| Sr. No. |
Description |
Particulars |
| 1. |
Rated KVA |
630 KVA |
| 2. |
Service & Duty |
Continuous , Step Down Distribution Transformer |
| 3. |
Type |
Oil Cooled |
| 4. |
Location |
Outdoor |
| 5. |
Type Of Cooling |
ONAN |
| 6. |
Wound |
Copper Double Wound |
| 7. |
Nominal Voltage (V) |
11000 |
| 8. |
Highest System Voltage (V) |
12000 |
| 9. |
No. Of Phases |
3 |
| 10. |
Frequency (Hz) |
50 |
| 11. |
Voltage Variation |
± 10 % |
| 12. |
Frequency Variation |
± 3 % |
| 13. |
Combined Voltage & Frequency Variation |
± 10 % |
| 14. |
Termination (H. V. / L. V.) |
Bushing / Cable Box |
| 15. |
Orientation Of H. V. & L. V. |
180 Degree |
| 16. |
Rated Voltage Of H.V. (Volts) |
11000 |
| 17. |
Rated Voltage Of L.V. (Volts) |
433 |
| 18. |
Rated Current Of H. V. (Amps) |
33.06 |
| 19. |
Rated Current Of L. V. (Amps) |
840.04 |
| 20. |
Temperature Rise (In Oil) |
40 °C |
| 21. |
Temperature Rise (In Winding) |
45 °C |
| 22. |
Connections (H. V. / L. V.) |
Delta / Star |
| 23. |
Neutral Brought Out For Earthling |
Yes Solidly Earthed |
| 24. |
Vector Group |
Dyn 11 |
| 25. |
Tapings On H. V. Winding For H. V. Variation |
(A) No. Of Positions : 5 Positions
(B) Range : + 5 To – 5 % In Steps Of 2.50 % By O. C. T. C. |
| 26. |
Losses At 50 % Load (Watts) |
1860 W |
| 27. |
Losses At 100 % Load (Watts) |
5300 W |
| 28. |
% Impedance At 75 °C At Normal Tap |
4.50 % (Sub To IS Tol.) |
| 29. |
No Load Current Approx. |
Less Than 1 % Of Full Load Current |
| 30. |
Regulation At Full Load At 75 °C & U. P. F. |
0.92 % |
| 31. |
Maximum Efficiency (%) |
99.15 |
| 32. |
Load At Which Maximum Efficiency Occurs (KVA) |
50.14 % |
| 33. |
Materials |
(A) Conductor : E. C. Grade D. P. C. Copper Wire & Strips
(B) Lamination : CRGO (M – 3 / M – 4 Grade)
(C) Insulation : Class A
(D) Oil : Power Oil (IS : 335 / 1993) |
| 34. |
Weights |
(A) Core & Winding : 1460 KG Approximate
(B) Oil : 650 Liter Approximate
(C) Total Weight Of Transformer : 2700 KG Approximate |
| 35. |
Dimentions |
(A) Length : 1575 mm Approximate
(B) Width : 1475 mm Approximate
(C) Height : 2025 mm Approximate |
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