🔍 Key Concepts

• Low-voltage protection (LVP) versus low-voltage release (LVR) in motor starters • What happens to a running motor if supply voltage drops or is lost • Safety concerns with motors automatically restarting after a power failure

💭 Think About

• Think about what should happen if power to a running motor is lost and then comes back unexpectedly—what is safer for personnel and equipment? • Which option describes a function that directly responds to loss or drop of voltage, rather than to over‑speed or short circuit? • Does low-voltage protection act during the low-voltage condition, or mainly at the moment of restoration of normal voltage?

✅ Before You Answer

• Identify which choices describe protection against overcurrent/short circuit rather than loss of voltage • Decide whether proper low-voltage protection should permit or prevent automatic restarting after a power failure • Make sure the option you choose focuses on the behavior when voltage is restored, not just when it becomes low