Open-type combined electric appliance

Abstract

The utility model relates to the technical field of disconnecting switches, in particular to an open-type combined electric appliance. The open-type combined electric appliance comprises a stand column and a mounting seat fixedly mounted at the top of the stand column, the mounting seat is provided with an isolating switch, a lightning arrester and a lightning arrester online monitor, the stand column is provided with a grounding point, the lightning arrester is communicated with the grounding point through a grounding wire and is grounded, and the lightning arrester online monitor is connected with the grounding point. The lightning arrester on-line monitor is connected to the grounding wire in series, a wiring groove is formed in the installation base, and the portion, between the lightning arrester on-line monitor and the grounding point, of the grounding wire is laid in the wiring groove. The open-type combined electric appliance solves the problems that in the prior art, a connecting line of a lightning arrester on-line monitor connected with a grounding point is exposed, so that wiring is complex and disordered, and operation and maintenance personnel are inconvenient to comb and maintain.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to an open-type combined electrical appliance. Background Technology

[0002] Outdoor open-type disconnectors are important switching devices installed in the electrical systems of power plants and substations. They primarily function to isolate and protect the power grid, providing circuit switching and fault isolation. Outdoor open-type disconnectors typically consist of a post mounted on the ground, with a mounting base on top. The disconnector is mounted on the mounting base, and its closed or open state indicates whether it is isolating or switching the power grid circuit. A surge arrester is usually installed on the mounting base to transfer overvoltages caused by lightning strikes to the ground, further protecting the entire disconnector. Surge arresters are often used in conjunction with online surge arrester monitors. The online surge arrester monitor detects the leakage current of the surge arrester to determine its condition and records the number of times it operates under overvoltage conditions to assess its aging. Typically, one end of the surge arrester is connected to the disconnector via a connecting wire, and the other end is connected to the grounding point via a grounding wire. The online surge arrester monitor is connected in series with the grounding wire.

[0003] In traditional outdoor open-type disconnect switches, refer to Figure 1 A mounting base is installed at the top of the column, where the surge arrester and disconnector are mounted. A horizontal beam is installed between the upper and lower grounding points of the two columns, and the surge arrester online monitor is mounted on the beam. The surge arrester and disconnector are connected via a connecting wire. The bottom of the surge arrester is connected to the lower grounding point of the column via a grounding wire, and the surge arrester online monitor is connected in series with the grounding wire. However, because the distance between the surge arrester and the surge arrester online monitor, as well as the distance between the surge arrester online monitor and the grounding point, is relatively long, the grounding wire is quite long, making the wiring and connection of the outdoor open-type disconnector quite messy. Furthermore, the grounding wire is entirely exposed, resulting in complex and chaotic wiring for the entire outdoor open-type switch, making it inconvenient for maintenance personnel to organize and repair, and affecting the overall product appearance. Meanwhile, because the surge arrester online monitoring device is installed on the crossbeam, and to avoid the upper grounding point on the column, the crossbeam is located below the upper grounding point, so the surge arrester online monitoring device is a relatively long distance away from the disconnector mounting base. However, the design specifications require that the disconnector switch be no less than 2.6 meters from the ground and the surge arrester online monitoring device be no less than 2.5 meters from the ground. Therefore, while the design requirement of the disconnector switch being 2.6 meters from the ground is just met, the surge arrester online monitoring device cannot meet the design requirement of being no less than 2.5 meters from the ground. If the design specifications are to be met, the column needs to be raised, which increases the production cost of the open disconnector switch.

