Fronius IG 15 - Manual (Page 18)

10
The complex technical systems of innovative solar inverters make it ne-
cessary to design the display which is the interface with the user very
carefully. It is an unwavering design aiming at ease of operation and
permanent availability of the system’s data.
The FRONIUS IG unit is equipped with a basic recording function for
monitoring minimum and maximum data on a daily and a cumulative
basis directly from the display. There is also an option to allow the reading
of the following weather data on the display:
- two different temperature readings (for example temperature at the
solar modules as well as the outside temperature in the shade)
- insolation
In additition to the functions installed in the FRONIUS IG unit, a wide
choice of elements offered for data communication allows for many possi-
bilities of recording and visualising data. The respective components
required to upgrade the system are easy to install using the FRONIUS IG
DatCom operating instructions. The installation of system upgrades, such
as DatCom components, allows for possible remote system monitoring
Display func-
tion and data
communicati-
on
The FRONIUS IG unit is in charge of monitoring the mains network. This
responsibility comprises all measures necessary for the protection of
persons and machines in case of a power blackout.
The FRONIUS IG unit is programmed to stop operation immediately and
stop supplying power whenever conditions in the mains network deviate
from standard (for example when power is switched off or in case of any
other kind of interruption).
There are several ways how the FRONIUS IG unit can identify a mains-
cutoff, it can do so for example by monitoring:
- voltage
- frequency
- resistance (only FRONIUS IG with ENS)
For this purpose it is important that the specific monitoring procedures
applicable for the respective countries are carried out directly by the FRO-
NIUS IG unit without the use of additional electronic monitoring devices.
This will result in a substantial reduction of the installation work and cost.
Monitoring the
mains network
The FRONIUS IG is equipped with an HF-transformer (HF = high frequen-
cy) which assures a galvanic insulation between the DC side and the
mains. In addition, the HF principle results in a drastic reduction of the
transformer’s size, which means that it requires less space and has consi-
derably less weight. In spite of its full galvanic insulation, the FRONIUS IG
unit achieves a high degree of efficiency, due to its innovative circuit
schemes. Voltage trans-
formation and
galvanic insu-
lation
(continued)