Load Feeders for any application
In our SIRIUS range, you will find the right load feeders (for direct, reversing or star-delta (wye-delta) starters) - fused or fuseless - comprising easily combined single units (e.g. by fitting the appropriate function modules to contactors) or as pre-wired and tested complete units with spring-loaded or screw-type connections. More than 40,000 tested combinations cover almost every application case.
The 3RA2 fuseless load feeders consist of the 3RV2 motor starter protector and the 3RT2 electromechanical contactor.
The devices are electrical and mechanically connected using preassembled assembly kits (link modules, wiring kits and standard mounting rail or busbar adapters).
Advantages at a glance
2 sizes up to 18.5 kW
Width: 45 mm
Modular system for load feeders with motor circuit breakers, contactors, overload relays and current monitoring relays
Also available as pre-wired and tested complete units
More than 40,000 tested combinations
Quick and simple installation of feeders thanks to link modules
Screw and spring-type connection technology available
SIRIUS function modules 3RA28 Motor Starter Protectors
The new 3RV2 motor starter protectors are compact, current limiting motor starter protectors which are optimized for load feeders. The motor starter protectors/circuit breakers are used for switching and protecting three-phase motors of up to 37 kW at 400 V AC and for other loads with rated currents of up to 80 A.
Switching with SIRIUS means high contact reliability, prolonged endurance and usability in extreme conditions.
For easy assembly of load feeders, comprising circuit breakers (motor or starter protection) and other SIRIUS switching devices from the modular system, such as contactors, soft starters or semiconductor switching devices, link modules are available which can be used to combine the devices with spring-loaded or screw-type connections at lightning speed.
Overload and monitoring relays
SIRIUS 3RU, 3RB overload relays or 3RR2 monitoring relays can also be directly integrated in the load feeder by fitting them to the contactor - for even better system monitoring.
The function modules for mounting onto contactors enable the assembly of starters and contactor assemblies for direct-on-line, reversing and wye-delta starting without any additional, complicated wiring of the individual components. They include the key control functions required for the particular feeder, e. g. timing and interlocking, and can be connected to the control system by either parallel wiring or through IO-Link or AS-Interface.
SIRIUS function modules 3RA27
SIRIUS 3RA27 function modules for IO-Link connect starters to the higher-level controller quickly and simply. Direct starters, reversing starters, or star delta starters are assembled by simply plugging onto SIRIUS 3RT2 contactors with a communication interface.
SIRIUS function modules 3RA28
Simply by being plugged in place, the SIRIUS function modules enable different functionalities required for the assembly of starters to be realized in the feeder. The function modules and wiring kits thus help to reduce the wiring work within the feeder practically to zero.
The 3RV29 infeed system enables user-friendly energy supply and distribution of several circuit breakers or complete load feeders with screw-type connections and spring-loaded terminals in the sizes S00 and S0.
Load Feeder Direct-On-Line starter with Timing relay
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System Information - System Guide