1. The operating environment temperature is limited to -20℃ ~ +40℃, and the operating system is intermediate JC25%;
2. The motor must use a tapered rotor braking asynchronous motor with a large starting torque, the load persistence rate must be more than 25%, the insulation class is B or F, and the protection class is P44/IP54;
3. The response of the button switch must be sensitive, and there can not be pressed up or pressed down without reaction;
4, the strength and toughness of the wire rope must be guaranteed, using GB1102-74(6*37+1)X type hoisting wire rope;
5. The control box must ensure that it can cut off the relationship with the main circuit, and the up and down stroke is accompanied with the fire breaker;