[0004] Chinese utility model patent CN201690118U discloses an open-type outdoor high-voltage protection combination electrical appliance. This combination electrical appliance includes a bracket, which comprises a column and a mounting base fixedly installed on top of the column. A disconnecting switch is installed above one end of the mounting base, and a voltage transformer is installed above the other end. A fuse is connected to the inside of the voltage transformer on the mounting base, and a surge arrester is connected to the inside of the fuse. An online surge arrester monitoring instrument is installed below the surge arrester. In the above-mentioned open-type outdoor high-voltage protection combination electrical appliance, the surge arrester online monitoring instrument is located below the surge arrester, and both the surge arrester and the disconnecting switch are mounted on the mounting base. Therefore, the disconnecting switch and the surge arrester online monitoring instrument are basically at the same height. So, when the disconnecting switch meets the design requirement of 2.6 meters above the ground, the surge arrester online monitoring instrument can also meet the design requirement of not less than 2.5 meters above the ground, avoiding the problem of additional costs caused by raising the column.

[0005] However, in the aforementioned existing technology, the surge arrester online monitoring instrument needs to be grounded by connecting to the grounding point on the pole through a grounding wire. Because the surge arrester online monitoring instrument is installed on the top of the mounting base along with the surge arrester, and the location of the surge arrester online monitoring instrument is far from the grounding point on the pole, even after connecting the surge arrester online monitoring instrument to the grounding point on the pole through a grounding wire, the grounding wire is still exposed, making the wiring of the overall open outdoor high-voltage protection switchgear complex and messy, affecting the overall product image and causing inconvenience for maintenance personnel in sorting and repairing. Utility Model Content

[0006] The purpose of this utility model is to provide an open-type combined electrical appliance to solve the problem in the prior art where the connection wires of the grounding point of the surge arrester online monitor are exposed, resulting in complex and messy wiring and inconvenience for maintenance personnel to sort out and repair.

[0007] To solve the above problems, the open-type combined electrical appliance of this utility model adopts the following technical solution:

[0008] An open-type combined electrical appliance includes a column and a mounting base fixedly installed on the top of the column. The mounting base is equipped with a disconnecting switch, a surge arrester, and a surge arrester online monitoring device. The column is provided with a grounding point. The surge arrester is grounded to the grounding point through a grounding wire. The surge arrester online monitoring device is connected in series with the grounding wire. The mounting base is provided with a wiring groove. The grounding wire between the surge arrester online monitoring device and the grounding point is laid in the wiring groove.

[0009] Furthermore, the mounting base includes a disconnecting switch base and a surge arrester base fixed on the disconnecting switch base. The disconnecting switch is mounted on the disconnecting switch base, and the surge arrester and the surge arrester online monitor are mounted on the surge arrester base and located behind the disconnecting switch. The wiring trough is provided on the surge arrester base.

[0010] Furthermore, the arrester base is made of channel steel, and the inner cavity of the channel steel forms the wiring groove.

[0011] Furthermore, the channel steel has its slot facing downwards, the surge arrester is installed on the outer side of the channel bottom of the channel steel, a mounting plate is provided at the slot, and the surge arrester online monitor is installed on the mounting plate.

[0012] Furthermore, the mounting plate has an inclined mounting surface, and the surge arrester online monitor is mounted on the inclined mounting surface such that the reading window of the surge arrester online monitor is tilted toward the ground.

[0013] Furthermore, the mounting plate includes a connecting section fixedly connected to the slot and a bent section that bends at the tail of the connecting section at an inclination, wherein the side of the bent section facing the ground constitutes the inclined mounting surface.

[0014] Furthermore, the bent section is bent at an angle toward the rear and lower part of the connecting section so that the inclined mounting surface faces forward.

[0015] Furthermore, the bent section is provided with a slot, through which the wiring terminal of the surge arrester online monitor is exposed.

[0016] Furthermore, the grounding point includes an upper grounding point and a lower grounding point arranged at an interval, and the surge arrester online monitor is connected to the upper grounding point.

