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 77)
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 Circuit breaker ✓ Connect shield
② Line-side transformer X Do not connect shield
③ Converter
④ Machine-side transformer
⑤ Motor
Figure 6-6 Shield support
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 Example: Equipotential bonding conductor
Electrical connection
6.12 Connecting the power unit
SINAMICS GL150 6SL38503UM114PA0Z
Operating Instructions Rev.201910301420 MUSTER 83
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