Fronius IG 300 - Manual (Page 17)

9
The FRONIUS IG is responsible for monitoring the mains. This responsibility includes
implementing measures to protect operators and equipment alike in the event of a mains
failure.
The FRONIUS IG is programmed to stop working immediately and to cease feeding
current into the mains network in the event of abnormal conditions in the mains network
(e.g. mains disconnection or interruption).
The FRONIUS IG has a number of different ways of detecting a mains disconnection:
-
Voltage monitoring
- Frequency monitoring
- Over/under-voltage relay (optional)
In this context it is important to note that the specific monitoring procedures applicable in
the country concerned are implemented by the FRONIUS IG itself, and do not involve
any additional electronic measuring equipment. This significantly reduces the time
required for installation and the associated costs.
The FRONIUS IG is equipped with an HF transformer (HF = high-frequency) which
ensures that the DC side is galvanically isolated from the mains network. Furthermore,
the HF design enables the transformer to be significantly smaller, which means space -
and more importantly weight - requirements are considerably reduced. Despite the fact
that FRONIUS IG implements complete galvanic isolation, its innovatively designed
circuitry enables it to achieve a high degree of efficiency. Voltage transfor-
mation and
galvanic isolation
(continued)
The complexity of the technology in this new generation of photovoltaic inverters means
that a good deal of thought needs to go into the design of the display, which is, in effect,
the user interface. The display design is uncompromisingly oriented towards simple
operation and to making the system data available at all times.
The FRONIUS IG already has a basic function for logging minimum and maximum
values on a daily and total basis; this is done directly at the display. The display also
provides the option of displaying the following weather data:
-
2 different temperature values (e.g. temperature at the solar modules, outside
temperature in the shade)
- Insolation
In addition to the functions implemented in the FRONIUS IG, the wide range of data
communication elements enables a multitude of different data logging and display
options. The add-on system components required for this purpose are easy to install
(see operating instructions for FRONIUS IG DatCom). When add-on system compon-
ents such as DatCom components are installed, functions such as remote system
monitoring via a modem, sending an SMS message to a mobile in the event of a mal-
function, data display and comparison on a PC all become possible.
Monitoring the
mains network
Display function
and data commu-
nication