Siemens SINAMICS G120D Original Instructions Manual page 48

Installation
4.2 Electrical Installation
• 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.
EMC cable glands
Where cable glands are used within the installation of the system, it is recommended that
EMC glands are used.
The cable gland provides protection to the IP68 standard when fitted correctly.
Figure 4-13
Table 4- 10
M16 x 1.5
M20 x 1.5
M25 x 1.5
M32 x 1.5
48
Example of a Blueglobe EMC cable gland
Brass-nickel plated EMC cable gland with metric thread as per EN50262.
Connection thread/length
A D [mm] C [mm]
6.0 29
6.5 29
7.5 29
8.0 32
Clamping range Clamping range
without inlet max/min [mm]
max/min [mm]
11 ... 7 9 ... 7
14 ... 9 12 ... 7
20 ... 13 16... 10
25 ... 20 20 ... 13
Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
Spanner width Order No.
SW * E
20 x 22.2 bg216mstri
24 x 26.5 bg220mstri
30 x 33 bg255mstri
36 x 39.5 bg232mstri
Converter with control units CU250D-2