Electrical Connection; Overview Of The Connection Area; Ac Connection; Requirements For The Ac Connection - SMA STP3.0-3AV-40 Operating Manual

6 Electrical Connection

6 Electrical Connection
6.1

Overview of the Connection Area

Figure 8: Connection areas at the bottom of the inverter
Position
A
B
C
D
E
F
G
6.2

AC Connection

6.2.1

Requirements for the AC Connection

AC cable requirements as follows:
☐ Conductor type: copper wire
☐ External diameter: 8 mm to 21 mm
☐ Conductor cross-section: 1.5 mm² to 6 mm²
☐ Insulation stripping length: 12 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. Examples of factors influencing cable dimensioning are: nominal AC current, type of
cable, routing method, cable bundling, ambient temperature and maximum desired line losses
(for calculation of line losses, see the design software "Sunny Design" from software
version 2.0 at www.SMA-Solar.com).
28 STP3-6-3AV-40-BE-en-13
Designation
One positive and one negative DC connector, input A
One positive and one negative DC connector, input B
Jack with protective cap for RS485 communication connection
Network port with protective cap
Jack with protective cap for the WLAN antenna
Jack for the AC connection
Connection point for an additional grounding
SMA Solar Technology AG
Operating manual