What is the purpose of earthing switches or portable earthing leads on isolated HV equipment?
Direct Answer
Option A: Discharge residual capacitive charge and short-circuit conductors to ground for safety
Earthing switches and portable leads are essential for safety, ensuring that all conductors are at zero potential. They discharge residual capacitive charges stored in cables and provide a definitive short-circuit path to ground, preventing lethal shock if the system is inadvertently energized while maintenance is being performed.
All Options
Detailed Explanation & Context
Earthing switches and portable leads are essential for safety, ensuring that all conductors are at zero potential. They discharge residual capacitive charges stored in cables and provide a definitive short-circuit path to ground, preventing lethal shock if the system is inadvertently energized while maintenance is being performed.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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