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Safety requirements for overload limiters

Sep 23, 2019
1. The error of the overload limiter should not exceed 8% for mechanical type and should not exceed 5% for electronic type.
 
2. When the load reaches 90% of the bridge crane rated lifting capacity, it should be able to issue a warning signal.
 
3. After the bridge crane is equipped with the overload limiter, it should be adjusted and calibrated according to its performance and accuracy. When the load exceeds the rated lifting capacity, the hoisting power source can be automatically cut off and issue a prohibitive alarm signal.
 
4. Large tonnge bridge cranes must be equipped with overload limiters; the light work level bridge cranes (under 3 tons) can be installed according to actual needs.
 
single girder bridge crane
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