Electric screen cabinet equipotential grounding copper bar
By designing a dedicated equipotential grounding copper bar in the electrical screen cabinet, distinguishing equipotential grounding and equipment grounding, the problem of inconsistent grounding copper bar settings in the existing technology is solved, and the clearness of wiring and convenient inspection by the operator is achieved.
Patent Information
- Application Number
- CN202420506453.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-15
AI Technical Summary
In the prior art, the grounded copper strips in the electrical screen cabinet are not uniform, and there is a lack of distinction between the equal potential grounded copper strips and the equipment grounded copper strips, resulting in confusing wiring, which is not conducive to inspection by operating personnel.
A special copper strip for equal potential grounding of electrical screen cabinets was designed. By setting up a copper strip with a bolt for equal potential grounding grid, a bolt for equal potential grounding of the screen cabinet door, a bolt for equal potential grounding of the cable shield and an equal potential grounding bolt for equal potential grounding of the in-screen device, the wires with equal potential grounding are concentrated on a copper strip, thus realizing the distinction between an equipotential grounding copper strip and an equipment grounding copper strip.
It realizes clearness of wiring, facilitates inspection by operators, and improves the cleanliness and visibility of the grounding wire.
Smart Images
Figure CN222601395U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of grounding copper bars, in particular to an equipotential grounding copper bar for an electrical panel cabinet. Background Art
[0002] In order to reduce the interference of short-circuit current, electromagnetic field, etc. on relay protection devices and secondary cables, the lower part of the panel cabinet of the microcomputer protection and control device is required to have a cross-sectional area of not less than 100mm 2 The copper busbar (not required to be insulated from the protective screen) of the cabinet is required to have a cross-sectional area of not less than 4mm for the grounding terminals of all devices, cable shielding layers, and cabinet doors in the cabinet. 2 The copper busbar is required to have a cross-section of not less than 50mm 2 The copper cable is connected to the equipotential grounding grid.
[0003] In the prior art, the grounding copper busbars in the electrical panel cabinets are not arranged uniformly, the equipotential grounding copper busbars and the equipment grounding copper busbars are not distinguished, and the arrangement on site is messy, which is not conducive to inspection by operating personnel. Utility Model Content
[0004] The purpose of the utility model is to provide an equipotential grounding copper busbar for an electrical panel cabinet in view of the defects of the prior art. The special equipotential grounding copper busbar for an electrical panel cabinet realizes the distinction between the equipotential grounding copper busbar and the equipment grounding copper busbar, concentrates the equipotential grounding wires on one copper busbar, makes the wiring clearer, and is convenient for the operator to inspect.
[0005] The utility model provides an equipotential grounding copper busbar for an electrical panel cabinet, on which are provided bolts for connecting to an equipotential ground grid, bolts for equipotential grounding of a panel cabinet door, bolts for equipotential grounding of a cable shielding layer and bolts for equipotential grounding of devices inside the panel. The bolts for connecting to an equipotential ground grid are connected to the equipotential ground grid, the bolts for equipotential grounding of a panel cabinet door are connected to the panel cabinet door, the bolts for equipotential grounding of a cable shielding layer are connected to the cable shielding layer, and the bolts for equipotential grounding of devices inside the panel are connected to any one or more of a device, a printer and a grounding terminal inside the panel.
[0006] More preferably, the cable shielding layer equipotential grounding bolts include a first cable shielding layer equipotential grounding bolt and a second cable shielding layer equipotential grounding bolt, the first cable shielding layer equipotential grounding bolt is connected to the cable shielding layer in the panel cabinet, and the second cable shielding layer equipotential grounding bolt is connected to the cable shielding layer introduced into the panel from the outside.
[0007] Preferably, the equipotential grounding bolts on the copper busbar, the equipotential grounding bolts for the cabinet door, the equipotential grounding bolts for the first cable shielding layer, the equipotential grounding bolts for the device inside the screen and the equipotential grounding bolts for the second cable shielding layer are arranged in sequence from one end of the copper busbar to the other end.
[0008] Preferably, the copper busbar is provided with labels at corresponding positions of the cable shielding layer equipotential grounding bolts, the screen cabinet door equipotential grounding bolts and the in-screen device equipotential grounding bolts, and the labels are marked with equipment used to connect to each bolt.
[0009] Preferably, bolts for fixing to the cabinet frame are respectively provided at both ends of the copper busbar, and the bolts for fixing to the cabinet frame are threadedly connected to the cabinet frame.
[0010] Preferably, the number of bolts for connecting to the equipotential ground grid is one.
[0011] More preferably, the screen cabinet door body has one equipotential grounding bolt.
