Grounding Converter And Motor - Siemens SINAMICS G120D Operating Instructions Manual

Installation
4.2 Electrical Installation
4.2.10

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 4-12
• 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.
50
Grounding the line supply and motor connectors
Converter with control units CU240D-2
Operating Instructions, 04/2014, FW V4.7, A5E34262100B AA