Description 01.04
3-12 SIEMENS AG 6SG7000-0BA76
SIMOTRAS HD Operating Instructions
1) Load values as a function of coolant temperature (refer to P077 in Section 11)
Ambient
temperature
Change in load values (percentage reduction "a")
or coolant
temperature
in devices with self-
cooling
in devices with
enhanced air cooling
+40º°C
+45º°C
+50º°C
0 %
– 6 %
– 0 %
– 5 %
– 10 %
2) Load values as a function of installation altitude (refer to P077 in Section 11)
0
20
40
60
80
100
%
Installation altitude
1000 2000 3000 4000 5000 m
Percentage
load "b"
67%
b1
Curve b1: Reduction factor of load values at installation altitudes above 1000 m
Permitted continuous current
Operating the converter continuously at the rated supply current I
n
is permitted. The limit temperature of the
thyristors will be reached.
It is not possible to accelerate out of this operating state, i.e. to increase the current!
The current should therefore be reduced before accelerating so the converter can cool down.
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