[0012] More preferably, there are multiple bolts for equipotential grounding of the first cable shielding layer and multiple bolts for equipotential grounding of the second cable shielding layer.
[0013] More preferably, the device inside the screen has a plurality of equipotential grounding bolts.
[0014] Preferably, the size of the bolts for connecting the equipotential grounding grid is larger than the size of the bolts for equipotential grounding of the cabinet door, the bolts for equipotential grounding of the cable shielding layer and the bolts for equipotential grounding of the device inside the panel.
[0015] The beneficial effects of the utility model are as follows: the dedicated electrical panel cabinet equipotential grounding copper busbar is provided with bolts for connecting the equipotential grounding network, bolts for equipotential grounding of the panel cabinet door, bolts for equipotential grounding of the cable shielding layer and bolts for equipotential grounding of the device inside the panel, so that the equipotential grounding wires are concentrated on one copper busbar, the distinction between the equipotential grounding copper busbar and the equipment grounding copper busbar is achieved, the wiring is clearer, and it is convenient for the operating personnel to inspect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure of the utility model.
[0017] In the figure: 1- copper busbar, 101- bolt for connecting to equipotential ground grid, 102- bolt for equipotential grounding of cabinet door, 103- bolt for equipotential grounding of first cable shielding layer, 104- bolt for equipotential grounding of second cable shielding layer, 105- bolt for equipotential grounding of device inside the panel, 106- bolt for fixing to the cabinet frame DETAILED DESCRIPTION
[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0020] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0022] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. "Multiple" means "two or more".
[0023] Figure 1 The following is a schematic diagram of the structure of an equipotential grounding copper bar for an electrical cabinet provided in a preferred embodiment of the present application. For ease of explanation, only the parts related to the present embodiment are shown, which are described in detail as follows:
[0024] An electrical cabinet equipotential grounding copper bar, the copper bar 1 is provided with equipotential grounding bolts 101, cabinet door equipotential grounding bolts 102, cable shielding layer equipotential grounding bolts and in-panel device equipotential grounding bolts 105. The equipotential grounding bolts 101 are used for crimping a cross section of not less than 50mm 2 The copper cable is connected to the equipotential grounding network in the cable room (or cable trench). The bolt 102 for equipotential grounding of the cabinet door is used for crimping with a cross-sectional area of not less than 4mm 2 The multi-strand copper wire is connected to the door of the cabinet. The bolts used for crimping the cable shielding layer and equipotential grounding are not less than 4mm 2 The multi-strand copper wire is connected to the cable shielding layer. The equipotential grounding bolt 105 for the device inside the screen is used for crimping the cross-sectional area not less than 4mm 2 The multi-strand copper wires are connected to any one or more of the devices, printers, and grounding terminals in the cabinet. Bolts 106 for fixing to the cabinet frame are provided at both ends of the copper busbar 1, and the bolts 106 for fixing to the cabinet frame are threadedly connected to the cabinet frame. The above bolt structure and the corresponding connection relationship set on the copper busbar concentrate the equipotential grounding wires on one copper busbar, realize the distinction between the equipotential grounding copper busbar and the equipment grounding copper busbar, make the wiring clearer, make the wiring inside and outside the cabinet neater, and facilitate the inspection of the operating personnel.
[0025] The cable shielding layer equipotential grounding bolts include a first cable shielding layer equipotential grounding bolt 103 and a second cable shielding layer equipotential grounding bolt 104. The first cable shielding layer equipotential grounding bolt 103 is connected to the cable shielding layer in the panel cabinet, and the second cable shielding layer equipotential grounding bolt 104 is connected to the cable shielding layer introduced from the outside into the panel. The bolts used to connect the cable shielding layer in the panel cabinet and the bolts used to connect the cable shielding layer introduced from the outside into the panel are respectively arranged on both sides of the equipotential grounding bolts 105 of the panel device, so as to distinguish the connecting bolts of the cable shielding layer introduced from the outside into the panel and the cable shielding layer bolts in the panel cabinet, making the wiring clearer and further improving the intuitiveness of the inspection.
[0026] The equipotential grounding bolts 101 on the copper busbar 1, the equipotential grounding bolts 102 for the cabinet door, the equipotential grounding bolts 103 for the first cable shielding layer, the equipotential grounding bolts 105 for the device inside the screen and the equipotential grounding bolts 104 for the second cable shielding layer are arranged in sequence from one end of the copper busbar 1 to the other end.
