Use in a sealed housing
When the power supply is installed in a sealed housing, 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 1 cm.
The following measurement results can be used as a reference to estimate the temperature rise within the housing.
| Case A | Case B |
|---|---|---|
Housing size | 180x180x165mm Rittal housing, protection class IP66 PK 9519 100, plastic | 180x180x165mm Rittal housing, protection class IP66 PK 9519 100, plastic |
Input voltage | 230Vac | 230Vac |
Load | 24V, 16A; (=80%) | 24V, 20A; (=100%) |
Temperature inside the housing | 51.7°C | 55.8°C |
Temperature outside the housing | 25.9°C | 25.6°C |
Temperature increase | 25.8K | 30.2K |