Hubbell Incorporated
EMERGENCY LIGHTING SYSTEM

Abstract:

An emergency lighting system including a mains power supply, an auxiliary power supply, a brown-out circuit, a plurality of lights including a first group of lights and a second group of lights, and a controller. The brown-out circuit is configured to extract input voltage information related to a voltage level of the mains power supply, and scale down an input voltage of the mains power supply to a DC voltage proportional to the voltage level. The controller is configured to control the plurality of lights. Wherein, power is provided from the mains power supply to the first group of lights and the second group of lights when the DC voltage is above a threshold, and power is provided from the auxiliary power supply to the first group of lights and not the second group of lights when the DC voltage is below the threshold.