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Dry-type Transformer ZQSC Type Traction Rectifier Transformers

Dry-type Transformer ZQSC Type Traction Rectifier Transformers

Country/Region china


Categories Dry Type Transformer

Update 2011-03-07 10:03:09

ICP License Issued by the Chinese Ministry

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Dry-type Transformer ZQSC Type Traction Rectifier Transformers

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Product Introduction

With the constant growth of the city scale; the problems of common traffic jam and automobile pollution have already received the recognition and concern all over the world. Thereby city subway traffic gets wider application and development for its big capacity, safe, quick and good environmental effect. Aiming at this international and domestic market and timely grasping the opportunity, Nanjing Daqo Transformer Systems Co., Ltd. successfully developed and manufactured the 1000kVA / 10kV epoxy resin casting 24 pulse wave dry-type traction rectifier transformer in 2006, the inner ring of LV winding and external ring of HV winding of each phase and each pole of the transformer is cut into two sections forming axial split 4-winding structure, wherein, the interconnection of all upper or lower parts of winding of three-phase inner ring LV winding is "" connection method, interconnection method of all other windings is "Y" connection; both the upper and lower parts LV winding of the outer ring are extension triangle connection. Because the transformer of the utility model adopts the axial split 4-winding structure, phase shift angle of the transformer is ±7.5°, corresponding to combining the two LV phase shift phase 30°angle of shift rectifier transformers into one, thus it both reduces the land occupying area of the project, and the installation is more convenient, the running is more reliable, and the cost is even lower.
Standards referred to:GB6450, GB / T10228-1997, GB / T18494.1 -2001, JB /T 8636-19 97

Functional Features
Technical Parameter
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1. Optimization of the power grid
In order to further improve the homemade and technical level of the urban railway traffic equipment, we adopt special winding design, reducing the rectifier harmonic wage, improving the quality of the power grid; greatly reduce the influence of the higher-order wave to the power grid and communication. 24- pulse wave rectifier transformer finishes the trial-production of the sample machine and confirmation of analog locomotive load test, the technical level has reached up to the domestic advanced level.
2. Beautiful appearance
Adopting imported Grade H epoxy resin to cast in the vacuum state (1-3mbar), thin insulation structure with packing. The winding surface is bright, smooth and beautiful; there is no need for carrying out any surface treatment, the product is elegant and tasty.
3. Excellent electric performance and outstanding overload capability
Externally encapsulated resin is imported Grade H epoxy resin, with excellent electric performance; and adopts special winding structure to ensure that the resin is completely saturated into each corner of the coil to eliminate the clearances and ensure that the local discharge of each product at factory is less than 5 PC and heat conduction of the resin with stuffing is good. For transformers of large capacity, adopt the design scheme of axial heat radiation duct. The transformer can be running at 120-130% of load within long period , and can be running at 150% rated load under forced air cooling.
4. High mechanical strength and good capability of resisting short circuit
Adopt high purity silicon micro-powder as packing. The heat expansion coefficient is close to copper wire (copper 16*10- 6/℃). It can expand by heating and contract by cooling simultaneously with the copper wire. In addition, adopt special winding process to eliminate the chap and rejection problems. The mechanical performance of the resin with packing is stronger; tensile strength reaches up to 68MP, no phenomenon affecting the structure of the transformer will appear after the transformer bears the short circuit electric power, therefore the capability of resisting short circuit is greatly enhanced.
5. Safety, environmental protection, maintenance-free, long service life
Being encapsulated by the "Three Proofs" resin of damp-proof, salt mist-proof and fungus-proof resin, they can be put into use without any desiccation, and there is no core suspension repair of oil-immersed transformer. The transformers seldom need repair and even needs no maintenance while running until the service life ends. They have the ability of fire retardation and self-extinguishing, without any toxic gas emitted, belonging to the environmental product. The service life is greatly prolonged by adopting low temperature rise (80-90K, lower than the 100K temperature rise standard of Grade F product), generally can reach up to 30 years.

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Product Tags:

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oil-immersed transformer of 10kv

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