Siemens Sirius 3RW44 System Manual page 33

3/N/PE~ 50 Hz 400 V
L1
L2
L3
PE
G1
M1
Motor rotation in phase direction
Fig. 3-5: Block diagram of a 3RW44 soft starter in an inside delta circuit
SIRIUS 3RW44 manual
GWA 4NEB 535 2195-02 DS 01
Notice
The DC braking and combined braking device functions are no longer available
for inside delta circuits.
In order to ensure proper functioning of the soft starter, the electric connection
of the main voltage (line and motor side) must be made according to the given
circuit examples (refer to Section 8.1).
Q1
U1 V1 W1
V2
W2 U2
Notice
If a main or line contactor is used, this contactor must not be connected
between the soft starter and the motor or in the return line between the motor
and the soft starter. Otherwise the soft starter would not recognize the current
circuit version (standard circuit or inside delta circuit) and output an error
message: "load phases 1-3 missing".
Installation, connection and branch layout
3/N/PE 50 Hz 400 V
L1
L2
L3
PE
Q1
G1
M1
Motor rotation against phase direction
3-7