Transformer state detection device and breaker
A state detection device and state detection technology are applied in the direction of measuring devices, instruments, measuring electronics, etc., to improve safety, overcome the influence of current signal sampling, and improve the effect of current measurement accuracy
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[0018] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:
[0019] Transformer state detecting device of the present invention, its basic circuit is as figure 1 As shown, including the secondary coil L1 of the detected transformer, resistors R1, R2, R3, R4, triode V1, a DC power supply V D 1 and a DC power supply V D 2. As shown in the figure, the secondary coil L1 is connected in series with resistors R1 and R2, and the DC power supply V D The positive electrode of 1 is connected to the connection between the resistor R2 and the secondary coil L1 to form a state detection circuit. DC power V D The positive electrode of 2 is connected to the collector of the triode V1 through the resistor R3, the base of the triode V1 is connected to point A on the connection line between the resistors R1 and R2, and the resistor R4 is connected between the base and the emitter of the triode V1. DC power V D 1 and DC suppl...
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