IEC 60587:2007 outlines two test methods for assessing electrical insulating materials intended for use in harsh ambient conditions at power frequencies (ranging from 45 Hz to 65 Hz). The evaluation focuses on measuring resistance to tracking and erosion using a liquid contaminant and inclined plane specimens. The two methods are as follows:
- Method 1: constant tracking voltage
- Method 2: stepwise tracking voltage
NOTE 1: Method 1 is the more commonly used approach, as it requires less frequent monitoring.
NOTE 2: The test conditions are designed to accelerate the effects being studied, but they do not replicate all the conditions that may be encountered in actual service.
