Siemens 3RW44 - Page 225

Typical circuit diagrams
10.1 Connection examples for main and control circuits
3RW44 soft starters
Manual, 03/2017, NEB535219502000/RS-AB/008
225
Note
Parameter assignment
Set the control input functions to::
IN1: Motor CW PS1
IN2: Motor CCW PS1
IN3: Slow
-speed mode
IN4: Trip/reset (factory default)
The slow
-
speed parameters in parameter set 1 must be set. Motor CW means rotation in line
phase direction, motor CCW
means rotation against the line phase direction.
Note
The slow
-speed function is not suitable for continuous operation. The motor can heat up to
an inadmissible extent during continuous operation at slow speed.
Note
Risk of restart
The start
command must be reset prior to issuing a reset command, because the motor
attempts to restart again automatically if a start command is still active following this reset
command. This particularly applies if the motor protection has tripped.
K1, K2, K3 = r
elays for contact multiplication, e.g. for 230 V AC operation: 3RS 1800-1BP00