SMA SB 1100LV - Manual (Page 17)

SMA Technologie AG Installation requirements
Installation Guide SB1100LV-11:SE2006 Page 17
AC cable system impedance should not exceed 1 ohm. This is necessary, amongst other
things, for the correct operation of impedance observation. In addition, we recommend
dimensioning the conductor cross-section so that line losses do not exceed 1% at the
nominal power. Line losses depending on the cable length and cross-section are shown
in the graph below. Multi-wire cables with copper forward and return conductors are
used.
The maximum cable lengths for the different cable cross-sections are as follows:
Conductor cross-section 1.5 mm² 2.5 mm²
Max. length 21 m 35 m
Do not use cables where the losses will exceed 1.0%
Cable length
Line l
o
ss
es