CIRCUIT PROTECTION APPARATUS FOR PHOTOVOLTAIC POWER GENERATION SYSTEMS
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United States of America Patent
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Issued Date -
May 24, 2012
app pub date -
Nov 23, 2010
filing date -
Nov 23, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A circuit protection device suitable for use with a photovoltaic power generation system. The circuit protection device includes an electronic control unit and a dual path fuse. The dual path fuse has a first current path defined by a main conductor and a second current path defined by a fuse element. In response to an overcurrent condition, the control unit activates the dual path fuse to open the first current path, thereby shunting current to the second current path. Residual follow-on current flows through the fuse element via the second current path until the fuse element melts. The control unit is programmable with multiple threshold current levels and associated time delays in order to provide different activation response times that are dependent upon the detected current level.
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