Description
3.4 Device versions
SIRIUS 3RM1 motor starter
30 Manual, 06/2016, A5E0345285095020A/RS-AE/005
The 3RM1 motor starters are designed for the following rated operational currents of the
loads:
Table 3- 2 Current ranges
Adjustable response value current
[A]
Maximum permissible motor power
at 400 V AC [kW]
3RM1.02-..... 0.4 ... 2 0.75
* The versions of the 3RM1.07
-..... motor starter are also suitable for operating resistive loads (e.g.
heaters) up to a rated operational current of I
AC51
= 10 A.
The 3RM1 motor starters are designed for the following control supply voltages:
Table 3- 3 Control supply voltages
110 … 230 V AC 50/60 Hz; 110 V DC
Note the following information for the different device versions:
Note
Motor starters with 24 V DC control supply voltage
As is usual on solid
-state motor starters, a buffering capacitance of 250 µF is installed in the
V DC control circuit of the 3RM1 Standard and Failsafe motor starters. Its purpose is to
the motor with the semiconductors in the event of failure or
disconnection of the control supply voltage. As a result, charging currents can arise briefly
upon activation of the control supply voltage. The buffering capacitance is decoupled by a
diode. Thi
s means that there is no influence on the dark test of safety-related outputs.
You can find more information on the Internet
(
https://support.industry.siemens.com/cs/ww/en/view/91372998).
Standard motor starters
with 24 V DC control supply voltage
The same voltage source (potential) must be used for the control supply voltage and the
control inputs.
The reference point for the control
inputs is terminal A2.
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