In a Dd1 transformer ,___________________ a. LV leads HV with 330 degree b. HV lags LV with 30d egree c. LV leads HV with 30 degree d. LV lags HV with 330 degree

Ql-phase step down transformer 1250 KVA, 10002200 V, 50 Hz The resistance /phase and leakage reactanceiphase of the primary winding are 0.78 2 and 4.82 and the corresponding values for the secondary winding are 0.012 and 0.002 respectively if the primary winding is connected in delta and secondary in star calculate: )The voltage to be applied at normal frequency to the primary to circulate full-load through it when the secondary is short-circuited li) The full load copper loss

6. For the air core transformer circuit shown below, determine the currents la and lb in the direction shown. Express each answer in polar form. R1-302 www la ZI1=150 E=10/0 M=j20 Ze= n Z12=j62 lb R2=50 la Ib

You have a large single phase transformer with 7 tap settings (@ 0,+2,+4,+6% and -2,-4, and -6%) that lets you adjust the load voltage if necessary. The primary voltage is 4800V and the secondary voltage desired is 240V. Draw this arrangement with the 0% tap setting selected.