When troubleshooting AC motors, what can a...

Question 1 of 270705eccefa4bacbc34ba4d48537

When troubleshooting AC motors, what can a portable growler be used to locate?

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Question 1 of 27070

Q

When troubleshooting AC motors, what can a portable growler be used to locate?

🔍 Key Concepts

• AC motor construction – difference between stator coils and field coils in common marine AC motors • Growler function – what fault type it is designed to reveal in armatures and windings • Difference between short, open, and grounded windings

💭 Think About

• Think about what kind of defect would cause two adjacent turns in a winding to behave abnormally when exposed to a changing magnetic field from the growler. • Which of these faults (grounded, open, shorted) would a magnetic tool most easily detect by inducing current and checking for abnormal attraction or vibration? • In typical troubleshooting practice, which instrument is more commonly used for checking grounds and opens, and which for checking faults between turns?

✅ Before You Answer

• Be clear on the definitions: grounded coil vs open coil vs shorted turns. • Recall how a growler test is actually performed (using a hacksaw blade or thin steel strip) and what physical indication you look for. • Eliminate the options that describe faults better found with an ohmmeter or megger, not a growler.