Can the housing of the lightning rod and the electrical equipment share a ground electrode?
In power plants and substations, the housings of lightning rods and electrical equipment can not share one ground electrode;If lightning to lightning, lightning current through the grounding wire frame to frame in the diaspora, due to the existence of grounding resistance and inductance, the frame will produce a high potential to ground wire, high potential in the vicinity of the electrical equipment or charged will have a large potential difference. If the distance between the two is small, the lightning rod frame will lead to discharge to other equipment or wires, resulting in flashover and accident;For the limitation of the grounding conductor potential increases, the lightning rod must be well grounded, and keep a certain distance with the equipment; the lightning rod is connected with the substation equipment not only, and on the ground the space distance of not less than 5 meters underground, the net distance between lightning and grounding electrical equipment grounding shall not be less than 3 meters.
If it is a lightning protection design of a lightning protection building, it is necessary to design the grounding pole separately, and can not share; the rest can be shared
According to the electrical lightning protection and grounding setting requirements, buildings can be used combined grounding, grounding joint setting total grounding, each of not less than 2-3, common time is needed to each layer and potential in the electrical equipment of the equalizing ring is arranged at the front end of each equipotential connection box is connected on the roof, lightning protection lightning protection zone and after the lightning deflectors and the equalizing ring to achieve.
Lightning and electrical equipment grounding can share a grounding, not a common ground.
