Importance of transformer oil test!

变压器油是流动的液体，可充满油箱内部各部件之间的气隙，排除空气，从而防止各部件受潮而引起绝缘强度降低。变压器油在运行中还可以吸收绕组和铁芯产生的热量，起到散热和冷却的作用。

Transformer oil is a flowing liquid, which can fill the air gap between the components in the oil tank and remove the air, so as to prevent the components from moisture and reduce the insulation strength. Transformer oil can also absorb the heat generated by winding and iron core during operation, playing the role of heat dissipation and cooling.

因此变压器油都需要做检测试验。试验项目一般为耐压试验、介质损耗试验和简化试验。

Therefore, all transformer oils need to be tested. The test items are voltage withstand test, dielectric loss test and simplified test.

变压器油的检验指标包括：1、外观；2、水溶性酸；3、酸值；4、闭口闪点；5、介质损耗因数；6、微量水分；7、绝缘强度；8、体积电阻率；9、油中溶解气体分析。如果使用在超 高压上的油还要做含气量试验。

Inspection indexes of transformer oil include: 1. Appearance; 2. Water soluble acid; 3. Acid value; 4. Closed flash point; 5. Dielectric loss factor; 6. Trace moisture; 7. Insulation strength; 8. Volume resistivity; 9. Analysis of dissolved gas in oil. If the oil is used on ultra-high pressure, the gas content test shall be conducted.
             

变压器油电气性能变化的影响？

Influence of transformer oil electrical performance change?

所以加强对变压器油化验技术的重视程度，不断优化变压器油化验技术水平，可以改善变压器油对供电设备的保障，促使电力供应系统运行水平的提高。

Therefore, to strengthen the importance of transformer oil testing technology and constantly optimize the level of transformer oil testing technology can improve the protection of transformer oil for power supply equipment and promote the improvement of power supply system operation level.

通常新变压器油大都具有较高的纯度，很少有介质被损失，小于0.01。 随着变压器运行的时间不断增加，变压器油质会受到各种因素的影响，比如水分、 杂质等，介质的损伤会逐渐加大。

Usually, most of the new transformer oil has high purity, few medium is lost, less than 0.01. With the continuous increase of transformer operation time, transformer oil quality will be affected by various factors, such as moisture, impurities, etc., and the damage of medium will gradually increase.

一旦变压器油中的水分超过0.02%，介质的损伤会进一步扩大，如果介质损伤达到0.3，变压器设备的运行将会受到严重的威胁，要采取适宜的措施加以处理。

Once the moisture in transformer oil exceeds 0.02%, the damage of medium will be further expanded. If the damage reaches 0.3, the operation of transformer equipment will be seriously threatened, and appropriate measures should be taken to deal with it.

此外，击穿电压也会受到变压器内含水量的影响，具备越多的含水量，击穿电压就越低。 如果其含水量已经超过0.02，击穿电压进一步降低，在降低到规定数值后，就会影响变压器的正常运行。

In addition, the breakdown voltage is also affected by the water content of the transformer. The more water content there is, the lower the breakdown voltage will be. If the water content has exceeded 0.02, the breakdown voltage will be further reduced, which will affect the normal operation of the transformer.