set. Therefore, the crane can exhibit as high hoisting abilities as possible in the states during the hoisting work.
Incidentally, some crane is mounted with, as a winch for hoisting work, a winch configured to rotate a winch drum with a plurality of electric motors and perform winding-up and winding-down of a hoisted load. In the winch for the hoisting work, it is assumed that a failure occurs in any one of the plurality of electric motors. In this case, a hoisting ability of the crane is deteriorated compared with a hoisting ability at the time when all the electric motors are normally operating without failing.
However, in the conventional overload safety device, the deterioration in the hoisting ability due to the failure of the electric motor of the winchUltimate Stuntman - Walkthrough

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