CBR/M

The CBR is a changeover relay unit configured to allow a luminaire to be operated normally from the switched lighting supply and also when the local 240V un-switched supply fails. The changeover then draws power from the emergency supply. This can be either 50V, 110V or 240V AC/DC systems or 240V AC static inverter systems. 

The associated control gear/lamp must be capable of being powered by both 240V AC and the voltage of the central battery being used. Upon (un-switched) mains failure, the main changeover relay de-energises, and the unit changes over to an intermediate state for approximately 0.5s. After this period the emergency supply hold off relay also de-energises, and connects the emergency supply to the load. Upon restoration of the un-switched supply, the emergency supply hold off relay energises and breaks the emergency supply to the load. Again, after the 0.5s delay the main changeover relay energises, and connects the switched lighting supply to the load.

The unit is fitted with a dimming inhibit relay, which can be used with dimming control gear to reset the dimming level to 100% during an emergency situation. The module is  suitable for use with LED, fluorescent and conventional control gear.