Siemens SINAMICS G120D - Basic EMC Rules

Installation
3.6 Basic EMC Rules
SINAMICS G120D converter
26 Getting Started, 07/2016, FW V4.7 SP6, A5E38556189B AA
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.
Image 3-6 Example of a Blueglobe EMC cable gland
Table 3- 1 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
Article 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
3.6
Basic EMC Rules
Measures to limit Electromagnetic Interference (EMI)
Listed below are the necessary measures that must be taken to ensure the correct
installation of the Inverter within a system, which will minimize the effect of EMI.
Cables
● Keep all cable lengths to the minimum possible length; avoid excessive cable lengths.
● Route always signal and data cables, as well as their associated equipotential bonding
cables, in parallel and with as short a distance as possible.
● Don't route signal and data cables and line supply cables in parallel to motor cables.
● Signal and data cables and line supply cables should not cross motor cables; if crossing
is necessary, they should cross at an angle of 90 °.
● Shield signal and data cables.
● Route particularly sensitive signal cables, such as setpoint and actual value cables, with
optimum shield bonding at both ends and without any interruptions of the shield.
● Ground spare wires for signal and data cables at both ends.