Description
3.4 Device versions
SIRIUS 3RM1 motor starter
24 Manual, 11/2013, A5E0345285095020A/RS-AB/002
The 3RM1 motor starters are characterized by their compact design and narrow width.
They can be used for easy assembly of fuseless load feeders with SIRIUS motor starter
protectors. Alternatively, combinations with fuses or other short-circuit protection devices are
possible.
This allows implementation of load feeders with coordination type 1 for short-circuit currents
of up to 55 kA at 400 V.
The 3RM1 motor starters are available in four different versions:
Product symbol
Direct-on-line starter ✓ ✓ - -
Reversing starter - - ✓ ✓
Overload protection with wide setting range ✓ ✓ ✓ ✓
ATEX certification overload protection - ✓ - ✓
Safety-related shutdown up to SILCL 3 to EN 62061, PL e/Cat. 4 to
EN ISO 13849-1
- ✓ - ✓
The 3RM1 motor starters are optionally available with screw connections or push-in
connections.
Push-in connections are a form of spring-loaded terminals allowing fast wiring without tools
for rigid conductors or conductors equipped with end sleeves. For wiring finely-stranded or
stranded conductors without end sleeves on push-in connections, a screwdriver (with
3.0 x 0.5 mm blade) is required. A screwdriver (with 3.0 x 0.5 mm blade) is also required to
disconnect a conductor.
The advantages of the push-in terminals are found, as with all spring-loaded terminals, in
speed of assembly and disassembly and vibration-proof connection. There is no need for the
checking and tightening required with screw connections.
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