Self-test mechanisms for end-of-life detection and response for circuit interrupter devices
AssigneeZe Chen
InventorsZe CHEN, Gui CHEN
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Abstract
A circuit for a circuit interrupter is provided. The circuit may in include a first SCR configured to receive a first trigger signal at a gate of the first SCR, a second SCR configured to receive a second trigger signal at a gate of the second SCR, and a third SCR configured to receive a third trigger signal at a gate of the third SCR. A cathode of the first SCR may be connected to an anode of the third SCR. A cathode of the second SCR and a cathode of the third SCR may be connected to a ground. Methods of operating a circuit interrupter and a circuit are also provided.
Claims20
A circuit for a circuit interrupter, comprising:
- a first SCR configured to receive a first trigger signal at a gate of the first SCR;
- a second SCR configured to receive a second trigger signal at a gate of the second SCR;
- a third SCR configured to receive a third trigger signal at a gate of the third SCR;
- wherein:
- a cathode of the first SCR is connected to an anode of the third SCR;
- and
- a cathode of the second SCR and a cathode of the third SCR are connected to a ground.
A method of operating a circuit interrupter, the method comprising:
- simultaneously generating a first trigger signal and a third trigger signal;
- receiving a status signal indicative of whether the circuit interrupter is in a reset state or a tripped state;
- and
- if the status signal indicates that the circuit interrupter is in a reset state, determining that the circuit interrupter is in an end-of-life condition.
A method of operating a circuit, the circuit comprising a microprocessor, a first SCR, and a circuit board with a first SCR mounting area with first, second, third, and fourth conductive traces, the fourth trace configured to receive power, wherein the first SCR is mounted on the first SCR mounting area such an anode of the first SCR is aligned with both the second trace and the fourth trace, the method comprising:
- receiving a signal from the second trace;
- and
- determining whether the SCR or its connection is faulty based on the signal.
Dependencies are inferred from the claim text.