Why should lightning rod be grounded through resistance?
So, the grounding resistance does not mean access in lightning grounding resistance in the lead, but the lead and steel after welding, vertical depth of 1.5 meters into the ground as the grounding device, the grounding resistance is the resistance of the grounding device and the value of the earth. It is also stipulated that the earthing resistance of lightning rod, lightning conductor and discharge gap shall not be greater than 10 euro in lightning protection earthing.
The ground resistance is the ratio of the ground voltage of the grounding device to the current flowing through the ground. The smaller the resistance in the ground circuit is, the less the resistance is, the easier it is to import the ground current to avoid danger
Lightning is a kind of electric equipment is protected by an effective equipment of direct lightning damage, generally used in various electrical equipment, substation, high-rise buildings and chimney. It is composed of galvanized iron needle, pole, connecting wire and grounding device.
