Basic Emc Rules - Siemens SINAMICS G120D Getting Started

Installation

3.6 Basic EMC Rules

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
Table 3- 1
M16 x 1.5
M20 x 1.5
M25 x 1.5
M32 x 1.5
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.
26
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
Getting Started, 07/2016, FW V4.7 SP6, A5E38556189B AA
Spanner width Article No.
SW * E
20 x 22.2 bg216mstri
24 x 26.5 bg220mstri
30 x 33 bg255mstri
36 x 39.5 bg232mstri
SINAMICS G120D converter