Movement Mechanism Of Moving Contact Of High Voltage Disconnect Switch

Before overhauling substation equipment, a clear disconnection point needs to be established. Operators use mechanical actions to physically isolate the electrical circuit. The moving contact of High Voltage Disconnect Switch performs this function, and its movement trajectory directly determines the on/off state of the circuit.

The moving contact is installed at the end of the insulated operating rod. When the operating mechanism drives the shaft to rotate, the moving contact moves along a predetermined trajectory. During the closing process, the blade inserts into the clamping groove of the stationary contact, and the two form a metal contact surface, establishing a current path. During the opening operation, the moving contact disengages from the stationary contact, creating a visible air insulation gap between phases and to ground, forming a physical break in the circuit. The contact material is a copper-aluminum composite material or silver-plated copper busbar, and the contact resistance is controlled at the micro-ohm level.