Strong Impact During Closing Of A High-voltage Disconnecting Switch Can Damage The Porcelain Insulator Supporting The Stationary Contact.

The contact between the moving and stationary contacts is the key point in the High Voltage Disconnect Switch closing process that bears the mechanical load. The high-voltage disconnector itself lacks a complex arc-extinguishing device, making the entire switch assembly highly sensitive to mechanical shocks. The supporting porcelain insulator, as a crucial insulation and support component for the stationary contact, directly affects the response to impact loads due to its material strength and manufacturing quality. Improper control of the operating mechanical movement amplitude and closing speed can lead to excessive contact insertion force, causing the force transmitted to the porcelain insulator to exceed its bearing capacity and resulting in structural damage.