What condition occurs when electrical stress breaks down insulating properties of air or solid insulation?
Direct Answer
Option C: Dielectric breakdown / Flashover
Dielectric breakdown occurs when the electrical stress exceeds the insulating material's withstand capability, causing a sudden, violent discharge known as a flashover. This phenomenon is a primary cause of HV equipment failure, often resulting in severe arcing, equipment destruction, and significant safety hazards to nearby personnel.
All Options
Detailed Explanation & Context
Dielectric breakdown occurs when the electrical stress exceeds the insulating material's withstand capability, causing a sudden, violent discharge known as a flashover. This phenomenon is a primary cause of HV equipment failure, often resulting in severe arcing, equipment destruction, and significant safety hazards to nearby personnel.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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