SMA STP 10000TL-10 Installation - Manual (Page 16)

3 Product Description SMA Solar Technology AG
16 STP10-17TL-IA-en-32 Installation Manual
3.5 Surge Arrester Type II
Along with the thermally monitored varistors which are integrated as standard, the Sunny Tripower is
equipped with module slots for the additional installation of surge arresters of Type II. If the modules
are connected, they will be monitored. If a module has tripped, a warning is issued via the display or
external communication (e.g. Sunny WebBox or Sunny Explorer). This makes it easy to integrate the
Sunny Tripower into a lightning protection concept. The required modules are available as retrofit kits
for input A or input A+B.
3.6 Intelligent String Failure Detection
The Sunny Tripower is equipped with a system that recognises the total failure of individual strings or
partial strings (see the diagram below). With a PV module current of approx. 1 A, monitoring of up to
six partial strings per string input is possible. The prerequisite for the reliable functioning of the intelligent
string failure detection is an identical alignment of the connected PV array at input A and input B.
For the learning phase, the Sunny Tripower needs approximately 14 days at moderate irradiation after
successful activation. One advantage of this system is that its auto-adaptive function completely
eliminates the necessity of any configuration. In the event of a string failure, a warning message is issued
on the display or via external communication (e.g. Sunny WebBox or Sunny Explorer). Note that
extreme shading and snow-covered PV modules trip warning messages.