Page 690 - 0700-schn-encl-10

Basic HTML Version

8/109
Thermal management system
The ambient temperature is higher than the desired temperature inside the enclosure.
The ambient temperature is lower than the desired temperature inside the enclosure.
The ProClima calculation software, available on our webiste, is an indispensable tool for the
selection of a thermal auxiliary.
Air-water exchangers
Air-water exchangers operate on the same principle as air-air exchangers. Fresh
air from the outside is replaced with cold water supplied by a network installed on
the industrial site. This change of fluid makes it possible to evacuate much larger
amounts of heat and, possibly, to reduce the temperature in the enclosure below the
temperature of the ambient air.
Temperature control in the enclosure is carried out by modulating the water flow.
The water circuit is protected by a shut-off device: your electrical installation is safe.
Cooling units
Cooling units can be used in the harshest environments, where the temperature
can reach 55 ºC. These devices are especially recommended when the desired
temperature inside the enclosure must be lower than the ambient temperature
or when a large amount of heat needs to be evacuated. As in the case of the
exchangers, they do not affect the IP of the switchboard.
The filter, placed at the inlet of the external air circuit, allows it to operate even
when the ambient air is charged with dust or oil particles. Easily replaceable and
quite inexpensive, this device guarantees the efficiency of the device throughout its
service life. These devices control the temperature inside the enclosure and include
an alarm function for signalling operational anomalies.
Cooling
Air-air exchangers
Air-air exchangers are devices that combine efficiency and simplicity. The hot
air flows of the enclosure and the cold of the surrounding environment, created
by two fans, circulate on either side of hermetic separation walls, preventing the
penetration of dust or moisture in the enclosure. The hot air from the switchboard
reheats these walls, which in turn are cooled by the fresh air from outside. The
transfer always takes place from the hotter side to the cooler side. This is why these
devices can only be used if the ambient temperature is at least 5 ºC lower than the
desired temperature inside the enclosure.
The aluminium exchange cassette forms the core of the system. This element can
be cleaned easily by simply removing it. In addition, the permanent operation of the
internal fan prevents the appearance of hot spots in the electrical switchboard. The
temperature regulation system integrated in the unit turns the external circuit fan on
and off.
08_108_111_CL0_005.indd 109
29/1