Identification of affecting factors of copper sulfide deposition on insulating paper in oil
Identification of affecting factors of copper sulfide deposition on insulating paper in oil
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DOI：
10.1109/tdei.2009.4784576
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发表时间：
2009-02
影响因子：
3.1
通讯作者：
T. Amimoto;E. Nagao;J. Tanimura;S. Toyama;Y. Fujita;H. Kawarai;N. Yamada
中科院分区：
文献类型：
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作者：
T. Amimoto;E. Nagao;J. Tanimura;S. Toyama;Y. Fujita;H. Kawarai;N. Yamada
通过热老化试验，研究了油品牌号、温度和气氛条件对硫化铜在绝缘纸上沉积的影响。某品牌油脂中出现硫化铜沉积，并发现二苯甲基二硫醚（DBDS）。在硫化铜沉积之前有一个潜伏期。硫化铜的沉积速度随温度的升高而加快。当加热温度增加约10 ℃时，孵育期后的沉积速率变为两倍。无论热老化测试是在空气中还是在氮气气氛中进行，在140 ° C下的孵育期和沉积速率都是相同的。另一方面，在空气中的潜伏期短于在120 ℃的氮气中。沉积速率在120 ℃时不受气氛条件的影响。中间物质由于铜溶解到油中被引入来解释潜伏期和在120 ℃下观察到的潜伏期的气氛依赖性。
Effects of oil brand, temperature and atmosphere conditions on copper sulfide deposition on insulating paper were investigated by thermal aging test. Copper sulfide deposition occurred in a certain oil brand and dibenzyl disulfide (DBDS) was found in the oil. There was an incubation period observed before copper sulfide deposition occurred. Copper sulfide deposition was accelerated by temperature. The deposition rate after the incubation period became twice when the heating temperature was increased by approximately 10degC. The incubation period and the deposition rate were the same at 140degC whether the thermal aging test was done in air or nitrogen atmosphere. On the other hand, the incubation period in air was shorter than that in nitrogen at 120degC. The deposition rate was not affected by atmosphere condition at 120degC. Intermediate substances due to copper dissolution into oil are introduced to explain the incubation period and the atmosphere dependence of incubation period observed at 120degC.