Main technical parameters Reference voltage 220V Voltage reference 0.7 U Un .2 b -1 Current specifications 5-30A Reference frequency 50Hz Grading accuracy 2.0 Starting current 0.4% Ib Voltage Power Lines "0.8W Communication transmission distance 5m Environmental conditions -25°Cï½Â55°C Relative humidity ≤85% Automatic relay depth Data transmission speed Center frequency Dimensions 167 * 123 * 60