🔍 Key Concepts

• Split-phase induction motor operation – role of main (running) winding vs. auxiliary (starting) winding • Centrifugal switch/relay function – when and why it opens as speed increases • Heating in windings when a winding designed for short-time duty is left energized continuously

💭 Think About

• Think about what the starting winding is designed for: continuous duty or only short-time use during starting? How does that affect what might happen if it stays in the circuit? • If the starting winding stays energized at normal running speed and load, which of the listed effects (overspeed, higher torque, immediate stall, or damage) is most realistic? • Compare normal current and resistance of the starting winding vs. main winding. What does that imply about temperature rise over time if it never disconnects?

✅ Before You Answer

• Check how a centrifugal switch/starting relay normally behaves: it should open at a certain percentage of synchronous speed. • Verify which motor component (main or starting winding) is only rated for intermittent (starting) duty and what happens if it draws current continuously. • Eliminate options that would occur immediately vs. those that would occur gradually as a result of overheating.