Accessories for Motor StarterSIRIUS 3RM1 motor starters are compact devices 22.5 mm wide, combining a large number of functions in a single enclosure.They consist of combinations of relay contacts, power semiconductors (hybrid technology), and a solid-state overload relay for switching induction under normal operating conditions.Accessories for SIRIUS 3RM1Busbar in different typeFor Screw-type connectionSiemens SIRIUS 3RM1