HV Exit Exam • Set 5 Question 25 of 30

Surge diverters (surge arresters) in power systems operate as:

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Direct Answer

Option A: Non-linear metal-oxide resistors that conduct rapidly to ground during overvoltage surges

Modern surge arresters utilize non-linear Metal-Oxide Varistor (MOV, ZnO) elements that present near-infinite impedance at normal voltage, but switch to low resistance during surges to clamp overvoltages.

All Options

Non-linear metal-oxide resistors that conduct rapidly to ground during overvoltage surges (Correct Answer)

Mechanical disconnecting switches

Inductive shunt reactors to correct low power factor

Harmonic filter capacitors

Detailed Explanation & Context

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

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