Three Phase Energy Meter is a device used to measure the energy consumption in a three-phase electrical system. It is commonly used in industrial, commercial, and residential settings where three-phase power is utilized. The meter measures the electrical energy consumption in kilowatt-hours (kWh) and provides accurate readings of the power consumed by the connected load. The Three Phase Energy Meter 333mv is likely a specific model or variant that may have unique features or specifications. It is designed to accurately measure energy consumption in three-phase systems and provide precise readings for billing or monitoring purposes.