Isolation devices for conventional island and BOP electrical systems in nuclear power plants

Abstract

This utility model relates to the field of electrical protection and discloses an isolation device for the electrical system of the conventional island and BOP (Balance of Plant) of a nuclear power plant. This device aims to address the safety risks posed by the close proximity and exposed nature of live connection terminals (pile heads) in adjacent outgoing line bays in existing technologies, which can easily lead to accidental electric shock and short circuit damage to equipment when workers operate in specific bays or near secondary terminal blocks. The device mainly includes a base plate, connection terminals for connecting electrical wiring harnesses disposed on the base plate, and an insulating plate. The key innovation lies in the fact that the insulating plate and the base plate are at least partially spaced apart, together forming a space to accommodate the connection terminals. By constructing an insulating barrier around the exposed live connection terminals, an effective physical isolation space is formed. This barrier can reliably prevent workers' fingers, maintenance tools, or other objects from accidentally touching the live terminals during operation, thereby eliminating the significant safety hazard of electric shock and short circuit damage to equipment caused by accidental contact with live pile heads in adjacent bays.

Description

Technical Field

[0001] This utility model relates to the field of electrical protection technology, and in particular to an isolation device for the electrical system of the conventional island and BOP of a nuclear power plant. Background Technology

[0002] In the safe and stable operation of a nuclear power plant, the low-voltage AC power distribution system (usually referring to the 380V system) of the Conventional Island (CI) and the Balance of Plant (BOP) plays a crucial role in supplying power to a large number of critical and non-critical auxiliary equipment. These systems typically contain numerous densely distributed outgoing line cabinets.

[0003] This design structure, characterized by its proximity and exposed live wires, poses a significant safety hazard when routine inspections, equipment maintenance, troubleshooting, or replacements are performed within a specific outgoing line bay, or on adjacent secondary control, measurement, and signal terminal blocks. When personnel (such as electrical maintenance engineers or technicians) operate, test, or use tools in confined spaces, there is a high risk that body parts (such as hands) or handheld tools (such as screwdrivers, multimeter probes, cables, etc.) may accidentally enter adjacent live wire bay areas, thus accidentally contacting the exposed live wires in adjacent bays. Summary of the Invention

[0004] This invention provides an isolation device for the conventional island and BOP electrical system of a nuclear power plant to improve the safety of electrical maintenance.

[0005] To solve the above-mentioned technical problems, this utility model provides an isolation device for the conventional island and BOP electrical system of a nuclear power plant, the isolation device comprising:

[0006] substrate;

[0007] A connection terminal is disposed on the substrate, and the connection terminal is used to connect an electrical wiring harness;

[0008] An insulating plate, at least a portion of the substrate is arranged at a distance from the insulating plate to form a space for accommodating the connection terminal.

[0009] In one embodiment of the present invention, the connecting terminal is provided with baffles on both sides of the first direction, the baffles having their surfaces perpendicular to the substrate and the first direction, the baffles having their edges connected to the substrate, and the insulating plate being disposed on the side edge of the baffle away from the substrate, the first direction being parallel to the substrate.

[0010] In one embodiment of the present invention, at one end in the second direction, the insulating plate, the baffle, and the substrate together form a wire passage for the electrical wiring harness to pass through, and the second direction is perpendicular to the first direction and parallel to the substrate.

[0011] In one embodiment of the present invention, a section of the insulating plate away from the wire passage is bent toward the substrate to form a folded plate, and a section of the insulating plate near the wire passage is parallel to the substrate to form a flat plate.

[0012] In one embodiment of this utility model, the included angle between the flat plate and the folding plate is an obtuse angle.

[0013] In one embodiment of this utility model, the included angle between the flat plate and the folding plate is 125 degrees to 135 degrees.

[0014] In one embodiment of the present invention, the side edge of the folding plate away from the flat plate abuts against the substrate.

[0015] In one embodiment of the present invention, a plurality of connecting terminals are provided along a first direction, and each connecting terminal is provided with a baffle on both sides of the first direction.

[0016] In one embodiment of the present invention, the two ends of the insulating plate in the first direction are flush with the plate surface of the baffle located at both ends in the first direction.

[0017] In one embodiment of this utility model, the insulating plate is made of a transparent material.

