106980 datasheet(20/25 Pages) PHOENIX

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Derating

17.1

Temperature-dependent derating

The device provides both the I

N nominal output current and

the I

dyn. BOOST dynamic output current at ambient

temperatures up to +60 °C.

For ambient temperatures

above +60°C, the ambient power must be decreased by

2.5% per Kelvin increase in temperature. For ambient

temperatures above +70°C or in the event of a thermal

overload, the device does not switch off. The output power

will be decreased by enough to allow device protection.

Once the device has cooled down, the output power will be

increased again.

Figure 20

Temperature derating in normal mounting

position

17.2

Installation height

The power supply can be operated at an installation height

of up to 2000 m without any limitations. Different data

applies for installation locations above 2000 m due to the

differing air pressure and the reduced convection cooling

associated with this (see technical data section).

Figure 21

Output power depending on the installation

height

17.3

Position-dependent derating

The power supply can be installed onto all 35 mm DIN rails

according to EN 60715. The normal mounting position of the

power supply is horizontal.

When installing in a different mounting position, derating

should be adhered to.

The characteristic curve can be used to determine the

maximal output power to be drawn for each ambient

temperature for different mounting positions.

[°C]

-25

1,5 x I

t≥5 s

dyn. Boost

H [m]

100

125

150

175

200

= P

150 %

60 °C

Dyn.

= P

100 %

60 °C

1000

2000

3000

4000

5000

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