The high-voltage divider, also known as a digital high-voltage meter or AC&DC high-voltage divider, is an instrument specifically designed for precise measurement of industrial frequency AC high voltage, DC high voltage, and pulse/ lightning high voltage in the fields of power systems and electrical and electronic equipment manufacturing [4] [6]. This device consists of a high-voltage divider and a low-voltage display meter. It features a fully sealed insulating cylinder and a balanced equipotential shielding structure, and is equipped with precision high-voltage film capacitors, glass enamel resistors, and other components. The voltage ratio is typically 1000:1, and the measurement accuracy is 0.5% for DC and 1.0% for AC.
Its design combines high input impedance and anti-interference capabilities. It ensures safety through a metal enclosed shielding structure and DuPont material encapsulation technology. It supports operation in an environment ranging from -25 to 40°C. During operation, strict grounding and maintaining a safe distance are required. After measurement, discharge maintenance is necessary, and regular calibration is performed to maintain the error threshold [2-3] [7]. Typical products cover voltage levels from 50kV to 300kV. They are classified into three types based on core components: resistance type, capacitance type, and resistance-capacitance divider. They are suitable for AC and DC high-voltage measurement and power equipment inspection scenarios [1] [5].