The SIRIUS 3RA6 compact starters offer a number of benefits:

• 1
  Compact design saves space in the control cabinet.
• 2
  Little planning and assembly work and far less wiring thanks to a single complete unit with one article number.
• 3
  Low variance and therefore low stock levels, with two wide voltage ranges and five wide setting ranges for the rated current.
• 4
  High plant availability through integrated functionalities such as prevention of main contact welding and disconnection at end of service life.
• 5
  Enhanced productivity through automatic device RESET in case of overload and differentiated detection of overload and short circuit.
• 6
  Easy checking of the wiring and testing of the motor direction prior to startup thanks to optional control kits.
• 7
  Quick replacement of devices thanks to removable terminals with spring-loaded and screw terminals in the main and control circuit.
• 8
  Efficient power distribution through the related SIRIUS infeed system for 3RA6.
• 9
  Direct connection of the motor feeder cable to the SIRIUS infeed system for 3RA6 thanks to integrated PE bar.
• 10
  Connecting and looping through of incoming feeders up to a cross-section of 70 mm².
• 11
  Possibility of directly connecting the motor cable without intermediate terminals when using the infeed system for 3RA6.
• 12
  Integration in Totally Integrated Automation thanks to the optional connection to AS-Interface or IO-Link.

SIRIUS 3RA6 compact starters are universal motor feeders according to IEC 6094762. As control and protective switching devices (CPS) they can connect, convey and disconnect the thermal, dynamic and electrical loads from short-circuit currents up to Iq = 53 kA, i.e. they are practically weld-free. They combine the functions of a motor starter protector, a contactor and an electronic overload relay in one enclosure. The versions available are the 45-mm-wide direct-on-line starters and the 90-mm-wide reversing starters.

The reversing starter version comes with not only an internal electrical interlock but also with a mechanical interlock to prevent simultaneous actuation of both directions of rotation.

The compact starters have isolating features according to IEC 609472 and can be used as disconnector units (main switch according to EN 60204 or VDE 0113). Isolation is effected by moving the handle into the "OFF" position; disconnection by means of the control contacts is not enough.