[0017] This invention relates to an improved open-type combined electrical appliance. The advantages of this open-type combined electrical appliance are as follows: It integrates the disconnecting switch, surge arrester, and surge arrester online monitor all onto a mounting base at the top of the column, reducing the relative distance between the surge arrester and the surge arrester online monitor, thereby shortening the electrical connection lines between them. A wiring groove is provided on the mounting base to accommodate the grounding wire between the surge arrester online monitor and the grounding point, concealing and shielding the grounding wire. This reduces the number of exposed grounding wires, making the wiring of the open-type combined electrical appliance neater and clearer, improving its overall appearance, and facilitating maintenance and inspection by operation and maintenance personnel. Attached Figure Description

[0018] Figure 1 A schematic diagram of a combined electrical appliance provided for the prior art;

[0019] Figure 2 A three-dimensional structural diagram of the open-type combined electrical appliance provided in this embodiment of the utility model;

[0020] Figure 3 This is a front view of the open-type combined electrical appliance provided in an embodiment of this utility model;

[0021] Figure 4 yes Figure 3 A diagram showing a view from the right rear.

[0022] Figure 5 yes Figure 4 The right view;

[0023] Figure 6 for Figure 5 Enlarged schematic diagram of part A in the diagram.

[0024] In the diagram: 10, column; 11, upper grounding point; 12, lower grounding point; 20, mounting base; 21, disconnector base; 22, surge arrester base; 221, slot; 222, cable tray; 30, disconnector; 50, surge arrester; 60, surge arrester online monitor; 70, mounting plate; 71, connecting section; 72, bending section; 721, inclined mounting surface; 722, slot. Detailed Implementation

[0025] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0026] The basic inventive concept of this utility model is to set a mounting base on the top of the column, and to integrate a surge arrester, a disconnecting switch and a surge arrester online monitor on the mounting base. The mounting base is also provided with a wiring trough, so that the grounding wire of the surge arrester online monitor's grounding point can be placed in the wiring trough. This wiring trough shields and hides the connection wires, reducing the exposed part of the wiring wires, making the wiring of the open-type combined electrical appliance neat and clear, and no longer affecting the maintenance personnel's inspection and observation due to messy wiring.

[0027] Based on the main concepts above, different embodiments are provided below for illustration.

[0028] The implementation method of the open-type combined electrical appliance of this utility model is as follows:

[0029] In a typical scheme, refer to Figure 2-6As shown, the open-type combined electrical appliance includes a column 10, which is a vertical column set on the ground. An upper grounding point 11 and a lower grounding point 12 are arranged vertically along the axial direction of the column 10, and the upper grounding point 11 and lower grounding point 12 are arranged in pairs on two different columns 10. A mounting base 20 is provided at the top of the column 10. The mounting base 20 includes a disconnecting switch base 21 for supporting the disconnecting switch 30 and a surge arrester base 22 for supporting the surge arrester 50. The surge arrester base 22 is located on the side of the disconnecting switch base 21 facing the ground, preventing the disconnecting switch base 21 from obstructing or interfering with the surge arrester online monitor 60 and affecting the readings of maintenance personnel. It also allows the surge arrester online monitor 60 mounted on the surge arrester base 22 to be closer to the upper grounding point 11, shortening the grounding wire between them. The surge arrester base 22 is a channel steel structure, so a wiring groove 222 is formed within the inner cavity of the channel steel. The channel steel has its opening 221 facing the ground and its bottom facing upwards. This allows for the connection and installation of the surge arrester 50 on the outer side of the channel steel's bottom, meaning the surge arrester 50 is positioned on the top surface of the surge arrester base 22. This ensures the stability of the connection between the surge arrester base 22 and the surge arrester 50, as well as the stability of the support for the surge arrester 50. On the other hand, it also helps to prevent rain, snow, and dust from accumulating in the cable tray 222 of the channel steel, thus providing some protection for the grounding wire inside the cable tray 222. A mounting plate 70 is connected to one side of the channel steel with a slot 221. The mounting plate 70 includes a connecting section 71 and a bent section 72 that are connected to each other. The connecting section 71 is used to connect to the slot 221 of the channel steel. The bent section 72 is located at the end of the connecting section 71 away from the channel steel, and the bent section 72 is bent relative to the connecting section 71, so that one side of the bent section 72 faces the arrester base 22 and the other side faces the ground. The side of the bent section 72 facing the ground forms an inclined mounting surface 721 for connecting and fixing the arrester online monitor 60. Because the inclined mounting surface 721 is inclined to the ground, the arrester online monitor 60 can be installed on the inclined mounting surface 721 at an angle relative to the ground, so that the reading window on the arrester online monitor 60 faces the ground, making it convenient for maintenance personnel to read the arrester online monitor 60. A slot 722 is provided on the bending section, through which the online surge arrester monitor 60 can expose its wiring terminals, facilitating wiring with the surge arrester 50 and the upper grounding point 11. When the bending section 72 bends relative to the connecting section 71, it bends towards the side where the surge arrester 50 is installed, that is, towards the rear and lower part of the connecting section 71. This ensures that the inclined mounting surface 721 on the bending section 72 faces away from the surge arrester 50, thus guaranteeing the safety of maintenance personnel when reading the online surge arrester monitor 60.