[0018] The beneficial effects of this utility model are as follows: This utility model proposes an isolation device for the electrical system of the conventional island and Balance of Plant (BOP) in a nuclear power plant. By arranging insulating plates and substrates at intervals, a space is formed to accommodate the connection terminals, effectively shielding the previously exposed live terminals within an insulating barrier. When workers are working on adjacent bays or secondary terminal blocks, the space formed by the insulating plates becomes a reliable physical barrier, effectively preventing accidental contact between personnel's fingers, tools (such as screwdrivers, multimeter probes), or other objects with the exposed live terminals. This solves the safety hazard of accidental contact with live terminals in adjacent bays, which could lead to electric shock. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of the structure of the isolation device for the conventional island and BOP electrical system of a nuclear power plant provided in an embodiment of the present invention;

[0022] Figure 2 This is a disassembly diagram of the electrical system isolation device for the conventional island and BOP of a nuclear power plant provided in one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the insulating plate provided in one embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the bending angle structure of the insulating plate provided in one embodiment of the present invention.

[0025] The attached figures are labeled as follows:

[0026] 1. Electrical wiring harness; 10. Base plate; 20. Connecting terminal; 30. Insulating plate; 31. Flat plate; 32. Folding plate; 40. Baffle; 50. Wire passage. Detailed Implementation

[0027] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0029] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0030] As a crucial component of the national energy system, the safe and stable operation of nuclear power plants is vital for energy supply, environmental protection, and socio-economic development. Among the various facilities within a nuclear power plant, the 380V low-voltage AC power distribution system of the Conventional Island (CI) and Balance of Plant (BOP) is responsible for providing power to a large number of critical and non-critical auxiliary equipment. These systems not only directly affect the normal operation of the nuclear power plant, but their safety is also related to the lives of workers, the reliability of equipment, and the overall safety of the nuclear power plant.

[0031] A 380V low-voltage AC power distribution system typically consists of multiple outgoing switchgear, each responsible for supplying power to specific equipment. These switchgear must be designed for high reliability to ensure normal operation under various conditions, especially during periods of heavy load or fault occurrence, requiring effective protection and isolation measures. Due to the complex working environment and dense equipment in nuclear power plants, particularly the limited space and compact layout of power distribution cabinets in the conventional island and Balance of Plant (BOP) areas, any potential design flaws or safety hazards can pose a significant threat to the safety of the nuclear power plant.

[0032] A significant safety hazard exists in the current design of 380V low-voltage switchgear in the conventional island and BOP (Balance of Plant) area of ​​nuclear power plants: the outgoing terminals below adjacent switches or circuit breakers are designed too compactly and lack sufficient physical isolation. Specifically, these power terminals or posts (pile heads) are usually energized, and under high load operation, these exposed metal connections can easily become potential sources of electric shock. Due to the close physical distance between these outgoing terminals, workers performing inspections, maintenance, and troubleshooting are highly susceptible to accidental hand or tool contact with adjacent energized areas due to space constraints or careless operation, leading to electric shock accidents.

[0033] This design, with exposed live terminals too close together, poses a serious safety hazard to workers performing equipment maintenance, especially when testing or replacing secondary control and signal terminal blocks. Due to the high voltage and high current characteristics of power systems, accidental contact with exposed live terminals could result in electric shock. This risk is significantly increased, particularly in confined spaces like distribution cabinets, where the risk of accidental contact with live components is greatly amplified. Electric shock can cause injury or even death to workers.

[0034] If workers accidentally touch a live terminal, it could cause a short circuit, or even an arc flashover or phase-to-phase short circuit. These faults can lead to a surge in current, causing serious damage to electrical equipment and potentially burning out critical equipment such as distribution cabinets and switchgear. More seriously, these faults can trigger the power system's protection mechanisms, causing upstream protection systems to operate, resulting in widespread power outages, affecting the normal operation of the nuclear power plant, and negatively impacting its safety features.

[0035] Please see Figure 1-4 , Figure 1 An embodiment of the present invention provides an isolation device for the conventional island and BOP electrical system of a nuclear power plant, comprising a base plate 10, connecting terminals 20, and an insulating plate 30. The isolation device is located within an electrical box.

[0036] The connection terminal 20 is disposed on the substrate 10 and is used to connect the electrical wiring harness 1.

[0037] The insulating plate 30 is arranged at least a portion of the substrate 10 at a distance from the insulating plate 30 to form a space for accommodating the connection terminal 20. The insulation value of the insulating plate 30 is ≥0.5ΩM.

[0038] The live connection terminals 20 are effectively enclosed within the enclosing space formed by the insulating plate 30 and the substrate 10. This spatial structure itself constitutes a solid physical barrier, directly preventing workers from accidentally touching these previously exposed live terminals with their fingers or commonly used tools (such as screwdrivers or multimeter probes) while performing maintenance (such as wiring, inspection, or operating nearby equipment or secondary terminal blocks) inside the electrical box. This eliminates the significant personal safety risk of electric shock due to accidental entry or contact at the source.

[0039] In addition to preventing electric shock, this physical isolation space effectively prevents loose metal parts, fallen tool fragments, unintentionally spliced ​​wires, or other conductive foreign objects from accidentally falling between adjacent live terminals or between terminals and the enclosure. This significantly reduces the probability of serious electrical accidents such as phase-to-phase short circuits and single-phase-to-ground short circuits caused by foreign objects or misoperation, thereby avoiding the risks of equipment burnout, electrical fires, malfunctioning or over-tripping of protection devices, and system shutdowns.

[0040] The side of the insulating plate 30 furthest from the substrate 10 (i.e., the exposed surface) faces the interior space of the electrical box. This means that when personnel are working near the operating door of the electrical box (a typical working position), the insulating plate 30 itself constitutes the first robust barrier protecting the terminals, placing hazardous live parts behind them. This design makes full use of the physical structure of the electrical box itself and the installation location of the devices, maximizing the spatial isolation between hazardous live areas and personnel operating areas.

[0041] The insulating board 30 itself possesses reliable and sufficient insulation properties, which is the basis for its protective function. Even when the device is in a live operating environment, it can provide effective electrical insulation protection on the barrier surface that personnel may approach, ensuring safe and reliable isolation of live parts at high voltage levels.

[0042] like Figure 1 , 2 As shown, in one embodiment of this utility model, the connecting terminal 20 is provided with baffles 40 on both sides of the first direction, with the baffles 40 having a plate surface perpendicular to the substrate 10. The plate edges of the baffles 40 are connected to the substrate 10. An insulating plate 30 is disposed on the plate edge of the baffles 40 away from the substrate 10, with the first direction parallel to the substrate 10. Four small holes of φ4mm±1mm are opened on the front surface of the insulating plate 30, and self-tapping screws are locked onto the spaced baffles 40 to fix the insulating plate 30. The first direction can specifically be a vertical direction, perpendicular to the plate surface of the baffles 40. In this embodiment, baffles 40 erected perpendicular to the substrate 10 are added on both sides of the connecting terminal 20 (along the first direction, such as the vertical direction). The edges of these baffles 40 are directly fixed to the substrate 10, forming a structure similar to a "side wall". The core insulating protective component, the insulating plate 30, is designed to be installed on the edge of the baffles 40 away from the substrate 10. To securely fix the insulating plate 30, small holes of a specified size are precisely set on the front side of the insulating plate 30 (the side facing the operator), and self-tapping screws are used to lock the connection to the top of the baffle 40 located at intervals below (i.e., on both sides or at designated positions) through these holes.

[0043] The baffles 40, erected perpendicular to the substrate 10, form a robust physical barrier on both sides of the connecting terminal 20. This not only significantly enhances the structural rigidity and resistance to external forces of the entire protective device in the first direction, but more importantly, they naturally and clearly separate the connecting terminal 20 and its accommodating space on both sides. This allows the baffles 40 to effectively block the lateral intrusion of foreign objects or tools from the sides (such as in the width direction of the terminal arrangement) even if the internal spaces are interconnected, and to provide preliminary partitioning and isolation for multiple terminals or terminals of different phases, thereby improving the internal safety level.

[0044] The combined design of the baffle 40 and the insulating plate 30 essentially constructs a stable protective cavity in the shape of a "box" or "groove." This structure greatly enhances the overall structural strength and stability of the protective cavity. Whether it's an accidental external impact, pressure applied by tools, or the tensile force that may be generated by the internal wiring harness, this structure provides excellent resistance, ensuring that the safe space accommodating the connection terminal 20 remains stable and provides protection under any operating environment.

[0045] The screws are installed from the front of the insulation plate 30, which facilitates on-site operation, while the baffle 40 serves as a fastening point to ensure stable and secure installation.

