Siemens SINAMICS SM150 - Grounding the System; Grounding with a Grounding Device

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 with a grounding device
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.
Attaching the grounding spider
Secure the terminals of the grounding spider, first on the lower ball button ①, and then on the
upper ball buttons ②.
① Ball head in the cabinet ② Ball buttons in the motor cabinet
Figure 9-1 Grounding points
Maintenance
9.2 Grounding the system
SINAMICS SM150 6SL3845-7NN46-7AA2
Operating Instructions Rev.201910281345 EXAMPLE 137