In today’s increasingly busy logistics and transportation, the tailboard of the electric tricycle has become a powerful assistant for loading and unloading many goods. It can easily lift, lower and move goods, greatly improving work efficiency. In the operating system of the electric tricycle tailboard, the DC contactor 300A/60V plays a vital role and can be regarded as the “power hub” of the tailboard.

Lao Wang is a staff member engaged in express delivery. His electric tricycle is equipped with a convenient and practical tailboard. Every day, he drives the tricycle to shuttle between various residential areas and express delivery outlets, loading and unloading a large number of express parcels. One day, Lao Wang came to an express delivery outlet as usual, ready to load a new batch of express parcels. He skillfully operated the tailboard controller. However, the tailboard just trembled slightly and didn’t rise smoothly as usual.

Lao Wang’s heart tightened. He knew that there might be a malfunction in the electrical system of the tailboard. First, he checked the power connection of the tailboard and found that everything was normal. Then, relying on his experience, he cast his suspicious eyes on the DC contactor 300A/60V. Lao Wang carefully opened the electrical control box of the tailboard and found the seemingly insignificant but highly responsible DC contactor.

After careful observation, he found that there were some black oxides on the contacts of the contactor. This might be caused by the frequent on-off of large currents for a long time, which led to the heating and oxidation of the contacts, thus affecting the current transmission efficiency and making the tailboard unable to obtain enough power to work normally. Lao Wang realized that if this problem couldn’t be solved in time, today’s express delivery task would be seriously affected.

Just when Lao Wang was worried, he remembered that there was a shop nearby that specialized in repairing electric vehicle equipment. He quickly drove the tricycle to the door of the shop and explained the situation to the maintenance master. The maintenance master was very experienced and immediately conducted a more in-depth inspection of the DC contactor.

The maintenance master used professional tools to disassemble the contactor, cleaned the oxides on the contacts, and polished and adjusted the contacts. During the maintenance process, the maintenance master explained to Lao Wang, “This DC contactor 300A/60V is the key among the keys for the tailboard. It has to withstand a current as high as 300A. During the actions such as lifting, lowering and translation of the tailboard, it precisely controls the on-off of the current, just like a traffic commander directing the flow of electricity. If it malfunctions, the tailboard will lose power or have abnormal movements. Moreover, when using the tailboard usually, try to avoid overloading as much as possible, so as to reduce the pressure on the contactor and extend its service life.”

After the maintenance master’s meticulous maintenance and adjustment, the DC contactor resumed its good working state. Lao Wang operated the tailboard controller again, and the tailboard rose and fell smoothly, with free and fluent movements. A gratified smile appeared on Lao Wang’s face, and he was extremely grateful to the maintenance master. “Master, thank you so much! If you hadn’t repaired it in time, I wouldn’t be able to do my job today.” The maintenance master smiled and said, “It’s just a trifle. But you should pay more attention to the maintenance of the tailboard in the future, especially this DC contactor.”

Since then, before using the electric tricycle tailboard each time, Lao Wang would first check the working state of the DC contactor to ensure its normal operation. He knew very well that although this small DC contactor was not known to most people, it silently played an indispensable role in the daily work of the electric tricycle tailboard, ensuring the smooth progress of goods loading and unloading and contributing to the efficient operation of logistics and distribution.