Direct-On-Line Starter 24 V Dc With Switch Operation And Single-Phase Motor - Siemens SIRIUS 3RM1 Manual

Typical circuits
A.1 Typical circuits for 3RM1
A.1.4

Direct-on-line starter 24 V DC with switch operation and single-phase motor

The current is drawn via only one phase. The motor is connected at T3. The second
connection is directly at the neutral conductor. On the 3RM1 motor starter, T1 is wired direct
with T2, and L2 direct with L3.
The configuration is shown based on the example of a standard motor starter. The
configuration for single-phase loads is also admissible for the Failsafe variants 3RM11 and
3RM13. The notes on safety-related shutdown (Page 174) must be observed.
NOTICE
Damage to property can occur
Connection IN2 on reversing starters must not be used in the case of single-phase motors.
NOTICE
Damage to property due to high making currents
When using capacitive loads, the switching components in the 3RM1 motor starter can be
damaged by excessively high making currents.
Do not operate capacitive loads such as frequency converters on the 3RM1 motor starter.
Operation of single-phase capacitor motors is admissible.
In this operating mode, switching on and off is carried out only with connection IN1.
170
SIRIUS 3RM1 motor starter
Manual, 06/2016, A5E0345285095020A/RS-AE/005