Dual power polarity protector/indicator
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United States of America Patent
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Nov 30, 2004
Grant Date -
Jun 12, 2003
app pub date -
Dec 10, 2001
filing date -
Dec 10, 2001
priority date (Note) -
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Abstract
A diode-configured power supply interface circuit prevents inadvertent miswiring of power supply leads to wrong polarity voltages of either primary or auxiliary DC supply voltages from triggering the operation of a circuit protection device installed in the power supply path of a telecommunication circuit. It also indicates whether the device's power terminals are properly connected to a power source, so that if inadvertently reversed, the wires can be properly reconnected, and thereby provide for delivery of power from either power source, as required.
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