The lightning counter calibrator arrester is the lightning rod of the power system
The lightning counter calibrator (also known as arrester discharge counter tester) is a portable detection device specifically designed for power systems. Its core function is to simulate lightning impulses to test and calibrate whether the "lightning counter" installed on the arrester can record the number of lightning strikes normally and accurately.
Simply put, the arrester is the "lightning rod" of the power system, and the counter is its "driving recorder." If the counter fails due to moisture, corrosion, or other reasons, maintenance personnel cannot know how many lightning strikes the arrester has endured, which poses a hidden danger to grid safety. The calibrator is used to ensure that this "recorder" is always in good condition.
⚙️ Core Functions and Working Principle
The working logic of the lightning counter calibrator is very intuitive, which is to test the counter by simulating real lightning impulses:
Simulated lightning strike (counting verification): The instrument uses capacitor energy storage and discharge technology to output an 8/20μs impulse current wave that meets national and industry standards (i.e., the current reaches its peak within 8 microseconds and drops to 50% of the peak within 20 microseconds), with a peak current typically greater than 100A. This impulse current is applied to the arrester counter. If the counter operates normally and increments its reading, it indicates good performance.
Current calibration (some high-end models): In addition to testing counter operation, many modern calibrators also have leakage current verification functions. They can output precise DC currents from 0.1mA to 10mA (or higher) to calibrate the milliammeter on the counter, ensuring the accuracy of monitoring the arrester's daily leakage current.
