Function Overview; Device Concept; Intended Use - Fronius Primo serie Serviceanleitung, Ersatzteilliste

Function Overview

Device concept

The inverter has been designed exclusively for use in grid-connected photovoltaic sys-
tems. It cannot generate electric power independently of the grid.
The design and function of the inverter provide a maximum level of safety during both in-
stallation and operation.
The inverter automatically monitors the public grid. Whenever conditions in the electric grid
are inconsistent with standard conditions (for example, grid switch-off, interruption), the in-
verter will immediately stop operating and interrupt the supply of power into the grid.
Grid monitoring is carried out using voltage monitoring, frequency monitoring and monitor-
ing islanding conditions.
The inverter is fully automatic. Starting at sunrise, as soon as the solar modules generate
enough energy, the inverter starts monitoring grid voltage and frequency. As soon as there
is a sufficient level of irradiance, the solar inverter starts feeding energy into the grid.
The inverter ensures that the maximum possible power output is drawn from the solar mod-
ules at all times.
When there is no longer sufficient energy available to feed power into the grid, the inverter
shuts down the grid connection completely and stops operating. All settings and recorded
data are saved.
If the inverter temperature exceeds a certain value, the inverter automatically derates pow-
er output for self-protection.
The cause for a too high inverter temperature can be found in a high ambient temperature
or an inadequate heat transfer away (eg for installation in control cabinets without proper
heat dissipation).

Intended Use

The inverter is designed exclusively to be connected and used with nongrounded solar
modules. The solar modules cannot be grounded at either the positive or negative pole.
The solar inverter is designed exclusively to convert direct current from solar modules into
alternating current and feed this power into the public grid.
The following are deemed not to be in conformity with its intended purpose:
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(1) (2)
(6) (5)
utilization for any other purpose, or in any other manner
alterations to the inverter that are not expressly recommended by Fronius
installation of components that are not expressly recommended or sold by Fronius.
Device construction:
(3)
(1) Housing cover
(2) Inverter
(3) Wall bracket
(4) Connection area incl. DC main
switch
(5) Data communication area
(6) Data communication cover
The inverter transforms the direct current
generated by the solar modules into alter-
nating AC current. This alternating current
is fed into your home system or into the pu-
blic grid and synchronized with the voltage
(4)
that is used there.