27
13
Derating
13.1
Derating for Ambient
temperature
The DC-UPS provides the In nominal
current to the load up to +50 °C ambient
temperature. At ambient temperatures
above +50°C, output current must be
decreased by
2.5 %/°C. When ambient
temperature e70°C or in the
event of thermal
overload, the device
does not switch off and continues to
supply the load. Output current is
automatically reduced to allow safe
operation and protection of the DC-UPS
Once the device cools down, the output is
enabled again.
Figure 13.1 – Temperature derating
13.2
Derating for Elevation
above sea level
The DC-UPS can be installed and
operated up to 2000 m elevation asl
without any limitations and derating.
When installed at locations above
2000
m, due to the lower air pressure and the
reduced convection cooling associated, a
derating will apply as by the chart below.
Figure 13.2 – Elevation derating
0
10
20
30
40
50
60
70
80
Ambient Temperature (°C)
0
10
20
30
40
50
60
70
80
90
100
110
120
O
ut
pu
t C
ur
re
nt
(%
)
O
ut
pu
t C
ur
re
nt
(%
)
Summary of Contents for DCU150M1224S
Page 8: ...8 3 3 Dimensions Figure 3 2 Side and front views ...
Page 24: ...24 ...
