120 kW reversing starter — S00 frame, CLASS 10 thermal protection
The 3RA2210-0FE15-2BB4: The integrated overload relay uses a thermal bimetallic element (CLASS 10 trip characteristic), so it tracks motor heating accurately during start-up and protects against sustained overloads without nuisance tripping on normal starts. Short-circuit protection is handled by a magnetic trip mechanism built into the same housing — the unit is a coordinated assembly, not a contactor plus a separate overload bolted on.
Mounting and termination — DIN rail or screw, spring-clamp main circuit
The starter mounts on 35 mm DIN rail via the screw-and-snap-on method, or can be screw-mounted directly to a backplate — the vertical mounting position is specified for proper thermal convection through the bimetallic overload. Main circuit connections use spring-loaded terminals (cage-clamp style), so solid or ferruled stranded conductors are gripped without retorquing — a time-saver in panel build and less prone to loosening under vibration than screw terminals. The supplied contactor is a 3RT2015-2BB42 and the link module is 3RA2911-2AA00 — these are the factory-matched components that make the reversing pair and the mechanical interlock, so the assembly arrives as a single orderable unit, not a kit you piece together.
Clearance and panel fit — S00 footprint with defined air gaps
The S00 frame measures 90 mm wide by 204 mm tall by 97 mm deep — the depth is the dimension from the DIN rail foot to the front of the housing, critical for enclosure depth planning. Required clearances around the unit: 50 mm upwards, 32 mm forwards, 10 mm downwards, and 10 mm at the side — backwards clearance is zero, so the unit can sit flush against a rear panel or busbar. These gaps allow for wiring bends, heat dissipation from the bimetallic overload, and access to the spring-loaded terminals with a screwdriver — skimping on the upward clearance risks overheating the thermal element.
Environmental range and compliance documentation
Operating temperature spans -20 to +60 °C, with storage and transport range from -50 to +80 °C — the wider storage envelope means the unit can sit in an unheated warehouse or container without damage. The substance prohibitance date of 10/01/2009 indicates RoHS compliance per the EU directive — the starter was designed to meet the RoHS threshold before that date, so it is compliant for current European and UKCA markets. Rated for 50/60 Hz supply — the thermal overload characteristic is frequency-independent within that band, so the same unit works on 50 Hz or 60 Hz networks without recalibration.