The lightning protection device installed on the building can only protect the building from being directly damaged by lightning. It is called external lightning protection; it cannot protect the electrical equipment in the building from being damaged by lightning overvoltage or surge voltage generated by lightning induction. , it is called internal lightning protection. Schematic diagram of comprehensive lightning protection for buildings Lightning overvoltage can be generated in two ways: when lightning occurs in the distance, the transient electromagnetic field generated by the lightning induces a transient surge voltage on the power supply line or signal line, which can be conducted along the line to the electrical equipment of the building. The insulation of electrical equipment is damaged; the other is that lightning or lightning strikes near the building directly strike the building. A strong transient electromagnetic field is generated around the lightning current entering the ground, which is directly induced on the power supply lines or signal lines of the electrical equipment in the building. Produce transient overvoltage and damage the insulation of electrical equipment. The energy of this surge is much greater than that of a surge induced and conducted on a wire by a distant lightning strike into a building. After the building is equipped with an external lightning protection device, the air-termination device on the roof plays a role in guiding lightning. Although the lightning protection device can safely discharge the lightning current into the ground, protecting the building. However, the strong transient electromagnetic field generated by the lightning current caused by direct lightning strikes increases the risk that the insulation of electrical equipment in the building will be damaged by the transient overvoltage induced in power lines and signal lines. This overvoltage can also cause hazards due to impedance coupling from grounding devices along distribution lines and into adjacent buildings. As a well-known lightning protection brand in China, Anhui Jinli has been committed to the electrical safety of electrical systems and focused on lightning protection technology for electrical systems. Among them, the research and development and production of lightning arresters are at the forefront of the industry.

With the continuous development of social science and technology, surge protectors (SPD) have become an indispensable electrical protection component in modern buildings and important facilities. So, how to choose a surge protector factory? 1. Regarding product questions: The selection of a surge protector mainly depends on the following parameters: Maximum continuous operating voltage (Uc): The maximum effective AC power frequency voltage or DC voltage that is allowed to be permanently applied to the surge protector. Its value is equal to the rated voltage. Maximum impulse current (Iimp): Usually the impulse current test with 10/350us waveform is used, which belongs to the Class I classification test, which means that the SPD can withstand a maximum current impulse. Maximum discharge current (Imax): According to the 8/20us waveform test, the test belongs to the Level II classification test. The maximum discharge current that can be withstood through the action load test. Protection voltage Up: The product should be marked with protection voltage Up. Up should be less than the measurement limit voltage and at the same time less than the impulse withstand voltage value of the equipment. 2. Inspect factory strength and quality management system： Anhui Jinli's products are widely used in basic industries and emerging industries such as electric power, new energy, railways, rail transit, industrial automation, metallurgy, and chemical industry. Complete certifications, worry-free after-sales, and both production capacity and the company's internal management system are at the forefront of the industry. Production strength: The company's R&D, production, and office space covers an area of 56,000 square meters, including 400 square meters of testing area. Testing capabilities: It has all the testing capabilities required by national and international standards such as GB/T18802.11/21/31, IEC61643-11/21/31, UL1449, etc., and has passed on-site testing by UL witness laboratories in the United States and TÜV Rheinland manufacturers. Laboratory certification. Product certification: EU RoHS certification, Ministry of Industry and Information Technology Tel certification, railway industry CRCC certification, EU CE certification, US UL certification, and German TÜV certification.

