1. **Understand the basic information of the electric hoist and control box**   - The electric hoist is a special lifting equipment installed on overhead traveling cranes and gantry cranes. It is mainly composed of components such as motors, transmission mechanisms, drums, and wire ropes. It can be used for vertical lifting or horizontal movement of items.   - The electric hoist control box is a device used to control the actions of the electric hoist. Inside it contains electrical components such as contactors, relays, transformers, capacitors, control buttons, and circuit boards. Through the control box, actions such as the upward movement, downward movement, leftward movement, and rightward movement of the electric hoist can be achieved. 2. **Installation and connection**   - **Wiring connection**     - Before connecting the control box and the electric hoist, make sure the power supply is cut off to prevent electric shock accidents. First, select a cable with an appropriate cross - sectional area according to the motor power of the electric hoist and the rated power of the control box. Generally, the cross - sectional area of the cable should be able to withstand the rated current of the motor to avoid cable overheating. For example, if the motor power of the electric hoist is 5kW and the rated current is about 10A, a copper - core cable with a cross - sectional area of 2.5 square millimeters can be selected.     - Connect one end of the cable to the corresponding terminal of the control box. There are usually markings on the control box, such as terminal markings corresponding to “Upward”, “Downward”, “Leftward”, “Rightward”, etc. Connect the wires of the electric hoist motor correctly according to the markings. For a three - phase electric hoist, connect the three - phase power supply (U, V, W phases) correctly and also connect the grounding protection wire (PE) properly.   - **Position installation**     - The control box should be installed in a position that is convenient for operation and should be kept away from harsh environments such as dampness, high temperature, and excessive dust. Generally, the installation height should be suitable for the operator to easily operate the control buttons, usually around 1.2 - 1.5 meters. At the same time, ensure that the control box is firmly installed. Bolts can be used to fix it on a bracket or wall. 3. **Commissioning stage**   - **No - load commissioning**     - After the connection is completed, conduct commissioning under no - load conditions. First, close the power switch and check whether the power indicator light on the control box is on. If the indicator light is not on, check whether the power line is connected correctly.     - Press the “Upward” button and observe whether the lifting motor of the electric hoist is operating normally and whether the hoist can rise smoothly. Similarly, press the “Downward” button to check whether the downward movement is normal. During the no - load upward and downward movement, pay attention to whether the running sound of the motor is normal and whether there are any abnormal vibrations or frictional noises. If there are abnormal sounds, it may be that the motor is improperly installed or there is a mechanical component failure.     - For electric hoists with horizontal movement functions, also test their left - and right - movement functions. Press the “Leftward” and “Rightward” buttons to check the running condition of the electric hoist on the track, ensuring that it runs smoothly and the wheels rotate flexibly.   - **Load commissioning**     - After the no - load commissioning is normal, conduct load commissioning. Gradually increase the load and observe the running condition of the electric hoist under load. Check whether the lifting speed of the electric hoist has a significant change and whether the motor current is within the rated range. For example, if the rated lifting weight of the electric hoist is 10 tons, tests can be carried out by gradually increasing the load, such as loading 2 tons, 4 tons, 6 tons, etc. first.     - Pay attention to observing whether the electrical components in the control box, such as contactors and relays, are working properly under load. If the contactor jumps frequently or overheats, there may be problems with the control circuit or the contactor capacity is insufficient. 4. **Safety settings and usage precautions**   - **Set up an emergency stop button**     - Ensure that there is an emergency stop button on the control box and connect it to the key part of the control circuit. In case of an emergency, such as an abnormality during the operation of the electric hoist or a situation that may lead to danger, pressing the emergency stop button can immediately cut off the power supply of the electric hoist and stop its operation.   - **Daily inspection**     - During the use process, regularly check the connection between the control box and the electric hoist, and check whether the cable is damaged and whether the joints are loose. At the same time, check whether there are signs of overheating or charring of the electrical components in the control box. For example, conduct an external inspection once a month and an inspection of the internal electrical components once a quarter.   - **Operation specifications**     - Operators should receive professional training and be familiar with the functions and operation methods of each button on the control box. During the operation process, strictly follow the operating procedures to avoid misoperation. For example, do not suddenly change the running direction during the lifting or lowering process of the electric hoist to prevent motor overload and damage to mechanical components.