[0030] The top terminal of the surge arrester 50 is connected to the disconnector 30 via a connecting wire, and the bottom terminal of the surge arrester 50 is connected to the upper grounding point 11 on the column 10 via a grounding wire. The surge arrester online monitor 60 is connected in series on this grounding wire. The surge arrester 50 is located on top of the surge arrester base 22, and the surge arrester online monitor 60 is located below the surge arrester base 22. The grounding wire connecting the surge arrester 50 and the surge arrester online monitor 60 is exposed, while the part of the grounding wire connecting the surge arrester online monitor 60 and the upper grounding point 11 is laid in the wiring groove 222 of the surge arrester base 22. This allows the part of the grounding wire to be accommodated and hidden by the wiring groove 222, reducing the number of grounding wires exposed to the outside. This makes the overall wiring of the open-type combined electrical appliance neater and more orderly, improves the overall appearance of the open-type combined electrical appliance, and facilitates the maintenance personnel's inspection and observation of the open-type combined electrical appliance.

[0031] In the above embodiment, the surge arrester base 22 is horizontally and vertically connected to the disconnector switch base 21, such that one end of the surge arrester base 22 is equipped with the surge arrester 50 and the surge arrester online monitor 60, and the other end is close to the upper grounding point 11 of the column 10. This allows the connecting wire between the surge arrester online monitor 60 and the upper grounding point 11 to be housed within the surge arrester base 22, guiding the connecting wire. This allows the connecting wire leading from the surge arrester online monitor 60 to pass directly through the surge arrester base 22 and then connect to the upper grounding point 11 from the other end of the surge arrester base 22. This allows most of the connecting wire to be hidden and housed within the surge arrester base 22, with minimal exposed portion, making the grounding wire between the surge arrester online monitor 60 and the upper grounding point 11 more orderly and organized.

[0032] In this embodiment, the disconnecting switch 30 is used to isolate the power supply. During maintenance and repair, it can isolate the equipment and lines from the power supply, forming a clear disconnection point to ensure the personal safety of maintenance personnel. The disconnecting switch 30 also has the function of switching operations and handling small currents.

[0033] In this embodiment, the surge arrester 50 is used to conduct the overvoltage generated by the lightning strike to the ground through its own characteristics when the open-type combined electrical appliance is struck by lightning in the natural environment, thereby protecting the open-type combined electrical appliance.

[0034] In this embodiment, the surge arrester online monitor 60 can monitor the leakage current (peak value) through the surge arrester 50 under the operating voltage using a milliammeter, and can determine whether the surge arrester 50 is damp inside, or whether the components are abnormal, etc.

[0035] In another embodiment, the surge arrester base 22 and the disconnector switch base 21 are integrally formed, meaning that the surge arrester 50, the disconnector switch 30, and the surge arrester online monitor 60 are all mounted on the mounting base 20. In this embodiment, the disconnector switch 30 and the surge arrester 50 are mounted on the top surface of the mounting base 20, and the surge arrester online monitor 60 is mounted on the bottom surface of the mounting base 20, making the surge arrester online monitor 60 closer to the grounding point on the column 10. Simultaneously, a wiring groove 222 is directly provided on the mounting base 20 to house and accommodate the grounding wire between the surge arrester online monitor 60 and the upper grounding point 11, guiding and concealing this portion of the grounding wire.

[0036] In the above embodiments, the surge arrester base 22 is a channel steel structure, and the inner cavity of the channel steel forms a wiring groove 222 for accommodating the grounding wire. In another embodiment, the surge arrester base 22 is a hollow square tube, with the hollow interior forming the wiring groove 222. This facilitates the installation of the surge arrester 50 and the surge arrester online monitor 60 on the outer surface of the square tube's planar structure, and also allows the wiring groove 222 to facilitate the routing of the connection wire between the surge arrester online monitor 60 and the upper grounding point 11 into the surge arrester base 22. In yet another embodiment, the surge arrester base 22 is an "H"-shaped steel structure, with the wiring groove 222 formed between the central connecting beam and the longitudinal beams on both sides of the "H"-shaped steel structure.

[0037] In this embodiment, the channel steel's opening 221 faces the ground, the surge arrester 50 is positioned at the top of the channel steel, and the surge arrester online monitor 60 is positioned on one side of the opening in the channel steel. This improves the support stability of the surge arrester 50 and prevents rain, snow, and dust from accumulating in the cable tray 222. In another embodiment, the channel steel's opening 221 faces either the left or right side, meaning the two side walls of the channel steel are vertically opposite each other. This allows the surge arrester 50 to be positioned on the outer surface of the top wall of the channel steel, and the surge arrester online monitor 60 to be positioned on the outer surface of the bottom wall of the channel steel. This ensures a high-strength and stable connection between the surge arrester 50, the surge arrester online monitor 60, and the surge arrester base 22.

[0038] In embodiments where the channel steel opening 221 faces the ground, the surge arrester online monitor 60 can be directly placed inside the channel steel opening 221, i.e., at the bottom of the cable tray 222, so that the surge arrester online monitor 60 is housed within the cable tray 222, and the reading window of the surge arrester online monitor 60 faces the ground. Alternatively, the surge arrester online monitor 60 can be placed on the outer surface of one side of the channel steel wall, with the reading window of the surge arrester online monitor 60 facing the horizontal direction. Alternatively, the surge arrester online monitor 60 can be placed at the edges of both sides of the channel steel wall, with the reading windows of the surge arrester online monitor 60 facing the ground.

[0039] In a preferred embodiment, a mounting plate 70 is connected to the opening of the channel steel, and the surge arrester online monitor 60 is mounted on one side of the mounting plate 70.

[0040] In a preferred embodiment of the above-described embodiments, the mounting plate 70 is bent so that the side of the bent section 72 facing the ground forms an inclined mounting surface 721 for mounting the surge arrester online monitor 60. This allows the reading window of the surge arrester online monitor 60 to form an angle with the ground, facilitating observation by maintenance personnel. In another embodiment, the mounting plate 70 is bent so that the bent section 72 is parallel to the ground, i.e., the connecting section 71 and the bent section 72 form an "L" shape. This makes the inclined mounting surface 721 on the side of the bent section 72 facing the ground a horizontal plane, allowing the reading window of the surge arrester online monitor 60 to face the ground.

