36 Product manual - PVS-175-TL;A.1 Version
EN
In order to improve the communication services and allow reaching of all the inverters in the chain, also
in presence of fault, it is recommended to create a ring shape layout by connecting both the first and the
last inverters of the chain to the local Ethernet switch (as shown in the picture).
Ring configuration
ROUTER
NOTE – D Please refer to “Connection of the communication and control signals” paragraph for
further information about the installation.
3.13 Topographic diagram of the equipment
The diagram summarises the internal structure of the inverter.
The internal circuitry is with double stage conversion and therefore consists of:
- DC/DC input converter (booster)
- DC/AC output inverter
The DC-DC converter and the DC-AC inverter both work at a high switching frequency and are therefore
small and relatively light related to output power.
The input converter is dedicated to multiple PV arrays with a maximum power point tracking (MPPT)
function in order to maximize the energy harvesting from the photovoltaic generator.
This inverter version is without insulation transformer, that it means that it do not have a galvanic
insulation between the input and the output. This allows ultimately an increase in conversion efficiency.
The inverter is already equipped with all the protections required for safe operation and to be in compliance
with the norms, even without the insulation transformer.
The operation and the protection management of the inverter is controlled by two independent DSPs
(Digital Signal Processors) and a central microprocessor.
A dedicate microprocessor is used for user communication interfaces.
The connection to the distribution grid is thus kept under control by two independent DSPs, in full
compliance with the electric field norms both for power supply to the systems as well as security.
The operating system carries out the task of communicate with its components in order to carry out data
analysis.
In doing all this, it’s guaranteed the optimal operation of the whole assembly and a high performance in
all irradiation conditions and it is always ensured a full compliance with the relevant directives, standards
and regulations.
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