Structural Design Of Moving Contact Arrangement For Double-break Vertical Pull-out High-voltage Disconnector

As an important no-load isolation device in the power system, the structural design of the high voltage electrical isolator is directly related to the overall mechanical stability and the form of visible break points for on-site maintenance. For the double-break vertical pull-out type, the position and layout of the moving contact not only affects the action path, but also affects the overall stress state of the device and its response during each operation.

In this isolator high voltage type, the two break points are arranged vertically, which can create a larger air gap in a limited space compared to the horizontal break form, while improving the visibility of the break. When the breaking action is completed, the moving contact moves up or down along a predetermined mechanical trajectory around the insulating support it is located on, forming a double break point with the stationary contacts located on both sides. To ensure that the mechanical linkage mechanism is subjected to balanced forces during opening and closing, maintaining the central position of the moving contact is one of the design considerations.