For troubleshooting purposes, the key...

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Question 1 of 2066636ef128f7522a1c522e99

For troubleshooting purposes, the key indicator to the safety and general condition of high voltage circuitry is insulation resistance. For a 6.6 kV high voltage system, what would be the recommended minimum insulation resistance value?

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🔍 Key Concepts

• Insulation resistance as an indicator of the health of high‑voltage equipment • Typical rule-of-thumb minimum megohm values for systems above 1,000 volts • Relationship between system voltage and recommended minimum insulation resistance values

💭 Think About

• Think about whether a single fixed value (like 1 megohm) is usually enough for all high-voltage systems, or whether higher voltages generally call for higher insulation resistance. • Consider how conservative you want to be when assessing the safety margin on a 6.6 kV system—would you choose a value that just barely passes, or one that reflects good, dry, healthy insulation? • Compare each option to the system voltage: does any choice reflect a commonly used simple rule-of-thumb relating kilovolts to megohms?

✅ Before You Answer

• Verify whether 1 megohm is considered an absolute bare minimum only for low- or medium-voltage equipment, rather than a good target for 6.6 kV. • Check if there is a common practice that associates 1 megohm per kilovolt (or similar) when estimating acceptable insulation resistance. • Make sure the chosen value provides a reasonable safety margin above emergency or ‘just acceptable’ limits for critical shipboard high-voltage power systems.

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