Star-delta combination with AS-i, AC-3, 55 kW/400 V AC/DC 20-33 V size S3, screw connection, electrical and mechanical interlock 3NO+3NC, varistor integrated SIRIUS 3RA24 star-delta combination for gentle starting of three-phase asynchronous motors. , The 3RA24 star-delta combination is a tested and factory-preassembled combination of three 3RT2 contactors that are already wired and mechanically and electrically interlocked. The included function module with integrated control logic and time setting replaces the entire wiring in the control circuit. They are climate-resistant, approved worldwide (e.g. IEC and UL/CSA) and IE3/IE4 ready. , The 3RA24 star-delta combinations are available with AC and DC operation in sizes S00 to S3. They are available with screw and spring-loaded connection technology for mounting on a standard rail or screw fastening. Variants for connection to IO-Link or AS-Interface are also available. , The accessories for the 3RT2 contactors are the same for all sizes and can also be used for the contactor combinations. , The 3RA24 star-delta combinations replace the tried and tested 3RA14 series. , Simple, efficient, always up-to-date - the SIRIUS modular system.
| Property | Value |
| Voltage type for actuation: | AC/DC |
| Rated operating power at AC-3, 400 V: | 55 kW |
| Rated control supply voltage Us at AC 50 Hz: | 20 to 33 V |
| Rated control supply voltage Us at AC 60 Hz: | 20 to 33 V |
| Rated control supply voltage Us at DC: | 20 to 33 V |
| Degree of protection (IP): | IP20 |
| Rated operating current Ie at AC-3, 400 V: | 115 A |
