The opening and closing surges have a close influence on grounding .

Switching surges are transient voltages that occur during the operation of circuit breakers or switches, and can affect the stability of the power system. In particular, if the grounding is not properly done, the voltage fluctuations caused by switching surges can become more severe.

Grounding is an important factor in reducing the effects of surges.

Proper grounding effectively dissipates transient voltages caused by switching surges, preventing damage to electrical equipment .

Poor or high resistance grounding increases the likelihood of insulation breakdown due to switching surges, which can lead to power system failure.

 

There are several types of switching surges, including charging current switching surges, excitation current switching surges, and fault current switching surges , and each surge can be affected differently depending on the grounding condition. For example, charging current switching surges can cause high transient voltages if the grounding is not done properly, and excitation current switching surges can cause repeated re-ignition phenomena if the grounding resistance is high.

Therefore, proper grounding design and installation of surge protection devices (SPDs) are essential to minimize the impact of switching surges . Lowering grounding resistance and utilizing surge protection devices can effectively prevent instability in the power system caused by switching surges.