Cause of Leakage of Transformer

Leakage caused by two main reasons: one is in the transformer design and manufacturing process latent down; the other is due to the improper installation and maintenance of the pad-mounted transformers caused. Transformer main leakage parts often appear in the radiator interface, flat disc valve cap, casing, porcelain, weld, trachoma, flanges and other parts.
1, out of the air
Out of the air is an invisible form of leakage. For example, the casing head, the oil storage cabinet diaphragm, the airway glass, weld trachoma and steel sand and other parts of the air out of sight are invisible. Over the years, the main power system accidents are mostly winding winding accidents and low-voltage transformer outlet short-circuit the body of the serious damage.
2, the classification of oil leakage
Transformer oil leakage can be divided into two kinds of leakage and leakage, and leakage can be divided into weld seepage and sealing surface leakage of two.
1) Endoleak: The most common internal leakage is the oil in the oil-filled casing and the on-load tap-changer oil in the diverter switch housing leaks into the transformer body.
2) leakage: Leakage is divided into weld seepage and sealing surface leakage of two:
Weld seepage: weld seepage is caused by the existence of trachoma in the welded parts of the steel plate.
Sealing surface leakage: sealing surface leakage is more complex, to specific issues specific analysis. In the single phase step down transformer overhaul or installation process should prevent the sealing surface leakage as an important task.