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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.
| Item | Specification |
| Model | GJ-3 |
| Rated Voltage | AC 380V / DC 24V |
| Rated Current | 5A |
| Contact Configuration | 1 NO + 1 NC |
| Trigger Method | Chain-hook mechanical trigger |
| Protection Grade | IP54 |
| Mounting Method | Top bolt fixing / bracket mounting |
| Operating Temperature Range | -20℃ ~ +60℃ |
| Housing Material | Galvanized steel plate + aluminum alloy |
| Cable Length | 2 meters (with aviation plug) |
| Applicable Equipment | Electric hoists, bridge/gantry cranes |