LCDI power cord circuit
OwnerRaymond H. Legattiinventor
Life of this patent
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Abstract
A LCDI power cord circuit is provided. The includes energizing shielded wires and monitoring the energized shields for surges, e.g., arcing, and/or voltage drops, e.g., shield breaks detected by a Power Cord Fault Circuit (PCFC). The PCFC includes one dual purpose amplifying/switch transistor and the LCDI power cord circuit does not include any discrete capacitive components.
Claims16
A Leakage Current Detection Interrupter (LCDI) circuit for interrupting AC power from an AC source connected to a load via an insulated neutral wire surrounded by a neutral wire shield (NWS) and an insulated line wire surrounded by a line wire shield (LWS), the LCDI circuit comprising:
- a power supply circuit for supplying a rectified voltage waveform;
- a floating load connected to the power supply circuit, wherein the floating load comprises:
- a power cord fault circuit (PCFC) for monitoring the NWS and LWS integrity and leakage current;
- and
- wherein the LCDI does not include any discrete capacitors.
A Leakage Current Detection Interrupter (LCDI) circuit for interrupting AC power from an AC source connected to a load via an insulated neutral wire and an insulated line wire, wherein the insulated neutral wire and an insulated line wire are surrounded by a conductive shield (CS), the LCDI circuit comprising:
- a power supply circuit for supplying a rectified voltage waveform;
- a floating load connected to the power supply circuit, wherein the floating load comprises:
- a power cord fault circuit (PCFC) for monitoring the CS integrity, wherein the PCFC comprises:
- a solid-state amplifier (SSA) connectable to the CS;
- a bi-stable latching device having on/off states and wherein the SSA connected to the bi-stable latching device, the SSA being selectively turned on and off based upon sufficient application of a portion of the rectified signal positive pulse to a base of the SSA;
- and
- wherein the LCDI does not include any discrete capacitors.
A power cord circuit comprising a floating load, wherein the floating load comprises:
- a power cord fault circuit (PCFC) for monitoring power cord integrity, wherein the PCFC comprises:
- a dual-purpose solid-state amplifier/switch (SSA) connectable to a conductive shield (CS);
- a bi-stable latching device having on/off states and wherein the SSA connected to the bi-stable latching device, the bi-stable latching device being selectively turned on or off based upon application of a portion of a rectified signal positive pulse to a base of the SSA;
- and
- wherein the LCDI does not include any discrete capacitors.
Dependencies are inferred from the claim text.