As shown in figure "C" of the illustration,...

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Question 1 of 205eccefa4bacbc34ba4d48138

As shown in figure "C" of the illustration, with a digital multimeter set up as an ohmmeter, what set of readings would be consistent with an open in a phase of the single circuit, delta-connected stator windings separated out as shown? See illustration EL-0201.

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🔍 Key Concepts

• Delta-connected stator windings and how each phase is formed between two numbered leads in figure C • What an open circuit looks like on an ohmmeter (OL vs a finite resistance) • How current can or cannot find an alternate path around the delta when one phase is open

💭 Think About

• From the figure, map which numbered terminals belong to each phase winding (A, B, C). Which pair (1-4, 2-5, 3-6) is directly across the open phase? • If one phase is open, will the meter between its two terminals see any series or parallel path through the other two good phases, or will it see a complete open? Sketch the current paths. • For the two good phases, should their measured resistance be the same or different, and should it be equal to one winding, or two windings in series around the delta?

✅ Before You Answer

• Identify exactly where the open is located in phase A on figure C and which test pair is across it. • Confirm that the two healthy phases give equal resistance readings and that these values are realistic (not OL, not double-counting paths that can’t actually conduct). • Verify that any option showing different values for the two good phases, or showing a finite reading where no complete path exists, cannot represent a single open in only one phase.

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