Tracking index tester of CTI and PTI knowledge understanding
A, compared tracking index (CTI) : five test samples and can withstand the test of 50 drop process does not produce tracking failure and continuous flame highest voltage value. It also includes in 100 drop test on the material characteristics presented by the relevant instructions.
2, resistant to tracking index (PTI) : five test samples and can withstand the test of 50 drop process does not produce tracking failure and continue testing voltage value of the flame.
Third, informally, CTI is material can withstand 50 drop test process without the highest voltage tracking failure; PTI is to specify a test voltage, and then test to see material can withstand 50 under the voltage drop test process.
Four, resistant to tracking index is used as the accepted standards, can also be used for quality control of materials and components. Compared with tracking index is mainly used for the comparison of the basic features and features of the said materials.
Fifth, by applying the discretion of the test voltage and electrical pitting depth values to assess solid electrical insulating materials tolerance ability of wet surface discharge. Measure its tracking index (CTI and resistant to tracking index (PTI.
