Low Voltage Release (LVR) protection used in...

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Question 1 of 205eccefa4bacbc34ba4d48360

Low Voltage Release (LVR) protection used in some shipboard motor starters and other control equipment will have which of the following characteristics?

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5eccefa4bacbc34ba4d48360

Low Voltage Release (LVR) protection used in some shipboard motor starters and other control equipment will have which of the following characteristics?

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🔍 Key Concepts

• Low Voltage Release (LVR) vs Low Voltage Protection (LVP) – know the difference in behavior when power comes back after a voltage drop or blackout • Behavior of motor starters and contactors when supply voltage drops below a safe level • Safety concerns with automatic restart of motors after power is restored on a ship

💭 Think About

• Ask yourself: with low voltage release, what happens to the contactor when voltage drops too low or is lost? Does it stay in or drop out? • When power returns after a blackout, would LVR normally let the motor start up again by itself, or would it force an operator to take action? • Which option best describes a safety feature to prevent unexpected restarting of machinery after a power failure?

✅ Before You Answer

• Identify which choice describes manual operator action vs automatic restart after voltage is restored • Eliminate any options that mainly describe over-speed protection or phase sequence/phase failure protection, since those are different functions • Check which answer aligns with the idea that loss of voltage causes the contactor to drop out, and consider what must happen before the motor can run again

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Question 1 of 205eccefa4bacbc34ba4d48360

Low Voltage Release (LVR) protection used in some shipboard motor starters and other control equipment will have which of the following characteristics?

Back

Question 1 of 20

5eccefa4bacbc34ba4d48360

Low Voltage Release (LVR) protection used in some shipboard motor starters and other control equipment will have which of the following characteristics?

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

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