SIEMENS
SINAMICS SM150
Medium-Voltage Converter
SINAMICS SM150 in IGCT version
5/19
Siemens D 12 · 2012
5
■
Technical specifications
Derating for special installation conditions
Current derating
If the converters are operated at installation altitudes above
1000 m above sea level or at deionized water temperatures
> 40 °C or raw water temperatures > 35 °, derating factors
k
H
or
k
T
must be taken into account for the rated output current
(DIN 43671). For the permitted continuous current
I
:
I
≤
I
N
×
k
H
×
k
T
I
permitted continuous current
I
N
rated current
Current derating as a function of the installation altitude
(water cooling)
Derating factor
k
H
for water cooling
Current derating as a function of the raw water intake
temperature
Derating factor
k
T
(raw water intake temperature)
Voltage derating
For installation altitudes >2000
m, acc. to EN
60664-1/VDE 0110
(IEC 60664-1) in addition to a current derating, a voltage derat-
ing is also required. This depends on the air and creepage dis-
tances in the unit.
Voltage derating as a function of installation altitude
Derating factor
k
U
Example
Derating data SINAMICS SM150 in IGCT version
For the current, the following applies:
I
≤
I
N
× 0.925 × 0.925 =
I
N
× 0.856
A current derating of 14.4 % is required.
The maximum available output current is 1497 A.
1000
2000
3000
4000
0
m
Correction factor
G_D012_EN_00028
k
H
0.9
0.8
0.6
1.0
0.7
Installation altitude above sea level
5
10
20
30
40
45
35
Correction factor
0.85
0.90
0.95
1.00
Raw-water inlet temperature
k
T
°C
G_D012_EN_00026a
Drive unit
6SL3845-7NN41-8AA0
Output voltage
3.3 kV
Input voltage
3.3 kV
Type rating
10000 kVA, 1750 A
Installation altitude
2000 m
Raw water intake temperature
40 °C
k
H
(water cooling)
0.925
k
T
(raw water intake temperature)
0.925
k
U
1.0
k
U
1000
2000
3000
4000
0
m
Correction factor
G_D012_EN_00029
0.9
0.8
0.6
1.0
0.7
Installation altitude above sea level
© Siemens AG 2012