The EIT300 intelligent power monitoring terminal is a rail-mounted intelligent terminal meter launched by Beijing Eiside Technology Co., Ltd. It supports built-in current transformers, open transformers, Rogowski coils, and is suitable for medium and low voltage systems (6～35kV and 0.4kV) intelligent transformation, with powerful data collection, processing, statistics and control functions. EIT300 adopts LCD display and has the function of electric energy pulse output. It can exchange data with the server through RS485 interface, 4G, LoRa or NB-IoT WIFI communication, which greatly facilitates the automation management of electricity consumption. At the same time, a variety of anti-interference measures are adopted, which can operate stably in the harsh power system environment.