Emergency Lighting UPS (Uninterrptible Power Supplies)
When specifying a UPS (Uninterruptible Power Supply) for Emergency Lighting applications, a Static Inverter will be used to maintain power to lighting for a period of 1 hour or 3 hours (depending on specification - as per EN 50171:2001).
BS EN 50171:2001 specifies the requirements for how long emergency lighting is on, how bright it is and more.
A UPS can be used to support these loads, however, it will typically be a specially designed version to meet the requirements of EN 50171:2001. A standard UPS will not meet this specification, and should not be used for safety applications, so it is imperative a static inverter is used instead.