Lightning Protection of Computer Network System

Abstract: The lightning protection information of computer network system is provided to you by excellent flowmeter and flowmeter manufacturers. 0 Introduction The equipment of the computer network system contains a large number of ultra-large-scale semiconductor integrated circuit modules, and its overvoltage and overcurrent capabilities are extremely fragile. Once struck by lightning, it will definitely cause damage or personal injury. Therefore, the country's lightning protection for computer network systems. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of lightning protection articles for computer network systems. 0 Introduction The equipment of the computer network system contains a large number of ultra-large-scale semiconductor integrated circuit modules, and its overvoltage and overcurrent capabilities are extremely fragile. Once struck by lightning, it will definitely cause damage or personal injury. Therefore, the state has formulated relevant laws, regulations and corresponding standards and norms for the lightning protection of computer network systems. According to the actual environment of the computer network system of Hebei Electric Power Company, this paper introduces the lightning protection scheme of the computer network system of Hebei Electric Power Dispatching Center. In the specific implementation, the following standards are complied with: GB50057-94 Building Lightning Protection Design Specification, GB50174-93 Electronic Computer Room Design Specification, GB2887-88 Computer Site Safety Requirements, GB2887-89 Computer Site Technical Document, GB50054-95 Low-voltage Electrical Appliance Design Specifications, GB3482-83 lightning strike test of electronic equipment, GB11032-89 AC gapless arrester, GA173-1998 computer information system lightning protection device, IEC1312 lightning current electromagnetic pulse protection, IEC61643SPP power supply lightning protection device, VDE0675 overvoltage protector. 1 Grounding system The provincial company building consists of a 25-story circular main building and the south and north annexes located on the west side of the main building. The south and north annexes are east-west, with a north-south interval of 15m, and the heights are 9 floors and 5 floors respectively. The computer rooms are located on the 13th floor of the main building, the 2nd floor of the north wing building, and the 4th floor of the south wing building. The main building has the conditions of preventing direct lightning strike, and has lightning rods, down conductors, and grounding bodies. The measured grounding resistance of the grounding wire is less than 1Ω. The grounding grids of the south and north annex buildings are connected with the grounding grid of the main building. During the construction of each computer room, a grounding grid shall be installed and connected to the steel reinforcement grid of the building. The grounding grid adopts 5mm×The 30mm copper bars are laid in a mesh under the floor of the computer room. The power sockets and signal grounds of the UPS power supply system in the computer room are connected to the grounding grid within the shortest distance. 2 Integrated wiring In order to prevent damage caused by unreasonable wiring during lightning strikes, the following measures are taken during wiring: ① Power cables and network cables are installed in separate slots, and data sockets and power sockets are kept at a certain distance (1m); ② WAN cable and LAN cable ③The two ends of the cable tray on the ceiling are grounded; ④The two ends of the metal protective pipe in the wall are grounded; ⑤The cable shaft in the middle of the building is selected as the dedicated channel for signal cables; Switch ports use RJ45S-E100/4-F and UR-EJ45×16 multi-port network lightning arrester. 3 Power system lightning protection and overvoltage protection The power of the computer room is introduced from the main power distribution room of the building, and the two-way and three-phase automatic switching is performed. The high-voltage side has lightning protection measures, and the low-voltage side is mainly considered. a. Install first-level lightning protection at the low-voltage power distribution cabinets in the computer rooms of the round building, the south wing and the north wing, and use the German OBO lightning protection product UPl20 lightning protection box with high flow rate; It can also achieve maximum protection, and the maximum flow rate is 120kA per line. Therefore, the lightning protection box can withstand part of the lightning current from the direct lightning strike. When the line is overloaded, the circuit breaker inside the lightning protection module will automatically disconnect the failed lightning protection module from the main circuit, and at the same time send out sound and light alarms and remote signaling alarms. b. The input end of UPS in each computer room adopts V20-C/3+NPE/AS lightning protection device as the second-level lightning protection; the lightning protection device uses 3 zinc oxide varistor modules to limit the voltage between the phase line and the neutral line , so that the overvoltage is clamped to a very low amplitude, and the varistor releases a large discharge current in a very short time; between the zero line and the ground line, the device uses a high-energy gap discharge module to Limit over-voltage; if the surge arrester is overloaded due to excessive mains fluctuation or fault, it can automatically act safely to disconnect the surge arrester from the main circuit to avoid short-circuit damage caused by continuous opening of the surge arrester. c. CNS-3-D lightning protection socket is selected as the third-level lightning protection for the input end of each server power supply line in the main engine room of the south wing building. d. The lightning protection configuration of network equipment is shown in Figure 1. 4 Conclusion The lightning protection scheme of the computer network system of the dispatching building of Hebei Electric Power Company meets the requirements of the lightning protection safety of the system, and can ensure the reliable operation of the computer network system under special weather conditions. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Lightning Protection of Computer Network System'

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