Generally, the Three Phase Energy Meter uses 4 wires for power - 3 of the 4 wires are the phase wires and the 4th wire is the neutral wire. This metering method is suitable for industrial and high residential environments as it provides accurate three-phase motor current calculations. In India, the Three Phase Energy Meter is only required when the load is above 5KW or 7KW. The Three Phase Energy Meter is mainly used in two configurations - star and delta. The added value of the two single meters gives the 3-phase motor amperage calculation. The Three Phase Energy Meter is used to measure the power of a three-phase power supply and is most commonly used for commercial purposes. Currently, consumers with three-phase electricity cannot install digital smart meters, but some business users have been able to take advantage of AMR technology, such as three-phase advanced meters, to record their electricity usage.

　　Most UK homes have what is called 'single phase electricity meters, connected by two wires at 230 or 240 volts. But thousands of homes and businesses across the country use a three-phase connection, connected at 400 or 415 volts through three active wires or "phases" and a neutral. These sites have different types of connections as they use higher electrical loads, and/or have more complex home energy setups - such as solar panels, battery storage, or EV chargers. Until now, these homes and businesses have not had access to the latest smart metering technology.

　　The Three Phase Energy Meter is suitable for commercial and industrial applications. It provides efficient and accurate three-phase motor current calculations in areas with heavy electrical loads. In factories, automated factories, solar power plants, data centers, and many other industries, metering and determining power efficiency is often the first choice. It is used to protect valuable equipment from high-voltage damage. It also monitors and provides accurate real-time power consumption data. This means that the metering system keeps records of three-phase motor current calculations for several months. This data can be used for analysis later.