



What is the purpose of neutral point in a star connection? How does the absence of a neutral point affect a star connected circuit?
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- How do you identify a delta connection in a circuit diagram? Draw a simple star connected resistive circuit.
- How does star-delta starting reduce the starting current of an induction motor?
- What is the formula for transforming delta to star resistances?
- Solve for the equivalent star impedance of a given delta impedance network.
- What happens if the motor starts directly in the delta connection? Compare direct-on-line starting with star-delta starting.
- How are star and delta connections different? What are the advantages of a star connection?
- Derive the star to delta transformation formulas using circuit analysis principles. Explain the conditions under which the transformation between star and delta is unique.
- If yes, how would you handle the transformation of impedances at different frequencies?
- What are the formulas for power calculation in a balanced delta connected load?
- If yes, how are the transformation formulas modified for impedances?
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