Siemens SINAMICS G130 Engineering Manual page 93

Definition of categories C1 to C4 and associated permissible interference voltage limits
·
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.
The diagram below shows the permissible interference voltage limits 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 (interference voltages). 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 limits in dB[mV] for categories C1, C2 and C3 (QP = quasi-peak values)
SINAMICS equipment is used almost exclusively in the "second" environment as defined by categories C3 and C4. It
is therefore equipped as standard with line filters for the "second" environment, category C3. This applies to
SINAMICS G130 Chassis units, SINAMICS G150 converter cabinet units, the Infeeds of the SINAMICS S120
modular system (Basic Line Modules, Smart Line Modules and Active Line Modules) in Chassis and Cabinet Modules
formats and to the SINAMICS S150 converter cabinet units. Line filters compliant with category C3 are suitable for
TN or TT systems with grounded neutral.
Additional line filters are available as options for applications in the "first" environment in accordance with category
C2. This applies to SINAMICS G130 and G150 converters, all Infeeds of the SINAMICS S120 modular system (Basic
Line Modules, Smart Line Modules and Active Line Modules) in Chassis and Cabinet Modules formats and to the
SINAMICS S150 cabinet units. The optional line filters can be ordered as option L00 for all SINAMICS cabinet units
and are installed in each case in the Line Connection Modules LCM. Line filters compliant with category C2 are
suitable for TN or TT systems with grounded neutral.
Since the interference or leakage currents flowing across the line filters increase in proportion to the motor cable
length as described in section "Operating principle of line filters", the interference suppression effect of the line filters
decreases as the cable length increases. For this reason, the line filters supplied as standard reliably comply with the
interference voltage limits of category C3 and the additional line filters available as options with the relatively low
interference voltage limits of category C2 only if the motor cables used do not exceed the lengths specified in the
table below.
Fundamental Principles and System Description
Frequency [MHz]
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Engineering Information
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