Hager ECM140D Information The Hager ECM140D is a single-phase, 40A, 1M, M-Bus, MID-compliant electricity meter. It is a direct-connected meter, which means that it measures the current and voltage directly, without the need for an external current transformer. The ECM140D has a wide measurement range of 0.25-40.0A for current and 92-276V for voltage. It also has a frequency range of 45-65Hz. The ECM140D is equipped with an M-Bus interface, which allows it to be connected to a home energy management system (HEMS) or other smart grid applications. The M-Bus interface also allows the meter to be read remotely, which can be useful for billing purposes. The ECM140D is a high-quality meter that meets the latest MID requirements. It is a reliable and accurate way to measure electricity consumption.