Siemens SINAMICS DCM Operating Instructions Manual page 56

Connecting
6.1 Instructions for EMC-compliant drive installation
Residential buildings or locations at which the drive system is directly connected to a public
low-voltage network without an intermediate 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 powered from the medium-voltage network via their own
transformers.
Figure 6-1
Four different categories are defined in EN 61800-3 Ed.2 depending on the installation site
and the power of the drive:
Category C1:
Category C2:
Category C3:
Category C4:
The figure below shows how the four categories are assigned to the first and second
environments:
56
Definition of the first and second environments
Drive systems for rated voltages < 1,000 V for unlimited use in the first
environment
Stationary drive systems for rated voltages < 1,000 V for use in the
second environment. Use in the first environment is possible if the drive
system is distributed and installed by qualified personnel. The warning
information and installation instructions supplied by the manufacturer must
be observed.
Drive systems for rated voltages < 1,000 V for exclusive use in the second
environment
Drive systems for rated voltages ≥ 1,000 V or for rated currents ≥ 400 A
for use in complex systems in the second environment
SINAMICS DCM Control Module
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619