安阳干式变压器：“干福”安阳干式变压器产品技术特点

“干福”安阳干式变压器产品技术特点 　　
(1)局部放电值低，干福安阳干式变压器的高压绕组相邻匝间只有一个匝电动势，仅为6-40V，远低于层式绕组大匝间电压(层式绕组相邻匝间大电压可达kV级)。层间绝缘承受的工作电压越低，高电压引起的局部放电量也越小。局部放电量在GB/T 10228-1997《安阳干式变压器技术参数和要求》中，已将局部放电试验列为例行试验之一。
“干福’安阳干式变压器的局部故电起始电压比额定运行电压高，从而减少了由局部放电面引起的寿命损失。
(2)抗开裂性能好，树脂浇注安阳干式变压器的绕组不但外观质量好，而且抗开裂性能好。对于填料型树脂，铝导体与其有相近的热形胀系数，并且树脂浇注层中有玻璃纤维网格作骨架，使其与导体间的摩擦力降至低。
“干福”安阳干式变压器的绕组定期进行各种抗开裂试脸，其主要有以下三种方法:
1)冷热交变试脸。浇注绕组从+ 20℃降至一25℃，再升温至+20℃为一个周期，共进行四个周期。绕组应无开裂，且在通过雷电冲击试验后才为合格。
对于寒冷地区.按温度-55到+20℃进行试验。
2）热冲击试验。浇注绕组冷却至-25℃然后通入2倍额定电流，使绕组平均温度升至145''C。绕组应无开裂，且在通过雷电冲击试验后才为合格。
3)快速老化试验。绕组通电后升温.使内部热点温度保持在180摄氏度抢续2 500h以上。试验后，绕组表面应不开裂.且在通过75%的雷电冲击电压后才为合格。
(3)散热性能好，树脂是热的不良导体。当树脂加入填料后，可有效改善热传导性。“干福”安阳干式变压器采用的是填料型树脂.硅徽粉填料约占混合料的2/3,其导热系数是纯树脂的3—4倍。

"Gan" technical characteristics of transformers

(1) low PD values??, "Fu-" high-voltage winding of the transformer is only one turn between adjacent turns of electromotive force, is only 6-40V, well below the maximum level winding inter-turn voltage (layer winding adjacent turns of the largest up kV voltage level). Layer of insulation withstand voltage is lower, due to the high-voltage partial discharge is also smaller. Partial discharge in GB / T 10228-1997 "dry-type transformers technical parameters and requirements", the partial discharge test has been listed as one of routine tests.
"Fu-'and therefore the local electric transformer starting voltage higher than the rated operating voltage, thereby reducing the surface caused by the partial discharge of life lost.
(2) anti-cracking performance, resin cast dry-type transformer windings is not only the appearance of good quality, and anti-cracking performance. For the filling resin, aluminum conductor with a similar thermal expansion coefficient of shape, and resin-cast layer of fiberglass mesh as the skeleton so企业账号：1611 0032 092 00213 086 that it minimizes the friction between the conductor.
"Gan" transformer windings on a regular basis face a variety of anti-cracking test, there are three main ways:
1) try alternating hot and cold face. + 20 ℃ pouring winding down from a 25 ℃, and then heated to +20 ℃ for a period, a total of four cycles. Windings should be no cracking, and after the impact test by lightning qualified.
For cold regions. According to the temperature -55 to +20 ℃ test.
2) thermal shock test. Pouring winding cooled to -25 ℃ and then pass into the 2 times rated current, so that the average winding temperature rise 145''C. Windings should be no cracking, and after the impact test by lightning qualified.
3) rapid aging test. After heating up energized winding. To maintain the internal temperature of 180 degrees Celsius hot rush continued for more than 2 500h. Test, the winding surface should not crack. And by 75% in the lightning impulse voltage after the qualified.
(3) thermal performance, the resin is a poor conductor of heat. When the resin by adding fillers, can effectively improve传 真：0635-8888109 the thermal conductivity. "Gan" transformer uses filler resin Silicon emblem powder mixture filling about 2 / 3, its thermal conductivity is 3-4 times that of pure resin.

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