-
A 300 kVA, 3300/400 V, three-phase transformer has its primary and secondary windings connected in delta for a dummy load test, for circulating full-load current, the magnitude of the injected voltage in open delta of HV windings is 360 V. The leakage impedance in per -unit system is _______
-
- 364
- 0.0064
- 64
- 0.0364
Correct Option: D
Voltage across each phase of h.v. winding
| = | = 120 V = VSC | |
| 3 |
VPh = 3300 V ;
| IPh = | = | = 30.3 amp. | ||
| 3 × 3300 | 3.3 |
| ZeH = | = | = 3.96 Ω | ||
| ISC | 30.3 |
| Zbase = | = | = 108.9 Ω | ||
| Ibase | 30.3 |
| ∴ ZeH (p.u.) = | = 0.0364 p.u. | |
| 108.9 |
