Question

What $kVA$ rating is required for a transformer that must handle a maximum load current of $8A$ with a secondary voltage of $2kV$?

• A. $4kVA$
  
• B. $0.25kVA$
  
• C. $16kVA$
  
• D. $8kVA$
  

Answer 1

The correct option is C $16kVA$

For a transformer, $\frac{V_s}{V_p}=\frac{N_s}{N_p}=\frac{I_p}{I_s}$ or $V_p{I}_p=V_s{I}_s$

Thus the required rating $=V_p{I}_p=V_s{I}_s=\left(2kV\right)\left(8A\right)=16kVA$