SIEMENS
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Siemens IC 10 · 2017
Load Feeders and Motor Starters for Use in the Control Cabinet
SIRIUS 3RM1 motor starters
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Accessories
Three-phase infeed system
(3RM19 three-phase busbar system)
The system permits an easy, time-saving and safe means of
feeding two or more 3RM1 motor starters. It can be used only
with motor starters with screw terminals and in combination with
8US1716-0RK00 adapters for mounting rails in the main circuit.
The maximum summation current must not exceed 25 A.
The primary infeed is connected via a three-phase infeed
terminal.
The busbars are available in three lengths, for two, three or five
motor starters. More than five devices can be connected by
clamping the connection tags of a second busbar rotated by
180°.
The three-phase busbars are finger-safe but empty connection
tags must be fitted with covers.
3RM19 infeed system with three-phase infeed terminal: In the above
example, two three-phase busbars (5-pole busbars) rotated through
180° allow up to nine 3RM1 motor starters to be connected. Contact with
the unused connection tags in unoccupied positions is prevented safely
by the covers.
Type
3RM1.0.-1AA..
3RM1.0.-3AA..
3RM1.0.-2AA..
Connections/terminals:
Type of electrical connection for the main circuit
Screw terminals
Spring-type
terminals (push-in)
Connectable conductor cross-section for main contacts
• Solid
mm²
1x (0.5 ... 4),
2x (0.5 ... 2.5)
1x (0.5 ... 4)
• Finely stranded
-
With end sleeve
mm²
1x (0.5 ... 2.5),
2x (0.5 ... 1.5)
1x (0.5 ... 2.5)
-
Without end sleeve
mm²
--
1x (0.5 ... 4)
Type of electrical connection for auxiliary and control circuits
Screw terminals
Spring-type terminals (push-in)
Connectable conductor cross-section for auxiliary contacts
• Solid
mm²
1x (0.5 ... 2.5),
2x (1.0 ... 1.5)
1x (0.5 ... 1.5),
2x (0.5 ... 1.5)
• Finely stranded
-
With end sleeve
mm²
1x (0.5 ... 2.5),
2x (0.5 ... 1)
1x (0.5 ... 1.0),
2x (0.5 ... 1.0)
-
Without end sleeve
mm²
--
1x (0.5 ... 1.5),
2x (0.5 ... 1.5)
AWG number as coded connectable conductor cross-section
• For main contacts
1x (20 ... 12),
2x (20 ... 14)
1x (20 ... 12)
• For auxiliary contacts
1x (20 ... 14),
2x (18 ... 16)
1x (20 ... 16),
2x (20 ... 16)
More information
Manual,
see
1
4
2
3
1
2
3
4
Four 3RM1 motor starters on standard mounting rail with one
free slot
3RM1920-1AA three-phase infeed terminal
Two 3RM1910-1DA three-phase busbars rotated through 180°
for the connection of up to nine motor starters
Covers for three 3RM1910-6AA connection tags for unoccupied
positions
IC01_00169c
© Siemens AG 2016