Only calibrated meters are approved for electricity accounting according to §25 of the German calibration law. Non-compliance is an administrative offense according to §19. M-Bus converter three-phase meter with adjustable converter ratio and MID. Maximum current 3x5A, standby loss of only 0.5 watts per path. Series installation device for mounting on DIN-EN 60715 TH35 mounting rail. 4 division units = 70mm wide, 58mm deep. Accuracy class B (1%). With M-Bus interface. This three-phase meter measures the active energy based on the currents flowing through the converters. The own consumption of only a maximum of 0.5 watt active power per path is not measured and not displayed. 1, 2 or 3 converters with secondary currents up to 5A can be connected. The starting current is 10mA. The N connector must be present. The 7-segment LC-display can be read twice within two weeks even without power supply. The power supply is indicated by a 10-times flashing LED per kWh. To the right of the display