The method involves operating the loads (21-23) from the mains (11) in normal operation and from an emergency supply (10) if the mains fails. The loads are controlled in accordance with a defined setting when changing from mains to emergency supply and vic...

A description is given of an emergency lighting unit comprising: a connection for a battery (5), an inverter (9) for supplying from said battery (5), in emergency conditions, a lamp (L) connectable to said unit; a control circuit (11) for the current suppl...

The emergency lighting unit comprises a connection for a battery (5), an inverter (9) for supplying, in emergency conditions, a discharge current from said battery (5) to a lamp (L) connectable to said unit, and a battery charger (7). Means are also provid...