What maintenance step is required before cleaning HV switchboard busbar compartments?
Direct Answer
Option A: Complete isolation, prove dead, apply portable earths, post warning signs, and issue HV PTW
High Voltage safety management requires a strict Permit to Work (PTW) system. Isolation, proving dead, and applying portable earths are mandatory to eliminate stored energy and induced voltages. These steps, aligned with industry best practices for HV safety, ensure a safe working environment before any physical contact with busbars.
All Options
Detailed Explanation & Context
High Voltage safety management requires a strict Permit to Work (PTW) system. Isolation, proving dead, and applying portable earths are mandatory to eliminate stored energy and induced voltages. These steps, aligned with industry best practices for HV safety, ensure a safe working environment before any physical contact with busbars.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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