| 摘要 |
A power module 10 for an emergency lighting luminaire 16 and ballast 18 comprises a mains supply 12 and a centralised battery supply 24. If the mains power supply fails then the emergency lighting module receives power from the central battery supply via a central power pack 30. The system is particularly useful in a system, such as a self-contained emergency lighting unit, which would normally have a local battery (14, figure 1), and where the centralised battery supply replaces the local battery and the local battery charging current is used to charge the central battery power pack. |
