What would be the most likely fault if a...

🔍 Key Concepts

• Permanent split capacitor (PSC) motor construction – which components it does and does NOT have (start winding, run winding, capacitor, centrifugal switch) • Role of the capacitor in starting torque for single-phase induction motors • How centrifugal switches are used in other types of single-phase motors (e.g., capacitor-start)

💭 Think About

• First, recall whether a permanent split capacitor motor uses a centrifugal switch at all; compare it to a capacitor-start motor design • Think about which component, if failed open, would most directly prevent the creation of starting torque in a PSC motor while still allowing normal line voltage to be present • Ask yourself: which of these listed faults is not actually consistent with the normal design of a PSC motor?

✅ Before You Answer

• Verify from your notes: Does a permanent split capacitor motor include a centrifugal switch? • Confirm which winding(s) are present in a PSC motor and whether the auxiliary (or start) winding is intended to remain in the circuit continuously • Identify which answer choices describe parts that are not normally used in a permanent split capacitor motor design

What would be the most likely fault if a single-phase permanent split capacitor induction motor fails to start?

an open start winding

an open start capacitor

a closed centrifugal switch

an open centrifugal switch

🔍 Key Concepts

💭 Think About

✅ Before You Answer