Use in a tightly sealed enclosure

When the power supply is installed in a tightly sealed enclosure, the temperature inside the housing is higher than outside. In this case, the temperature inside the housing is considered the ambient temperature for the power supply.

In the following test arrangement, the device is placed at the center of the housing, and there are no other heat-generating objects in the housing. The load is placed outside the housing.

The temperature sensor inside the housing is placed at the center of the right side of the power supply at a distance of 2 cm.

The following measurement results can be used as a reference to estimate the temperature rise within the housing.

Housing size:
254x180x165 mm Rittal housing, protection class IP66 PK 9522 100, plastic

Input voltage:
230 Vac

Load:
24 V, 32 A; (=80%)

Temperature inside the housing:
57.5°C

Temperature outside the housing:
23.6°C

Temperature increase:
33.9 K