General knowledge and essentials of lightning protection grounding check   1. Check the steps of surge protection grounding   Test the grounding resistance of lightning rods, high-rise buildings and other facilities to ensure that lightning can be smoothly introduced into the earth.   Lightning protection grounding test method:   1. First find the grounding lead or equipotential connection box of the lightning protection grounding network.   2, with the grounding resistance tester to measure the grounding resistance (there are two test pile 0.4M to insert soil, a distance from the test point 20 meters, a 40 meters, so the test point around 42 meters to have soil)   3. The smaller the grounding resistance value, the better. The specific qualified value must be specified according to the design requirements when the design has requirements.   2. Check and maintain items and precautions during the operation of the surge protection grounding device   When the lightning protection device is in operation, it is necessary to strengthen inspection to detect and handle anomalies and defects in time to prevent the lightning protection device from being useless or the performance of the lightning protection device is degraded.   Specific inspection items are as follows:   (1) The lightning lead part of the lightning protection device, grounding lead line and grounding body are well connected.   (2) The grounding resistance should be regularly tested during operation, and the grounding resistance should meet the specified requirements.   (3) Lightning arresters should be regularly done preventive tests.   (4) Lightning rod, lightning conductor and its grounding wire should be free of mechanical damage and corrosion phenomenon.   (5) the lightning arrester insulation sleeve should be complete, the surface should be without cracks, no serious pollution and insulation peeling phenomenon.   (6) Regularly transcribe the movement times of the arrester as indicated by the discharge recorder.   (7) The grounding part should be well grounded. In addition, before the annual thunderstorm season, a comprehensive inspection, maintenance, and necessary electrical preventive tests should be carried out.

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Post time: Oct-21-2022