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                                                                                                                          澆注式互感器表面放電是什么原因導致的?

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                                                                                                                            在使用35KV澆注式電流互感器的時候,有時會出現表面放電,或者傘裙開裂的情況。是什么原因導致的?應該如何解決呢?澆注式互感器廠家給大家介紹一下。

                                                                                                                            1、表面放電的原因及解決方法

                                                                                                                            在其停電檢修時,會發現二次接線盒上方有燒焦、放電的痕跡,其環氧樹脂表面粉化,不能繼續運行。此時可以在澆注式互感器表面干燥的情況下,進行絕緣電阻、直流電阻、交流耐壓等試驗。如果一次端子銅排覆蓋了一層銅綠,而且有明顯的水跡,則說明潮氣已經從裂縫處滲入,只不過受潮情況還不是很嚴重。

                                                                                                                          澆注式互感器表面放電是什么原因導致的?

                                                                                                                            對于解決澆注式互感器表面放電的方法,需對其表面進行防污閃涂處理,厚度保持在0.2-0.3毫米。固化后,需重新測量對二次及地絕緣電阻的情況。側放在水槽中,浸泡7小時取出,表面有水珠時,再去測量一次對二次及地絕緣電阻,進行交流耐壓試驗。

                                                                                                                            2、傘裙開裂的原因及解決方法

                                                                                                                            在對母線進行一、二次設備定檢時,有時會發現澆注式互感器頂端傘裙開裂的情況,澆注的環氧樹脂表面也有粉化現象。這可能是因為環氧樹脂和固化劑配比不合適、攪拌不均勻導致。環氧樹脂固化后,容易碎裂,固化劑占比越高,固化時間就越短,韌性就越低,脆性也就越強。而環氧樹脂和固化劑攪拌不均勻,澆注后干燥固化時間不足,工藝把關不嚴,也會導致傘裙開裂問題。

                                                                                                                            以上便是,澆注式互感器表面放電以及傘裙開裂的原因及解決方法,希望可以幫助大家更好地了解該電流互感器!

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