Pearson Electronics, Inc. Capacitive Voltage Divider VD-305A-AIR

The Model VD-305A capacitive voltage divider is intended for the measurement of voltage amplitude and wave-shape of ac signals at high potential. It has a nominal division ratio of 5000:1, and the exact measured ratio is printed on the name-plate. This ratio is measured in air at 22oC, and is accurate to ±5%. The division ratio is temperature compensated to ±1% over the range of 20o to 80oC. The unit consists of two capacitors connected in series. The high voltage center electrode forms a capacitor with a guarded pickup ring located in the lower metal cylinder. This pickup ring is connected to the center conductor of the output connector via a 50ω resistor. The low-voltage capacitor connects the pickup ring to the outer conductor of the connector. The output voltage is thus a fraction of the input voltage determined by the ratio of the capacitances. The maximum pulse voltage rating for use in air is 50 kV. This rating is for pulses up to 5 µseconds duration. Consult Pearson engineering for voltage derating for longer pulses.