这是提高线路耐雷水平和减少反击概率的主要措施。杆塔的工频接地电阻一般为

This is the main measure to improve the lightning resistance level of the line and reduce the probability of counterattack. The power frequency grounding resistance of the tower is generally 10-30. In areas with soil resistivity ρ≤1000Ω·m, the concrete foundation of the tower can also function as a natural grounding body, but it is often difficult to meet the requirements of grounding resistance, so an additional artificial grounding device is required. If necessary, measures such as multiple radial horizontal grounding bodies, continuous extension grounding bodies, and long-acting soil resistance reducers can be adopted.

This is the main measure to improve line lightning resistance and reduce the probability of counter-attack. The frequency ground resistance of the pole tower is generally 10 to 30. In areas where the soil resistivity ρ≤ 1000 m, the concrete foundation of the pole tower can also play the role of a natural grounding body, but it is often difficult to meet the requirements of the ground resistance value, so an additional artificial grounding device is required. If necessary, several radioactive horizontal ground bodies, continuous elongation ground bodies, long-lasting soil inhibitors and other measures can be used.

This is the main measure to improve the lightning withstand level and reduce the probability of counterattack. The power frequency grounding resistance of tower is generally 10 ~ 30. In soil resistivity ρ ≤1000 Ω· The concrete foundation of the tower can also play the role of natural grounding body, but it is often difficult to meet the requirements of grounding resistance value, so it is necessary to add artificial grounding device. If necessary, several radial horizontal grounding electrodes, continuous extension grounding electrodes and long-term soil resistance reducer can be used.<br>