The professional skills of distribution cabinet after-sales personnel include fault diagnosis ability. The professional skills of good distribution cabinet after-sales service personnel can be considered from the following perspectives: 2. Fault diagnosis ability Fault analysis ideas give some common fault scenarios of distribution cabinets (such as distribution cabinets) A short circuit occurs in the electrical cabinet, a certain phase voltage is abnormal, some electrical components are severely heated, etc.), observe the fault analysis ideas of the after-sales service personnel. Professionals will first consider the possible causes of failure from a macro perspective, such as power input problems, busbar failures, damage to specific electrical components, etc., and then gradually narrow down the scope. They will use a systematic approach, such as checking meter readings, measuring voltage and current, observing the appearance and connections of electrical components, to determine the point of failure. Diagnostic Tool Usage assesses their ability to use troubleshooting tools. For example, be proficient in using a multimeter to measure voltage, current, and resistance, and using a megohmmeter to measure insulation resistance, etc. For smart power distribution cabinets, they should be able to use professional monitoring software to read and analyze system operating data, such as by viewing historical records and real-time data of electrical parameters to discover potential faults. And, they need to know how to properly connect and operate these tools to ensure accurate measurement results.