SMA SC 400HE Installation - Manual (Page 27)

SMA Solar Technology AG Installation
Installation Guide SCxxxHE-IEN104432 27
4.3 Ventilation
Appropriate inlet ventilation is required for cooling the inverter. In order to guarantee safe operation
and maximum feed-in power, the permissible ambient temperature must be observed.
The required air is drawn through the switch cabinet doors and is blown out via the roof or the rear
panel of the cabinet unit depending on the Sunny Central model This allows the devices to be installed
directly next to each other. See the Sunny Central Installation Requirements (separate document) for
the air requirements as well as appropriate wall clearances. Filters for cleaning the inlet air are
installed at the inlet vents.
If the required volume of air at the installation site of the Sunny Central is too small, then on-site
measures must be taken to provide greater quantities of air (ventilation grills, blowers, fans, etc.).
The inlet air must satisfy the requirements of classification 3S2 (see table). Classification 3C2 must be
met if installation is to occur in chemically aggressive environments, e.g. installation near the sea. The
operation of the inverter is suited to a relative humidity of 15 … 95 %.
Air Quality Classification for Mechanically Active Substances
Environmental conditions for stationary
application Class
3S1 3S2 3S3 3S4
a) Sand in the air [mg / m³] - 30 300 3 000
b) Dust (suspended matter) [mg / m³] 0.01 0.2 0.4 4.0
c) Dust (fallout) [mg / m³] 0.4 1.5 15 40
Sites where appropriate measures are taken to
keep dust levels to a minimum. x x x x
Sites where no special measures have been taken
to reduce the sand or dust levels and which are
not located in the vicinity of sand or dust sources. x x x
Sites near sand and dust sources x x
Sites in production halls where sand or dust is
present, or sites in geographical locations where
the air is prone to high levels of sand and dust. x