Line-Side Grounding Switch (Option L48); Motor-Side Grounding Switch (Option L49); Cabinet Illumination And Service Socket In Closed-Loop Control Unit (Option L50); Disconnector At The Drive Output (Option L51) - Siemens Sinamics GM150 6SL3835-2LN44-2AA0 Operating And Installation Instructions

Description
3.6 Description of options
3.6.18

Line-side grounding switch (option L48)

When the make-proof grounding switch is closed, this option allows motor-driven make-proof
grounding switches that ground the line-side input voltage to be controlled automatically.
The motor-driven make-proof grounding switches are installed in an additional cabinet.
For safety reasons, the open-loop control system locks these make-proof grounding switches
so that they cannot be closed while voltage is still present. The control is integrated into the
protection and monitoring circuit. The make-proof grounding switches are closed automatically
when the standard make-proof grounding switch of the DC link is closed.
Observe the notes regarding the grounding switch provided in Chapter "Safety instructions
(Page 18)" and "Maintenance (Page 180)". Carefully comply with the 5 safety rules (Page 17).
3.6.19

Motor-side grounding switch (option L49)

Under the following circumstances, operating modes can occur for which there is the danger
that the motor returns power to the drive:
● Operating mode / variant of the load machine, e.g. drive group with gas turbine
● Type of drive machine, e.g. permanently excited motor
resulting in hazardous voltages.
When the make-proof grounding switch is closed, this option allows motor-driven make-proof
grounding switches that ground the motor-side output voltage to be controlled automatically.
The motor-driven make-proof grounding switches are installed in an additional cabinet.
For safety reasons, the open-loop control system locks the make-proof grounding switch so
that they cannot be closed while voltage is still present. The control is integrated into the
protection and monitoring circuit.
Observe the notes regarding the grounding switch provided in Chapter "Safety instructions
(Page 18)" and "Maintenance (Page 180)". Carefully comply with the 5 safety rules (Page 17).
3.6.20

Cabinet illumination and service socket in closed-loop control unit (option L50)

One universal light with service socket is installed in each cabinet element for the trigger and
control section. The universal light and the power socket are supplied externally with power and
must be fused with max. 16 A.
The cabinet illumination can be switched on manually or automatically by means of an
integrated motion detector (default setting). If the light is switched on by the motion detector, it
stays on for three minutes. The mode is selected via the switch on the light.
3.6.21

Disconnector at the drive output (option L51)

With this option, a motor-operated isolator is integrated at the drive output.
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SINAMICS GM150 6SL3835-2LN44-2AA0
Operating Instructions Rev.201910281250 MUSTER