Motor Starting Adjustments - Siemens SIKOSTART 3RW34 Instructions De Service

Setup and Operation
7. De-energize main AC power and control power. Reconnect actuating signal wires to terminals A1 and A2.
8. Energize main AC power and control power. Initiate start by actuating pilot device(s). Check for proper operation
M1
Fig. 21 : Phase exchange for Inside Delta circuit
7.6

Motor Starting Adjustments

Observe the motor during the first trial starts. With the setup controls adjusted as described in Section 7.3 and soft
starter LED 1 on, start the motor.
Initial Voltage U. Ideally, the motor begins to rotate almost immediately after the starting voltage is applied to it and
the load begins to move. If the motor fails to start rotating when the starting voltage is applied, increase the U
potentiometer setting. If the motor accelerates too quickly, decrease the U setting. Repeat trial starts until the load
just begins to move when power is first applied.
Frequency of starting:
Keep cooling time in mind!
Start the motor. If more or less torque is required to start the driven machine, switch off the line voltage and turn the
potentiometer for the initial voltage in the right direction until the driven machine starts to rotate when power is first
applied. Two or three attempts may be necessary to set the correct initial voltage.
Additional initial voltage may be needed if motor is subject to starting load variance such as stiff belts or cold grease.
All changes to potentiometers do not take effect until the device is switched off.
22
Unit is now ready.
and desired starting performance. Verify proper motor rotation; if required, reverse rotation by interchanging
motor leads. Adjust potentiometers per Section 7.6.
L1
L2
L3
PE
Q2
Note:
I I I
The phase sequence should be
changed on the line side.
L1 L2 L3 Changing the phase sequence on the
PE
motor side can cause faults.
G1
3RW34
T1 T2 T3
W2 U1
W1 U2
V2 V1
NSB01351
Hazardous voltage.
Can cause death, serious injury, or
property damage.
To avoid electrical shock or burn, turn off main and
control voltages between starts when making
adjustments.
DANGER
WARNING
3ZX1012-0RW34-1AN1