The time-delay relay NR 3 is an electronic time-delay switch with a potential free relay output for delayed on/off switching of secondary loads. If required, the relay can be used as a pure on-delay with no off-delay. With these selectable modes and the wide range of selectable operating times, the NR 3 is extremely versatile in practical applications.

Also available as flush-mount device NR U3.

Application:

Automatic ventilation of windowless rooms, delayed on/off switching of a wide variety of loads, hotel room card contact etc.