Panel mounted energy meter, also known as embedded meter, is a common electric energy metering and billing device, which is mainly used in power cabinets in the fields of power system, industrial production and commercial building power metering. The multifunctional energy meter's small size, high measurement accuracy, intuitive display, rich functions, simple maintenance and other characteristics and advantages provide users with reliable power metering and management support,which is an indispensable form of power metering and billing.