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9.2
Grounding the system
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,
● 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
upper ball buttons
①
SINAMICS SM150 6SL3845-2NN41-8AD0
Operating Instructions Rev.201908010908 EXAMPLE
WARNING
carefully ensure that the power unit is in a no-voltage condition:
②
.
Ball head in the cabinet
②
Ball buttons in the motor cabinet
Maintenance
9.2 Grounding the system
①
, and then on the
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