On the streets and alleys in cities and the winding paths in rural areas, electric tricycles are common short-distance transportation tools. Whether it’s for transporting goods or carrying people for travel, they have brought great convenience to people. In the core electrical part of electric tricycles, the DC contactor 200A/60V is like a key “commander” that silently commands the flow of power. Although it is often overlooked, its importance should not be underestimated.

Master Li is a veteran waste recycler. His electric tricycle has accompanied him through countless days of recycling waste. One day, Master Li drove his tricycle fully loaded with waste to the recycling station as usual. During the journey, he suddenly felt that the vehicle’s power had dropped significantly. When accelerating, the motor ran weakly and the speed increased very slowly, accompanied by a slight abnormal vibration.

Master Li’s heart sank. He knew very well that there might be a problem with the vehicle’s electrical system. Based on his years of experience, he first suspected that the DC contactor 200A/60V had malfunctioned. So, he parked the tricycle in a safe area by the roadside and opened the electrical control box of the vehicle to find that small DC contactor.

After careful inspection, Master Li found that there were ablation marks on the contacts of the contactor, and the joints of some connecting wires were also loose. This might be caused by the frequent on-off of large currents for a long time and the bumps and vibrations during the vehicle’s driving process, which led to the wear of the contactor’s contacts and the instability of the wire connections. This situation blocked the current transmission, and the motor couldn’t obtain a sufficient and stable current supply, resulting in insufficient vehicle power.

Master Li realized that if this problem couldn’t be fixed in time, it would not only affect the progress of his waste recycling work today but also might cause more serious damage to the vehicle’s electrical system. Just when he was extremely anxious, he remembered that there was a maintenance point nearby that specialized in repairing electric tricycles.

He quickly pushed the vehicle to the maintenance point and described the vehicle’s malfunction in detail to the maintenance master. The maintenance master was very experienced and immediately conducted in-depth inspection and repair on the DC contactor. The maintenance master first carefully disassembled the contactor using professional tools, carefully cleaned the ablated contacts, and replaced the seriously damaged parts. Then, he reconnected and reinforced the loose wire joints to ensure that the wire connections were tight and reliable.

During the maintenance process, the maintenance master explained to Master Li, “This DC contactor 200A/60V is a key component in the electrical system of electric tricycles. It is responsible for controlling the on-off of large currents between the motor and the battery, just like a dispatcher at a transportation hub, precisely commanding the flow of power. Once it malfunctions, the current can’t reach the motor smoothly, and the vehicle’s power will be greatly reduced. When you use the vehicle usually, try to avoid frequent rapid acceleration and sudden braking as much as possible to reduce the impact on the contactor. Also, regularly check the wire connection conditions so as to extend its service life.”

After the maintenance master’s meticulous repair, the DC contactor resumed its normal working state. Master Li restarted the tricycle and felt the familiar and powerful power return. His heart was full of joy and gratitude. He grasped the maintenance master’s hand tightly and said, “Master, thank you so much! Your skills have really helped me a lot. I don’t even know how to thank you.” The maintenance master smiled and said, “It’s all what I should do. Just pay more attention to vehicle maintenance in the future.”

Since then, before setting out each time, Master Li would carefully check the vehicle’s electrical system, especially paying attention to the working state of the DC contactor 200A/60V. He knew very well that this small component was of vital significance for his recycling work and the normal operation of the vehicle. It silently ensured that the electric tricycle could run stably and efficiently on the road.