Simple lightning protection and overvoltage distribution box device
By integrating multiple protective components into the distribution box device, the problem of insufficient lightning strike and overvoltage protection in existing distribution boxes is solved, achieving a comprehensive protection effect, improving the safety and stability of the equipment, and reducing the risk of equipment damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA HUAYE GROUP
- Filing Date
- 2025-04-28
- Publication Date
- 2026-05-29
AI Technical Summary
Existing distribution boxes lack systematic lightning and overvoltage protection designs, making it difficult to withstand surge current damage to equipment, which may paralyze security systems and bring serious safety hazards.
A simple lightning protection and overvoltage distribution box device was designed, which integrates a residual current circuit breaker, an overvoltage protector, an AC surge protector, a DC surge protector, a network lightning protection device, and a switching power supply to form a comprehensive protection system. It adopts a metal shell and is grounded with a grounding resistance of no more than 4 ohms, and works in conjunction with a variety of protection components.
It effectively prevents equipment damage caused by lightning strikes and overvoltage, reduces the risk of security system failure, improves electrical safety performance, ensures power supply stability and network signal transmission stability, extends equipment lifespan and reduces maintenance costs.
Smart Images
Figure CN224305222U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of distribution box technology, and in particular to a simple lightning protection and overvoltage protection distribution box device. Background Technology
[0002] In the current booming global infrastructure construction, overseas engineering projects face complex and severe challenges. Due to unique climatic conditions, they frequently encounter extreme weather such as lightning and torrential rain. Summer lightning activity is particularly frequent, and many sophisticated security electronic devices installed in open outdoor areas are not only exposed to direct lightning strikes but also highly susceptible to induced lightning and operational overvoltages due to long-distance network cable transmission. Existing distribution boxes only possess basic power distribution functions and lack systematic lightning and overvoltage protection designs, making them unable to withstand surge current damage to equipment and potentially causing security system failures, posing serious safety hazards. Therefore, this utility model proposes a simple lightning and overvoltage protection distribution box device to ensure the safe and stable operation of critical equipment in overseas projects. Utility Model Content
[0003] The purpose of this utility model is to address the problem in the background technology that distribution boxes only have basic power distribution functions, lack systematic lightning and overvoltage protection designs, are difficult to resist the damage of surge current to equipment, may cause the security system to be paralyzed, and bring serious safety hazards. This invention proposes a simple lightning and overvoltage protection distribution box device.
[0004] The technical solution of this utility model is as follows: A simple lightning protection and overvoltage distribution box device, comprising a distribution box, wherein the distribution box is internally equipped with a residual current circuit breaker, an overvoltage protector, an AC surge protector, a DC surge protector, a network surge protector, a switching power supply, and a five-hole socket; the input terminal of the residual current circuit breaker is connected to an external power supply, and its output terminal is connected to the input terminals of the overvoltage protector, the AC surge protector, the DC surge protector, and the switching power supply, respectively; the output terminals of the overvoltage protector, the AC surge protector, the DC surge protector, and the switching power supply are all connected to the five-hole socket; the input terminal of the network surge protector is connected to an external network line, and its output terminal is connected to the equipment requiring network protection; and the network surge protector, the residual current circuit breaker, the overvoltage protector, the AC surge protector, the DC surge protector, the switching power supply, and the five-hole socket together constitute an electrical connection circuit.
[0005] Optionally, the distribution box 1 is made of metal, and the outer shell of the distribution box 1 is grounded with a grounding resistance of no more than 4 ohms.
[0006] Optionally, the overvoltage protector 3 is a zinc oxide varistor type overvoltage protector with a rated voltage of 220V-440V and an operating voltage range of 250V-500V.
[0007] Optionally, the AC surge protector 4 is a common-mode and differential-mode protection type, with a nominal discharge current of not less than 5kA and a maximum discharge current of not less than 10kA.
[0008] Optionally, the DC surge protector 5 has an operating voltage range of 12V-48V, a nominal discharge current of not less than 3kA, and a maximum discharge current of not less than 6kA; the DC surge protector internally adopts a combination structure of semiconductor discharge tube and TVS diode.
[0009] Optionally, the network surge protector 6 is an RJ45 interface type with an insertion loss of no more than 0.5dB and a standing wave ratio of no more than 1.5.
[0010] Optionally, the output voltage of the switching power supply 7 is a stable 12V or 24V, and the output current is 1A-10A depending on the actual load requirements.
[0011] In summary, this application includes at least one of the following beneficial technical effects:
[0012] This utility model integrates multiple protection components such as overvoltage protectors, AC surge protectors, DC surge protectors, and network lightning protection devices, forming a comprehensive lightning and overvoltage protection system compared to traditional distribution boxes that only have basic power distribution functions. When encountering lightning strikes or surge currents in the power grid, the various protection components work together. The overvoltage protector can quickly respond to abnormal voltages, the AC and DC surge protectors can discharge and clamp surge currents in AC and DC lines respectively, and the network lightning protection device effectively protects network lines, avoiding equipment damage caused by surge impacts. This greatly reduces the risk of security systems being paralyzed due to power anomalies and significantly improves electrical safety performance.
[0013] Furthermore, this utility model can output a stable 12V or 24V voltage via a switching power supply, and the output current can be flexibly adjusted from 1A to 10A according to actual load requirements. This not only provides a stable and reliable power supply for various devices but also ensures the stability of the power supply voltage and current through the synergistic effect of multiple protection components. Simultaneously, the distribution box is made of metal with a grounding resistance of no more than 4 ohms, effectively preventing static electricity accumulation and leakage risks, creating a safe operating environment for the internal equipment. In addition, the network surge protector uses an RJ45 interface and features low insertion loss (no more than 0.5dB) and low VSWR (no more than 1.5), ensuring the stability and integrity of network signal transmission, improving the device's compatibility and applicability to different devices, extending equipment lifespan, and reducing equipment maintenance costs. Attached Figure Description
[0014] Figure 1 This is a block diagram of a simple lightning protection and overvoltage distribution box device.
[0015] Figure label:
[0016] 1. Distribution box; 2. Residual current circuit breaker; 3. Overvoltage protector; 4. AC surge protector; 5. DC surge protector; 6. Network lightning protection device; 7. Switching power supply; 8. Five-hole socket. Detailed Implementation
[0017] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.
[0018] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.
[0019] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example
[0022] like Figure 1As shown, this utility model proposes a simple lightning protection and overvoltage distribution box device, including a distribution box 1. The distribution box 1 internally houses a residual current circuit breaker 2, an overvoltage protector 3, an AC surge protector 4, a DC surge protector 5, a network lightning protection device 6, a switching power supply 7, and a five-hole socket 8. The input terminal of the residual current circuit breaker 2 is connected to an external power supply. The residual current circuit breaker 2 internally houses a zero-sequence current transformer, a residual current trip unit, and main contacts. The zero-sequence current transformer continuously monitors the residual current in the circuit. When the residual current exceeds a set threshold, the residual current trip unit quickly activates, driving the main contacts to disconnect the circuit, thereby achieving rapid protection against circuit leakage faults and ensuring electrical safety. The output terminal of the residual current circuit breaker 2... The circuit breaker 6 is connected to the input terminals of the overvoltage protector 3, AC surge protector 4, DC surge protector 5, and switching power supply 7, respectively. The switching power supply 7 and AC surge protector 4 are connected through a circuit breaker or socket. The output terminals of the overvoltage protector 3, AC surge protector 4, DC surge protector 5, and switching power supply 7 are all connected to the five-hole socket 8, and multiple five-hole sockets are provided. The input terminal of the network surge protector 6 is connected to the external network line, and the output terminal is connected to the equipment that needs network protection. The network surge protector 6, together with the residual current circuit breaker 2, overvoltage protector 3, AC surge protector 4, DC surge protector 5, switching power supply 7, and five-hole socket 8, constitute the electrical connection circuit of the switching power supply 7.
[0023] Furthermore, the distribution box 1 is made of metal, and the outer shell of the distribution box 1 is grounded with a grounding resistance of no more than 4 ohms. The metal material is stainless steel, which has good corrosion resistance and strength, effectively protecting the internal electrical components and preventing external mechanical damage. In addition, stainless steel has good conductivity, which facilitates the grounding of the outer shell and rapid discharge of lightning current.
[0024] Secondly, the overvoltage protector 3 is a zinc oxide varistor type overvoltage protector with a rated voltage of 220V-440V and an operating voltage range of 250V-500V. The zinc oxide varistor exhibits a high impedance state under normal voltage. When the voltage exceeds the operating voltage, its impedance drops rapidly, which can quickly conduct the overvoltage to the ground, thereby protecting downstream equipment from excessive voltage impact. In addition, this type of overvoltage protector has a fast response speed and a large current capacity.
[0025] Furthermore, the AC surge protector 4 is a common-mode and differential-mode protection type, with a nominal discharge current of not less than 5kA and a maximum discharge current of not less than 10kA. The common-mode and differential-mode protection structure can simultaneously protect against surge voltages between phase and ground, and between phases. It adopts a multi-level protection circuit design, which can effectively absorb and discharge surge energy of different intensities, thereby improving the protection effect on AC power supply lines.
[0026] In addition, the DC surge protector 5 has an operating voltage range of 12V-48V, a nominal discharge current of not less than 3kA, and a maximum discharge current of not less than 6kA. The DC surge protector uses a combination structure of semiconductor discharge tubes, TVS diodes, etc., which can quickly respond to and suppress transient overvoltages on DC lines to prevent damage to DC equipment due to power surges.
[0027] Specifically, the network surge protector 6 is an RJ45 interface type with an insertion loss of no more than 0.5dB and a standing wave ratio of no more than 1.5. The RJ45 interface type network surge protector adopts technologies such as transformer isolation and gas discharge tube, which can ensure stable transmission of network signals while protecting against lightning and overvoltage. The low insertion loss and low standing wave ratio ensure the integrity and transmission speed of network data.
