SMA WB 5000 Installation - Manual (Page 15)

SMA Technology AG Overview
Installation Guide WB50_60-11:SE4005 Page 15
3.3 OptiCool ventilation system
The Windy Boy 5000 / 6000 is equipped with the patented OptiCool two-chamber
cooling system. At the same time, the Windy Boy's enclosure is integrated into the
temperature management and now serves not only to incorporate and protect the
internal components but also as a cool air and heat distributor.
As the central component of passive heat
abstraction, the heat sink is placed in the
enclosure, thus dividing it into two chambers.
The front chamber containing the electronic
components is especially sealed and thus
protected against infiltration by water, dust or dirt.
In addition, the heat sink, functioning as a partition
wall, provides enough space for the installation of
the heat-producing components.
The rear enclosure chamber contains the
components which develop high amounts of heat,
depending on their function, such as chokes and
transformers, which are either especially enclosed
or unsusceptible to external influences.
An active cooling unit is affixed to the underside of
the second chamber which has been specially
designed for this purpose. According to the
temperature, the power conductor and the
inductive components switch themselves on
automatically and vary the number of revolutions
as necessary for an even heat balance within the
device.
The air current provided by the fan is particularly
well channeled via a current tunnel and expels the
waste heat both from the heat sink and the other components in this area.
OptiCool makes for low component temperatures throughout the Windy Boy. This
leads to high levels of reliability and excellent overload behavior which both impact
considerably on the economic viability of the Windy Boy and, therefore, the PV
system as a whole.