Blogs-Hebei Zhongbei Transformer Co., Ltd

What cooling type ONAN vs ONAF for oil immersed transformer?

ONAN and ONAF are the two most widespread natural/forced air cooling classifications defined by IEC 60076-2,widely used for corrugated tank and radiator-type oil immersed distribution transformers.Code breakdown: O=Oil ci...

How often to replace transformer oil for oil immersed transformer?

The replacement cycle of transformer insulating oil depends on operating environment, load condition, regular oil test results and equipment application scenario; fixed time replacement is not the only standard, combining...

How to maintain oil immersed transformer to extend service life?

Scientific regular maintenance can effectively slow down insulation aging, metal corrosion and oil deterioration, greatly prolong the overall service life of oil immersed transformers, especially critical for units runnin...

What are common faults of corrugated tank oil immersed transformer?

Corrugated tank transformers cancel external independent radiators and adopt integrated corrugated steel sheet for heat dissipation. Their typical failures concentrate on corrugated panel damage, sealing defects, insulati...

How to troubleshoot insulation drop of oil immersed transformer?

Insulation resistance decline is a frequent hidden defect of oil immersed transformers, easily triggering insulation breakdown and short-circuit fault. Systematic troubleshooting follows inspection sequence: on-site preli...

Why oil immersed transformer abnormal overheating during operation?

Abnormal overheating is a common operational fault of oil-immersed transformers, which accelerates insulation aging, deteriorates transformer oil and may trigger equipment shutdown in severe cases. The main inducing facto...