CT operated three-phase energy meter with settable CT ratio and MID. Maximum current 3x5A. Standby loss 0.5 watt per path only. Modular device for DIN-EN 60715 TH35 rail mounting. 4 modules = 70mm wide and 58mm deep. Accuracy class B (1%). With S0 interface. This three-phase energy meter measures active energy by means of the current between input and output. The internal power consumption of 0.5 watt active power per path is neither metered nor indicated. 1, 2 or 3 phase conductors with max. currents up to 5A can be connected. The inrush current is 10mA. The N terminal must always be connected. The 7 segment LC display is also legible twice within a period of 2 weeks without power supply. Power consumption is shown by a bar flashing at a rate of 10 times per kWh. On the right next to the display are the keys MODE and SELECT. Press them to scroll through the menu according to the operation manual. First the background lighting switches on. The display then shows the total active energy, the active energy per resettable memory, and the instantaneous values of consumption, voltage and current per phase. The CT ratio can also be set. It is set to 5:5 at the factory and blocked with a bridge over the terminals which are marked with JUMPER. To adjust the CT ratio to the installed transformer remove the bridge and reset the energy meter according to the operation manual. Then block it again with the bridge. Adjustable current transformer ratios: 5:5, 50:5, 100:5, 150:5, 200:5, 250:5, 300:5, 400:5, 500:5, 600:5, 750:5, 1000:5, 1250:5 and 1500:5. Error message (false): When the phase conductor is missing or the current direction is wrong false and the corresponding phase conductor are indicated on the display. Important! Before working on the current transformers disconnect the voltage paths of the energy meters.