7 Electrical Connection
SMA Solar Technology AG
Operating manual
SB55-LV-JP-41-BE-en-13
26
7
Electrical Connection
7.1
Overview of the Connection Area
+ A −
+ B −
AC
F
A
C
B
G
D
E
Figure 7: Connection areas at the bottom of the inverter
Position
Designation
A
2 positive and 2 negative DC connectors, input A
B
2 positive and 2 negative DC connectors, input B
C
Jack with protective cap for the WLAN antenna
D
Jack for the AC connection
E
Connection point for connecting a grounding conductor
F
Network port with protective cap
G
Connection point for connecting a grounding conductor (optional)
7.2
AC Connection
7.2.1
Requirements for the AC Connection
AC cable requirements as follows:
☐ Conductor type: copper wire
☐ External diameter: 12 mm to 18 mm
☐ Conductor cross-section: 5.5 mm² to 8 mm²
☐ Insulation stripping length: 15 mm
☐ Sheath stripping length: 50 mm
☐ The cable must be dimensioned in accordance with the local and national directives for the
dimensioning of cables. The requirements for the minimum wire size derive from these
directives. Factors influencing cable dimensioning include nominal AC current, cable type,
routing method, cable bundling, ambient temperature and maximum desired line losses.
