Lightning protection grounding is divided into two concepts. The first is lightning protection to prevent damage caused by lightning strikes. The second is electrostatic grounding to prevent electrostatic hazards.
First, the factory lightning protection is divided into the overall structure of lightning protection, which is the lightning protection of the main building, the main ground hit the grounding, grounding, forming a grounding network, grounding resistance is less than 10 euro. Then it is connected with the main steel bar or steel body. The concrete-cement roof is connected with lightning strips or lightning rods, grounding test points have to be left on the outer walls of the walls, and galvanized flat irons are used for direct introduction to the roof.
Second, the grounding of the power supply system is divided into the protection grounding and the work point grounding. The protection grounding is the grounding of the live equipment housing. The grounding of the work point refers to the neutral grounding. The grounding wire practice is the same as the lightning protection grounding method, and the grounding resistance is less than 4 ohms. If the requirements are not met, a grounding electrode should be added. If the conditions are not good, the electrolyte should be added and/or the soil replaced. Working ground and protective ground are led out independently in the power distribution room. The system can be one. Working methods, such as separation of ground and neutral wires, can also be combined into a power system (or equipment). The grounding system must be grounded repeatedly. There is also a separate way, TN-C system. Zero land can no longer be combined into one.
Third, instrumentation grounding system. The system ground resistance is less than 1 ohm. Do not connect to lightning protection ground.
Fourth, anti-static grounding, such as tubing, etc., every (elbow) 35 meters will have a reliable ground (the system can also be independent), resistance is less than 30 euro
First, the factory lightning protection is divided into the overall structure of lightning protection, which is the lightning protection of the main building, the main ground hit the grounding, grounding, forming a grounding network, grounding resistance is less than 10 euro. Then it is connected with the main steel bar or steel body. The concrete-cement roof is connected with lightning strips or lightning rods, grounding test points have to be left on the outer walls of the walls, and galvanized flat irons are used for direct introduction to the roof.
Second, the grounding of the power supply system is divided into the protection grounding and the work point grounding. The protection grounding is the grounding of the live equipment housing. The grounding of the work point refers to the neutral grounding. The grounding wire practice is the same as the lightning protection grounding method, and the grounding resistance is less than 4 ohms. If the requirements are not met, a grounding electrode should be added. If the conditions are not good, the electrolyte should be added and/or the soil replaced. Working ground and protective ground are led out independently in the power distribution room. The system can be one. Working methods, such as separation of ground and neutral wires, can also be combined into a power system (or equipment). The grounding system must be grounded repeatedly. There is also a separate way, TN-C system. Zero land can no longer be combined into one.
Third, instrumentation grounding system. The system ground resistance is less than 1 ohm. Do not connect to lightning protection ground.
Fourth, anti-static grounding, such as tubing, etc., every (elbow) 35 meters will have a reliable ground (the system can also be independent), resistance is less than 30 euro
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