ABB MS132-10電動機保護器_廈門海通華業科技有限公司

ABB MS132-10電動機保護器

電動機保護器的作用是給電機的保護控制，在電機出現過流、欠流、斷相、堵轉、短路、過壓、欠壓、漏電、三相不平衡、過熱、接地、軸承磨損、定轉子偏心時、繞組老化予以報警或保護控制。

主要種類

(一)熱繼電器是五十年代初引進蘇聯技術開發的金屬片機械式電動機過載保護器。它在保護電動機過載方面具有反時限性能和結構簡單的特點。但存在功能少，無斷相保護，對電機發生通風不暢，掃膛、堵轉、長期過載；頻繁啟動等故障不起保護作用。這主要是因為熱繼電器動作曲線和電動機實際保護曲線不一致，失去了保護作用。且重復性能差，大電流過載或短路故障後不能再次使用，調整誤差大、易受環境溫度的影響誤動或拒動，功耗大、耗材多、性能指標落後等缺陷。

(二)溫度繼電器是採用雙金屬片制成的盤式或其他形式的繼電器，具有結構簡單、動作可靠，保護範圍廣泛等優點，但動作緩慢，返回時間長，3KW以上的三角形接法電動機不宜使用。如今在電風扇、電冰箱、空調壓縮機等方面大量使用。

溫度繼電器與熱繼電器不同。溫度繼電器是裝在電動機內部，靠溫度變化時期動作的。而熱繼電器裝在動力線上，靠電流熱效應動作的。

(三)電子式電動機保護器已由晶體管發展到集成電路至今已發展到微處理芯片厚模電路，從功能上一般分為斷相保護、綜合保護（多功能保護）、溫度保護和智能保護。此類保護器具有節能、動作靈敏、度高、耐衝擊振動，重復性好、保護功能、功耗小等優點。

1.電動機保護器（電機保護器）是以檢測線電流的變化（包括採取、正序、負序、零序和過流）為原則，可檢測斷相或過載信號。除具有斷相保護功能外，還具有過負荷、堵轉保護功能。

2.智能保護：集保護、遙測、通訊、遙控與一體的電動機保護裝置，對電動機發生斷相、過載、短路、欠壓、過壓和漏電等故障時實現保護，還具有電流電壓顯示，時間控制，軟件自診斷，來電自恢復，自啟動順序，故障記憶，自瑣和遠傳報警，顯示故障時的電流、電壓故障前後用代號閃爍示警，配置RS485通訊接口，實現計算機聯網。同時可監控、監測256臺電動機工作等功能。

（四）電動機保護器在國民經濟和節能事業中的重要意義

電動機保護器（電機保護器）是發電、供電、用電係統的重要器件。是跨行業、量大面廣、節能效果顯著的節能機電產品。幾乎滲透到所有用電領域；是工業、農業和國防建設及人民生活正常生產和工作的重要保證，在國民經濟和節能事業中有著不可替代的重要地位和作用。

《中華人民共和國節約能源法》規定：“節能是指加強用能管理，採取技術上可行、經濟上合理以及環境和社會可以承受的措施，減少從能源生產到消費各個環節中的損失和浪費，更加有效、合理地利用能源”；“節能發展經濟的一項長遠戰略方針”。節能是係統工程。據不完全統計，運行的1KW-320KW低壓電動機數量為6000萬臺，佔電網用電量的70%以上，是工農業及商業係統中應用為廣泛的動力設備。每年燒毀電動機數量約300萬臺，容量為10億千瓦，每年僅電動機在燒毀過程中就耗電為數億度，修理費高達數100億元左右，造成停工停產損失竟達數100億元。僅上述費用不算，還會造成電機修理後功率下降，耗電量大，性能變差直接影響企業正常生產。

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