The Zoomlion GJ-1 Overwind Protection Switch is an essential safety component for lifting equipment. When the hook reaches its upper limit position, the switch triggers instantly to cut off the hoist control circuit, preventing serious accidents such as steel wire rope breakage or hook fall caused by overwinding.

The GJ-1 Anti-Overwinding Switch is a safety protection device designed specifically for engineering lifting equipment, primarily used in the hoisting mechanisms of mobile cranes, crawler cranes, and similar machinery. It triggers automatically when the hook reaches the preset upper limit position, cutting off the power supply to prevent equipment damage and safety accidents caused by wire rope overwinding. It is a core component for ensuring safe lifting operations.

The GJ-3 Overwind Limit Switch is a safety protection device specifically designed for lifting equipment. Its core function is to prevent accidents such as wire rope overwinding, breakage, or lifting tool damage caused by the hook exceeding its upper limit position. Featuring a metal housing and mechanical trigger structure, it offers sensitive response, easy reset, and reliable performance, making it an essential safety component for industrial lifting operations.