[0046] like Figure 1 As shown, in one embodiment of this utility model, at one end in the second direction, the insulating plate 30, the baffle 40, and the substrate 10 together form a through-hole 50 for the electrical wiring harness 1 to pass through. The second direction is perpendicular to the first direction and parallel to the substrate 10. The insulating plate 30, the lateral baffle 40, and the bottom substrate 10 work together to naturally form an open gap, specifically for threading the electrical wiring harness 1 through the through-hole 50. Specifically, in this direction, the baffles 40 on both sides define the width boundary of the through-hole 50, the insulating plate 30 covers a portion of the space at the top, and the substrate 10 provides a supporting plane at the bottom; the edges of the three meet to form this channel.

[0047] The cable entry port 50 is the only controlled and safe spatial channel provided for the connection terminal 20 to enter or exit the electrical wiring harness 1. Without this opening, the connection terminal 20, which is tightly surrounded by the protective cover, would be unable to perform its core function of connecting the wiring harness. This design cleverly reserves the necessary physical path for the introduction and exit of the wiring harness while ensuring overall protection, which is the basis for the practical application of the device.

[0048] Despite the presence of this opening for the wire harness to enter and exit, the wire passage 50 is limited to a specific end in the second direction (rather than multiple sides or locations). The insulating plate 30, baffle 40, and substrate 10 are closely connected or arranged adjacent to each other at the edge of the wire passage 50, so that the main space accommodating the connection terminal 20 remains continuous, closed, or nearly closed, except for the necessary wire harness passage. This design maximizes the integrity of the protective main structure and prevents excessive or large openings from weakening its isolation and protection effect.

[0049] The cable entry port 50, located at a specific endpoint in the second direction, has a clear directional orientation. This helps to guide multiple cable harnesses that need to be connected to different terminals to enter and exit the protected space from a single direction and a specific location. This not only avoids the chaos and potential risks caused by cable harnesses randomly scattering inside or outside the device (such as being squeezed or snagged by other equipment), but also makes the layout of the cable harnesses clearer and neater, which is beneficial for subsequent bundling, fixing, inspection, and maintenance.

[0050] like Figure 1-4As shown, in one embodiment of this utility model, the section of the insulating plate 30 away from the wire passage 50 is bent toward the substrate 10 to form a folded plate 32, and the section of the insulating plate 30 near the wire passage 50 forms a flat plate 31 parallel to the substrate 10. The folded plate 32 can block the end away from the wire passage 50. The folded plate 32 is located at the far end of the device and works together with the upper insulating plate 30, the flat plate 31, the baffles 40 on both sides, and the substrate 10 at the bottom to achieve a more thorough physical wrapping and shielding of the connecting terminal 20 in the far-end direction. This significantly enhances the sealing of the space accommodating the terminal (except for the necessary wire passage 50), and provides better safety shielding, especially for terminals or wire harness connection points installed in this far-end area.

[0051] The folded plate 32 and the insulating plate 30 were originally an integral unit, achieving a unibody structure without the need for additional components through bending. This integrated bending design not only maintains the insulation continuity of the insulating plate 30 itself (without splicing gaps), but also enhances the structural rigidity of the insulating plate 30 in the distal region. The bend creates a natural reinforcing rib effect, giving the original flat plate 31 stronger bending and deformation resistance in this area, helping to resist external pressure or accidental impact from tools, and ensuring the long-term stability and effectiveness of the protective barrier.

[0052] like Figure 4 As shown, in one embodiment of this utility model, the included angle α between the flat plate 31 and the folded plate 32 is an obtuse angle. The core consideration of this design is to adapt to the installation requirements of the limited space inside the electrical box. Compared to right-angle or acute-angle bends (which easily cause the folded plate 32 to be completely pressed against the side wall of the electrical box or even completely obscured), the outward-expanding obtuse angle ensures that the folded plate 32 has sufficient visibility and maneuverability during installation. Installers can clearly observe the specific position of the folded plate 32 from the outside of the box and conveniently deliver self-tapping screws or fixing components to the predetermined position for tightening. This design fundamentally eliminates the risk of the folded plate 32 being "squeezed" into a visual blind spot or physical dead angle due to limited space, making construction inside complex boxes more convenient and reliable.

