Laying Additional Wiring; Connecting The Power Unit; Connecting Power Cables - Siemens SINAMICS GL150 Operating Instructions Manual

6.11

Laying additional wiring

Keep any additional wiring in the cabinet as short as possible. Route the additional wiring tightly
against the cabinet enclosure or the mounting plates. You must twist unshielded cables
belonging to the same circuit (outgoing and return conductors).
See also
Electromagnetic compatibility (Page 91)
6.12

Connecting the power unit

6.12.1

Connecting power cables

Preconditions
You may connect the cable shields only to the transformer or the motor (away from the
converter).
①
②
③
④
⑤
Figure 6-6
Separately route back additional equipotential bonding conductors to the converter. The cross
section of this conductor must be at least as large as the total cross section of the shields.
Figure 6-7
SINAMICS GL150 6SL38555UN113KA0Z
Operating Instructions Rev.201910281450 EXAMPLE
Circuit breaker
Line-side transformer
Converter
Machine-side transformer
Motor
Shield support
Example: Equipotential bonding conductor
Electrical connection
6.12 Connecting the power unit
✓ Connect shield
X Do not connect shield
97