Calculation Examples - Siemens 6SN1123-1AA00-0DA2 Configuration Manual

10.04 05.08
05.01
5.4.4

Calculation examples

Temperature/
installation
S
altitude derating
S
S
Current reduction
Power module:
Operating mode:
Inverter pulse frequency:
Installation altitude
Ambient temperature
X
å I
å I
© Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
Supplementary conditions
Power module:
Operating mode:
Inverter pulse frequency:
Installation altitude
Ambient temperature
Determining the derating factors
(100% – 55%)  (6.3 kHz – 4.0 kHz)
X = 100% –
T
8.0 kHz – 4.0 kHz
= 100% – 2.5%  (45 °C – 40 °C) = 87.5%
X
TU
[ 85%
X
H
Calculating the permissible current values
 X  X  X = 56 A  0.74125  0.875  0.85 = 30.8 A
I = I
Nred N T TU H
 X  X  X
I = I
maxred max T TU
(100% – 55%)  (6.3 kHz – 4.0 kHz)
= 100% –
T
8.0 kHz – 4.0 kHz
 X = 56 A  0.74125 = 41.5 A
= I
N6.3 N T
 X = 112 A  0.74125 = 83.0 A
= I
max 6.3 max T
5 Power Modules
5.4 Current reduction/derating
6SN1123–1AA0 j –0EA1
FD
6.3 kHz
2000 m above sea level
45 °C
X = 55%
L
f = 4.0 kHz
0
I = 56 A
N
I = 112 A
max
= 74.125 %
= 112 A  0.74125  0.875  0.85 = 61.7 A
H
6SN1123–1AA0 j –0EA1
FD
6.3 kHz
<1000 m above sea level
<40 °C
X = 55%
L
f = 4.0 kHz
0
I = 56 A
N
I = 112 A
max
= 74.125 %
5
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