Star Delta Reversing Starter" Control Function - Siemens SIMOCODE pro System Manual
Motor management and control devices
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Also See for SIMOCODE pro:
- Function manual (344 pages) ,
- Programming and operating manual (286 pages) ,
- Operating manual (278 pages)
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4.2.8
"Star delta reversing starter" control function
Description
With this control function, a motor can be started in both directions of
rotation in star-delta operation.
Control commands
• Clockwise rotation: Start with "ON >" first activates the QE1 contactor
control (star contactor) and then immediately activates the QE3 contactor
control (network contactor, clockwise rotation )
• Counter-clockwise rotation: Start with "ON <" first activates the QE1
contactor control (star contactor) and then immediately activates the QE4
contactor control (network contactor, counter-clockwise rotation)
• Stop with "OFF" deactivates the QE1, QE2, QE3 and QE4 contactor controls.
The control commands can be issued to SIMOCODE pro from arbitrary
control stations (see also the description of "control stations"). Thus, the
inputs (plugs) must be connected to the corresponding sockets, preferably
to the "Enabled control command" sockets.
Every fault message causes the QE1, QE2, QE3 and QE4 contactor controls
to be deactivated.
Switching from star to delta
For this, SIMOCODE pro first deactivates the QE1 contactor control before
connecting the QE2 contactor control (delta contactor).
SIMOCODE pro switches from star to delta:
• Current-dependent, for decreasing current below the following thresholds:
- Transformer installed in delta circuit: I < 150 % I
- Transformer installed in supply line: I < 90 % I
• Time-dependent to the time set in the parameter "Maximum star time" when
the current in the star operation does not sink below this threshold.
Switching the direction of rotation
It is possible to switch the direction of rotation if the signal
"Status - ON >" or "Status - ON <" has expired (motor switched off) AND
after the interlocking time has elapsed:
• Via the OFF control command.
• Directly, when the "Saving change-over command" is activated.
SIMOCODE pro prevents both contactors from switching on at the same
time.
Switching from one direction of rotation to the other can be delayed via the
"interlocking time".
Start-up is always in star mode.
SIMOCODE pro
GWA 4NEB 631 6050-22 DS 03
Motor control
s
s
4-33
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