Surge arrester online monitor (also known as surge arrester leakage current and action recorder) is an instrument used in conjunction with zinc oxide surge arrester in high-voltage AC power systems. The instrument is connected in series in the grounding circuit of the surge arrester. The milliampere meter in the monitor is used to monitor the leakage current (peak value) passing through the lightning arrester under operating voltage, and can determine whether the inside of the lightning arrester is damp, whether the components are abnormal, and other situations

This machine adopts a large screen LCD display, easy-to-use high-precision sampling and processing circuits, and advanced Fourier harmonic analysis technology to ensure more reliable data.
The instrument adopts a unique high-speed magnetic isolation digital sensor to directly collect input voltage and current signals, ensuring the reliability and safety of the data. Support wireless synchronous voltage sampling method.
The instrument has functions such as resistive current fundamental peak output and edge phase correction. It is equipped with rechargeable batteries, calendar clocks, and micro printers, and can store 120 sets of measurement data.

Full current measurement range: 0-10mA effective value, 50Hz/60Hz
Accuracy: ± (reading X5%+5 µ A)
Accuracy of fundamental measurement of resistive current (quadratic method without phase to phase interference): ± (reading X5%+5 µ A)
Current harmonic accuracy: ± (reading X10%+10 µ A)
Reference voltage input range: 25V-250V effective value, total harmonic content<30% 50Hz/60Hz
Reference voltage measurement accuracy: ± (reading X5%+0.5V)
Accuracy of voltage harmonic measurement: ± (reading X10%)
Angle between fundamental current and fundamental voltage: 0-360
Battery working time: 6 hours for the host
Charging power supply: 220V ± 10% 50Hz/60Hz
Charging time: 5 hours
Host volume: 325X280X140
Host weight: 3.5Kg (excluding cables)
Working environment: Temperature: -1050 ° C Humidity:<90%