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Device for supplying a voltage to an electronic circuit, in particular an electronic circuit associated with a current sensor disposed on an electrical line
Device for supplying a voltage to an electronic circuit, in particular an electronic circuit associated with a current sensor disposed on an electrical line
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机译:用于向电子电路,特别是与布置在电线上的电流传感器相关的电子电路供应电压的装置
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摘要
A device for supplying a power supply voltage to an electronic circuit, in particular to an electronic circuit associated with a current sensor for measuring the electrical current in a high-tension line, comprises a current transformer having a primary circuit and a secondary circuit, a rectifier bridge shunting the secondary circuit and output terminals of the rectifier bridge, a first capacitor in parallel with a first resistor across which said power supply voltage is obtained, and a first switch disposed between the output terminals of the rectifier bridge. It includes between the output terminals of the rectifier bridge a branch comprising in series a second capacitor, a second switch and a second resistor. The first switch is controlled by a first threshold detector shunting the second capacitor. The second switch is controlled by a second threshold detector shunting the first capacitor. The first and second threshold detectors respectively close the first and second switches when predetermined first and second thresholds are respectively reached.
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