Star-delta contactor assembly for controlled motor starting
The SIRIUS 3RA2415-8XF31-1BB4 is a factory-assembled star-delta (wye-delta) starter kit containing three 3RT2015-1BB41 contactors and the interlocking RS assembly kit 3RA2913-2BB1. It reduces inrush current during motor start by connecting the windings in star, then switching to delta for full-load running. The 24 VDC coil (screw-type terminals) matches standard control voltage rails in industrial panels.
Mechanical endurance and switching constraints
The assembly withstands shock of 10.5g for 5 ms and 6.6g for 10 ms on both AC and DC supplies — relevant for installations on vibrating machinery or conveyors.
Wiring and terminal capacity for the BOM freeze
Main current circuit and auxiliary/control circuit terminals are screw-type. AWG equivalents: 2x (20 to 16) and 2x (18 to 14). No integrated auxiliary switch or bus communication module is fitted — these are external add-ons if needed. The recommended upstream fuse for type 2 coordination is gG NH 3NA, DIAZED 5SB, or NEOZED 5SE rated at 20 A.
Production status and sourcing posture
Substance prohibition date per RoHS/REACH compliance is noted as 10/01/2009, indicating the design meets EU substance restrictions effective from that date.