The HUAWEI DTSU666-H 3PHASE POWER SENSOR is a three-phase power measurement device designed to work with Huawei solar power systems. This device functions to monitor and collect real-time electricity usage data in commercial and industrial buildings using three-phase electrical systems. It can measure key electrical parameters in each phase, such as voltage, current, power, and energy consumption to help efficiently track and manage energy in medium to large-scale solar power systems.