As shown in the tripping curves of the...

Study

Question 1 of 205eccefa4bacbc34ba4d482ca

As shown in the tripping curves of the illustration, what is the name of the value at which the OCR and fuse tripping curves cross? See illustration EL-0173.

Back

Question 1 of 20

5eccefa4bacbc34ba4d482ca

As shown in the tripping curves of the illustration, what is the name of the value at which the OCR and fuse tripping curves cross? See illustration EL-0173.

No comments yet

Be the first to share your thoughts!

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

🔍 Key Concepts

• Overcurrent relay (OCR) protection vs fuse protection on a time-current curve • Relationship between motor starting/locked-rotor current and full-load current (FLC) • Typical multiples of FLC for no‑load, full‑load, and locked‑rotor currents in induction motors

💭 Think About

• Look at the horizontal axis: what does current × FLC mean, and near what multiple do the OCR and fuse curves cross? • Which of the answer choices normally occurs at a current that is several times the motor’s full‑load current? • For normal operation, should the protection devices trip at no‑load or full‑load current, or only at a much higher abnormal current?

✅ Before You Answer

• Identify approximately what multiple of FLC is shown at the intersection of the OCR and fuse curves on the graph (e.g., 1×, 1.25×, 6×). • Recall the typical range (in multiples of FLC) for locked‑rotor current compared with full‑load and no‑load currents. • Make sure the chosen option represents a current level at which you would want both the fuse and OCR to trip quickly to protect the motor.

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

Quick actions

— No credit card needed

Study

Question 1 of 205eccefa4bacbc34ba4d482ca

As shown in the tripping curves of the illustration, what is the name of the value at which the OCR and fuse tripping curves cross? See illustration EL-0173.

Back

Question 1 of 20

5eccefa4bacbc34ba4d482ca

As shown in the tripping curves of the illustration, what is the name of the value at which the OCR and fuse tripping curves cross? See illustration EL-0173.

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