Siemens Sinamics S120 Manual page 90

Cabinet design
6.3 Electromagnetic compatibility
Categories
Category C1
Drive systems with a rated voltage < 1000 V, which are intended for unrestricted use in the
first environment.
Category C2
Stationary drive systems with rated voltages < 1000 V for operation in the second
environment.
Drive systems, Category C2 may only be used in the first environment when they are
installed and commissioned by appropriately trained professionals, and the limit values for
harmonic currents are complied with.
Note
Professional person
A professional is a person or organization having the skills in installing and/or commissioning
power drive systems (PDS), including the associated EMC aspects.
Category C3
Drive systems with a rated voltage < 1000 V, which are solely intended for use in the second
environment.
Category C4
Drive systems for IT line supplies for operation in complex systems in the second
environment. An EMC plan must be drawn up.
Figure 6-1
90
Interrelationship between environments and categories
Power Units in Booksize C/D-Type Format
Manual, 01/2017, 6SL3097-4AC20-0BP1