Siemens Eupec, Manual

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Electrical Description MicroHarmony Cell Sizes 40 - 260A Manual
4-2 19001467: Version 1.0
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6. Base volt-ampere output rating of the cell. With 5% over modulation, maximum output voltage of cell is
750 x 1.78 x 1.05 / sqrt(3) = 809Vrms. VA = rated output current rating x 809Vrms
7. Amount of no load and load losses of the cell at rated output power. Watts and % of base VA given.
%Losses = Cell losses / (Base VA + cell losses) x 100%
8. Iin,cell = Iout,cell x 0.687, typical at rated input voltage and rated output power. Cell input current is
typically 2/3
rd
of output current.
9. Life expectancy of capacitors at a 40°C ambient, rated air flow, rated input voltage, rated output current,
neglecting over loads. Once the life is exceeded, the ESR doubles and the capacitance is reduced by 50%.
The capacitors should be replaced prior to end of life.
10. Life expectancy of capacitors at a 40°C ambient, rated air flow, 110% rated input voltage, rated output
current, neglecting over loads. Once the life is exceeded, the ESR doubles and the capacitance is reduced by
50%. The capacitors should be replaced prior to end of life.
11. Typical time, in minutes, for dc bus voltage to decay from rated dc bus to 50VDC after input power is
removed. The cell must not be touched, removed, or accessed until after this time.