Ac Connection; Requirements For The Ac Connection - SMA SUNNY TRIPOWER CORE2 Operating Manual

SMA Solar Technology AG
Position
B
C
D
8.2

AC Connection

8.2.1

Requirements for the AC Connection

AC cable requirements as follows:
☐ Conductor type: aluminum and copper wire
☐ When using conductors made of aluminum wire, bimetal terminal lugs made of aluminum and
copper must be used to prevent direct contact of the copper bar with the aluminum wire.
☐ External diameter: 38 mm to 56 mm
☐ Outside diameter of each AC cable when using the optional AC sealing plate: 14 mm to
32 mm
☐ Conductor cross-section: 70 mm² to 240 mm²
☐ Conductor cross-section of grounding conductor: 35 mm² to 240 mm²
☐ Insulation stripping length: 30 mm
☐ Sheath stripping length: ≤ 375 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).
Residual-current monitoring unit:
The inverter does not require an external residual-current device when operating. If local
regulations require the use of a residual-current device, the following must be observed:
☐ The inverter is compatible with type B residual-current devices with a rated residual current of
1100 mA or higher (see Technical Information "Criteria for Selecting a Residual-Current
Device" in www.SMA-Solar.com for information on how to select a residual-current device).
Each inverter in the system must be connected to the utility grid via a separate residual-current
device.
☐ When using residual-current device with a lower rated residual current, there is a risk of false
tripping of the residual-current device, depending on the system design.
Operating manual
Designation
Connection for Ethernet communication
Cable gland for connecting the communication
Cable gland for the AC connection
8 Electrical Connection
STP110-60-BE-en-13 33