Siemens EK 726 Series Manuel de service Page 40

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ENGINEERING INFORMATION AND INSTRUCTIONS
MICROMASTER
MICROMASTER Vector
MIDIMASTER Vector
SIEMENS DA 64 – 2002/2003
Version D 3/16
3.9 De-rating
Voltage and current de-rating for high installation altitudes
100
90
80
70
60
100
90
80
70
60
500
1000
2000 3000
4000 1000
2000
4000
100
Installation altitude in m above sea level
Permissible supply voltage
as a % of the rated voltage
Permissible current as a %
of the rated current
Installation altitude in m above sea level
500
1000
2000
3000
4000
Max. pulse frequency referred to the line supply voltage
Pulse
frequency
4
8
0 480 540
16
2
Only MICROMASTER Vecto
r
Note:
The pulse frequency
is automatically
reduced
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