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Description
3.8 Options
3.8.28
Automatic restart function (option L32)
With option "Automatic restart" (L32), the system automatically restarts when the line supply
fails, irrespective of how long the line supply failure was. Alarms are acknowledged
automatically and the drive is restarted.
Voltage Sensing Module (VSM)
With the "Automatic restart" option, a Voltage Sensing Module VSM10 is integrated in the drive.
The VSM10 acquires the actual voltage values at the medium-voltage level upstream of the
circuit breaker.
When the medium voltage is restored after a power failure, this is detected by the open-loop/
closed-loop controllers via voltage transformers when the input-side circuit breaker has
dropped out. The voltage transformers should be located at the medium-voltage level upstream
of the circuit breaker.
For safety reasons, a time limit between the power failure and the maximum permissible power
restoration time is incorporated to ensure that the drive does not restart in an uncontrolled
manner. As a further warning, an acoustic signal is output when the drive restarts.
You can find further information on the Voltage Sensing Module (VSM10) in Section
"Description of the Components".
3.8.29
Emergency mushroom-head pushbutton (option L45)
An Emergency mushroom-head pushbutton is installed in the cabinet door of the Control
Module. The contacts of the pushbutton are connected to the terminal strip so they can be
integrated in a protection concept of the plant site.
See also
EMERGENCY STOP Category 0 (option L66) (Page 51)
3.8.30
Cabinet lighting in the control section (option L50)
The cabinet lighting is automatically switched on using an integrated motion detector. If the light
is switched on by the motion detector, it stays on for three minutes.
3.8.31
Uninterruptible power supply (option L53)
The uninterruptible power supply (UPS) ensures that when a power failure occurs, the
converter provides a controlled output current to trip the safety elements. The line is restored
after the short circuit has been removed. The auxiliary supply is not available when a short-
circuit occurs in the line. All auxiliary equipment, which does not permit a brief interruption, must
be appropriately buffered. This is used to provide the minimum supply for all open-and closed-
control components of the converter.
50
SINAMICS PERFECT HARMONY GH150 6SL3826
Operating Instructions 05/2020
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