Electrician Red Seal · Question
For a dual-voltage, 9-lead, wye-connected, three-phase motor, which terminals are connected together for high-voltage operation?
For high voltage on a 9-lead wye motor, the windings are connected in series. This is achieved by connecting terminals (4-7), (5-8), and (6-9), and applying the
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Question: For a dual-voltage, 9-lead, wye-connected, three-phase motor, which terminals are connected together for high-voltage operation?
Answer options:
- (4,5,6) together, L1-1, L2-2, L3-3, (7-8-9) insulated ✅ (4-7), (5-8), (6-9) together, L1-1, L2-2, L3-3
- (1-7), (2-8), (3-9) together, L1-4, L2-5, L3-6
- L1-(1,7), L2-(2,8), L3-(3,9), (4,5,6) together
Correct answer: (4-7), (5-8), (6-9) together, L1-1, L2-2, L3-3
Explanation: For high voltage on a 9-lead wye motor, the windings are connected in series. This is achieved by connecting terminals (4-7), (5-8), and (6-9), and applying the line voltage to L1, L2, and L3.
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