As shown in figure "C" of the illustrated...

Question 1 / 2066636eed28f7522a1c51da9a

Question 1 of 2066636eed28f7522a1c51da9a

As shown in figure "C" of the illustrated typical ground fault sensor, what statement concerning its installation is true? Illustration EL-0223

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Question 1 of 20

66636eed28f7522a1c51da9a

As shown in figure "C" of the illustrated typical ground fault sensor, what statement concerning its installation is true? Illustration EL-0223

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🔍 Key Concepts

• Residual (zero-sequence) current in a 3‑phase system: the vector sum of the three phase currents under normal, no‑fault conditions • Operation of a window-type current transformer (CT) used as a ground fault sensor • Difference between power conductors through the window and small CT secondary leads on the terminal screws

💭 Think About

• In a healthy 3‑phase, 3‑wire circuit, what must the sum of the three phase currents be for the CT output to be zero? What does that tell you about how many phase conductors must pass through the window? • Are the terminals on the sensor intended to carry the full motor feeder current, or just the small current going to the ground‑fault relay input? How does the illustration support your conclusion? • If only one or two phase conductors passed through the window, what would the sensor see even under normal balanced load?

✅ Before You Answer

• Verify in the illustration whether the three motor feeder conductors appear to pass through the sensor window in figure A. • Confirm that the relay is wired to the small terminals on the sensor, while the power feeders do not land on those terminals. • Make sure the statement you choose clearly distinguishes between conductors passed through the window and connections made to the small sensor terminals.

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Question 1 of 20

As shown in figure "C" of the illustrated typical ground fault sensor, what statement concerning its installation is true? Illustration EL-0223

Any two of the motor feeder conductors are connected to the two wire terminals in the upper right hand corner of the sensor as shown in the illustration and the ground fault relay sensor lead connections are passed through the window.

Any one of the motor feeder conductors is passed through the window and a connection is made between the ground fault relay sensor terminals and the two wire terminals in the upper right hand corner of the sensor as shown in the illustration.

Question 1 / 2066636eed28f7522a1c51da9a

Question 1 of 2066636eed28f7522a1c51da9a

As shown in figure "C" of the illustrated typical ground fault sensor, what statement concerning its installation is true? Illustration EL-0223

Back

Question 1 of 20

66636eed28f7522a1c51da9a

As shown in figure "C" of the illustrated typical ground fault sensor, what statement concerning its installation is true? Illustration EL-0223

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

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