The professional skills of good distribution cabinet after-sales service personnel can be considered from the following perspectives: Repair and maintenance skills Maintenance operation specifications Observe whether after-sales service personnel follow standardized operating procedures when performing distribution cabinet maintenance. This includes properly cutting off the power supply and taking safety precautions (such as wearing insulating gloves, using insulating tools, etc.) before repairing. They should be able to follow the correct steps when replacing electrical components, such as when replacing a circuit breaker, making sure the model matches, the connections are secure, and the parameters are set correctly. Maintenance Skill Diversity tests their skills in switchboard maintenance. Professional after-sales service personnel should be able to perform a variety of maintenance operations, such as cleaning the dust inside the distribution cabinet (knowing how to prevent dust from entering the inside of the electrical components), tightening the connecting screws of the electrical components, checking whether the temperature of the busbar connection points is normal, and inspecting the electrical components. Components are functionally tested, etc. For smart power distribution cabinets, maintenance operations such as software updates and data backup of the monitoring system should also be included.