[0053] like Figure 4As shown, in one embodiment of this utility model, the included angle α between the flat plate 31 and the folding plate 32 is 125-135 degrees, specifically 130°. Based on the obtuse angle design, the specific tilt angle range of the flat folding plate 32 is further defined (e.g., the range of 125° to 135°). This fine-tuned angle design ensures the visibility of the folding plate 32 and the operating space while highly optimizing the shielding effect and structural adaptability of the far-end area. The folding plate 32 extends at this angle, allowing it to closely abut against the side wall of the electrical box or the predetermined mounting surface, while also fully covering the vertically exposed area at the far end of the protective cavity. An excessively large angle may cause the folding plate 32 to expand excessively outward, encroaching on the internal passageway. An excessively small angle weakens the shielding range. This angle range significantly improves the compatibility and protective reliability of the folding plate 32 structure in complex box layouts, making the protective device suitable for more standardized or customized electrical box environments.

[0054] like Figure 1 As shown, in one embodiment of this invention, the side edge of the folding plate 32 away from the flat plate 31 abuts against the substrate 10. The folding plate 32 can completely seal off the end away from the wire passage 50. This embodiment achieves complete physical sealing of the far-end space of the device by limiting the end edge of the folding plate 32 (the side away from the flat plate 31) to directly abut against the substrate 10. This structure makes the folding plate 32 a continuous rigid body from the flat plate 31 to the substrate 10. The horizontal flat plate 31 serves as the top cover, the inclined folding plate 32 serves as the far-end wall, and the end precisely contacts the substrate 10 to form a sealed support point. The three form a stable triangular support structure, completely sealing off all exposed channels of the protective cavity at the end other than the wire passage 50, eliminating the potential risk of any wire ends, tools, or fingers entering the live area from the far end. This abutting design makes the folding plate 32 a key component of the rigid protective barrier, greatly improving the impact resistance and long-term structural stability of the device.

[0055] like Figure 1 , 2 As shown in one embodiment of this utility model, multiple connecting terminals 20 are arranged along a first direction, and each connecting terminal 20 is provided with a baffle 40 on both sides of the first direction. When the connecting terminals 20 are densely arranged along a specific direction (such as the vertical direction), this embodiment provides each connecting terminal 20 with independent baffles 40 on both sides. This baffle 40 layout ensures that each terminal unit obtains a dedicated vertical physical barrier on both sides, thereby achieving mutual electrical isolation between terminal units in a densely arranged environment. The vertical partition formed by the baffle 40 effectively prevents metal tools or wire harness terminal heads from accidentally bridging adjacent terminals during maintenance, physically eliminating the risk of phase-to-phase short circuits caused by accidental contact, and significantly improving the system safety of multi-terminal parallel operation.

[0056] like Figure 1As shown, in one embodiment of this utility model, the two ends of the insulating plate 30 in the first direction are flush with the surfaces of the baffles 40 located at both ends in the first direction. This precise spatial alignment design makes the insulating plate 30 and the vertical baffles 40 form a seamless continuous plane in the overall appearance. Its function is to eliminate any protruding steps or recessed gaps that may appear between the insulating plate 30 and the baffles 40, preventing these irregular structures from becoming points of obstruction for foreign objects or points of leverage for climbing. At the same time, the planar transition structure greatly optimizes the space utilization within the small enclosure, ensuring that the outer contour of the protective device is neat and compact, and preventing protruding parts from interfering with nearby equipment or obstructing the closing of the enclosure door.

[0057] In one embodiment of this utility model, the insulating plate 30 is made of a transparent material, specifically an acrylic plate. The transparency provides the protective device with a "visual" function. Maintenance personnel can directly visually inspect the tightness of internal terminals, cable connections, and the presence of arc burns or oxidation abnormalities without disassembling the protective cover. This non-contact observation ensures operational safety (reducing the risk of electric shock when opening the cover) and significantly improves inspection efficiency. The transparent material also enhances light transmission inside the box, improving the visibility of the protected area in dim environments.

[0058] The insulating board 30 can also be equipped with Chinese "Caution: Electric Shock" signs and icons to further warn workers. Adding the "Caution: Electric Shock" signs and standardized electric shock warning icons to the transparent insulating board 30 creates a dual visual warning system. Its core value lies in breaking down technical barriers through striking graphic language, allowing even non-electrical personnel to instantly identify hazardous areas. The warning signs are in the same field of vision as live parts, forming a visually accessible safety reminder and continuously reinforcing operators' risk awareness. Especially in high-density live environments, this design proactively intervenes in workers' behavior patterns, preventing habitual approaches or contact actions, reducing the probability of misoperation from the source of awareness.

