The ZJW3-515/816/1100 outdoor high-voltage DC grounding switch is used for outdoor DC high-voltage electrical switchgear, featuring a single-arm vertical folding insertion structure. It is primarily used in the DC field of ±800/1100kV converter stations at the midpoint, pole line side, and high-voltage side of the DC filter, providing reliable grounding for electrical equipment under maintenance, such as high-voltage busbars, converter valves, smoothing reactors, and disconnect switches, to ensure the safety of critical equipment and maintenance personnel. The grounding switch can withstand the specified short-circuit current in the closed state and forms a clearly visible grounding break with reliable insulation in the open state.

In current engineering applications, the grounding static contact of ±800/1100kV grounding switches is generally directly connected to the busbar, and the product adopts a freestanding structure.