One no longer has to consider traditional ways of compensating for voltage drop where the voltage compensation is calculated as a function of the average output current or based on a feed-back voltage from the aircraft plug. One simply connects the aircraft plug to an auto-calibration plug - that’s all !!! The auto-calibration plug analyses all relevant cable parameters within one second, calculates the voltage drop (even of each single phase and as a function of the load) and automatically sets the voltage compensation. The result is the best achievable voltage quality at the aircraft plug.