DUAL-WARNING PROTECTOR HAVING MULTIPLE PROTECTIONS
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United States of America Patent
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Issued Date -
Mar 3, 2011
app pub date -
Sep 1, 2009
filing date -
Sep 1, 2009
priority date (Note) -
Abandoned
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Abstract
A dual-warning protector having multiple protections includes a protection circuit, a first alarm circuit and a second alarm circuit. The protection circuit includes two protection modules each having a thermistor, a semiconductor discharge tube, and a voltage dependent resistor. The protector provides multiple protections for the equipment, the circuit and the maintenance personnel, keeping the operating voltage steadily and not interrupting communication.
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