Siemens SINAMICS Series Operating Instructions Manual page 95

Interference emissions and interference immunity
EMC is dependent upon two properties demonstrated by the devices involved in the system:
interference emissions and interference immunity. Electrical devices may be sources of
interference (senders) and/or potentially susceptible equipment (receivers).
Electromagnetic compatibility is ensured when the existing sources of interference do not
impair the function of potentially susceptible equipment.
A device may even be a source of interference and potentially susceptible equipment at the
same time: For example, the power unit of a converter should be viewed as a source of
interference and the control unit as potentially susceptible equipment (interference sink).
Product standard EN 61800-3
Product standard EN 61800-3 describes the EMC requirements placed on "Variable-speed
drive systems" (power drive systems). A variable-speed drive system (or Power Drive
System PDS) consists of the drive converter and the electric motor including cables. The
driven machine is not part of the drive system. EN 61800-3 defines different limits for the
immunity to electromagnetic interference depending on the installation site of the drive
system, referred to as the first and second environments.
Residential buildings or locations at which the drive system is directly connected to a public
low-voltage network without an intermediate transformer are defined as the first environment.
The term second environment refers to all locations outside residential areas. These are
basically industrial areas which are powered from the medium-voltage network via their own
transformers.
Figure 6-1
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
Definition of the first and second environments
6.1 Instructions for EMC-compliant drive installation
Connecting
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