With the widespread use of new energy in recent years, wind energy, solar energy, hydropower, etc. have gradually occupied a certain market in the energy market, effectively alleviating the energy crisis caused by the depletion of traditional energy sources. Among them, the widespread use of solar energy occupies an important position in the new energy market. Not only industrial and commercial power generation but also residential solar power generation is becoming more and more popular in the market. Therefore, lightning protection for solar energy is extremely important. The main steps for lightning protection of photovoltaic power plants are as follows: 1. According to the range, height, and installation position of the solar cell array, and by the requirements of GB50057 "Design Code for Lightning Protection of Buildings", lightning protection pins, lightning strips, lightning wires, and lightning nets should be installed to prevent direct lightning strikes. The height and number of lightning rods should be calculated according to the rolling ball method and installed in a reasonable layout. 2. Large photovoltaic power stations can be equipped with air-termination pins and towers to protect against direct lightning strikes. The air-termination pins installed in large-scale photovoltaic power stations should be at least 3m away from the edge of the photovoltaic cell module bracket. The grounding points of the down conductor for direct lightning protection and the down conductor for safety protection on the ground network should be at least 10m apart. The cross-sectional area of the lightning-receiving wire should be determined from the length and width of the photovoltaic cell module group and is generally not less than 25mm2 steel strand. 3. When photovoltaic cell modules are installed on the roof slope, lightning strips should be installed. The air-termination strap should not be connected to the aluminum alloy frame and brackets around the solar panel. The air-terminating tape should be installed with a down conductor every 18m to connect to the ground grid. 4. The aluminum alloy frames and brackets around the solar panels should be connected and connected at equal potential. According to the size of the battery module, more than two grounding wires should be installed through the steel pipe or connected to the grounding grid with a shielded wire as a safety protection ground. 5. The entry points of the down conductor for direct lightning protection and the down conductor for safety protection on the ground network should be more than 10m apart to prevent high-potential counterattacks from lightning strikes. As an innovative lightning protection enterprise in China, Jinli Electric has focused on the R&D, production, testing, and basic research of surge protectors and lightning protection-related products for 18 years since its establishment, with users as the center. Not only provide high-quality products that meet user needs but also ...

As a well-known lightning protection brand in China, Anhui Jinli has been committed to the electrical safety of electrical systems and focused on lightning protection technology for electrical systems. It has 18 years of research and development experience. The backup protectors and surge protectors produced are of various types, novel styles, and high quality, which can meet the needs of different customers. To better serve customers, it should be noted that backup protectors and surge protectors are not the same. They are different in function, installation location, and role. 1) Surge protector. Also known as overvoltage protectors, they are used to protect electronic equipment from overvoltage damage. When voltage surges or transients occur in the circuit, surge protectors can guide these overvoltages to the ground or normal power supply. To protect the protected equipment, it is usually installed in front of the terminal equipment. 2) Backup protector. It is a backup power device that is used to provide a short-term power guarantee when the main power supply fails or the power supply is interrupted. It can enable the power equipment to maintain normal operation under abnormal conditions such as power outage, unstable voltage, high or low frequency, etc. Electrical equipment operates normally and is usually installed in front of a surge protector. It should be noted that the back protector must be installed. It cooperates with the surge protector and is indispensable to protect the circuit from damage.

According to the National Fire Protection Association, a study by Georges, Thomas, and others concluded that modern power grids are inherently susceptible to overvoltage because they employ equipment with low insulation levels, which is the root cause of more than 40% of unexpected electronic equipment failures. The cause was a lightning strike. Therefore, the field performance of surge protective devices (SPDs) has been extensively studied since the surge protection of low-voltage power supplies, where the power grid's reliability is crucial.  Accurate SPD modeling is necessary to assess overvoltage mitigation properly, assess stress on protected equipment, and conduct sound risk assessment studies for direct and indirect lightning-related surges. The experimental method for modeling they proposed is: a generalized equivalent lumped circuit model for surge protectors, which includes: 1) Integrating the inherent capacitance C S and switch S(V,t) of the voltage switching element (spark gap, gas tube, etc.), the switch is closed when overvoltage causes SPD to flash; if there is no voltage switching element (voltage limiting SPD), then the rectangular dashed box in Figure 4 can be replaced by an ideal short circuit. 2) Nonlinear current-dependent resistance R(i); the latter is mainly dominated by the field-dependent resistivity of voltage-limiting components (varistors, avalanche diodes, etc.), and is supplemented by the current-dependent arc resistance of voltage switching components; R(i) also Contains the inherent resistance of the SPD conductive path. 3) Inductance L, related to the inherent inductance of the SPD conductive path and the similar inductive behavior of the protection components, especially the hole effect when conducting surge current through the varistor. 4) Capacitance C R represents the inherent capacitance of the voltage limiting component; resistance R S determines the minimum resistive leakage current of the voltage switching component; if there is no voltage limiting component (voltage switch SPD), C R can be replaced by an ideal open circuit, and C S, R S should be connected in parallel to R(i) and S(V,t) in series, that is, between B and C'. Since its establishment in 2006, Jinli Electric has been deeply involved in surge protectors for nearly two decades, adhering to the corporate mission of "creating the world's No. 1 lightning protection brand to protect users from lightning intrusion". Self-developed and produced surge protectors for charging piles, such as JLSP-BC15, are deeply loved and trusted by the majority of users.

The surge protector, referred to as SPD, is installed on a 35MM standard rail. For fixed SPD surge protectors, the following steps should be followed for routine installation. First, determine the discharge current path. Second, are the wires marked for the extra voltage drop caused at the equipment terminals? Third, to avoid unnecessary inductive loops, the PE conductor of each device should be marked. Fourth, establish an equipotential connection between the equipment and the Surge protective device. Fifth, it is necessary to coordinate the energy of multi-level SPD. Precautions during installation: The most important thing during installation is the power-off operation. In addition, to limit the inductive coupling between the protected part and the unprotected equipment part after installation, certain measurements are required. Usually, we separate protected conductors from unprotected conductors, and also separate ground wires. Install according to the guide rail, and check whether the equipment can work normally after successful installation. As a well-known lightning protection brand in China, Anhui Jinli has been committed to the electrical safety of electrical systems and focused on lightning protection technology for electrical systems. For the installation of surge protectors, we provide detailed installation instructions with each product. If you encounter problems at the same time, the technical department can remotely guide the installation. At the same time, we will make regular return visits and repairs. Provide customers with worry-free after-sales service.

The application areas of SPD products include substation, substation, distribution room, switch box, and transformer type. Anhui Jinli's products are widely used in basic and emerging industries such as electric power, new energy, railways, rail transit, industrial automation, metallurgy, and the chemical industry. Substations, substations, switchyards, and divisions are common in railway systems. According to Shipping Letter [2017] No. 240, the Transportation Bureau of China Railway Corporation issued the "Implementation Plan for Optimizing the Settings of Surge Protectors in Traction Substations". Derived shielding cabinet products such as power supply surge protectors and signal surge protectors are used in Multiple locations; Power distribution rooms use surge protectors and intelligent collection terminal products in the PC segment and MCC segment of traditional industries; Box-type transformers are widely used in new energy wind power and photovoltaic industries. Low-voltage surge protectors, high-voltage metal oxide arresters, and intelligent collection devices are also widely used. Although the application environments and industries are different, with the rapid development of surge protector products in the direction of intelligence and digitalization, from fault trip remote signaling, and lightning counting, to peak detection, waveform recovery, life prediction, etc., lightning protection products have gradually been integrated into The booming digital wave.

From October 27 to 28, 2023, Anhui Jinli hosted the second lightning protection technology seminar with the theme of "New Energy Power Generation System + Traditional Distribution System Lightning Defense" in its park. In the compact seminar, The experts discussed the application of lightning protection in different industries and also proposed the direction of more detailed implementation plan research. The trip to Beijing, the capital, in November 2023 is a further extension of the application of lightning protection technology in various industries in the seminar. We discussed smart lightning protection system solutions with the rail transit field design institute; we discussed the installation and installation of lightning protection products with complete sets of customers. Selection; discussed typical lightning accidents at photovoltaic sites and new lightning protection solutions with the New Energy Field Design Institute. As a well-known lightning protection brand in China, Anhui Jinli has been committed to the electrical safety of electrical systems and focused on lightning protection technology for electrical systems. Overall lightning protection for the system is the most effective way to reduce personal injuries and equipment damage. Overall, lightning protection includes lightning protection products, engineering, and lightning protection detection, but also has developed new businesses such as lightning monitoring, ground resistance monitoring, and lightning early warning in recent years. From its establishment to the present, in the past 18 years, we have focused on the R&D, production, testing, and basic research of surge protectors and lightning protection-related products, we are user-centered, not only providing high-quality products that meet user needs but also helping users solve pain points in lightning protection.