35kV電力變壓器 S11-35系列

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型號及含義
Brief introduction to the products

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產品簡介
Brief introduction to the products

S11型35kV級電力變壓器是在總結以往“7” 型、原“9”型電力變壓器設計制造經驗的基礎上更新換代的,新產品采用了新技術、新工藝、新材料、新組件、新結構,不僅節能節材,而且運行安全可靠,已在城鄉電網建設與改造工程項目中推薦使用。

S11 35kV Power Transformer is upgrading on the basis of summarizing the design experience of the past type “7” and the original type “9” power transformer. The new product adopts new technologies, new workmanship, new materials, new components and new structure. It will save not only energy and materials but also operation is safe and reliable, it has been recommended to use in urban and rural power grid construction and renovation projects.

產品結構
Product Structure

鐵心設計時合理選擇磁通密度,保證正常工作電壓下有一定的裕度,在系統電壓偏高時不出現磁飽和現象,硅鋼片本身的磁滯振動小。鐵心材質選用優質冷軋晶粒取向硅鋼片;鐵心為三相三柱式、鐵心柱多級階梯圓柱形;全斜接縫階梯多級疊片、無孔綁扎;夾件可選板式或槽鋼結構,減少焊接量,增加夾件強度,并通過上下夾件的拉螺桿拉緊器身,結構簡單,增加繞組的抗短路能力;同時采取合理的減振措施。并控制疊片的參差離縫,使鐵心磁阻小,漏磁小。6300KVA及以下的鐵軛與心柱截面形狀相同,8000KVA及以上鐵軛為“D”型,以減少角重,降低損耗,最小級片加寬,增加鐵軛與夾件接觸面,改善鐵軛的夾緊狀態。

繞組內部采用油導向結構/軸向油道,有利于散熱,可大幅度降低銅油溫差,使內部各區域的熱油能充分的冷卻,降低繞組的最熱點溫升;無載調壓變壓器其分接范圍僅為±3×2.5%,故不獨立設置調壓繞組,分接引線置于主線圈本體中部,從而簡化結構。高低壓繞組設計時采用新開發的主縱絕緣結構,嚴格控制安匝分布/沖擊分布,降低材料用量;低壓繞組直接繞制在高強度的絕緣紙筒上,高、低壓繞組在繞制時采用輻向、軸向壓緊裝置,增加繞組的壓緊力,減少運行中的收縮;并用內外撐條進行緊固,加強支撐,提高繞組穩定性,防止其失穩變形;繞組可按要求進行浸漆處理和分相整體套裝;且改進壓板結構,加強端部壓緊,以增強機械強度,提高承受短路能力。

改進引線夾緊結構,采用木材與綁扎相結合的形式,使引線固定牢固不位移和松動。

器身采用新的絕緣框架,進行復合場強計算,保證足夠的絕緣強度,具有較高的填充系數;嚴格控制器身干燥結束后在大氣暴露的時間,避免受潮;器身與油箱采用“剛性定位”,提高產品運輸中承受沖擊的能力。

油箱按免吊心結構設計,現場可直接安裝。布局緊湊,造型美觀、結構新穎,可為鐘罩式或折邊瓦楞式結構(平頂式),簡化結構便于加工;箱體選用寬幅鋼板,減少焊縫,增加機械強度;所有密封面(箱沿、法蘭)進行機械加工,采用“O”型密封結構防止滲漏;變壓器油箱及散熱器應能承受0.05Mpa的壓力,并無滲漏、損傷現象。

主體上的附件應有:端子箱采用不銹鋼箱體,密封良好,便于接線;溫度計座(焊在箱蓋

上)二根,置于油箱長軸方向的兩端;氣體繼電器、溫度計、壓力釋放閥引線電纜支架應固定在箱體上,接線引到接線端子箱內。但所有裝在變壓器本體上的附件,最低部件不得低于箱底水平線。


