A generator has reactances of sub transient (X")= 0.5 pu, transient (X') = 0.8 pu and synchronous reactance (X) = 5 pu. The voltages at these reactances are 1.2 V, 1.1 V and 1 V respectively. Find the corresponding sub transient fault current in pu?

• A.  3.975 pu
• B.  2.4 pu
• C.  0.2 pu
• D.  1.375 pu

Answer: (B)