HV Exit Exam • Set 5 Question 24 of 30

All of the following methods are standard techniques for measuring high AC voltages EXCEPT:

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Direct Answer

Option D: Hall effect DC current clamps

Hall effect sensors measure magnetic fields to determine current, not direct high AC potential. High AC voltages are measured via PTs, voltage dividers, sphere gaps, or electrostatic meters.

All Options

Capacitive / Resistive potential dividers

Potential (voltage) transformers

Electrostatic voltmeters

Hall effect DC current clamps (Correct Answer)

Detailed Explanation & Context

Hall effect sensors measure magnetic fields to determine current, not direct high AC potential. High AC voltages are measured via PTs, voltage dividers, sphere gaps, or electrostatic meters.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).

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