SIEMENS
SINAMICS SM150
Medium-Voltage Converter
SINAMICS SM150 in IGBT version
4/15
Siemens D 12 · 2012
4
■
Technical specifications
Derating for special installation conditions
Current derating
If the converters are operated at installation altitudes from
1000 m above sea level or at ambient/coolant temperatures
> 40 °C for air cooling or with intake temperatures in the cooling
unit > 35 °, derating factors
k
H
or
k
T
must be taken into account
for the rated 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
(air cooling)
Derating factor
k
H
for air cooling
Current derating as a function of the installation altitude
(water cooling)
Derating factor
k
H
for water cooling
Current derating as a function of ambient temperature
Derating factor
k
T
(ambient temperature)
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 IGBT version
(water-cooled converter)
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 685 A.
k
H
1000
2000
3000
4000
0
m
Correction factor
G_D012_EN_00027
0.9
0.8
0.6
1.0
0.7
Installation altitude above sea level
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
10
20
30
40
5
45
°C
Correction factor
0.95
0.90
1.00
Ambient temperature
G_D012_EN_00025a
k
T
Drive unit
6SL3815-7NN38-0AA0
Output voltage
3.3 kV
Input voltage
3.3 kV
Type rating
4600 kVA, 800 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
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
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