Electrical device termination high temperature indicator
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United States of America Patent
Stats
-
Sep 11, 1984
Grant Date -
N/A
app pub date -
Mar 30, 1983
filing date -
Mar 30, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Temperature indicating apparatus for sensing overheating at a pair of terminals on an electrical power line comprises a pair of thermocouples, each thermally coupled to and electrically isolated from a different one of the terminals, and a light emitting diode (LED) coupled to the output of the thermocouples through a conditioning circuit. An excessive temperature rise at either terminal causes the output voltage of the thermocouple coupled thereto to increase, thus causing the LED +o to be lit and to provide a visual indication of overheating. A meter display may be provided to show the actual temperature of the terminals in response to thermocouple voltage output. A method for determining heating at a termination without physical intervention comprises determining the rate of temperature rise of the termination for a known current therethrough and comparing the rate to a predetermined rate threshold.
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