When troubleshooting a motor controller, all...

Study

Question 1 of 205eccefa4bacbc34ba4d48515

When troubleshooting a motor controller, all indications are that a relay coil should be energized. If there was no magnetic pull, with rated voltage measured across the coil, what would be the most probable cause?

Back

Question 1 of 20

5eccefa4bacbc34ba4d48515

No comments yet

Be the first to share your thoughts!

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

🔍 Key Concepts

• Relay coil operation when rated voltage is applied • What an open coil vs. a stuck armature would look like when measuring voltage • How series control components (fuses, auxiliary contacts) affect voltage readings at the coil

💭 Think About

• If you truly measure rated voltage across the coil terminals, what does that tell you about everything connected in series with the coil? • Would a stuck armature prevent magnetic pull even if the coil is good and has voltage? Think about what physically creates magnetic pull. • In which fault condition would you still see full rated voltage at the coil, but no current flowing and therefore no magnetism?

✅ Before You Answer

• Verify where the voltage is being measured: directly across the coil terminals, not just in the control circuit. • Confirm that if a fuse or series contact were open, would you still be able to read rated voltage directly across the coil? • Consider which fault would allow voltage to appear at the coil but block current flow through the coil windings, eliminating magnetic pull.

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

Quick actions

— No credit card needed