7 Electrical Connection
SMA Solar Technology AG
Operating Manual
STPx0-3SE-40-BE-en-10
38
☐ Insulation stripping length: 12 mm
☐ Sheath stripping length: 80 mm to 90 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, the
connected AC backup loads, 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).
☐ Recommendation: Use a cable with the marking H07
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 A residual-current devices with a rated residual current of
100 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.
Overvoltage category:
The product can be used in grids of overvoltage category III or lower in accordance with
IEC 60664-1. That means that the product can be permanently connected to the grid-connection
point of a building. In case of installations with long outdoor cabling routes, additional measures to
reduce overvoltage category IV to overvoltage category III are required (see the Technical
Information "Overvoltage Protection" at www.SMA-Solar.com).
7.2.2
Connecting the Grounding
An additional grounding of the inverter is required to protect from touch current in case the
grounding conductor fails at the terminal of the AC cable.
The inverter features a grounding terminal with 2 connection points for grounding (e.g. when using
a grounding electrode).
The connection points have been labeled with the following symbol:
The required M5x12 screw with spring washer and washer is included in the scope of delivery of
the inverter.
Additionally required material (not included in the scope of delivery):
☐ 1 grounding cable
☐ 1 ring terminal lug M5
Cable requirements:
☐ Cross-section of grounding cable corresponds to the grounding conductor at the
AC-GRID
terminal, at least 2.5 mm²
Summary of Contents for SUNNY TRIPOWER 10.0 SMART ENERGY
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