[0059] In summary, this utility model achieves several significant technical effects by incorporating a substrate 10, connecting terminals 20, a baffle 40, and an insulating plate 30 into the isolation device of the conventional island and BOP electrical system of a nuclear power plant, forming a spatial isolation and encapsulation system with a reasonable structure and clear functions. First, the enclosed or near-enclosed space formed between the insulating plate 30 and the substrate 10 effectively covers the connecting terminals 20, constructing a robust physical isolation barrier, significantly improving electrical safety, preventing workers from accidentally touching live terminals, and eliminating the risk of electric shock. Second, this structure also effectively prevents foreign objects, metal fragments, or tools from accidentally falling into the terminal area, reducing the risk of electrical accidents such as short circuits and grounding, and improving the stability and reliability of system operation. Furthermore, the combined design of the baffle 40 and the insulating plate 30 enhances structural strength and resistance to external forces, forming a stable "box-shaped" protective cavity. The cable entry / exit port 50 allows for the orderly entry and exit of connecting wires, ensuring reasonable wiring while maintaining the integrity and safety of the main structure. The folding plate 32 further encloses the remote space, and its specific obtuse angle design balances shielding and ease of operation. The integrated bending structure enhances rigidity and compressive strength, improving the stability of the protection system. Baffles 40 are provided on both sides of the connecting terminal 20 to achieve physical isolation between terminals, effectively preventing phase-to-phase short circuits and improving the electrical safety level of multi-terminal systems. The insulating plate 30 is made of transparent material, which not only facilitates non-contact observation and improves maintenance efficiency, but also allows for the addition of warning signs, strengthening visual warning effects and reducing the risk of misoperation. Combining the above structural design and material application, this utility model achieves multiple technical effects such as structural stability, safe isolation, prevention of accidental contact, electrical protection, visual inspection, and human-caused warnings, significantly improving the safety, reliability, and maintenance convenience of electrical devices in high-voltage environments.

[0060] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0061] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0062] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0063] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0064] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0065] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0066] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.

[0067] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0068] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. An isolation device for the electrical system of the conventional island and BOP of a nuclear power plant, characterized in that, The isolation device for the conventional island and BOP electrical system of the nuclear power plant includes: substrate; A connection terminal is disposed on the substrate, and the connection terminal is used to connect an electrical wiring harness; An insulating plate, at least a portion of the substrate is arranged at a distance from the insulating plate to form a space for accommodating the connection terminal.

2. The isolation device for the conventional island and BOP electrical system of a nuclear power plant according to claim 1, characterized in that, The connection terminal is provided with baffles on both sides of the first direction, the baffles having their surfaces perpendicular to the substrate and the first direction. The baffles have their edges connected to the substrate. The insulating plate is provided on the side edge of the baffle away from the substrate. The first direction is parallel to the substrate.

3. The isolation device for the conventional island and BOP electrical system of a nuclear power plant according to claim 2, characterized in that, At one end in the second direction, the insulating plate, the baffle, and the substrate together form a passage for the electrical wiring harness to pass through, the second direction being perpendicular to the first direction and parallel to the substrate.

4. The isolation device for the conventional island and BOP electrical system of a nuclear power plant according to claim 3, characterized in that, The section of the insulating plate away from the wire passage is bent toward the substrate to form a folded plate, and the section of the insulating plate near the wire passage is parallel to the substrate to form a flat plate.

5. The isolation device for the conventional island and BOP electrical system of a nuclear power plant according to claim 4, characterized in that, The angle between the flat plate and the folding plate is an obtuse angle.

6. The isolation device for the conventional island and BOP electrical system of a nuclear power plant according to claim 5, characterized in that, The angle between the flat plate and the folding plate is 125 degrees to 135 degrees.

7. The isolation device for the conventional island and BOP electrical system of a nuclear power plant according to claim 4, characterized in that, The side edge of the folding plate away from the flat plate abuts against the substrate.

8. The isolation device for the conventional island and BOP electrical system of a nuclear power plant according to claim 2, characterized in that, The connection terminals are provided in multiple ways along the first direction, and each connection terminal is provided with a baffle on both sides of the first direction.

9. The isolation device for the conventional island and BOP electrical system of a nuclear power plant according to claim 1, characterized in that, The insulating plate is flush with the surface of the baffle located at both ends in the first direction at both ends.

10. The isolation device for the conventional island and BOP electrical system of a nuclear power plant according to claim 1, characterized in that, The insulating plate is made of a transparent material.

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