Earthfault Compensation Controller Since Arc Suppression Coils built a 50 Hz resonance circuit with the earth capacitance, the voltage between star point and earth changes according to the adjustment of the coil and has at exact resonance tuning a maximum. This behaviour of the neutral point displacement voltage is used for automatic tuning under load using continuously adjustable ASCs in connection with a controller. • Automatic control of the continuously variable ASC • Works even with small displacement voltages Uo (0,1 - 0,3%) • Monitoring of the network status (recording function) • Faster control by parameter estimation • Display of the digital outputs via LEDs on the front panel • Simple operation with LCD screen and/or scroll wheel as well as different menu languages • Central registration of alarm or fault signals of the ASC and visualization via LEDs on the front panel • Flexible adaptation to net parameters by simple adjustment of various control parameters • Additional functions: - automatic back step control during ground fault - automatic resistance control (increasing residual current) - process control integration - several controllers in the same network - Setting the ASC to a predefined position - controlling an additional fixed ASC • Remote Control Interface possible