Note
Siemens offers its customers support in the form of a service contract. For further details,
contact your regional office or sales office.
Note
Inform the manufacturer about each maintenance job that has been carried out and about each
spare part replacement for the purposes of a reliability analysis.
9.2 Grounding the system
WARNING
Danger due to high voltage after shutdown
High voltages can still be present even after shutdown. Touching the device can result in death
or serious injury.
● Only work on the power unit if it has been sufficiently grounded. Before touching the device,
carefully ensure that the following parts of the power unit are de-energized and are in a no-
voltage condition:
– Internal busbars
– Input and output terminals
– Auxiliary power supply
● Always observe the five safety rules (Page 15) when carrying out any work on the device.
9.2.1 Grounding using the grounding harness
Use a three-pole grounding harness for fixed ball points to ground the system. When ordering
a grounding harness, contact Service & Support.
Use a sufficient number of grounding harnesses corresponding to the configuration. A
grounding harness is required for each three-phase system.
1. Secure the terminal of the grounding harness to the lower fixed sphere ②.
2. Secure the terminals of the grounding harness to the upper fixed spheres ①.
Maintenance
9.2 Grounding the system
SINAMICS PERFECT HARMONY GH150 6SL38253AE412AA1-Z
Operating Instructions Rev.201910281231 EXAMPLE 105
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