Connecting Inverters In Compliance With Emc; Emc-Compliant Connection Of The Converter; Avoiding Electromagnetic Influence (Emi) - Siemens SINAMICS G120 Operating Instructions Manual

Installing

4.2 Connecting inverters in compliance with EMC

4.2 Connecting inverters in compliance with EMC
4.2.1

EMC-compliant connection of the converter

EMC-compliant installation of the inverter and motor are required in order to ensure
disturbance-free operation of the drive.
Install and operate inverters with IP20 degree of protection in a closed control cabinet.
Inverters with degree of protection IP55 are suitable for installation outside a control cabinet.
An overview of control cabinet installation and cabling can be found in the following section.
For further details, refer to the installation instructions of the Power Module.
The EMC-compliant connection of the inverter itself is described in the following sections.
4.2.2

Avoiding electromagnetic influence (EMI)

The inverters are designed for operation in industrial environments where high values of EMI
are expected. Safe, reliable and disturbance-free operation is only guaranteed if the devices
are installed by appropriately trained and qualified personnel.
Control cabinet design
● Establish all of the connections so that they are durable.
● Connect the metallic parts and components of the control cabinet to the frame of the
cabinet through a good electrical connection.
– Side panels
– Rear panels
– Cover plate
– Base plates
Use the largest possible contact area or many individual screw connections.
● Connect the PE bar and the EMC shield bar to the control cabinet frame through a good
electrical connection established through a large surface area.
● Connect all metal enclosures of the components installed in the cabinet with the control
cabinet frame through a large surface area to ensure a good electrical connection. To
achieve this, mount the components on a bare metal surface and mounting plate with
good conductivity, which you then connect to the control cabinet frame through the
largest possible surface area to establish a good connection, especially with the PE and
EMC shield bars.
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Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC