- Method of cooling the windingsOil
Transformers OHMS power oil series
- single-phase dvukhobmotochny lowering. Are issued with power from 0,63 to 10 kVA, included in the alternating current main with a frequency of 50 Hz and are intended for food of consumers of electric energy in schemes of power supply of own needs of railway electric networks.
OHMS transformers are issued on the rated voltage of primary winding of 6 or 10 kV. The rated voltage of a secondary winding is 0,23 kV. Scheme and group of connection of windings 1/1-0.
Transformers are intended for installation on separate transmission towers and stationary installation with cases of block and complete devices, and also can be used for food of other single-phase consumers and be established according to the project.
Switching of adjusting branches is carried out by means of a crossing point of the active part established on the screen from NN.
For control of completeness of filling of a tank with oil OHMS transformers are supplied with the float-operated oil indicator located on a cover.
OHMS transformers are delivered with the penetrative safety lock established from NN with penetrative voltage up to 1600 V.
Technical characteristics of OHMS transformers
| Power, kVA | Scheme and group of the VN connection | Un, kV | Rk, W | Rkhkh, W | Uk, % | Ixx, % |
| 0,63 | 1/1-0 | 6, 10 | 30 | 20 | 4.5 | 30 |
| 1,25 | 1/1-0 | 6, 10 | 65 | 30 | 4.5 | 30 |
| 2,5 | 1/1-0 | 6, 10 | 110 | 52 | 4.5 | 18 |
| 4 | 1/1-0 | 6, 10 | 160 | 52 | 3.8 | 14 |
| 6 | 1/1-0 | 6, 10 | 210 | 60 | 3.5 | 10 |
| 10 | 1/1-0 | 6, 10 | 290 | 85 | 3.5 | 5 |
Overall and OHMS connecting dimensions 0,63... 10 kVA
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| Transformer type | Sizes, mm | Weight, kg | ||||||
| L | H | H1 | B | B1 | K | M | ||
| OM-0,63/10 U1 | 400 | 630 | 390 | 320 | 260 | 300 | 230 | 65 |
| OM-1,25/10 U1 | 400 | 630 | 390 | 320 | 260 | 300 | 239 | 69 |
| OM-2,5/10 U1 | 400 | 655 | 415 | 360 | 300 | 300 | 270 | 78,5 |
| OM-4/10 U1 | 475 | 710 | 470 | 380 | 325 | 350 | 270 | 102 |
| OM-6/10 U1 | 475 | 710 | 470 | 380 | 325 | 350 | 270 | 110 |
| OM-10/10 U1 | 475 | 760 | 520 | 380 | 325 | 350 | 270 | 126 |
