Separating Adjacent Cabinets Using Unsuppressed Contactors; Laying Additional Wiring; Connecting The Power Unit; Connecting Power Cables - Siemens SINAMICS GL150 Operating And Installation Instructions

6.8

Separating adjacent cabinets using unsuppressed contactors

Do not use any contactors without suppression in the converter cabinets or in cabinets that
are connected to the converter cabinets. All contactors installed in the factory are already
equipped with a suppression circuit. If you use unsuppressed contactors in an adjacent cabinet,
you must partition off the cabinets using a lateral metal plate.
Connect surge suppression circuits to contactor solenoids that are connected to the same line
supply as the auxiliary power supply of the converter – or are located near the converter (e.g.
RC elements, varistors).
6.9

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 75)
6.10

Connecting the power unit

6.10.1

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
SINAMICS GL150 6SL38503UM114PA0Z
Operating Instructions 04/2017
6.8 Separating adjacent cabinets using unsuppressed contactors
Circuit breaker
Line-side transformer
Converter
Machine-side transformer
Motor
Shield support
Electrical connection
✓ Connect shield
X Do not connect shield
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