When one transformer is removed from a delta-delta bank of a 30 kVA transformer, the capacity of the resulting 3-phase transformer in V-V connection will be
- A. 11.5 kVA
- B. 17.3 kVA
- C. 20 kVA
- D. 25.9 kVA
Answer: B. 17.3 kVA
Explanation: In open-delta (V-V) configuration with one transformer removed, capacity is 1/√3 (57.7%) of original delta bank: 30 × 0.577 = 17.32 kVA.