The Role Of The Double-break Vertical Pull-out Design In High-voltage Disconnect Switches

In high-voltage systems, high voltage isolator is a mechanical device used to create a visible electrical break. Its main purpose is to achieve physical isolation of the circuit and provide a visible break point for the maintenance of high-voltage electrical equipment. In the mechanical structure design of the vertically pull-out type high voltage isolator switch, the double break is an important feature. This structure is not only a configuration of mechanical geometry, but also an engineering consideration for electrical isolation reliability.

The vertical double-break hv isolator uses a combination of two moving and stationary contacts. The contacts are separated in the vertical direction through a linkage mechanism, forming two clear air gaps in the open state, and the opening position is visible to the naked eye. The two break points are pulled apart vertically at the same time, which is beneficial to the spatial distribution of the break positions and makes the isolation distance between each break greater, thereby improving the withstand voltage spacing of the vertical double break hv isolator switch under high voltage conditions.