Siemens SINAMICS G120D - Page 48

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