| 摘要 |
The specification discloses a solid state auto-reset circuit breaker intended for use in ac circuits, dc circuits and ac/dc circuits. A current sensing device is used to generate a voltage drop proportional to the current flowing through the device. When the voltage drop reaches a predetermined level, resulting from an over-current condition, it trips a control means that opens a solid state switch in the line. After a defined delay interval the circuit will automatically reset to close the solid state switch. If the over-current condition still exists, the control means will again open the solid state switch. This cycle is repeated at the delay interval until the over-current condition has subsided. Circuits are also disclosed which provide over-voltage protection, through detectors which trigger the control means when an over-voltage condition is detected. The application of the invention to lightning or surge protection is also disclosed, for single line and multiline environments.
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