Description
46/214 Revision 06 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • 864-5091.9 
 
                                                                                                                                                                       
18.4 Classification of 8DB10 according to IEC 62 271-200
Design and construction
Internal arc classification
18.5 Standards, specifications, guidelines
Basic prescriptions and
standards
The fixed-mounted circuit-breaker switchgear 8DB10 for indoor installation complies with 
the following prescriptions and standards:
DANGER
Internal arc classification
➭ With internal arc classification IAC A FL, the area behind the switchgear is not tested 
regarding the effects of internal faults. For this reason, access to this area must be 
prevented during switchgear operation.
Protect the area behind the switchgear, e.g. by means of a barrier in form of a chain, a tape 
or a beam.
Partition class PM (partition of metal)
Loss of service continuity category LSC 2
Accessibility to compartments Busbar compartment Tool-based
Switching-device compartment Tool-based
Low-voltage compartment Tool-based
Cable compartment Tool-based
Designation of the internal arc classification IAC
IAC class for
- Wall-standing 
arrangement
IAC A FL 40 kA, 1 s
- Free-standing 
arrangement
IAC A FLR 40 kA, 1 s
Type of accessibility A Switchgear in closed electrical service location
Access “for authorized personnel only“ according to IEC 62 271-200
- F Front
- L Lateral
- R Rear (for free-standing arrangement)
Rated short-time withstand current 40 kA
Rated duration of short circuit 1 s
IEC/EN standard VDE standard
Switchgear 62271-1 0671-1
62271-200 0671-200
Devices Circuit-breakers 62271-100 0671-100
Disconnectors/earthing switches 62271-102 0671-102
Voltage detecting systems 61243-5 0682-415
Surge arresters 60099 0675
Degree of 
protection
IP code 60529 0470-1
IK code 62262 0470-100
Insulation 60071 0111
Instrument 
transformers
Current transformers 60044-1 0414-1
Voltage transformers 60044-2 0414-2
Installation and earthing 61 936-1 / HD 637 -S1 0101
Insulating gas SF
6
Use and handling 62271-4 0671-4
Specification for new SF
6
60376 0373-1
Guidelines for the checking and 
treatment of SF
6
 taken from electrical 
equipment
60480 0373-2
Environmental conditions 60721-3-3 DIN EN 60 721-3-3