testers that the internal circuit is easily interfered when the oil sample is broken down by high voltage. The test process is fully automatic, accompanied by sound signal prompts, a large-screen LCD display, Chinese characters to display the measurement process and results, and a micro printer to print various test data. Test parameters such as mixing time, standing time, test times, etc. can be
[Related Keywords : Insulating oil breakdown, oil breakdown voltage, ASTM D877, insulating oil dielectric]