Oil Immersed Distribution Transformer For European

The oil immersed distribution transformer are built in accordance with IEC 60076 standards.For European market ,the calculation is made according to Ecodesign regulation, norms EN 50588-1.The distribution transformer core is built up of cold rolled oriented grain steel sheet with low specific losses, insulated on both sides by a thin inorganic coating. The single sheets composing the core are cut at 45°. Uniform pressing, stiffness and solidity of the columns assure a low noise level. the transformers are filled with mineral oil, according to IEC standards. The oil is previously treated and dried. Upon demand, filling can be made by using insulating silicon oil or vegetable and biodegradable.

Farady oil immersed transformer for industrial

Distribution transformer(oil immersed transformer) for industrial and mining enterprises and civil building one of the important equipment in power supply and distribution system, it will be 10 (6) kV or 35 kV voltage drop to network users use 230/400 v bus voltage. Such products applied to ac 50 Hz (60), maximum rated capacity of 2500 kva three-phase (single phase maximum rated capacity of 833 kva, single phase transformer is generally not recommended), can be used in indoor (outside), when capacity of 315 kva and below can be installed on the pole, environment temperature is not higher than 40 ℃, no less than 25 ℃, the highest daily average temperature 30 ℃, the highest annual average temperature is 20 ℃, relative humidity less than 90% (environment temperature 25 ℃), the altitude does not exceed 1000 m. If the above conditions are not in conformity with the above conditions, the relevant provisions of gb650-86 shall be adjusted accordingly.

Core form and shell form transformers

Closed-core transformers are constructed in 'core form' or 'shell form'. When windings surround the core, the transformer is core form; when windings are surrounded by the core, the transformer is shell form. Shell form design may be more prevalent than core form design for farady distribution transformer applications due to the relative ease in stacking the core around winding coils.Core form design tends to, as a general rule, be more economical, and therefore more prevalent, than shell form design for farady high voltage auto load booster power transformer applications at the lower end of their voltage and power rating ranges (less than or equal to, nominally, 230 kV or 75 MVA). At higher voltage and power ratings, shell form transformers tend to be more prevalent. Shell form design tends to be preferred for extra-high voltage and higher MVA applications because, though more labor-intensive to manufacture, shell form transformers are characterized as having inherently better kVA-to-weight ratio, better short-circuit strength characteristics and higher immunity to transit damage