SIRIUS - SIRIUS 3RA load feeders
Manual, 09/2016, A5E03656507520A/RS-AB/003
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Pre-assembled load feeders
In the 3RA2 fuseless load feeder, the 3RV2 motor starter protector takes on the dual function
of overload protection and short-circuit protection. Upstream protective devices such as
melting fuses or limiters are superfluous, as the load feeder is capable of withstanding short
circuits up to 150 kA at 400 V.
The 3RT2 contactor is suitable for extremely complex switching tasks requiring maximum
endurance.
The trip class on all pre-assembled 3RA2 feeders is CLASS 10.
Self-assembled load feeders
Thanks to the flexible SIRIUS modular system, load feeders can be assembled for the most
diverse requirements.
These load feeders can be fuseless or fused. Load feeders for starting motors can be
assembled for the following startup types, for example:
● Direct-on-line start
● Reversing start
● Star-delta (wye-delta) start
● Soft start
● Configuration with solid-state switching devices for high switching frequencies
In the case of a configuration with overload relay, a tripping class up to CLASS 30 can be
set. In the case of a configuration with SIMOCODE, a tripping class up to CLASS 40 can be
set.
About the functions of motor starter protectors In the "References" appendix under "Manuals -
SIRIUS Modular System (Page 140)" in the "SIRIUS
- SIRIUS 3RV motor starter protectors" manual.
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