Photovoltaic system with overvoltage protection
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United States of America Patent
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Jun 3, 2014
Grant Date -
Oct 18, 2012
app pub date -
Apr 16, 2012
filing date -
Apr 16, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A photovoltaic system having a photovoltaic generator, whose strings with series-connected photovoltaic modules have a positive pole and a negative pole, and with an inverter whose DC input is connected to the two poles. The voltage of the positive pole and/or of the negative pole is measured with respect to ground, and a first switching element located between the positive pole and the DC input of the inverter and/or a second switching element located between the negative pole and the DC input of the inverter is opened, while a third switching element located between the positive pole and the negative pole is closed, when the voltage of the positive pole or of the negative pole exceeds a predefined first or second limit value.
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