Siemens SINAMICS G120D - Grounding Converter and Motor

Installation
4.2 Electrical Installation
Converter with control units CU250D-2
54 Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
4.2.14
Grounding converter and motor
Grounding the converter
● Ground the converter via the PE connection in the mains supply connector.
● Ground the connectors as shown in the diagram below.
Figure 4-16 Grounding the line supply and motor connectors
•
Connect the PE terminal on the left-hand
side of the converter to the metal frame it is
mounted on.
•
Recommended cable cross section: 10 mm²
•
Use a short wire connection preferably.
•
Clean the connection to the steel
construction from paint or dirt.
•
Use a ring clamp to ensure a good physical
connection which is resistant to accidental
disconnection.
Grounding the motor
● Ground the motor via the PE connection in the motor connector.
● Ground the connector as shown in the diagram above (grounding the converter).
Although the line and motor connectors are of a different type, the principle of grounding
them is the same.
● If possible, ground the motor housing.