Automatic Restart Function (Option L32); Emergency Mushroom-Head Pushbutton (Option L45); Line-Side Grounding Switch (Option L48); Figure 3-10 Example Diagram: Line-Side Grounding Switch - Siemens SINAMICS PERFECT HARMONY GH150 Operating Instructions & Installation Instructions

Description
3.9 Options
3.9.12

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".
3.9.13

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 52)
3.9.14

Line-side grounding switch (option L48)

The motor-operated grounding switch is used to short-circuit and ground the line side.
Figure 3-10
A key-operated switch installed in the closed-loop control section door is used to control it.
Controlling this make-proof grounding switch is interlocked with the operating state and the
switch-on control of the converter.
50
Basic Line Module
Example diagram: Line-side grounding switch
SINAMICS PERFECT HARMONY GH150 6SL38253AE412AA1-Z
Operating Instructions Rev.201910281231 EXAMPLE