4
05.01
4.4 Current reduction/derating
4-92
© Siemens AG 2008 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 05/2008 Edition
4.4.2 Temperature–dependent derating
For an ambient temperature T > 40 °C, derating is required according to the
following rule:
X
TU
=100% – 2.5% (T
U
– 40 °C)
110
105
100
95
90
85
80
75
70
65
60
55
50
45
40
Power in %
Ambient temperature in °C
30.0 35.0 40.0 45.0 50.0 55.0
Fig. 4-8 Power as a function of the temperature
Notice
The maximum ambient temperature for operation of T
U
= 55 °C may not be
exceeded.
4.4.3 Installation height–dependent derating
For an installation altitude h > 1000 m above sea level, derating is required ac-
cording to the following derating characteristic:
110
105
100
95
90
85
80
75
70
65
60
55
50
45
40
Power in %
Installation altitude above sea level in m
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000
Fig. 4-9 Power relative to the installation altitude
4 Power Modules 10.0405.08
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