SIEMENS
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Siemens CR 1 · 2015
6
Drive systems
SINAMICS S120 Cabinet Modules
■
Characteristic curves
Derating data for the chassis format
SINAMICS G120 Cabinet Modules and the associated system
components are rated for an ambient temperature of 40 °C and
installation altitudes up to 2000 m above sea level.
At ambient temperatures of > 40 °C, the output current must be
reduced. Ambient temperatures above 50 °C are not permissi-
ble.
At installation altitudes > 2000 m above sea level, it must be ta-
ken into account that the air pressure, and therefore air density,
decreases as the height increases. As a consequence, the coo-
ling efficiency and the insulation capacity of the air also decre-
ase.
Due to the reduced cooling efficiency, it is necessary, on the one
hand, to reduce the ambient temperature and, on the other, to lo-
wer heat loss in the Cabinet Module by reducing the output cur-
rent, whereby ambient temperatures lower than 40 °C may be
offset to compensate.
The following table specifies the permissible output currents as
a function of the installation altitude and ambient temperature for
the various degrees of protection (the permissible compensation
between installation altitude and the ambient temperatures
< 40 °C – air intake temperature at the entry to the Cabinet
Module – has been taken into account in the specified values).
The values apply under the precondition that it is ensured that
the cooling air, as specified in the technical specifications, flows
through the units as a result of the cabinet arrangement.
As additional measure for installation altitudes from 2000 to
5000 m, an isolating transformer is required in order to reduce
transient overvoltages according to EN 60664-1.
For additional information about this, please refer to the
SINAMICS Low Voltage Engineering Manual.
Current derating factors for Cabinet Modules as a function of the ambient/air intake temperature, the installation altitude and the degree of protection
Current derating for SINAMICS S120 Motors Modules,
chassis format as a function of the pulse frequency
To reduce motor noise or to increase output frequency, the pulse
frequency can be increased relative to the factory setting. When
the pulse frequency is increased, the derating factor of the out-
put current must be taken into account. This derating factor must
be applied to the currents specified in the technical specifica-
tions.
For additional information about this, please refer to the
SINAMICS Low Voltage Engineering Manual.
Derating factor of the output current as a function of the pulse frequency for devices with a rated pulse frequency of 2 kHz
Derating factor of the output current as a function of the pulse frequency for devices with a rated pulse frequency of 1.25 kHz
Degree of
protection
Installation altitude
above sea level
Current derating factor (as a % 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
IP20, IP21, IP23
0 ... 2000
100 %
100 %
100 %
100 %
100 %
93.3 %
86.7 %
2001 ... 2500
100 %
100 %
100 %
100 %
96.3 %
2501 ... 3000
100 %
100 %
100 %
98.7 %
3001 ... 3500
100 %
100 %
100 %
3501 ... 4000
100 %
100 %
96.3 %
4001 ... 4500
100 %
97.5 %
4501 ... 5000
98.2 %
Motor Module
in chassis format
Type rating
at 400 V
Output current
at 2 kHz
Derating factor
at pulse frequency
6SL3720-...
kW
A
2.5 kHz
4 kHz
5 kHz
7.5 kHz
8 kHz
380 … 480 V 3 AC
1TE32-1AA3
110
210
95 %
82 %
74 %
54 %
50 %
1TE32-6AA3
132
260
95 %
83 %
74 %
54 %
50 %
1TE33-1AA3
160
310
97 %
88 %
78 %
54 %
50 %
1TE33-8AA3
200
380
96 %
87 %
77 %
54 %
50 %
1TE35-0AA3
250
490
94 %
78 %
71 %
53 %
50 %
Motor Module
in chassis format
Type rating
at 400 V or 690 V
Output current
at 1.25 kHz
Derating factor
at pulse frequency
6SL3720-...
kW
A
2.0 kHz
2.5 kHz
4 kHz
5 kHz
7.5 kHz
380 … 480 V 3 AC
1TE36-1AA3
315
605
83 %
72 %
64 %
60 %
40 %
1TE37-5AA3
400
745
83 %
72 %
64 %
60 %
40 %
1TE38-4AA3
450
840
87 %
79 %
64 %
55 %
40 %
1TE41-0AA3
560
985
92 %
87 %
70 %
60 %
50 %
1TE41-2AA3
710
1260
92 %
87 %
70 %
60 %
50 %
1TE41-4AA3
800
1405
97 %
95 %
74 %
60 %
50 %
© Siemens AG 2015