Siemens 3RP2574-1NW30 is an electronic timing relay with a star-delta (wye-delta) starting function for motor control sequencing. It provides two normally open contacts (DPST-NO), one instantaneous and one delayed, with a timing range of 1 to 20 seconds. The relay is powered from 12 to 240 V AC or DC at 50/60 Hz via screw terminals, and its outputs are rated up to 250 VAC at 3 A.
