Why Do Grounding Systems Have Extremely High Requirements For Surge Arresters?

132 kv lightning arrester must be connected to a low-impedance, highly conductive grounding network to quickly introduce lightning current and prevent equipment from being subjected to prolonged high potential. The standard emphasizes that the grounding resistance must meet the specifications.

The layout of the grounding system must consider the propagation path of lightning current and equipotential bonding, ensuring that the conductor connected to 132kv lightning arrester forms a unified grounding body with other metal structures, reducing local potential differences. For example, in the lightning protection structure of a computer room, it is artificially required that 132kv surge arrester be connected to the shielding mesh, metal cabinets, building steel reinforcement, etc., at the same potential.