AC solid state power controller with minimized internal power supply requirements

摘要: A power controller having a switch whose drive circuit is supplied by supply producing DC and control protection circuits, such as an overcurrent circuit, zero crossover detection logic are operative without energization from separate supply. Rather these circuits powered merely the AC line same for circuit. This minimizes requirements of controller''s internal which may be met single transformer secondary winding or, preferably, transformerless configuration capacitor voltage divider