NDZnO-202 Zinc Oxide Arrester Live Tester

Product Introduction

      Zinc oxide arrester is an electrical product used to protect various electrical equipment in the power system from damage caused by overvoltage, offering excellent protective performance. To verify whether the performance of the zinc oxide arrester is normal, we have developed the zinc oxide arrester tester in a timely manner. This is a specialized instrument used for on-site and laboratory testing of various electrical parameters of arresters. It is widely applied in on-site online monitoring (live testing) and laboratory (outage maintenance) testing of zinc oxide arresters. It complies with the requirements of the power industry standard "DL474.5—92 Field Insulation Test Implementation Guide—Arrester Test".

      This instrument adopts high-precision sampling and processing circuits controlled by a high-speed microcomputer, along with advanced Fourier harmonic analysis technology, ensuring data reliability. It can measure the total current, resistive current, third harmonic current, fifth harmonic current, seventh harmonic current, fundamental voltage, active power, and the phase difference between voltage and current of the zinc oxide arrester under power frequency voltage. This helps determine the moisture ingress in the MOA insulation and the aging degree of the valve plates.

       The voltage measurement signal is transmitted wirelessly, eliminating the hassle of laying long voltage measurement lines due to the distance between the arrester and the PT.
       The device features a large-screen color LCD display, full Chinese menu prompts for operation, and print output, enhancing human-machine interaction. This instrument is characterized by simple wiring, high measurement accuracy, and strong reliability.

Product Features

☆ The instrument is a high-precision testing device specifically designed to detect the performance and quality issues of zinc oxide arresters; it also features electrical parameter testing, vector analysis, and harmonic testing capabilities.
☆ It can accurately measure various electrical parameters such as voltage, total current, resistive current, capacitive current, third harmonic current, fifth harmonic current, seventh harmonic current, phase difference between fundamental current and fundamental voltage, active power, and frequency.
☆ It can display the vector diagram of the measured fundamental voltage and fundamental current.
☆ Current measurement adopts direct wiring, ensuring greater accuracy of test data.
☆ Three measurement methods: wired, wireless, and without PT.
☆ All test interfaces feature a screen lock function for convenient reading and data analysis.
☆ Built-in large-capacity data memory allows all test data to be saved in record form for future reference.
☆ The instrument can be expanded with a USB interface for easy data transfer to a backend management computer.
☆ The instrument can be equipped with a mini printer for on-site test data printing.
☆ It includes a perpetual calendar and clock function, displaying the date and time in real-time. Test dates and times can be saved along with on-site detection data.
☆ Uses a large-screen imported color LCD as the display, with a Chinese operation interface and Chinese prompt information, featuring a multi-parameter display interface for user-friendly interaction.
☆ Conductive silicone buttons offer good tactile feedback, long lifespan, reasonable design, and easy operation.
☆ Built-in large-capacity, high-performance lithium-ion battery provides over 10 hours of continuous operation on a full charge.
☆ Compact size and lightweight design make it highly portable and ideal for on-site measurements.

Technical Parameters

☆ Input Characteristics
      Voltage Measurement Range: 0～120V
      Current Measurement Range: 0.0～10mA (clamp meter optional, extending range to 0～5A～25A)
      Phase Angle Measurement Range: 0～359.99°
      Frequency Measurement Range: 45～55Hz
      Number of Voltage Channels: Three channels (UA, UB, UC)
      Number of Current Channels: Three channels (IA, IB, IC)
      Harmonic Analysis Order: 16th order
      Storage Records: 500 entries
☆ Accuracy 
      Voltage: ±0.2%
      Frequency: ±0.005Hz
      Current, Power: ±0.5%
      Phase: ±0.5°
      Operating Temperature: －10℃～ +40℃
      Charging Power Supply: AC100V～220V, Frequency: 45Hz-55Hz
      Host Power Consumption: ≤3VA
      Wireless Transmission Distance: ≥800 meters (line-of-sight)
      Battery Operating Time: ≥10 hours
☆ Insulation
      ⑴ Insulation resistance between voltage/current input terminals and chassis: ≥100MΩ
      ⑵ Withstand test: 1.5kV (RMS) at power frequency between power input terminal and chassis for 1 minute
☆ Dimensions: 320×240×130mm³
☆ Weight: 2.6 kg