Which of the following methods should be...

Question 1 / 205eccefa4bacbc34ba4d48535

Question 1 of 205eccefa4bacbc34ba4d48535

Which of the following methods should be used to test for an 'open' stator winding coil in a wye-connected AC squirrel cage induction motor?

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Question 1 of 20

5eccefa4bacbc34ba4d48535

Which of the following methods should be used to test for an 'open' stator winding coil in a wye-connected AC squirrel cage induction motor?

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🔍 Key Concepts

• Stator winding tests with an ohmmeter on a wye-connected (star-connected) motor • Difference between checking for a grounded winding (short to the frame/shaft) vs checking for an open coil (break in the circuit) • Purpose and normal use of a growler when testing motor windings

💭 Think About

• Ask yourself: When a coil is open, are you trying to detect continuity between two winding leads, or between a winding and the motor frame/shaft? • Think about what readings you would expect from an ohmmeter when comparing the three phase windings of a healthy wye-connected motor vs one with an open coil. • Consider what a growler is mainly used to detect: does it better reveal shorted turns or broken (open) turns, and how would the sound or vibration typically change?

✅ Before You Answer

• Verify which test method actually compares the resistance between the three phase windings to find an imbalance. • Confirm whether placing a meter lead on the shaft/frame is aimed at finding a ground fault rather than an open circuit in a coil. • Recall that a growler is primarily used to find shorted turns, and think about whether the question is asking about shorts or opens.

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Question 1 of 20

Which of the following methods should be used to test for an 'open' stator winding coil in a wye-connected AC squirrel cage induction motor?

Test with an ohmmeter, with one test lead on the shaft, and the other test lead to each of the disconnected motor leads in succession and compare the resistances

Test with an ohmmeter with the test leads across each pair disconnected motor lead leads in succession and compare resistances.

Use a growler, listening for noise and vibration to diminish when over an open coil.

Use a growler, listening for noise and vibration to increase when over an open coil.

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Question 1 / 205eccefa4bacbc34ba4d48535

Question 1 of 205eccefa4bacbc34ba4d48535

Which of the following methods should be used to test for an 'open' stator winding coil in a wye-connected AC squirrel cage induction motor?

Back

Question 1 of 20

5eccefa4bacbc34ba4d48535

Which of the following methods should be used to test for an 'open' stator winding coil in a wye-connected AC squirrel cage induction motor?

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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