A transformer has 2000V, 500 turns on the primary and 50 turns on the secondary. What would be the line voltage if the transformer were Delta/Star connected?
- 200V.
- 450V.
- 346V.
Explanation
The per-phase turns ratio steps 2000 V down to 2000 x (50/500) = 200 V on each secondary phase. With the secondary star-connected, the line voltage is the square root of three times the phase voltage: 1.732 x 200 is about 346 V. The 200 V answer is the phase voltage, not the line voltage.
Thomas2 asking:
A transformer has 2000V , 500 turns on the primary and 50 turns on the secondary . what would be the line voltage if the transformer were delta/star connected?
Community Comments (1)
S
squareroot Posts: 8 18.05.2016 / 19:18
voltage at secondary= 200v
line voltage = sq.root 3 x 200
= 346
line voltage = sq.root 3 x 200
= 346
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