Speedfax 2017

For Operation in the Control Cabinet
3RW Soft Starters
Project Planning aids
3RW44 connection examples for main and control circuits
Main circuit
Control circuit
Possibility 1a:
Possibility 1:
Inline circuit with motor starter protector and SITOR fuse
Control by pushbutton
(semiconductor protection only)
L1
L2
L3
3/N/PE 400 V AC, 50 Hz
L1
1/N/PE 230 V AC 1) , 50 Hz
Q1
F2
F3
Q11
L1 L2 L3
(optional
semiconductor
protection fuse)
Q11
A1
Stop
S1
2)
Start S2
Motor on right
PS 1
No action
PTC type A
or
Thermoclick
CONTROL
PRODUCTS
17
No action
Reset S3
L+ L- IN1 IN2 IN3 IN4
T1
T2
Soft Starter
Control
M1
PE
T1 T2 T3
U1 V1 W1
M
3~
NSB0_01490b
PE
N
PE
96
A2 13 14 23 24 33 34 95 98
On period
No
action
No
action
Group
error
+
NSB0_01494c
Main circuit
Possibility 1b:
Possibility 1c:
Inline circuit with all-range Inline circuit with line and
protection
SITOR fuse
(line and semiconductor protection) (semiconductor protection only)
1) Permissible values for main and control voltage, see "Technical
specifications".
2) Caution: Risk of restarting!
Because the output is parameterized to "Motor ON", the start command is
automatically active after the reset command and a new, automatic restart
will take place. This applies especially in case of motor protection tripping.
For safety reasons we recommend connecting the group error output (terminals
95/96) in series with the output parameterized to "Motor ON".
17-290
Siemens Industry, Inc. SPEEDFAX Product Catalog