Drive Amplifier SD4B
Environmental conditions Operation acc. to DIN EN IEC 60721-3-3
Degree of pollution acc. to DIN EN
61800-2
2
Max. site altitude 2000 m above MSL (Units with air cooling only: 100 % rat-
ed current up to 1000 m above MSL; at higher altitudes
the rated current must be reduced by 1.5 % per 100 m.)
Moisture level of human skin Dry
Chemically active substances Class 3C1 (no salt spray)
Mechanically active substances Class 3S1 (no requirement)
Class Class 3M2
2 to 8 Hz: Amplitude excursion = 1.5 mmVibrations
9 to 200 Hz: Amplitude of acceleration = 5 m/s²
Mechanical stability
Shock Peak acceleration = 40 m/s²
Biological influences Class 3B1 (no requirement)
UV resistance No requirement
Tab. 2: Environmental Conditions during Operation
Tab. 2: Environmental Conditions during Operation
Important
Make sure that the aeration elements are free and open, so that the air circulation is not
restricted.
5.4.3 Current Derating Due to Site Altitude and
Temperature
The following table indicates the rated current in percent depending on the site altitude
and the ambient temperature:
Site altitude above MSL
Temperature
≤1000 m ≤2000 m
≤40 °C 100 % 85 %
≤50 °C 85 % 70 %
≤60 °C 70 % 55 %
Linear interpolation is allowed.
Tab. 3: Current Derating Due to Site Altitude and Temperature
Tab. 3: Current Derating Due to Site Altitude and Temperature
5.4.4 Current Derating Due to Low Speed
During phases of a static rotating field or low rotating field frequencies (f ≤ 5 Hz) the
power semiconductors of the output stage are subject to higher loads.
20 Drive Amplifier SD4B - Hardware Description
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