Application notes
PS1011-2420-0000
28
Version: 1.0
Fig. 16: Operation on two phases
Make sure that the conductor connected to the N terminal is fused appropriately.
The maximum permissible voltage between one phase and the PE must be below 300Vac.
4.5
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.
The power supply is positioned at the center of the housing. There are no other heat-generating elements in
the housing
The temperature sensor in the housing is positioned at the center on the right side of the power supply with a
distance of 1cm.
The following measurement results can be used as reference for estimating the temperature rise inside the
housing.
Case A
Case B
Housing size
180x180x165mm
Rittal housing,
protection class IP66
PK 9516 100, plastic
180x180x165mm
Rittal housing,
protection class IP66
PK 9516 100, plastic
Input voltage
230Vac
230Vac
Load
24V, 16A; (=
80%
)
24V, 20A; (=
100%
)
Temperature inside
the housing
48.3°C
55.3°C
Temperature outside
the housing
21.0°C
21.0°C
Temperature
increase
27.3K
34.3K
