SIEMENS
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Siemens D 11 · 2015
3
SINAMICS G130
Drive converter chassis units
75 kW to 800 kW
■
Characteristic curves
Derating data
SINAMICS G130 built-in units and the associated system com-
ponents are rated for an ambient temperature of 40° C and in-
stallation altitudes up to 2000 m above sea level.
At ambient temperatures > 40° C, the output current must be re-
duced. Ambient temperatures above 55° C are not permissible.
At installation altitudes > 2000 m above sea level, it must be
taken into account that the air pressure, and therefore air density,
decreases as the height increases. As a consequence, the cool-
ing efficiency and the insulation capacity of the air also de-
crease.
Due to the reduced cooling efficiency, it is necessary, on the one
hand, to reduce the ambient temperature and on the other hand,
to reduce the heat loss in the built-in unit by reducing the output
current, whereby ambient temperatures lower than 40° C may be
offset to compensate.
The following table lists the permissible output currents depend-
ing on the installation altitude and ambient temperature.
The specified values already include a permitted compensation
in respect of installation altitude and ambient temperatures
< 40° C (temperature at the air intake of the built-in unit).
The values apply under the precondition that a cooling air flow
through the devices is guaranteed as specified in the technical
specifications.
As additional measure for installation altitudes from 2000 m up
to 5000 m, an isolating transformer is required in order to reduce
transient overvoltages according to EN 60664-1.
For further information, please refer to the SINAMICS Low
Voltage Engineering Manual.
Current derating factors for built-in units depending on the ambient / air intake temperature and the installation altitude
Installation altitude
above sea level
Current derating factor
(as a percentage of the rated current)
for an ambient / air intake temperature of
m
20 °C
25 °C
30 °C
35 °C
40 °C
45 °C
50 °C
55 °C
0 ... 2000
93.3 %
86.7 %
80 %
2001 ... 2500
96.3 %
2501 ... 3000
100 %
98.7 %
3001 ... 3500
3501 ... 4000
96.3 %
4001 ... 4500
97.5 %
4501 ... 5000
98.2 %
© Siemens AG 2015