Deploy Spd Grounding System Resistance

Deploying a reasonable surge protective device grounding network requires not only extensive and precise theoretical calculations, but also continuous practice and summarization. The card cache grounding body is a key indicator of good surge protector grounding, or not better than the usual overhead line Eiffel Tower card cache 30 omega. The resistance of the surge protection device grounding system (generally referring to the frequency grounding resistance) is generally the sum of several resistances:

(1) Soil resistance, that is, the resistance of the current propagation path away from the ground layer;

(2) Contact resistance between the soil and the earth.

(3) Resistance of the grounding body itself;

(4) Resistance of the grounding wire, grounding plate or grounding busbar and the wires used in the grounding wiring system. The resistance of the soil near the ground determines this.