3-phase energy meter for transformer ratio 1A or 5A, 4M, MBUS, MID. Energy meter for 4-quadrant measurement with the following accuracy classes: Active energy Class B according to DIN EN 50470-3, active power Class 1 according to IEC 62053-21, active power Class 1 according to IEC 61557-12 and reactive power Class 2 according to IEC 62053-23. The bidirectional meter is MID certified at the factory (a sealing set is included in the scope of delivery) and contains a resettable partial counter. Suitable for measuring energy consumption and energy supply in all network systems. 2 tariff counts can be controlled via 230 V AC or Mbus. Digital display with lighting to show active energy (kWh) and reactive energy (kvarh) consumed and supplied for all tariffs. In addition, the real-time measured values for active power (kW), reactive power (kvar), apparent power (kVA), voltage (V), current (A), power factor, frequency (Hz) and tariff are displayed for each phase conductor with a resolution of up to 9 digits including two decimal places. In addition to the previously mentioned measured values, the current total measured values of active power (kW), reactive power (kvar) and apparent power (kVA) can be accessed via Mbus. All measured values and energy values for tariff 1 and tariff 2 can also be output via an IR interface. Wiring errors and connection errors are displayed and the measured data is saved periodically.