Siemens SINAMICS DCM Betriebsanleitung Seite 453

Table 10- 9 Derating factor for systems with armature rated DC current of ≥1500 A
Degree of Installation
protection altitude above
sea level
IP20 1000 m
IP21
2000 m
3000 m
4000 m
5000 m
IP23 1000 m
IP43
2000 m
IP54
3000 m
4000 m
5000 m
x ... SINAMICS DCM Cabinet operation not possible
Voltage derating as a function of the installation altitude (to ensure "protective separation"):
The SINAMICS DCM Cabinet series meets overvoltage category III according to EN 61800-
5-1 for line supply circuits with respect to the environment (other line supply circuits,
enclosures, electronics).
For electronics and field supplies with voltages of max. 2-ph 400 V AC (line-to-line;
maximum 230 V AC to ground), operation is permitted up to 5000 m above sea level.
For electronics and field supplies with voltages of 2-ph. 480 V AC (line-to-line; maximum 300
V AC to ground), operation is permitted up to 4500 m above sea level.
All units, with 400 V up to 575 V as well as also with 690 V to 950 V rated armature supply
voltage, can be operated up to a maximum of 4000 m above sea level without voltage
derating.
For units with rated armature supply voltages of 690 V to 950 V, up to 4500 m a maximum
930 V AC and up to 5000 m, a maximum 880 V AC is permissible as armature supply
voltage.
For units with rated armature supply voltages of 400 V to 575 V, up to 4500 m a maximum
550 V AC and up to 5000 m, a maximum 500 V AC is permissible as armature supply
voltage.
According to EN61800-5-1, operation of units without "safe electrical separation" is only
permissible if it can be absolutely excluded that persons are in danger by being able to
directly touch or indirectly touch parts, i.e. in operation, none of the CUD interfaces can be
touched. Data interfaces can be connected by optical isolation.
SINAMICS DCM Cabinet
Operating Instructions, 04/2015, A5E36161239/RS-AA/001
Ambient or coolant temperature
25 °C 30 °C
1.00 1.00
0.93 0.88
0.83 0.78
0.73 0.68
0.65 x
1.00 1.00
0.98 0.93
0.88 0.83
0.78 0.73
0.70 x
35 °C 40 °C
0.95 0.90
0.83 0.78
0.73 x
x x
x x
1.00 0.95
0.88 0.83
0.78 x
x x
x x
Technical specifications
10.2 General data
45 °C 50 °C
0.85 x
0.73 x
x x
x x
x x
0.90 x
0.78 x
x x
x x
x x
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