| 摘要 |
A high voltage detection device comprises a probe comprising an electrode for contacting a high voltage electrical line. The electrode is connected in series with a resistor. A meter comprises a housing enclosing an electrical circuit for measuring line voltage. The electrical circuit comprises an input circuit for connection to the probe. The input circuit is adapted to suppress high frequency noise pick up by the probe and develop a bipolar voltage representing measured line voltage. A voltage detection circuit comprises a differential amplifier circuit for converting the bipolar voltage to a proportionate voltage signal. A signal processing circuit receives the proportionate voltage signal and drives the display for displaying the measured line voltage. |
