Patent ID: 8822869
Filing Date: 2014-09-02
Classification: H01H

Abstract:
1. A switching mechanism for a gas insulated switchgear, the switching mechanism comprising: a stationary contactor having a stationary arc contactor portion at a center and a stationary main contactor portion fixedly installed at a radially outward position from the stationary arc contactor portion; a movable arc contactor that is linearly movable to a contacting position for contacting the stationary arc contactor portion or to a separating position for separating from the stationary arc contactor portion; a movable main contactor that is connected to the movable arc contactor at a radially outward position relative to the movable arc contactor and is linearly movable to a contacting position for contacting the stationary main contactor portion and to a separating position for separating from the stationary main contactor portion; a cylinder rod that is connected to the movable main contactor and the movable arc contactor to provide driving power for linear motion to the movable main contactor and the movable arc contactor; a connecting rod that is connected to the cylinder rod in order to transmit the driving power from a power source; a stationary cylinder that receives the movable arc contactor, the movable main contactor, and the cylinder rod such that the movable arc contactor, the movable main contactor, and the cylinder rod are movable therein in a linear motion, the stationary cylinder having a hollow guide tube portion for guiding the linear motion; and a spring surrounding a body of the cylinder rod such that one end of the spring is supported by a stationary spring supporting seat portion and another end of the spring is supported by a movable spring supporting seat portion that is linearly moveable and connected to the cylinder rod or the connecting rod and linearly movable, wherein the spring is compressed by the movable spring supporting seat portion when the moveable spring supporting seat portion moves toward the stationary spring supporting seat portion, wherein elastic energy in the spring is: