Star-delta contactor assembly, size S00
The Siemens 3RA2415-8XE31-2BB4 is a factory-assembled star-delta (wye-delta) contactor assembly from the SIRIUS product brand, designed for reduced-voltage starting of three-phase induction motors. It integrates three contactors — one 3RT2015-2BB41-0CC0 and two 3RT2015-2BB41 units — plus the interconnecting wiring and a RS assembly kit 3RA2913-2BB2, all pre-mounted on a common base plate. The magnet coil is rated at 24 VDC with a closing and holding power of 10 W each — a constant-energisation design that simplifies the control transformer sizing. The size S00 frame keeps the footprint compact: 84 mm height, 135 mm width, 145 mm depth. The mechanical life is rated at 10,000,000 operations typical, which is standard for this contactor frame size in cyclic duty.
Termination and mounting
Both the main current circuit and the auxiliary/control circuit use spring-loaded terminals (cage-clamp type). No screwdriver torque calibration is needed — the spring clamp ensures consistent contact force across the full wire range. Clearance requirements: 6 mm upwards, forwards, downwards, and at the sides; 0 mm backwards (the back of the assembly sits flush against the mounting surface).
Environmental and protection data
The assembly withstands vibration and shock per the specified values: 10.5 g / 5 ms and 6.6 g / 10 ms for both AC and DC excitation — this covers the typical mechanical shock profile in industrial panel installations. No auxiliary switch is fitted as standard (product extension auxiliary switch: No), and the assembly has no bus communication function (product function bus communication: No) — it is a pure power switching assembly. For short-circuit protection, the assigned fuse types are gG NH 3NA, DIAZED 5SB, or NEOZED 5SE, all rated at 20 A. This is the recommended upstream fuse rating for the star-delta configuration at the given motor powers.
Sourced through independent distribution channels. The assembly is supplied as a complete unit with the three contactors and the RS kit pre-assembled.