[0028] Finally, the output voltage of the switching power supply 7 is a stable 12V or 24V, and the output current is 1A-10A depending on the actual load requirements. The switching power supply adopts pulse width modulation (PWM) technology, which realizes voltage transformation and stable output through the rapid switching of high-frequency switching devices. It has the characteristics of high efficiency, small size and light weight, and can provide a stable and reliable DC power supply for loads with different power requirements.
[0029] The working principle of this embodiment is as follows: An external power supply is connected to the input terminal of the residual current circuit breaker 2. The zero-sequence current transformer inside the circuit breaker monitors the residual current of the circuit in real time. When the residual current is normal, the main contacts remain closed, and the external power supply transmits electrical energy to the input terminals of the overvoltage protector 3, AC surge protector 4, DC surge protector 5, and switching power supply 7 through the output terminal of the residual current circuit breaker 2.
[0030] If a leakage occurs in the circuit, when the residual current exceeds the set threshold, the leakage trip device will quickly activate, driving the main contacts to disconnect the circuit, cut off the power supply, and prevent leakage accidents from occurring.
[0031] Under normal power supply conditions, the overvoltage protector 3 is in standby mode. Once the circuit voltage exceeds its operating voltage range (250V-500V), the impedance of the zinc oxide varistor drops rapidly, introducing the overvoltage to the ground and protecting downstream equipment.
[0032] The AC surge protector 4, with its common-mode and differential-mode protection structure, protects against surge voltages between phase and ground, and between phases. When a surge occurs, its multi-stage protection circuit activates to absorb and discharge surge energy. The DC surge protector 5, designed for 12V-48V DC circuits, detects transient overvoltages on the DC line, and its internal semiconductor discharge tubes and TVS diodes respond rapidly to suppress the overvoltage.
[0033] The switching power supply 7 uses pulse width modulation (PWM) technology to convert the input power into a stable 12V or 24V DC output. The output current is adjusted between 1A and 10A according to the actual load requirements to power DC devices connected to the five-hole socket 8.
[0034] For external network lines, their signals are connected to the input terminal of the network surge protector 6. This protector uses technologies such as transformer isolation and gas discharge tubes to ensure that the network signal is stably transmitted to the equipment that needs network protection while protecting against lightning and overvoltage, with low insertion loss (not greater than 0.5dB) and low standing wave ratio (not greater than 1.5).
[0035] The electrical energy processed by the overvoltage protector 3, AC surge protector 4, and DC surge protector 5, as well as the electrical energy output from the switching power supply 7, all converge at the five-hole socket 8. Since the five-hole socket 8 can provide a stable and safe power supply for various AC and DC electrical devices, meeting the power needs of different devices, and the distribution box 1, made of metal and with a grounded casing (grounding resistance not exceeding 4 ohms), can quickly discharge lightning current, ensuring the safe operation of the entire system.
[0036] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.
Claims
1. A simple lightning protection and overvoltage distribution box device, characterized in that, The distribution box (1) includes a leakage circuit breaker (2), an overvoltage protector (3), an AC surge protector (4), a DC surge protector (5), a network lightning protection device (6), a switching power supply (7), and a five-hole socket (8). The input terminal of the residual current circuit breaker (2) is connected to an external power supply, and its output terminal is connected to the input terminals of the overvoltage protector (3), AC surge protector (4), DC surge protector (5), and switching power supply (7), respectively. The output terminals of the overvoltage protector (3), AC surge protector (4), DC surge protector (5), and switching power supply (7) are all connected to the five-hole socket (8). The input terminal of the network surge protector (6) is connected to the external network line, and the output terminal is connected to the equipment that needs network protection. The network surge protector (6), together with the leakage circuit breaker (2), overvoltage protector (3), AC surge protector (4), DC surge protector (5), switching power supply (7), and five-hole socket (8), form an electrical connection circuit.
2. The simplified lightning protection and overvoltage distribution box device according to claim 1, characterized in that, The distribution box (1) is made of metal, and the outer shell of the distribution box (1) is grounded with a grounding resistance of no more than 4 ohms.
3. The simplified lightning protection and overvoltage distribution box device according to claim 1, characterized in that, The overvoltage protector (3) is a zinc oxide varistor type overvoltage protector with a rated voltage of 220V-440V and an operating voltage range of 250V-500V.
4. A simplified lightning protection and overvoltage distribution box device according to claim 1, characterized in that, The AC surge protector (4) is a common-mode and differential-mode protection type, with a nominal discharge current of not less than 5kA and a maximum discharge current of not less than 10kA.
5. A simplified lightning protection and overvoltage distribution box device according to claim 1, characterized in that, The DC surge protector (5) operates at a voltage range of 12V-48V, with a nominal discharge current of not less than 3kA and a maximum discharge current of not less than 6kA. The DC surge protector uses a combination structure of semiconductor discharge tube and TVS diode.
6. A simplified lightning protection and overvoltage distribution box device according to claim 1, characterized in that, The network surge protector (6) is an RJ45 interface type, with an insertion loss of no more than 0.5dB and a standing wave ratio of no more than 1.
5.
7. A simplified lightning protection and overvoltage distribution box device according to claim 1, characterized in that, The output voltage of the switching power supply (7) is a stable 12V or 24V, and the output current is 1A-10A depending on the actual load requirements.