As shown in the two-speed single winding...

Question 1 of 2707066636eed28f7522a1c51db98

As shown in the two-speed single winding three-phase motor connection diagrams illustrated in figure "B", what is the connection scheme associated with low-speed operation? Illustration EL-0118

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Question 1 of 27070

As shown in the two-speed single winding three-phase motor connection diagrams illustrated in figure "B", what is the connection scheme associated with low-speed operation? Illustration EL-0118

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🔍 Key Concepts

• Dahlander (two-speed, single-winding) motor connections (how low speed vs high speed are obtained) • How a wye (Y) connection looks vs a delta (Δ) connection in a three‑phase diagram • Difference between series and parallel connection of coil sections in the same phase

💭 Think About

• In figure B, focus only on the LOW‑speed condition: which terminals are connected to L1, L2, and L3, and which terminals (if any) are tied together but NOT brought out to the line? • Look at one phase leg (for example the winding that includes T1 and T4). Are the two coil sections in that leg drawn end‑to‑end (series) or side‑by‑side between the same two points (parallel)? • From the overall shape of the three legs together, does the connection form a closed triangle (delta) or three legs meeting at a common junction (wye)?

✅ Before You Answer

• Identify clearly whether the three phase windings form a triangle (Δ) or a Y with a common junction for LOW speed in figure B. • Decide if each phase consists of one long path through two coils in a row (series) or two paths in parallel between line and junction. • Match what you see in the LOW‑speed drawing to the wording of the choices: delta vs wye and series vs parallel.