9.2 Grounding the system
WARNING
Electric shock even 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 power unit is in a no-voltage condition:
● Always observe the five safety rules (Page 15) when carrying out any work on the device.
9.2.1 Grounding using the grounding harness
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.
Attaching the grounding spider
① Upper fixed spheres
② Lower fixed sphere
Figure 9-1 Schematic diagram: Attaching the grounding spider
Maintenance
9.2 Grounding the system
SINAMICS PERFECT HARMONY GH150 6SL3825
Operating Instructions 05/2020 93
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