Electric gourd electrical needs what protection
Interlock on electrical circuit, absolutely prevent false operation; The mechanical interlock of the ground operating handle.
Raising limit protection to prevent the crane from exceeding the rising limit when the accident occurs; Short circuit and overload protection;
Limit is broken firearms, which can realize the dual protection, it is a mechanical protection, prevent the wire rope breakage, more serious damage reducer parts, 2 it is can prevent damage of mechanical damage to motor and circuit;
