| 摘要 |
<p>PURPOSE:To make it posible to monitor the entire signal circuit in a low voltage part, in the potential transformer wherein a high voltage is detected by an impedance voltage divider and the output signal having a constant transformation ratio, by constituting the impedance voltage divider in the series and parallel constitution. CONSTITUTION:The detecting impedances 31-34 in the low voltage side are connected to a series impedance 2 on the high voltage side. Namely, the series circuit of the impedances 31 and 32 and the seires circuit of the impedances 33 and 34 are connected to the impedance 2 in parallel. Furthermore, a connecting point 3a of the impedances 31 and 32 is connected to the input of an amplifier 4 and a connecting point 3b of the impedances 33 and 34 is connected to a comparator 5. The output of the amplifier 4 is inputted to said amplifier 5, and the comparing operation is performed. When the variation in the ratio K1 between the voltage at the connecting point 3b and the voltage at an output 8 occurs, it is detected by the comparator 5, and a warning circuit 6 is actuated.</p> |
