Power Transformer

Product Specifications

Markets:	North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe

Product Description

China Shenyang Xinxin Alliance Electric Co., Ltd is specialized in supplying various of power transformer and parts, materials for Power Transformer and Distribution Transformer, Instrument Transformer and Switchgear, GIS, Surge arrester, Fuse cutout and so on.
Products supply range:


Core Material Core Assembly (for Power and Distribution Transformer)Alu. Foil for Distribution TransformerCTC Wire, Round wire etc. For all product rangeComplete Bushing Transformer TANK
Cooling System ( Radiator)External Cooling System (Fan etc. )Accessories (Pressure Relief Device, Gate Valve, Thermometer, wheels etc. )Of Load Tap Changer on load tap changer550KV Power Transformer
Brief Introduction to Products
1. Structure characteristics of 500kV power transformer
Winding
The interleaved structure or shielding inserted structure is adopted in The winding of 500kV and above transformer. Transposed and multiple Conductor is used to improve the impulse voltage distribution and reduce The additional losses of winding effectively. The electrical field and Impulse characteristic of winding are calculated by computer program to uarantee the excellent electrical characteristics and impulse strength Of winding. The winding for large transformer is wounded by vertical
Winding machine to achieve a tight and reliable winding. The edges of Rib and spacer in winding have been rounded to improve the dielectric Strength.

Core
The core is made of imported high quality cold-rolled grain-oriented Silicon steel. The core adopted full-bevel joint structure of 45° With Silicon steel out of punching hole to reduce the no-load losses of Transformer. All silicon steels are cut by advanced cutting machine Imported from George Company with the height of burrs less than 0.02mm.
The limb and side limb are fastened by polyester fiberglass glued band Without woof. The top and bottom yokes are tightened by the fiberglass Glued band through the tightening frame assembled on the clamp. For the Large transformer, the top & bottom yokes are connected with core firmly By the non-magnetic steel flitch plate at both sides of core limb to Form a rigid steel frame for enhancing the mechanical stability of core, So as to improve the short-circuit withstand ability of transformer.

Active part insulation
After the drying treatment of the active part in 400kW large kerosene Vapor phase drying oven imported from Switzerland, the water content of Insulation parts can decrease to less than 0.5%. The insulation parts And active part assembly are carried out in the dust-proof room with Air-conditioners to guarantee the PD value of transformer fulfilling the Requirement in IEC standard. The rounded treatment shall be done for Winding exit and welded area of leads. The insulation pressing plate is Used to press the active part. The whole set winding assembly Processing, i. e. Assemble whole set of windings on the core at the same Time was improved to enhance the product reliability as well as shorten The processing duration for ensuring the product quality.

Tank
Normally, the tank is designed as bell type. The steel plates for tank Wall are bent to the corrugated shape by imported large bending machine, Or the tank walls are welded with bent stiffeners to enhance tank's Mechanical strength and decrease the number of welding seams so as to Perfect the appearance of transformer. In order to decrease the stray Losses of transformer, the magnetic shielding or combined Copper-magnetic shielding is placed on the inner surface of tank wall For extra-large transformer. Currently, some of tank for extra-large Transformers are made of non-magnetic steel plates. The tank frame can Be sealed either by bolts or welded together with upper and lower parts Tank.