Part 3 of the insulation series is up: Solids and Liquids How Real Equipment Stays Insulated

This one focuses on what happens inside equipment where most failures actually begin.

Main points covered:
• How solid and liquid dielectrics respond to electric fields
• Why voids and moisture create localized stress
• How partial discharge starts and develops over time
• Electrical treeing and long term insulation degradation
• Why internal failures are often silent until the end

One of the biggest takeaways is that insulation does not usually fail all at once. It degrades over time as the electric field becomes concentrated in small defects.

If you’ve worked around cable failures, transformer issues, or insulation testing, you’ve likely seen the results of this process.

Watch here: https://youtu.be/wZX29jF0QAo

Curious to hear from others. Have you seen failures that were traced back to moisture, voids, or PD activity?