiple sets of electrical components (10) are installed on the connecting frame (9). Electrical components (10) are connected to electrical components (12) through a terminal block (11).

3. A suspended high and low voltage switchgear according to claim 1 or 2, characterized in that: The tail end of the upper touch plate (5) is movably mounted on the connecting plate (14) at the end of the ceramic column (13) via a shaft. The push rod (4) on one side is movably connected to the push plate (20) at the end of the rotating shaft (16) movably mounted on the cabinet bracket (1) via a connecting rod (15). The rotating shaft (16) is fixed with a rotating rod (17). The end of the rotating rod (17) is movably mounted with a pull rod (18) via a shaft. The pull rod (18) is movably connected to the middle of the upper touch plate (5) via a shaft.

4. A suspended high and low voltage switchgear according to claim 3, characterized in that: The first pull rod (18) is made of insulating material.

5. A suspended high and low voltage switchgear according to claim 3, characterized in that: The upper contact plate (5) is composed of two arc-shaped metal plates. The inner side of the metal plate contacts the outer wall of the upper connector (7) to achieve an electrical path.

6. A suspended high and low voltage switchgear according to claim 3, characterized in that: The tail end of the lower contact plate (6) is fixed on the second rotating shaft (19). The two ends of the second rotating shaft (19) are movably installed on the cabinet bracket (1) through the shaft. One end of the second rotating shaft (19) is fixedly connected to the second push plate (21). The end of the second push plate (21) is movably connected to the second connecting rod (22) through the shaft. The second connecting rod (22) is movably connected to the other push rod (4) through the shaft.

7. A suspended high and low voltage switchgear according to claim 6, characterized in that: The second shaft (19) is made of insulating material.

8. A suspended high and low voltage switchgear according to claim 7, characterized in that: The grounding wire is connected to the lower contact plate (6) on the lower side via a cable.

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