🔍 Key Concepts
• Compare how motor leads T1–T6 are connected in figure A versus the terminal diagrams in B, C, and D.
• Note which motor leads are energized at low and high speed, and whether any leads are tied together externally.
• Relate the lead-tying patterns to the descriptions constant torque, variable torque, and constant horsepower given under figures B, C, and D.
💭 Think About
• In figure A, for the slow (S) and fast (F) contactors, which leads (T1–T6) actually receive L1, L2, and L3 in each speed condition?
• Looking at figures B, C, and D, which motor type(s) show the same leads on L1–L3 for low speed and a different set of leads on L1–L3 for high speed, matching what you see in A?
• Do any of the figures B, C, or D require external jumpers or ties between certain leads that you do not see represented in figure A’s controller diagram?
✅ Before You Answer
• Be sure you match low vs. high speed correctly between the control diagram (A) and the winding diagrams (B–D).
• Verify whether figure A shows any external ties (jumpers) between T1–T6; if not, consider what that means when comparing to the tables under B, C, and D.
• Confirm which information is missing from figure A that would prevent you from distinguishing between two torque characteristics, and which characteristic (if any) is clearly ruled out.