Emc-Compliant Installation; Basic Information About Emc - Siemens sinamics dcp Operating Instructions Manual

Electrical connection

6.1 EMC-compliant installation

6.1 EMC-compliant installation
6.1.1

Basic information about EMC

What is EMC?
EMC stands for "electromagnetic compatibility" and describes "the capability of a device to
function satisfactorily in an electromagnetic environment without itself causing interference
unacceptable for other devices in the environment". Therefore, the various units used should
not cause interference to one another.
Within the context of the EMC Directive, the SINAMICS DCP units described in this
document are not "units" at all, but are instead "components" that are intended to be
installed in an overall system or overall plant. For reasons of clarity, however, the generic
term "units" is used in many cases.
Interference emissions and interference immunity
EMC is dependent upon two properties demonstrated by the units involved in the system:
interference emissions and interference immunity. Electrical units 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 unit 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.
Product standard EN 61800-3
EN 61800-3 defines different limits depending on the installation site of the system, referred
to as the first and second environments.
Residential buildings or locations at which the 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.
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Operating Instructions, 05/2016, A5E34382853K
SINAMICS DCP