Protection Device
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United States of America Patent
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N/A
Issued Date -
May 5, 2011
app pub date -
Mar 25, 2009
filing date -
Mar 31, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An overvoltage protection circuit is provided for protecting a load against overload damage, including a gross protection device for dissipating the major portion of the energy of the trouble event, a plurality of fine protection devices for limiting the remaining portion of the trouble energy to a safe value, and a diagnostic arrangement for determining the operating condition of the destructible gross and fine protection devices. A trouble event identifying arrangement compares with a reference voltage standard the residual output voltage existing between a pair of output terminals of the circuit, and a display arrangement indicates whether or not this residual output voltage meets the reference voltage standard.
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