What is switching impulse?

A switching impulse is a type of transient voltage surge that occurs in electrical systems when circuit breakers or switches are operated. This phenomenon can generate high-voltage spikes that may exceed the system's normal operating conditions, potentially leading to insulation failure or equipment damage. Switching impulses are characterized by their steep rise time and can be influenced by factors such as system capacitance and inductance. Understanding and mitigating switching impulses is crucial for ensuring the reliability and safety of electrical infrastructure.