Accurate measurement of leakage current of zinc oxide arresters under operating voltage is often affected by on-site electric field interference, harmonic pollution, and wiring methods. The KDX-9100 Zinc Oxide Arrester Tester addresses these conditions with a design in which the voltage and current sensors are fully isolated, and only low voltage is used inside the main unit, reducing the superimposed influence of external interference on measurement results.
The instrument supports measurement of the arrester's total current, resistive current, and their harmonic components under operating voltage, with a reference voltage rise rate of 100V/S±, facilitating on-site reference voltage testing according to regulations. During measurement, the instrument automatically compensates for inter-phase interference, reducing the cross-influence of adjacent phase live equipment on test data.
The test leads use a shielded structure, and the connectors have anti-misinsertion markings, reducing the probability of on-site wiring errors. The main unit and the high-voltage side transmit signals through isolated sensors, and all parts touched by operators are low-voltage circuits. The instrument has a built-in test data storage function that can record multiple measurement results, making it convenient for O&M personnel to compare historical data.
Suitable for routine inspection, outage pre-testing, and pre-commissioning acceptance of zinc oxide arresters in substations, power plants, and industrial power distribution systems. On-site O&M personnel can use this instrument to complete leakage current testing, resistive current analysis, and reference voltage verification, providing data reference for arrester condition assessment.
