A specialized instrument used for on-site and laboratory testing of various related electrical parameters of arresters, 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 Chinese power industry standard "DL/T987-2005 General Technical Specifications for Resistive Current Testers of Zinc Oxide Arresters". This instrument adopts advanced technologies such as microcomputer sampling and control, and can measure the total current, third harmonic, resistive current, peak resistive current, capacitive current, active power, etc., of zinc oxide arresters under power frequency voltage. It also displays waveforms of voltage and current and provides print output. With a large-screen LCD display and Chinese menu prompts, it enhances human-machine interaction. It also provides on-site wiring display. This instrument features simple wiring, high measurement accuracy, and strong reliability [1] .
Technical Specifications:
1. Measurement Parameters and Range
Test Voltage: KV
Third Harmonic Voltage: KV
Total Current (Peak): 0-20 mA
Third Harmonic Current: 0-20 mA
Resistive Current (Peak): 0-20 mA
Peak Resistive Current: 0-20 mA
Capacitive Current (Peak): 0-20 mA
Arrester Power Consumption: 0-8W
In addition to displaying the above measured values, it can also display waveforms of voltage and total current.
2. Measurement Error
Test Voltage: ±2%
Total Current: ±2%
Resistive Current: ±5%
Capacitive Current: ±5%
Arrester Power Consumption: ±5%
3. Input Signals
Voltage Signal (PT low-voltage side): AC 5 ~ 200V
Current Signal: AC 0 ~ 20mA
4. Power Supply
AC 220V±10% 50Hz
5. Battery Continuous Working Time
More than 8 hours
6. Battery Charging Time
More than 6 hours
7. Instrument Dimensions
34cm×22cm×20cm
8. Instrument Weight
5kg (excluding cable box)
Overview
Intelligent Zinc Oxide Arrester Tester is mainly used for testing DC parameters of 6KV and 10KV zinc oxide arresters widely used in power systems. It features simple wiring, small size, light weight, portability, and can be powered by an external power source.
Technical Parameters:
Maximum Output Voltage: 35KV
Maximum Output Current: 1.2mA (at 30KV)
Maximum Output Power: 36W
Voltage Ripple Coefficient: 0.5%
Voltage Measurement Accuracy: ±0.5%
0.75 Times Voltage Accuracy: 1%
1mA Current Accuracy: ±0.5%
Current Measurement Accuracy: ±0.5%
Power Supply: AC 220V±15% or internal power supply
Operating Temperature: 25±10℃
Dimensions and Weight: 320mm×250mm×160mm 5.5kg
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