Siemens SINAMICS S120 Equipment Manual page 163

Low-voltage public
Environment
Fig. 7-1
Environ-
Fig. 7-2
Definition of environments 1 and 2
• Environment 1:
Residential buildings or locations at which the drive system is connected to a public low-
voltage supply without a transformer.
• Environment 2:
Industrial locations supplied by a medium-voltage network via a separate transformer.
Definition of categories C1 to C4
• Category C1:
Rated voltage <1000 V; unrestricted use in environment 1.
• Category C2:
Rated voltage for stationary drive systems <1000 V; for use in environment 2 For use in
environment 1 only when sold and installed by skilled personnel.
• Category C3:
Rated voltage <1000 V; use in environment 2 only.
• Category C4:
Rated voltage ≥1000 V or for rated currents ≥400 A in complex systems in environment 2.
Chassis Power Units Liquid Cooled
SINAMICS S120 Equipment Manual, Edition 12/2007, 6SL3097-2AM00-0BP4
network
Measuring point for
conducted
interference
1
Equipment
(affected by
interference)
Definition of environments 1 and 2
C1
C2
ment 1
C3
C4 C4
Definition of categories C1 to C4
Medium-voltage network
Conduction of
interference
Environment
2
Limit of facility
Measuring point for
emitted interference
Environ-
ment 2
Cabinet Design and EMC
7.2 Basic information about EMC
Low-voltage industrial
network
Drive
(noise source)
7-5