A three-phase electrical system is equipped...

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Question 1 of 205eccefa4bacbc34ba4d483da

A three-phase electrical system is equipped with ground detecting lamps. If one of the lamps is dark, and remains dark when the test switch is operated, what does this indicate?

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Question 1 of 20

5eccefa4bacbc34ba4d483da

A three-phase electrical system is equipped with ground detecting lamps. If one of the lamps is dark, and remains dark when the test switch is operated, what does this indicate?

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🔍 Key Concepts

• Ground detection lamps in a three‑phase system and how they normally appear when the system is healthy • What happens to lamp brightness when one phase is grounded versus when two phases have grounds • The purpose of the test switch and what it simulates in the circuit

💭 Think About

• Think about what each lamp represents in relation to the three phases and ground. If one lamp is dark, what does that say about the potential difference at that point? • Ask yourself: when you operate the test switch, what condition are you trying to simulate in the system, and what would you expect to happen to all three lamps if the system were normal? • Compare what a single burned‑out bulb would look like versus a real ground fault in one or more phases—how would the test switch help you tell the difference?

✅ Before You Answer

• Verify what the normal indication is for all three lamps when there is NO ground on any phase • Confirm what the test switch actually does electrically (e.g., temporarily grounds or shifts the neutral) and how that should affect the lamps if they are all good • Make sure you distinguish between a failed lamp (open circuit at the bulb) and a grounded phase (fault between a line and ground) based on the fact that the lamp stays dark even during the test

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Question 1 of 205eccefa4bacbc34ba4d483da

A three-phase electrical system is equipped with ground detecting lamps. If one of the lamps is dark, and remains dark when the test switch is operated, what does this indicate?

Back

Question 1 of 20

5eccefa4bacbc34ba4d483da

A three-phase electrical system is equipped with ground detecting lamps. If one of the lamps is dark, and remains dark when the test switch is operated, what does this indicate?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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— No credit card needed