When troubleshooting a magnetic controller,...

Question 1 / 205eccefa4bacbc34ba4d4850c

Question 1 of 205eccefa4bacbc34ba4d4850c

When troubleshooting a magnetic controller, it is found that the contacts are welded together. What is the most probable cause?

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Question 1 of 20

5eccefa4bacbc34ba4d4850c

When troubleshooting a magnetic controller, it is found that the contacts are welded together. What is the most probable cause?

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🔍 Key Concepts

• Magnetic controller operation – how the coil voltage affects the strength of the magnetic pull on the moving armature and contacts • Contact arcing and chatter – what operating condition causes contacts to open/close rapidly or not pull in firmly, leading to heat and welding • Difference between steady, firm contact pressure vs weak, intermittent contact

💭 Think About

• Think about which condition would cause the contacts to not be pulled tightly together, allowing arcing every time current flows. • Which option would make the magnetic field in the operating coil too weak, causing the armature and contacts to chatter instead of closing solidly? • Consider which choice would increase arcing and heating at the contacts over time, rather than just raising the general temperature of the device.

✅ Before You Answer

• Verify which option would lead to a weak magnetic field in the coil, rather than a stronger one. • Check which condition is most likely to cause contact chatter and heavy arcing, which in turn can weld contacts together. • Eliminate any choices that only affect overall temperature or mechanical wear but do not cause repeated arcing at the contact surfaces.

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Question 1 of 20

When troubleshooting a magnetic controller, it is found that the contacts are welded together. What is the most probable cause?

excessive operation at low load

high ambient temperature

high voltage on the operating coil

low voltage on the operating coil

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Question 1 / 205eccefa4bacbc34ba4d4850c

Question 1 of 205eccefa4bacbc34ba4d4850c

When troubleshooting a magnetic controller, it is found that the contacts are welded together. What is the most probable cause?

Back

Question 1 of 20

5eccefa4bacbc34ba4d4850c

When troubleshooting a magnetic controller, it is found that the contacts are welded together. What is the most probable cause?

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?

Quick actions

— No credit card needed