SMA STP 10000TL-10 Installation - Manual (Page 29)

SMA Solar Technology AG 6 Electrical Connection
Installation Manual STP10-17TL-IA-en-32 29
6.3 Connecting the Electricity Grid (AC)
6.3.1 Conditions for the AC Connection
You must comply with the connection requirements of your network operator.
Residual Current Device
The inverter is equipped with an integrated all-pole-sensitive residual-current monitoring unit.
The inverter can automatically differentiate between residual currents and normal leading leakage
currents.
If an external RCD or residual-current device is strictly required, you must use a switch that trips at a
residual current of 100 mA or higher.
You will find further information for using an RCD in the technical information "Criteria for Selecting
an RCD" at www.SMA-Solar.com.
Overvoltage Category
The inverter can be deployed in grids of installation category III or lower, as defined under
IEC 60664-1. This means that it can be permanently connected at the grid-connection point in a
building. In installations involving long outdoor cable routes, additional overvoltage-reducing
measures must be taken so that the overvoltage category is reduced from IV to III (for further
information, see the Technical Information "Overvoltage Protection" at www.SMA-Solar.com).
Cable Dimensioning
The cable must be dimensioned in accordance with any local and national directives on cable
dimensions which specify requirements for the minimum conductor cross-section. Cable dimensioning
factors are e.g.: nominal AC current, type of cable, type of routing, cable bundling, ambient
temperature and maximum specified line losses (for calculation of line losses, see design software
"Sunny Design" with software version 2.0 or higher at www.SMA-Solar.com).