Siemens SINAMICS G130 Engineering Manual page 128

EMC Installation Guideline
Engineering Information
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.
Low-voltage
public network
Measuring point for
conducted
interference
First
environment
Equipment
(affected by
interference)
"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 ≥ 1000 V or for rated currents of ≥400 A for use in complex systems in
the "second" environment.
SINAMICS Engineering Manual – May 2008
128/396
© Siemens AG
Medium-voltage network
Conducted
interference
Second
environment
Limit of facility
Measuring point for
emitted interference
Low-voltage
industrial network
Drive (noise
)
source