Data collection in the smart grid. The three-phase electricity meter was developed specifically for the requirements in households and small businesses. The three-phase electricity meter can be used as modern measurement. The integrated two tariff terminals let the energy provider offer customers a two tariffs ("peak", "off-peak”), without needing the installation of an intelligent measuring system. In addition, the three-phase electricity meter can be used as a component of the intelligent measuring system. The integrated DIN rail provides space for a smart meter gateway and a control box or the communications technology. Both options for using the devolo electricity meter - as modern measuring equipment or in an intelligent measuring system - reduce the complexity involved with procuring and installing the devices. This offers the measuring point operator the greatest possible flexibility.