EMC Installation Guideline
Engineering Information
SINAMICS Engineering Manual – November 2015
Ó Siemens AG
229/528
The EMC product standard defines criteria for evaluating operational characteristics in the event of interference, and
it defines interference immunity requirements and interference emission limit values depending on the local ambient
conditions. With respect to installation sites, a distinction is made between the “first” and “second” environment.
Definition of "first" and "second" environment
· "First" environment:
Residential buildings or locations at which the drive system is directly connected to a public low-voltage
supply without intermediate transformer.
· "Second" environment:
Locations outside residential areas or industrial sites which are supplied from the medium-voltage network
via a separate transformer.
“First” and “second” environment as defined by the EMC product standard EN 61800-3
Four different categories are defined in EN 61800-3 depending on the location and the output current of the variable-
speed drive.
Definition of categories C1 to C4
· Category C1:
Drive systems with rated voltages of < 1000 V for unlimited use in the "first" environment
· Category C2:
Fixed-location drive systems with rated voltages of <1000 V for use in the "second" environment. Use in the
"first" environment is possible if the drive system is installed and used by qualified personnel. The warning
and installation information supplied by the manufacturer must be observed.
· Category C3:
Drive systems with rated voltages of < 1000 V for unlimited use in the "second" environment.
· Category C4:
Drive systems with rated voltages of ³ 1000 V or for rated currents of ³400 A for use in complex systems in
the "second" environment.
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