[0027] In one embodiment, the copper busbar 1 is provided with labels 107 at the corresponding positions of the cable shielding layer equipotential grounding bolts, the screen cabinet door equipotential grounding bolts 102 and the screen device equipotential grounding bolts 105, and the labels 107 are marked with the equipment used to connect with each bolt. The bolts 101 for connecting the equipotential grounding network are not provided with labels, and the size of the bolts 101 for connecting the equipotential grounding network is larger than the size of the bolts 102 for connecting the screen cabinet door equipotential grounding bolts, the cable shielding layer equipotential grounding bolts and the screen device equipotential grounding bolts 105. The bolts 101 for connecting the equipotential grounding network and the other bolts can be directly distinguished by the size of the bolts. Among them, the label 107 can be set on the top, bottom, left, right or bolt head of the bolt, and can be flexibly arranged according to the space requirements. The label can be an adhesive label or other movable labels that are easy to modify and replace. The label can use the unified code of the plant and station to indicate the equipment connected to the screw, so that the operation, maintenance and quality inspection personnel can judge whether all the secondary equipment in the corresponding screen cabinet has been connected to this special equipotential copper busbar as required. Since the number of devices and cables in each electrical cabinet such as the protection cabinet, control cabinet, terminal box, etc. is different, the number of screws for equipotential grounding of the cable shielding layer and the number of screws for equipotential grounding of the devices in the cabinet can be adjusted according to the actual situation, and the labels can be adjusted accordingly. In this embodiment, the bolts 101 for connecting the equipotential ground grid are M15 bolts, and the remaining bolts are M10 bolts, so that the bolts 101 for connecting the equipotential ground grid can be distinguished from the remaining bolts. The center distance between the M15 screw and the M10 opening is 35mm, and the center distance between the M10 screw and the M10 opening is 25mm. Compared with the traditional situation, each power plant has different models, specifications, screw sizes, and numbers of grounding copper bars supplied by various manufacturers. It may occur that the cross-sectional area is too small and cannot meet the 100mm 2 Cross-sectional area; because the screw is too small, it is inconvenient to crimp the grounding wire; the number of grounding screws is too small, and the wiring position is insufficient. This copper busbar has made specific requirements on the copper busbar model specifications, screw size, screw spacing, etc., which is more convenient for crimping the grounding wire.
[0028] In this embodiment, labels are set at the corresponding positions of the equipotential grounding bolts for the cable shielding layer, the equipotential grounding bolts 102 for the panel cabinet door, and the equipotential grounding bolts 105 for the devices inside the panel. The operating personnel can visually judge whether each device has been connected to the equipotential grounding network as required and whether there is any omission through the labels.
[0029] In one embodiment, there is one bolt 101 for connecting the equipotential grounding grid, one bolt 102 for connecting the cabinet door to the equipotential grounding body, multiple bolts 103 for connecting the first cable shielding layer to the equipotential grounding layer and multiple bolts 105 for connecting the device inside the screen to the equipotential grounding layer.
[0030] In one embodiment, the cross-sectional area of the copper busbar is 30×4 mm.2 , the length of the copper busbar is determined according to the width of the electrical cabinet. The copper busbar is fixed to the lower part of the electrical cabinet, higher than the fireproof sealing area of the cabinet. The screws for equipotential grounding of the cable shielding layer, the screws for equipotential grounding of the cabinet door, and the screws for equipotential grounding of the device inside the cabinet are all labeled. The screws for the equipotential grounding grid are not labeled and can be distinguished directly by the size of the screws. In this embodiment, there are three specifications according to the width of the power plant cabinet: 1000mm, 800mm, and 600mm, and the corresponding copper busbar lengths are selected as 600mm, 500mm, and 400mm respectively.
[0031] In one embodiment, taking the generator-transformer protection panel of a power plant as an example, the panel cabinet is 800 mm wide, and a 500 mm dedicated equipotential grounding copper busbar is provided, and the copper busbar is fixed to the inner frame of the panel cabinet by screws used to fix the panel cabinet frame.
[0032] The cross section of bolt 101 for connecting the equipotential ground grid is 50mm 2 The copper cable is connected to the equipotential ground grid in the cable trench.
[0033] The cross-sectional area of bolt 102 for equipotential grounding of the cabinet door is 4mm 2 The multi-strand copper wire is connected to the cabinet door. Label code: D.
[0034] The cross-sectional area of the bolt for equipotential grounding of the cable shield is 4mm 2 The multi-strand copper wires are connected to the shielding layer of the cables introduced into the panel from outside. Label code: CAB1~n. The tail number of the code is determined according to the number of cables introduced into the panel from outside.
[0035] The cross-sectional area of the bolt 105 for equipotential grounding of the device inside the screen is 4mm 2 The multi-strand copper wire is connected to the ground terminal of the generator-transformer protection device in the cabinet. Label code: 1n.
