Question

A single phase transformer of rating 200 WkV, 8000/480 V has an equivalent leakage reactance referred to secondary equal to 0.014 ohm. It is connected in parallel with another single phase transformer of rating 350 kVA, 8000/440.V having equivalent leakage reactance referred to secondary equal to 0.026 ohm. The value of circulating current in the secondary windings of the parallel connected transformers at no-load, when rated voltage.is applied at primary is

• A. 500 A
• B. 750 A
• C. 1000 A
• D. 1250 A

Answer 1

The correct option is C 1000 A


$\text{Circulating current,}$

$I_{cu}=\frac{480-440}{0.014+0.026}=1000A$