Active power energy meters are designed for the power monitoring needs of power systems, industrial and mining enterprises, public facilities, and intelligent buildings. It can measure all commonly used power parameters, such as three-phase current, voltage, active and reactive power, electrical energy, harmonics, etc. Due to the complete communication and networking functions of this power instrument. The active electricity meter records your active energy and is the basic data for collecting electricity bills. Active electrical energy, which can be converted into various types of energy. For example, converting into thermal energy through an electric furnace, mechanical energy through an electric motor, and light energy through an electric lamp. The electrical energy consumed in these conversions is active electrical energy. The electric meter that records this type of electrical energy is an active meter. Reactive electrical energy, some electrical devices need to establish a conversion environment before energy conversion, such as electric motors, transformers, etc. A magnetic field must be established before energy conversion, while others require an electric field to be established before energy conversion. The electrical energy required to establish magnetic and electric fields is reactive energy. The electricity meter that records this type of electricity is a reactive energy meter