Siemens sirius time delay relay timer 3rp1 series siemens 3rp1574 1np30 the siemens 3rp1505 1ap30 is a din rail timing relay from the sirius 3rp1 series it is perfectly suited for all delayed switching processes in control starting protection and regulation circuitsthe solid state timing relay is supplied with time delay relay timer 1 closer undelayed1 closer delayed and a voltage rating of 24v 200 240v acdc siemens 3rp1574 1np30 time delay relay timer 1 closer undelayed1 closer de