SIEMENS
SINAMICS DCM
Engineering information
Notes for EMC-compliant drive installation
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Siemens D 23.1 · 2014
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Overview
Notes for EMC-compliant installation
These installation instructions do not claim to contain all details
and versions of units, or to take into account all conceivable
operational cases and applications.
Contact partners of the Siemens regional offices are available for
additional information or for specific problems, that have not
been handled in sufficient detail for your particular application.
The contents of these installation instructions neither form part
of nor modify any prior or existing contract, agreement, or legal
relationship. The particular contract of sale represents the over-
all obligations of Siemens AG. The warranty specified in the con-
tract between the parties is the only warranty accepted by the
Siemens AG. Any statements contained in these installation in-
structions neither create new warranty conditions nor modify the
existing warranty conditions.
Basic information about EMC
What is EMC?
EMC stands for "ElectroMagnetic Compatibility" and describes
the capability of a device to function satisfactorily in an electro-
magnetic environment without itself causing interference unac-
ceptable for other devices in the environment. Therefore, the
various units should not mutually interfere with one another.
Within the context of the EMC Directive, the SINAMICS DC
MASTER 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 inter-
ference immunity. Electrical units can 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 section of a converter unit should be viewed as a source
of interference and the control unit as potentially susceptible
equipment.
Product standard EN 61800-3
The EMC requirements for "Variable-speed drive systems" are
described in the product standard EN 61800-3. 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 limit values depending on the
installation location 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 supply without inter-
mediate 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
supplied from the medium-voltage line supply via their own
transformers.
Definition of the first and second environments
10 m
G_D023_EN_00020
Drive
(source of
interference)
Measuring point
for radiated
interference
Equipment
(affected by
interference)
Second
environment
First
environment
Measuring point for
conducted
interference
Industrial
low-voltage supply
Public
low-voltage
supply
Propagation
of conducted
interference
Medium-voltage line supply
Installation
limit
10 m
© Siemens AG 2014