The security room is usually located in the building of Party A. The lightning protection and power supply system has been used for lightning protection. The security of the 220vac electricity is safe. According to the above “Basic Design Points for Safe Electricity Supplyâ€, it is sufficient.
The lightning protection of the security system is a systematic project. The "complete" design of the overall lightning protection of the entire system is eliminated, and a partial "lightning protection of the engine room" and the "equipotential connection" of the engine room cannot solve the lightning protection of the system. If the front camera pole is designed for lightning protection, or if the system uses a large number of grounding lightning protection devices, then even a good “airfield lightning protection†can hardly guarantee the safety of the system equipment.
The system is single-point grounding - the engine room host chassis is safe to ground, only used to discharge the system static charge, the engine room anti-inductive lightning is also considered line protection is enough.
The lightning protection concept of the security project 1 The starting point and ultimate goal of the lightning protection design of the security system must be to ensure the safety of the system equipment and operation. This should be clearly defined in the relevant standards of the industry. Anti-direct lightning protection should be protected by an independent lightning rod; anti-induced lightning protection is a good line protection. Pole lightning rods, grounding surge protectors, grounding surge protectors, if used for security system lightning protection is equal to planting a time bomb.
2 Establish the concept of “wide-area information system electromagnetic compatibility designâ€: “System single-point grounding†is the first element of the lightning protection, anti-interference and system safety design of security systems and the basic principles of security design.
3 Doing security and lightning protection It is necessary to understand some lightning strike probability knowledge, so as to reduce the blindness of lightning protection design and investment, so as not to be misled to design a truly safe and effective lightning protection project. For example, a 3 or 5 meter high independent house or outdoor camera pole, the probability of lightning strike in the north is far less than 0.01 times per year, that is to say, "a hundred years no chance" a lightning strike, it is necessary to do direct lightning protection? Someone is calling you to do, Every outdoor pole needs to be done. Call you to buy a professional stainless steel pole lightning rod and make a professional grounding net (cage); a few hundred yuan outdoor 3, 5 meters high pole, according to the pole lightning rod design, to invest up to Thousands of thousands to 1,200,000 yuan, apparently this is a commercial purpose, let people when the "fat" slaughtered, the result is a "self-destruction" system. Since the Three Gorges Project took into consideration the safety of life and property in several provinces, it was not designed for a hundred years. Is it necessary for a security pole to do so?
The lightning protection of the security system is a systematic project. The "complete" design of the overall lightning protection of the entire system is eliminated, and a partial "lightning protection of the engine room" and the "equipotential connection" of the engine room cannot solve the lightning protection of the system. If the front camera pole is designed for lightning protection, or if the system uses a large number of grounding lightning protection devices, then even a good “airfield lightning protection†can hardly guarantee the safety of the system equipment.
The system is single-point grounding - the engine room host chassis is safe to ground, only used to discharge the system static charge, the engine room anti-inductive lightning is also considered line protection is enough.
The lightning protection concept of the security project 1 The starting point and ultimate goal of the lightning protection design of the security system must be to ensure the safety of the system equipment and operation. This should be clearly defined in the relevant standards of the industry. Anti-direct lightning protection should be protected by an independent lightning rod; anti-induced lightning protection is a good line protection. Pole lightning rods, grounding surge protectors, grounding surge protectors, if used for security system lightning protection is equal to planting a time bomb.
2 Establish the concept of “wide-area information system electromagnetic compatibility designâ€: “System single-point grounding†is the first element of the lightning protection, anti-interference and system safety design of security systems and the basic principles of security design.
3 Doing security and lightning protection It is necessary to understand some lightning strike probability knowledge, so as to reduce the blindness of lightning protection design and investment, so as not to be misled to design a truly safe and effective lightning protection project. For example, a 3 or 5 meter high independent house or outdoor camera pole, the probability of lightning strike in the north is far less than 0.01 times per year, that is to say, "a hundred years no chance" a lightning strike, it is necessary to do direct lightning protection? Someone is calling you to do, Every outdoor pole needs to be done. Call you to buy a professional stainless steel pole lightning rod and make a professional grounding net (cage); a few hundred yuan outdoor 3, 5 meters high pole, according to the pole lightning rod design, to invest up to Thousands of thousands to 1,200,000 yuan, apparently this is a commercial purpose, let people when the "fat" slaughtered, the result is a "self-destruction" system. Since the Three Gorges Project took into consideration the safety of life and property in several provinces, it was not designed for a hundred years. Is it necessary for a security pole to do so?
A cutting machine is a specialised, often hand-held, power Tool used for cutting hard materials, ceramic tile, metal, concrete, and stone for example. This tool is very similar to an angle grinder, chop saw, or even a die grinder, with the main difference being the Cutting Disc itself (a circular diamond blade, or resin-bonded abrasive cutting wheel for a disc cutter vs. an abrasive grinding wheel for an angle grinder). This tool is highly efficient at cutting very hard materials, especially when compared to Hand Tools.
Cutting Machine,scanncut canvas
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