Iron core chose the magnetic flux density reasonably when it was designed. To ensure there is some margin under normal working voltage and no magnetic saturation when the system voltage was too high. The material of the iron core is good quality cold-rolled grain oriented silicon steel sheet; The iron core is three phase, three column and multi ladder cylindrical column core pole; The clamping piece can choose the structure of plate or channel steel, to reduce the amount of the welding and increase its strength. To strain the body by the upper and lower tie bolt, the structure is simple and an increase of anti-short circuit capacity of the winding. At the same time, to take reasonable measures of damping, besides this, to control the irregular seams of the lamination which make the small magnetic resistance and leakage. The section of the yoke is same with the core pole below 6300KVA, 8000KVA or above it, the yoke is “D” type. The purpose is to reduce the weight and waste, the smallest class film is widened, to increase the contact surface between yoke and clamping piece and improve the state of the clamping of the yoke.

Internal of the winding adopts the oil guide structure/ axial direction oil duct, that is conducive to heat dissipation and greatly reduce the copper oil temperature, so that the oil of all regions of the internal can be cooling to reduce the hottest temperature spot of the winding. The tap scope of the no-load transformer is only ±3×2.5%, so we don’t set up the voltage regulation union independently, the tap line is placed in the center of main coil, thus it simplifies the structure. The high-low voltage adopts the principal insulation structure while designing. To control the distribution of ampere turns and impact strictly, thereby the amount of the materials will be reduced. The low voltage winding is winded around the high-strength paper tube directly, the high-low voltage winding adopts the radial and axial direction devices while winding, to increase the pressing force and reduce the constriction in working; At the same time, to tighten the internal and external support bars to make a support, so that the stability of winding is improved, the instability and the deformation is prevented. The winding can be treated with dip coating and packed with division phase; In order to enhance its mechanical strength and improve the ability of bearing the short-circuit, to change the structure of the pressing plate and strengthen the ends.

To improve the lead wire clamping structure, and to adopt the shape of wood combining with colligation which makes the lead wire firm and fixed.

The body adopts the new insulation flame to calculate the composite field intensity and ensure adequate insulation strength, which has large filling coefficient; To control strictly the time of the dried body exposed in the atmosphere and to keep from moisture; The body and the tank adopt “Rigidly Positioned” to improve the capacity of product against the impact during the transportation.

The tank is designed by the structure of suspended core free, it is can be installed directly at site. It has compact layout, beautiful styling and novel structure, it also can be bell or fold corrugated structure (flat-top type), in order to process easily to simplify the structure; Selection of wide steel plate to reduce the weld joint and increase the mechanical strength; To make mechanical processing for all the sealing faces (edge of the box, flange), it adopts “O” type seal structure to prevent the leakage; The tank and the radiator of the transformer should withstand 0.05Mpa pressure, and there is no leakage and injury.

Accessories of main body should contain: the terminal box adopts the stainless steel box which has good leak tightness and easy to connect; two thermometer seats (soldering on the cover) are placed on the two ends of the macro axis of the tank; The gas relay, the thermometer, pressure release valve wire cable support should be fixed on the body, the line is connected into the terminal box. However, the lowest part of all the accessories installing on the body of the transformer can not lower than the horizontal line of the body bottom.


技術參數
Product Structure

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訂貨須知
ordering Information

訂貨方在訂貨時應給本公司提供與產品有關的下列數據

1. 型號規格       

2. 額定容量        

3. 相數      

4. 頻率     

5. 電壓組合/分接范圍

6. 聯結組標號     

7. 短路阻抗     

8. 油箱結構/冷卻方式     

9. 其它特殊要求/使用條件


In order to serve you better, please offer the following parameters when you are choosing our products.

1. Type 

2. Rated Capacity      

3. Phase No.     

4. Frequency

5. Voltage Combination/ Tapping Range    

6. Union Symbol    

7. Short Circuit Impedance

8. Tank Structure/ Cooling Model     

9. Other Special Requests/ Conditions of Use


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