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      1. 交流接觸器節(jié)能技術(shù)

        2014/1/2 8:35:18      點擊:
        交流接觸器 廣泛應(yīng)用于低壓電路中,是一種使用安全、控制方便、量大而面廣的工業(yè)必需品。我國現(xiàn)在普遍使用的額定電流在63A及以上的大、中容量交流接觸器應(yīng)以上億臺計,其操作電磁系統(tǒng)在吸持時消耗的有功功率在10W~100W之間;消耗的無功功率則在數(shù)十乏爾至數(shù)百乏爾之間。所耗有功功率的分配大致為:鐵芯65%~75%、短路環(huán)25%~30%、線圈3%~5%。對于我國這樣一個正處于工業(yè)化、城市化進程加快的交流接觸器使用大國,且能源需求日趨緊張,節(jié)約電力資源已成為當(dāng)務(wù)之急。
        如對上述交流接觸器的操作電磁系統(tǒng)采用相應(yīng)的節(jié)電技術(shù),將其操作電磁系統(tǒng)由原設(shè)計的交流吸持改為直流吸持,可以節(jié)省鐵芯和短路環(huán)中絕大部分的損耗功率,從而取得較高的節(jié)電效率(一般有功節(jié)電率>90%以上)。不僅如此,通過改造還可降低或消除噪音,降低線圈溫升并延長接觸器的使用壽命。
        節(jié)電標(biāo)準(zhǔn)

        為了適應(yīng)能源結(jié)構(gòu)調(diào)整需要,我國在原有GB 8871-----1998《交流接觸器節(jié)電及其應(yīng)用技術(shù)條件》基礎(chǔ)上,對標(biāo)準(zhǔn)重新進行了修訂,并頒布GB 8871---2001《交流接觸器節(jié)電器》。在新標(biāo)準(zhǔn)中,對噪聲及噪聲試驗、節(jié)電率及節(jié)電率的測量、電磁兼容EMC及試驗條款都列入強制執(zhí)行條款,這無疑對交流接觸器節(jié)能技術(shù)的研究推廣起到積極作用。
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