3Rm19 3-Phase Infeed System - Siemens 340 Manual

4.4.2

3RM19 3-phase infeed system

The 3RM19 3-phase infeed system is designed for 3RM1...-1AA.4 motor starters with screw
connections and 3RM1...-3AA.4 motor starters with hybrid connections. Push-in terminals
can therefore not be connected with this infeed system.
Note
Use of several busbars
More than five devices can be connected by clamping the terminal lugs of a second busbar
rotated by 180°.
A motor starter must be plugged into the connection points of the busbars. Observe this in
the case of gaps stipulated for derating purposes, and select appropriate busbars.
The special 3-phase busbar enables fault-free and fast main circuit wiring when using
several 3RM1 motor starters arranged side-by-side. The energy is routed from an upstream
short-circuit protection device to the system via an infeed terminal. The 3-phase busbar is
designed in such a way that the maximum number of 3RM1 motor starters is only limited by
the rated operational current of the infeed system.
Rated operational current
For the components of the 3RM19 infeed system, the maximum permissible rated
operational current is 25 A (UL: 16 A).
If you use several 3RM1 motor starters that together require more than 25 A, form groups
that each have a maximum requirement of 25 A (UL: 16 A).
Note
Multiple infeed
If you plan multiple infeed in the case of a respective requirement of more than 25 A, you
must observe a potential current asymmetry in the infeeds.
SIRIUS 3RM1 motor starter
Manual, 11/2013, A5E0345285095020A/RS-AB/002
Configuration
4.4 Infeed for the main circuit
65