SMA Enwitec Sunny Island 4.4M - Page 24

18_06_07_Battery Backup Distribution_10010371_ENG_V1.8 Seite -24- von -38-
Please note that there must always be a direct PE – cabling between your building’s distribution
and the main-equipotential bus bar. The PE-distribution within the Battery Backup Distribution
does not replace this direct PE-wiring to your local electrical distribution board of the building!
TN-S-System
Battery
Backup
Distribution
X1 PE X2
direct
PE-cabling!
TT-System
Battery
Backup
Distribution
X1 PE X2
direct
PE-cabling!
TN-C System
Network-operator
TN
-
S
-
System
Distribution Board
PE
-
Distribution
(g.e. NYY-J 5 x 16mm
2
)
(TN-C System)
TT-System
Network-operator
TT-System
Distribution Board
PE-Distribution
(g.e. NYY-J* 5 x 16mm
2
)
transformer
main fuses
counter
main
equipotential
bus bar
RCD is recommended
transformer
main fuses
counter
RCD is mandatory!
main
equipotential
bus bar