Emergency lighting circuit for shunt-regulated battery charging and lamp operation

摘要: Battery charging circuits configured as a combination of current limited sources and shunt regulating path to bypass from battery through low impedance so that charge can be regulated terminated or controlled, the invention further includes in emergency lighting systems utilizing conventional AC mains power non-emergency mode DC an mode, being charged with regulation effected by said when mode. In present circuits, is by-passed portion circuit used for provision alternate which may also supplied lamps, supplanting prior art function continuously turning single on off regulation. primary embodiments, use drive lamps. Current drives lamps normal without passing battery.