Installation, Connection and Branch Layout
SIRIUS 3RW44 manual
GWA 4NEB 535 2195-02 DS 06
3-5
3.2.2 Soft Starters in Standard Circuits
The SIRIUS 3RW44 soft starter is connected in the motor branch between the
disconnector or circuit breaker and the motor.
The 3RW44 soft starter automatically detects the type of connection of the soft
starter, meaning that this does not have to be explicitly set on the device. The
detected connection type can be read on the starter under the menu item "Status
display/Type of connection". In this case, the
display reads "Star/delta". If the circuitry is faulty or the motor is not connected,
the display shows "Unknown".
Figure 3-3: Schematic circuit diagrams for 3RW44 soft starters in standard circuits
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. The soft starter would otherwise not recognize the current
circuit version (standard circuit or inside delta circuit) and would output the error
message: "Missing load phase 1-3", or ensure that the circuit is closed before
the 3RW44 is activated.
U1 V1 W1
V2
U2W2
U1 V1 W1
W2 U2
V2
L1
L2
L3
PE
3/N/PE~ 50 Hz 400 V
Q1
G1
M1
008_Standardschaltung Zeichnung mit Bildern 50%.wmf
Q11
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