SELF-CHECKING EMERGENCY LIGHT UNIT AND METHOD OF OPERATING A SELF-CHECKING EMERGENCY LIGHT UNIT

摘要

A self-checking emergency light unit includes a power input terminal coupleable to an external power supply for receiving power therefrom, an illumination circuit coupled to the power input terminal, a discharge circuit coupled to the emergency power source, and an operational check module coupled to the emergency power source.

主权项

1. Self-checking emergency light unit for a passenger transport comprising:
a power input terminal coupleable to an external power supply for receiving power therefrom, an illumination circuit coupled to the power input terminal, the illumination circuit comprising at least one light source, an emergency power source coupled to the power input terminal and to the illumination circuit, wherein the emergency power source is adapted to store electrical energy received via the power input terminal and to provide electrical energy to the illumination circuit in an emergency operation, a discharge circuit coupled to the emergency power source, wherein the discharge circuit is adapted to effect a discharge of the emergency power source in a power down operation, and an operational check module coupled to the emergency power source, wherein the operational check module is configured to sense at least one electric characteristic of the emergency power source during the power down operation and to determine an operational status of the emergency power source from the at least one electric characteristic during the power down operation.