描述
1.回路儀表指示是否異常,一般顯示為降低或零。用于測量表計的電流回路開路。如果發(fā)生計量表計轉(zhuǎn)速緩慢或不轉(zhuǎn)。如表計指示時有時無,則說明此時電流互感器可能處于半開路狀態(tài)(接觸不良)。應(yīng)該提高警惕。
2.電流互感器本體有無噪聲、振動是否均勻、有沒有存在嚴重發(fā)熱、冒煙等現(xiàn)象,當然這些現(xiàn)象在負荷小時表現(xiàn)并不明顯。
3.電流互感器(比方說常用的型號:BH-0.66電流互感器)二次回路端子、元件線頭有無放電、打火現(xiàn)象。
4.繼電器保護發(fā)生誤動或拒動。這種情況可在誤跳閘或越級跳閘時發(fā)現(xiàn)并處理。電度表、繼電器等冒煙燒壞。而有無功功率表及電度表、遠動裝置的變送器、保護裝置的繼電器燒壞,會導致電流互感器的二次開路。
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主營:世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國西屋)系列產(chǎn)品》
⑤SIEMENS(西門子系列產(chǎn)品)》
⑥銷售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系統(tǒng)、WDPF系統(tǒng)、MAX1000系統(tǒng)備件。
⑧Invensys Foxboro(福克斯波羅):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場輸入/輸出模塊)
順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號處理、數(shù)
據(jù)通信及處理等。Invensys Triconex:冗余容錯控制系統(tǒng)、基于三重模件冗余(TMR)
結(jié)構(gòu)的zui現(xiàn)代化的容錯控制器。
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◆Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
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