What mandatory step must be taken immediately after opening an HV circuit breaker and isolator?
Direct Answer
Option C: Prove equipment dead using approved calibrated HV voltage detector, then apply safety earths
Verification of zero energy is a critical safety step. Using a calibrated HV detector confirms the absence of voltage, while applying safety earths provides a low-impedance path to ground, protecting personnel from induced voltages or accidental energization, as mandated by standard marine electrical safety protocols and IEC 60092-503.
All Options
Detailed Explanation & Context
Verification of zero energy is a critical safety step. Using a calibrated HV detector confirms the absence of voltage, while applying safety earths provides a low-impedance path to ground, protecting personnel from induced voltages or accidental energization, as mandated by standard marine electrical safety protocols and IEC 60092-503.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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