Transformer Temperature Rise Test | Heat Run Test on Three Phase Transformer | Raytech Meter скачать в хорошем качестве

Transformer Temperature Rise Test | Heat Run Test on Three Phase Transformer | Raytech Meter

#TransformerTemperatureRiseTest #HeatRunTest #RaytechResistanceMeter Topic: Transformer Temperature Rise Test : Heat Run Test on Three Phase Transformer : Raytech Meter Reference Clause from IEC-60076-2 7.2.1 Ambient temperature 1- For the temperature rise test, the cooling air temperature should be in the range between 10 °C and the maximum ambient temperature for which the transformer is designed. 2- At least four sensors shall be provided and the average of their readings shall be used to determine the ambient temperature for the evaluation of the test results. 3-Readings should be taken at regular intervals (e.g. every ten minutes), or automatic Continuous recording may be used. 4-Around an ONAN transformer, the ambient sensors shall be placed at a level about halfway Up the cooling surfaces. 5-The sensors shall be distributed around the tank, about 2 m away from the perimeter of the tank And cooling surfaces, and protected from direct heat radiation. 6-Attention shall be paid to possible recirculation of hot air. The transformer should be placed So as to minimize obstructions to the airflow and to provide stable ambient conditions. 7.3.2 Test short-circuit method for two winding transformers During this test, the transformer is not subjected to rated voltage and rated current simultaneously, but to the calculated total losses, previously obtained From two separate determinations of losses, namely load loss at the reference temperature and no-load loss (see IEC 60076-1).