Siemens SINAMICS G130 Engineering Manual page 55

Definition of categories C1 to C4 and associated permissible limits of interference voltage levels
•
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 ≥ 1000 V or for rated currents of ≥400 A for use in complex systems in
the "second" environment.
The diagram below shows the permissible interference voltage levels for categories C1, C2 and C3. Category C3 is
subdivided again into currents of < 100 A and > 100 A. The higher the category, the higher the permitted limit values
for conducted interference emissions. The requirements of category C1 can be met only through heavy filtering (blue
limit curve below), while category C4 demands only minimal filtering and is therefore not included in the diagram.
Permissible interference voltage levels in dB[μV] for categories C1, C2 and C3 (QP = quasi-peak values)
SINAMICS equipment is almost exclusively used in the "second" environment as defined by categories C3 and C4. It
is therefore equipped as standard with RFI suppression filters for the "second" environment, category C3. This
applies to SINAMICS G150 and S150 cabinets, to SINAMICS G130 Chassis and to the Infeeds of the modular
system S120 (Basic Infeeds, Smart Infeeds and Active Infeeds).
Optional RFI suppression filters are available for use in the "first" environment according to category C2 for
SINAMICS G130 / G150 as well as for SINAMICS S120 Basic Infeeds.
Standards
EN 61800-3
Adjustable speed electrical power drive systems, part 3: EMC requirements and specific test methodes
Variable-speed electrical drives fall into the scope of EMC product standard EN 61800-3 with regard to interference
emissions. This standard has been discussed in detail above.
Fundamental Principles and System Description
Frequency [MHz]
Engineering Information
SINAMICS Engineering Manual - May 2008
© Siemens AG
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