Emergency lighting system

Patent metadata

Field	Value
Publication number	US-10904983-B2
Application number	US-201916423462-A
Country	US
Kind code	B2
Filing date	May 28, 2019
Priority date	Apr 19, 2016
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

An emergency lighting system including a plurality of lights including a first group of lights and a second group of lights, a switching circuit, and a controller. The switching circuit includes a relay. The relay has a first position, in which power from the driver is provided to the first group of lights and the second group of lights; and a second position, in which power from the auxiliary power supply is provided to the second group of lights. The controller is configured to output a signal to the emergency control input when an input voltage is below a threshold. Wherein, the switching circuit places the relay in the second position upon receiving the signal at the emergency control input.

First claim

What is claimed is:

1. An emergency lighting system comprising:
a mains power supply;
an auxiliary power supply;
a brown-out circuit configured to extract input voltage information related to a voltage level of the mains power supply, wherein the brown-out circuit scales down an input voltage of the mains power supply to a DC voltage proportional to the voltage level;
a plurality of lights including a first group of lights and a second group of lights;
a driver configured to provide power;
a switching circuit including
a driver input configured to receive power from the driver,
an auxiliary power input configured to receive power from the auxiliary power supply,
an emergency control input, and
a relay having a first position, in which power from the driver is provided to the first group of lights and the second group of lights, and a second position, in which power from the auxiliary power supply is provided to the second group of lights;

a controller configured to
receive the DC voltage from the brown-out circuit, the DC voltage indicative of the voltage level of the mains power supply; and
output a signal to the emergency control input when the input voltage is below a threshold;
wherein the switching circuit places the relay in the second position upon receiving the signal at the emergency control input.

2. The emergency lighting system of claim 1 , wherein the first group of lights are directed in a first direction and the second group of lights are directed in a second direction.

3. The emergency lighting system of claim 2 , wherein the first direction and the second direction are the same.

4. The emergency lighting system of claim 1 , wherein power is not provided to the first group of lights when the input voltage is below the threshold.

5. The emergency lighting system of claim 1 , wherein the first group of lights and the second group of lights are within a housing.

6. The emergency lighting system of claim 5 wherein the charging circuit, the auxiliary power supply, the driver, the switching circuit, and the controller are within the housing.

7. The emergency lighting system of claim 1 , wherein the controller is further configured to perform at least one selected from a group consisting of controlling the charging state of a charging circuit module, identifying a brown-out or brown-in condition, monitoring the voltage of the auxiliary power supply, and controlling a drive level of the driver.

Assignees

• Hubbell Inc

Inventors

• Lane John
• Cyr Allen George

Classifications

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• H05B47/172

  Emergency operational modes · CPC title

• H05B47/19

  via wireless transmission · CPC title

• H05B47/105 Primary

  in response to determined parameters · CPC title

• H02J9/065 Primary

  for lighting purposes · CPC title