The combined error of the mechanical overload limiter should not be greater than 8%, and the combined error of the electronic overload limiter should not be greater than 5%.
When the load reaches 90% of the rated lifting capacity, a reminder alarm signal should be sent out.
After the overload limiter is installed on the lifting machinery, it should be adjusted or calibrated according to its performance and accuracy. When the lifting capacity exceeds the rated lifting capacity, the lifting power source can be automatically cut off and a prohibitive alarm signal will be issued.
Overload limiters should be installed for bridge type cranes, railway cranes and portal cranes; tower cranes, elevators and electric hoists can also be installed according to actual needs.
