| Rated power | | | | ..……KVA | | 250 | | |
| Type of transformer | | | | – | Oil immersed ( Hermetically sealed ) |
| Standard | | | | | – | | IEC 76 | | |
| Cooling System | | | | – | | ONAN | | |
| No. Of phase | | | | – | | 3 | | |
| Frequency | | | | | ……….Hz | | 50 | | |
| Rate of voltage : Primary | | | | ……….V. | | 33000 | | |
| : Secondary | | | ..………V. | | 400/230 | | |
| Vector group | | | | – | | Dyn 11 | | |
| Tapping | Type | | | | – | Off circuit tap changer |
| No. of steps | | | | – | | 5 | | |
| Percentage of tapping | | | – | | | | |
| Impedance voltage at 75 C | | | | ………..% | | 4 | | |
| NO – Load current | | | | …..…..% | | 1 | | |
| Ambient temperature | | | | …..…….C | | 40 | | |
| Average Temperature rise of winding | | | …..…….C | | 65 | | |
| Average Temperature rise of top oil | | | …………C | | 60 | | |
| Noise level not more than | | | | ….……dB | | 56 | | |
| No – Load loss | | | | ……..Watt | | 500 | | |
| Load loss at 75 C | | | | ……..Watt | | 2950 | | |
| | : 25 % of rate power | | …….….% | | 98.94 | | |
| Efficiency | | : 50 % of rate power | | …………% | | 98.08 | | |
| at P.F. = 1 | | : 75 % of rate power | | ………..% | | 98.79 | | |
| | : 100 % of rate power | | …..……% | | 98.56 | | |
| Voltage regulation | : at P.F. = 0.8 | | …….….% | | 3.22 | | |
| | : at P.F. = 0.9 | | …….….% | | 2.71 | | |
| | : at P.F. = 1. | | ….…….% | | 1.17 | | |
| Impulse Withstand | : Primary winding | | ..…….KV. | | 125 | | |
| Voltage | | : Secondary winding | | ………KV. | | – | | |
| Power Frequency | : Primary winding | | ….…..KV. | | 50 | | |
| | : Secondary winding | | ………KV. | | 3 | | |
| Terminal arrangement H.V. Side | | | | | Cable | | |
| | L.V. Side | | | | | Cable | | |
| Installation on | | | | | Pole mounted / Plantform |
