EN
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3. Cables bending radius.
Sides
(C)
minimum required free space may depends from cable
type (cable dimension, bending radius, etc..). This evaluation
must be done by the installer during the plant design phase (refer
to
“Routing the cable to the inverter”
paragraph for more
information). In any case the minimum required free space useful
for a proper ventilation of the unit (near side fans) cannot be under
15cm
on the right side and
30cm
on the left side.
C
C
NOTE –
D
In case of manual installation, using handles
(04)
, consider a free side space to lift the inverter of 60 cm
minimum on both sides.
NOTE –
D
In case of installation with lifting equipments
(eyebolts and ropes) the side distances (C) could be reduced
at the minimum required but a subsequent manual lifting it
will no longer be possible: in this case the lifting equipments
should remain available on the field for any subsequent
operation.
5.2.4 Installation of multiple units
• In case of installation of multiple units in the same place, position
the inverter side by side paying attention to keep the minimum
clearance distances (measured from the outer edge of units) as
shown in the picture below.
30 cm
30 cm
30 cm
• The installation of two inverters positioned back to back is also
permitted on a structure which must be composed of a 2 or 3
frame supports (refer to
paragraph). In this
case the minimum recommended clearance distance between
the units in order to avoid the use of an air deflector is 30cm.
30 cm
5.2.5 Wireless signal environmental checks
The inverter can be commissioned and monitored using the
wireless communication channel. The WLAN board of the inverter
uses radio waves to transmit and receive data. It is therefore
important to assess this factor in order to have an optimal
installation.
Walls made in reinforced concrete and surfaces covered with
metal (doors, shutters, etc.) might significantly reduce the reach of
the device which, even in optimal conditions, is approximately 40
metres in free space.
Before installing the inverter it is therefore recommended to
check the strength of wireless signal by means a mobile device
(smartphone, tablet or notebook) by connecting it to the wireless
router from a position which is close to the intended installation
position of the inverter.
The radio signal level between the inverter and the wireless router
can be improved in a two ways:
1. Find a new position for the router considering the different types
of materials which the radio signal will have to pass through
Material
Relative signal reduction
Open field
0% (strength of approximately 40
metres)
Wood / Glass
From 0 to 10%
Stone / Plywood
From 10 to 40%
Reinforced concrete
From 60 to 90%
Metal
Up to 100 %
NOTE –
D
The quality of the RF signal can be assessed during
the installation stage where the signal is displayed in dBm.
2. Install a wireless signal repeater and place it in an area between
the inverter and the router, trying in this way to skip the most critical
obstacles.
5.2.6 Installations above 2000 metres
Due to the rarefaction of the air (at high altitudes), particular
conditions may occur and it should be considered when choosing
the place of installation:
Less efficient cooling and therefore a greater likelihood of a
device power reduction (derating) occur due to high internal
temperatures.
Reduction in the dielectric resistance of the air which, in the
presence of high operating voltages (DC input), can create
electric arcs (electrical discharges) that may damage the device.
When the altitude increases, the failure rate of some electronic
components increases exponentially due to cosmic radiation.
NOTE –
D
All installations at altitudes exceeding 2000
metres are not recommended on the basis of the criticalities
indicated above.
5.2.7 Installations with a high level of humidity
ATTENTION –
A
Never open the inverter in the case of rain,
snow or a level of humidity >95%.
ATTENTION –
A
Always carefully seal all unused openings.
Even though the device is equipped with an anti-condensation
valve, air with extremely high levels of humidity can lead to the
creation of condensation inside the inverter.
As the inverter is almost completely insulated from the outside,
condensation can also form after installation in certain weather
conditions.