[0036] The cross-sectional area of the bolt 105 for equipotential grounding of the device inside the screen is 4mm 2 The multi-strand copper wire is connected to the ground terminal of the operating relay box device in the panel cabinet. Label code: 9n.
[0037] The cross-sectional area of the bolt 105 for equipotential grounding of the device inside the screen is 4mm 2 The multi-strand copper wire is connected to the ground terminal of the printer in the cabinet. Label code: PRT.
[0038] The cross-sectional area of the bolt 105 for equipotential grounding of the device inside the screen is 4mm 2 The multi-strand copper wire is connected to the ground terminal of the communication terminal in the panel cabinet. Label code: TXD.
[0039] The cross-sectional area of the bolt 105 for equipotential grounding of the device inside the screen is 4mm 2The multi-strand copper wire is connected to the grounding terminal of the synchronization terminal in the panel cabinet. Label code: TD.
[0040] Operation, maintenance and quality inspection personnel can check this dedicated equipotential copper busbar to visually determine whether the secondary equipment and cable shielding layers in the corresponding cabinet have been connected to this dedicated equipotential copper busbar as required, and whether the equipotential copper busbar is effectively connected to the equipotential grounding network. In the specific implementation process, if there are many devices or cables in the cabinet, multiple equipotential grounding copper busbars can be set.
[0041] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. An equipotential grounding copper bar for an electrical cabinet, characterized in that: The copper busbar (1) is provided with bolts (101) for connecting to an equipotential grounding network, bolts (102) for equipotential grounding of a cabinet door, bolts for equipotential grounding of a cable shielding layer, and bolts (105) for equipotential grounding of a device inside the cabinet. The bolts (101) for connecting to an equipotential grounding network are connected to the equipotential grounding network, the bolts (102) for equipotential grounding of a cabinet door are connected to the cabinet door, the bolts for equipotential grounding of a cable shielding layer are connected to the cable shielding layer, and the bolts (105) for equipotential grounding of a device inside the cabinet are connected to any one or more of a device, a printer, and a grounding terminal inside the cabinet.
2. The electrical cabinet equipotential grounding copper bar according to claim 1, characterized in that: The cable shielding layer equipotential grounding bolt comprises a first cable shielding layer equipotential grounding bolt (103) and a second cable shielding layer equipotential grounding bolt (104). The first cable shielding layer equipotential grounding bolt (103) is connected to the cable shielding layer in the panel cabinet, and the second cable shielding layer equipotential grounding bolt (104) is connected to the cable shielding layer introduced into the panel from the outside.
3. The electrical cabinet equipotential grounding copper bar according to claim 2, characterized in that: The equipotential grounding bolts (101) on the copper busbar (1), the equipotential grounding bolts (102) for the cabinet door, the equipotential grounding bolts (103) for the first cable shielding layer, the equipotential grounding bolts (105) for the device inside the screen, and the equipotential grounding bolts (104) for the second cable shielding layer are arranged in sequence from one end to the other end of the copper busbar (1).
4. The electrical cabinet equipotential grounding copper bar according to claim 1, characterized in that: The copper busbar (1) is provided with labels (107) at positions corresponding to the cable shielding layer equipotential grounding bolts, the cabinet door equipotential grounding bolts (102) and the in-panel device equipotential grounding bolts (105), respectively, and the labels (107) are marked with equipment used to connect with each bolt.
5. The electrical cabinet equipotential grounding copper bar according to claim 1, characterized in that: Bolts (106) for fixing to the cabinet frame are respectively provided at both ends of the copper bar (1), and the bolts (106) for fixing to the cabinet frame are threadedly connected to the cabinet frame.
6. The electrical cabinet equipotential grounding copper bar according to claim 1, characterized in that: The number of the bolts (101) for connecting to the equipotential ground grid is one.
7. The electrical cabinet equipotential grounding copper bar according to claim 1, characterized in that: The number of the equipotential grounding bolts (102) for the cabinet door is one.
8. The electrical cabinet equipotential grounding copper bar according to claim 2, characterized in that: The first cable shielding layer equipotential grounding bolt (103) and the second cable shielding layer equipotential grounding bolt (104) are both multiple.
9. The electrical cabinet equipotential grounding copper bar according to claim 1, characterized in that: There are multiple equipotential grounding bolts (105) for the in-screen device.
10. The electrical cabinet equipotential grounding copper bar according to claim 1, characterized in that: The size of the equipotential grounding bolt (101) is larger than the size of the equipotential grounding bolt (102) for the cabinet door, the equipotential grounding bolt for the cable shielding layer, and the equipotential grounding bolt (105) for the device inside the cabinet.