Electrician Red Seal · Question
A 100 kVA, 600V to 120/208V, three-phase, delta-wye transformer is installed. What is the full load current on the secondary side?
For a three-phase system, the formula for current is I = VA / (V * √3). On the secondary side: I = 100,000 VA / (208 V * 1.732) ≈ 277.8 A. Using the √3 is cruci
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Question: A 100 kVA, 600V to 120/208V, three-phase, delta-wye transformer is installed. What is the full load current on the secondary side?
Answer options: ✅ 277.8 A
- 96.2 A
- 481.1 A
- 166.7 A
Correct answer: 277.8 A
Explanation: For a three-phase system, the formula for current is I = VA / (V * √3). On the secondary side: I = 100,000 VA / (208 V * 1.732) ≈ 277.8 A. Using the √3 is crucial for three-phase calculations.
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