How Does A Double-break Vertical Structure Improve The Insulation Performance Of A High-voltage Disconnector?

In the operation of power systems, the insulation strength of high voltage isolator is directly related to equipment safety. The double-break vertical pull-out type high voltage isolator switch exhibits significant advantages in pressure resistance through its special structural design.

This hv isolator uses a double-break configuration, which creates two series-connected insulation gaps when the device is tripped. Compared to traditional single-break devices, voltage stress is distributed across two breaks, reducing the voltage borne by each break by approximately 50%. This voltage distribution mechanism fundamentally reduces the burden on a single insulation point.

The vertical pull-out action causes the conductor rod to move upwards after opening, fully utilizing the spatial insulation distance. When hv isolator switch is in the open state, a sufficiently long air gap is established between the moving contact and the stationary contact. This vertical insulation path is less susceptible to lateral wind deflection or dirt accumulation, maintaining stable insulation performance even under harsh weather conditions.