Why there is ringing in the TRV waveform?

Ringing in the TRV (Transient Recovery Voltage) waveform occurs due to the interaction of reactive components, such as inductance and capacitance, in the electrical system. When a circuit experiences a sudden change, like the interruption of current, these components can cause oscillations that manifest as overshoot and ringing. This phenomenon is influenced by the damping characteristics of the system, and excessive ringing can lead to insulation stress and potential equipment failure. Proper design and damping techniques are crucial to mitigate these oscillations.