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Arrangement for supplying a voltage to an electronic circuit, particularly to an electronic circuit of a current sensor which is connected to an electrical line
Arrangement for supplying a voltage to an electronic circuit, particularly to an electronic circuit of a current sensor which is connected to an electrical line
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机译:用于向电子电路,特别是向与电线连接的电流传感器的电子电路供应电压的装置
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摘要
Device for the provision of a supply voltage to an electronic circuit, said device comprising a current transformer having a primary circuit (10) and a secondary circuit (11), a rectifier bridge (12) at the terminals of the secondary circuit, and at the output terminals (p, q) of the rectifier bridge, a first capacitor (c1) in parallel with a first resistor (r1) at the terminals of which is taken off the supply voltage (u), a first switch (i1) being disposed between the output terminals (p, q) of the rectifier bridge, characterized in that it comprises, between the output terminals (p, q) of the rectifier bridge, a branch comprising in series a second capacitor (c2), a second switch (i2) and a second resistor (r2), the first switch (i1) being controlled by a first threshold detector (ds2) at the terminals of the second capacitor (c2), the second switch (i2) being controlled by a second threshold detector (ds1) at the terminals of the first capacitor (c1).
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