Due to heavy workloads and frequent use of overhead cranes, it is easy to cause serious wear and tear on the mechanical transmission systems of the overhead crane. This requires regular maintenance of all parts of the overhead crane to maximize its working efficiency. The electrical control system of the bridge crane can simultaneously control the lifting and lowering of the main and auxiliary hooks and the operating mechanism of the large and small trucks in the cab.

The main control circuit power incoming switch adopts automatic air opening. The main air switch plays a certain protective role as a power supply. Only in emergencies, the emergency button is used to turn on the gate coil and the air switch trips. Under normal circumstances, a power contactor is used to switch the power supply. Power supply and power supply form All power loops and control loops on the mechanism are powered by 380V AC power supply by angle steel slide wires, which are installed on the side opposite the bridge crane cab. The maximum voltage drop from the power supply point to the motor shall not exceed 3% of the rated voltage, otherwise it will affect the normal operation of the bridge machine.

The tracks of large and small trucks of bridge cranes must be reliably grounded according to regulations. The working lighting of the bridge crane uses 500W shock-proof driving lights, which are installed under the main beam and powered by a lighting transformer. The lighting in the bridge frame and the driver's cab uses 220V fluorescent lamps. All lighting is controlled by the lighting control box.

At present, our country has carried out research on energy-saving technology for bridge cranes from all aspects. Moreover, "saving energy, reducing consumption, and building a conservation-oriented society" is also an urgent task in my country's macroeconomic operation, and it is also a long-term strategic task.