To save energy, it must first be measured. The MDT Energy Meters measure both energy consumption and energy generation, for example by a photovoltaic system. The determined data are the basis for optimising the consumption and increasing the energy efficiency. The energy meters are extensively equipped. In addition to simple current and active power measurement, they count the consumption costs and yields of the generated energy via main and intermediate meters. Numerous application possibilities, such as intermediate measurement and interim billing of rooms and flats, or the efficient use of self-generated energy, are only made possible by this.Measurement by current transformer with practical folding assembly, up to 63 A per channel.