Maximum current 3x80A, standby loss only 0.5 watts per path. Rail-mounted device for installation on DIN-EN 60715 TH35 mounting rail. 4 division units = 70 mm wide, 58 mm deep. Accuracy class B (1%). With S0 interface. The directly measuring three-phase energy meter measures active energy based on the currents flowing between the inputs and outputs. The self-consumption of only a maximum of 0.5 watts active power per path is not measured and not displayed. The active energy is added depending on the sign. Positive power on the meter indicates energy consumption, while negative power indicates energy delivery. Energy measurement is cumulative. If energy consumption (P positive) is greater than energy delivery (P negative), the meter reading increases to the right. If energy delivery is greater than energy consumption, the meter reading increases to the left. Energy consumption is indicated with a right arrow and energy delivery with a left arrow above the active bar on the display. 1, 2, or 3 external conductors can be connected with currents up to 80 A. The starting current is 40 mA. The N connection must be present. The 7-segment LC display can also be read twice within two weeks without power supply. Power consumption is displayed with a bar blinking 100 times per kWh on the display. To navigate through the menu according to the user manual, the MODE and SELECT buttons are located to the right of the display. First, the background lighting turns on. Then, the total active energy for consumption and delivery, the active energy of the resettable memory for consumption and delivery, as well as the instantaneous values of power, voltage, and current for each external conductor can be displayed. Error message (false): If an external conductor is missing, "false" and the corresponding external conductor are displayed.