In order to ensure the safe and reliable operation of transformers, such as dual voltage transformer, 35kv transformer, 35kv distribution transformer, necessary inspections and tests should be carried out before operation, strict monitoring and regular maintenance should be carried out during operation, and the transformer should be discovered in time when there is any abnormality, Timely treatment.
Newly installed and overhauled transformer, before operation should pay special attention to check the oil level of the oil storage cabinet is normal, moisture absorber desiccant has no moisture, safety airway is intact, tap changer position is normal, whether the cooling device is complete, whether the control circuit is good, whether the grounding device is intact, etc.; in the test project, pay special attention to the measurement of insulation resistance, absorption ratio and determination of the connecting group; in the operation of the monitor Pay special attention to each physical quantity of the transformer, which should be within the rated range.
Transformer abnormal heating, oil temperature rise, power side current increase, three-phase winding DC resistance is obviously unbalanced, high-voltage fuse blown, gas relay action and other fault phenomena is due to the winding insulation aging moisture, damage, oil blockage, local overheating caused by this kind of problem, we only need to repair or replace the damaged windings, liner and insulating cylinder, paint dipping and drying treatment, clear the oil channel of the sundries can be.
But if the high-voltage fuse fuse, safety airway valve cover open, transformer oil burning is possible because of the winding insulation aging, broken, transformer oil is seriously damp, the oil level in the box is too low, exposed to the oil surface of the lead insulation distance is insufficient and breakdown (over-voltage caused by the winding insulation breakdown.). At this time you need to repair or replace the winding, replace or treat the transformer oil, overhaul the oil leakage parts, and fill the oil to the normal oil level.