[0041] In another embodiment, the mounting plate 70 is a flat plate, and the mounting plate 70 is inclinedly connected to the bottom of the surge arrester base 22, so that the mounting plate 70 is inclined from the end connected to the surge arrester base 22 to the end of the mounting plate 70 away from the surge arrester base 22, so that one side of the mounting plate 70 faces the surge arrester base 22 and the other side faces the ground. An inclined mounting surface 721 for mounting the surge arrester online monitor 60 is formed on the side of the mounting plate 70 facing the ground, so that the surge arrester online monitor 60 forms a certain angle with the ground, which makes it convenient for maintenance personnel to observe the reading window of the surge arrester online monitor 60.

[0042] In the above embodiments, the bending section 72 bends downwards and backwards towards the connecting section 71, so that the inclined mounting surface 721 faces the front of the connecting section 71. This allows maintenance personnel to maintain a certain distance from the surge arrester 50 when observing the online surge arrester monitor 60, improving safety. In another embodiment, the bending section 72 bends downwards and forwards towards the connecting section 71, so that the inclined mounting surface 721 faces the rear of the connecting section 71. In yet another embodiment, the bending section 72 bends downwards and to the left or right of the connecting section 71, so that the inclined mounting surface 721 faces the left or right side of the connecting section 71.

[0043] In the above embodiment, a U-shaped slot 722 is provided on the bending section 72, through which the surge arrester online monitor 60 can expose its wiring terminals, facilitating its connection with the surge arrester 50 and the upper grounding point 11 via a grounding wire. In another embodiment, a through hole is provided on the bending section 72, through which the surge arrester online monitor 60 can be connected to the surge arrester 50 and the upper grounding point 11.

[0044] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. The patent protection scope of this utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of this utility model shall also be included within the protection scope of this utility model.

Claims

1. An open-type combined electrical appliance, comprising a column and a mounting base fixedly installed on the top of the column, wherein the mounting base is provided with a disconnecting switch, a surge arrester, and a surge arrester online monitoring device; the column is provided with a grounding point; the surge arrester is grounded to the grounding point via a grounding wire; and the surge arrester online monitoring device is connected in series with the grounding wire, characterized in that... The mounting base is provided with a cable tray, and the grounding wire between the surge arrester online monitor and the grounding point is laid in the cable tray.

2. The open-type combined electrical appliance according to claim 1, characterized in that, The mounting base includes a disconnecting switch base and a surge arrester base fixed on the disconnecting switch base. The disconnecting switch is mounted on the disconnecting switch base, and the surge arrester and the surge arrester online monitor are mounted on the surge arrester base and located behind the disconnecting switch. The cable tray is provided on the surge arrester base.

3. The open-type combined electrical appliance according to claim 2, characterized in that, The arrester base is made of channel steel, and the inner cavity of the channel steel forms the cable tray.

4. The open-type combined electrical appliance according to claim 3, characterized in that, The channel steel has its slot facing downwards, and the surge arrester is installed on the outer side of the bottom of the channel steel. A mounting plate is provided at the slot, and the surge arrester online monitor is installed on the mounting plate.

5. The open-type combined electrical appliance according to claim 4, characterized in that, The mounting plate has an inclined mounting surface, and the surge arrester online monitor is mounted on the inclined mounting surface such that the reading window of the surge arrester online monitor is tilted toward the ground.

6. The open-type combined electrical appliance according to claim 5, characterized in that, The mounting plate includes a connecting section fixedly connected to the slot and a bent section that bends at the tail of the connecting section at an inclination. The side of the bent section facing the ground forms the inclined mounting surface.

7. The open-type combined electrical appliance according to claim 6, characterized in that, The bent section bends downwards and backwards towards the connecting section, so that the inclined mounting surface faces forward.

8. The open-type combined electrical appliance according to claim 6 or 7, characterized in that, The bent section has a slot, through which the wiring terminal of the surge arrester online monitor is exposed.

9. The open-type combined electrical appliance according to any one of claims 1-7, characterized in that, The grounding points include an upper grounding point and a lower grounding point arranged at intervals, and the surge arrester online monitor is connected to the upper grounding point.

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