Circuit breaker
AssigneeFuji Electric Fa Components & Systems Co., Ltd.
InventorTakashi Hashimoto
Life of this patent
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Abstract
A circuit breaker includes a main circuit, a mechanical switch that switches the main circuit between a conduction state and an interruption state, a semiconductor device that is coupled in series on a downstream side of the mechanical switch and switches the main circuit between the conduction state and the interruption state, a sensor that outputs a signal according to a current flowing through the main circuit, a control circuit that detects the current flowing through the main circuit based on an output signal of the sensor, and a power supply circuit that is coupled to an upstream side of the mechanical switch via a first switch and supplies power to the control circuit when the first switch is turned on.
Claims11
A circuit breaker comprising:
- a main circuit;
- a mechanical switch configured to switch the main circuit between a conduction state and an interruption state;
- a semiconductor device coupled in series on a downstream side of the mechanical switch and configured to switch the main circuit between the conduction state and the interruption state;
- a sensor configured to output a signal according to a current flowing through the main circuit;
- a control circuit configured to detect the current flowing through the main circuit based on an output signal of the sensor;
- and
- a power supply circuit coupled to an upstream side of the mechanical switch via a first switch and configured to supply power to the control circuit when the first switch is turned on.
Dependencies are inferred from the claim text.