EMERGENCY LIGHTING SUPERVISORY SYSTEM

摘要

An emergency lighting supervisory system (20) monitors utility power so as to automatically connect emergency lights (66) to a battery source (46) when utility power fails. The system (20) continuously monitors selected parameters and, automatically, periodically tests the system under simulated full-load emergency conditions and annunciates the results of these tests. Such periodic test also enhance battery capacity. The system also provides a closed loop three-mode battery charging control circuit (24). It can optionally communicate its status as well as receive commands from an external computer (212) or other source by use of a data communication interface (208).