20 HZ BANDPASS FOR STATOR EARTH FAULT 100% PROTECTION THE 20HZ BANDPASS FILTERS THE SQUARE-WAVE VOLTAGE AND TRANS- FORMS IT TO SINUS CURVES WITH FREQUENCIES OF APPROX. 20HZ. THE INTERNAL RESISTANCE IS THEN EQUAL TO APPROX. 8 OHM. AT THE SAME TIME IT PROJECTS THE 20HZ FREQUENCY GENERATOR IN CASE OF EARTH FAULT WITH FULL DISPLACE- MENT VOLTAGE. AT RATED FREQ. THE RESISTANCE IS APPROX. 160 OHM (50HZ), 200 OHM (60HZ). MAX. POWER CONSUMPTION IS APPROX. 80VA. IN 7XP20 CASE FOR FLUSH MOUNTING