EN

1. Low-resistance ground module: Non-metallic graphite lightning protection ground module can be buried vertically or horizontally. The buried depth should not be less than 0.6 meters, generally 0.8-1.0 meters.


2. When several ground modules are embedded in parallel, the distance between the modules should not be less than 4.0 meters. If conditions do not permit, it can be reduced appropriately, and at the same time, the value of the module utilization coefficient should be reduced when calculating the module usage.


3. When the pole cores of the low-resistance non-metal graphite lightning protection ground module are connected in parallel or connected to the ground wire, they must be welded. It is required to use the same metal material for welding to ensure the reliability of the connection. The welding length should not be less than 100mm, and false or missing welding is not allowed.


4. The ground module should be cleaned of welding slag and coated with a layer of asphalt or anti-corrosion paint to prevent corrosion of the pole core.


5. Fine-grained soil should be used for the backfilling of the pits of the grounding module, and construction waste such as broken bricks should not be used as backfilling. When backfilling, it should be operated in layers. After filling 30 cm of material, add appropriate amount of water and compact it. Refill, add water and compact until it is flush with the ground. When ramming, care should be taken to ensure that the module is in close contact with the backfill and the earth is in close contact with the ground without damaging the module itself. After the backfill is completed, water it again to moisten it.


6. After the ground module absorbs moisture for 72 hours, use a ground resistance meter to measure the power frequency grounding resistance. If the expected goal is not achieved, the reasons should be analyzed and remedial measures should be taken.