Characteristic Analysis and Test Method of Pre-arc Seconds Characteristic of 12kV Drop-out Fuse

The 12kV drop-out fuse pre-arc time-current characteristic test is an important method to verify the quality of the fuse and the reliability of the fuse breaking. This paper summarizes the technical requirements of domestic and foreign test standards, combines test experience, analyzes the impact of test methods on product performance parameter test results, and gives test technical solutions and test standards. The results show that the reading value of the test current is the effective value of the full waveform of the test current, the expected current value is controlled within the range of -5% to + 5% of the target current value, and the test error meets the pre-arc time-current characteristic detection requirements; during the test process The current should be reasonably compensated according to the current attenuation to ensure that the current attenuation rate is less than 10%. The research results are a summary of the pre-arc time-current characteristic test schemes and standards for 12kV drop-out fuses, and have important practical guiding significance for improving the quality level of distribution fuses.