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ELMO-NF
NF series transformers oil heating and filtration plants
The Plants are designed for heating and filtration the transformer oil which are used in the oil-filled electrical equipment (for example, power transformers) up to 1150 kV. Using of the Plants most effective for heating the active part and removal the material of aging the solid insulation of power transformers with using the sprinklers of transformer oil (by the "oil-spray" method).
| Parameter | NF-40/10 | NF-80/20 | NF-160/40 |
| Capacity in heating and filtration mode of transformer oil, m3/h, not less than | 10 | 20 | 40 |
| Capacity in heating mode of transformer oil, m3/h, not less than | 20 | 40 | 60 |
| Cutoff rating, micron | 5 | ||
| Decontamination factor Dx (on ISO 4572) | ≥30 | ||
| *Mass contents of mechanical impurities in transformer oil at output after one operation cycle, gramm/ton, not more than | 5 | ||
| **The service cycle of unified filterpacks with content of mechanical impurities in transformer oil at Plant’s input up to 50 gramm/ton, m3, not less than | 150 | 300 | 600 |
| Rated working pressure, kgf/cm2 | -1-0-6 | ||
| Output pressure in heating and filtration mode, kgf/cm2, not less than | 3.0 | ||
| Maximum oil temperature at output, oС | 96 | ||
| Installed power, kW | 44 | 87.5 | 171 |
| Oil heater power, kW | 40 | 80 | 160 |
| Supply voltage | 3 х 380 V, 50 Hz | ||
| Overall dimensions, mm: length - width - height | 1200х900х 1500 | 1450х1000х1500 | 1550х1000х1600 |
| Weight, kg | 300 | 600 | 850 |
* Cleanness class of transformer oil at Plant outlet as per ISO 4406 – not less than 13/10.
** The service cycle of unified filterpack if transformer oil has on input the grade of liquid purity of transformer oil as per ISO 4406 18/15, not less than 600 m3 (for NF-160/40)