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Along with the electric power electronic installation's widespread use, in electrical network's overtone pollution condition is day by day serious. At present widely uses the overtone processing method is reduces the overtone or the filtration overtone as far as possible. The traditional filter equipment not only facility cost high invests in a big way, moreover wasted in vain has been possible to perform the use the overtone energy. The present paper proposed that one kind carries on the electrical machinery dragging using the overtone the method and the equipment, this equipment can the electrical network harmful, and present is filtered by the electric power department the overtone energy uses, uses in actuating the direct current machine. 谐波 The overtone谐波的危害 the overtone harm谐波抑制 harmonic suppression 无源滤波器 The passive filter, 基波消磁电路the fundamental wave degaussing electric circuit 谐波拖动the overtone drives
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架空绝缘线，Aerial Insulation Line，由单层或多层铝线绞合，在导线外面挤出绝缘层的绝缘导线，这种导线由杆塔将导线架设在一定高度传输电力的线路，适用于高低压输变电架空线路。对于高压输配电网架空线的对地绝缘一般是靠空气，以前的配电线路（10kV以下除380V）一般也采用裸导线，但由于市区配电环境复杂，常常发生短路接地及雷击线路的情况，导致供电可靠性降低，所以目前一般10kV以下架空线路都采用绝缘导线（即导线外层包裹绝缘层），这就是所谓的绝缘架空线。架空线有低压和高压之分，有带内屏和不带内屏之分，型号有：JKLYJ、JKLGYJ。JKLYJ是全铝架空线，JKLGYJ是钢芯架空绝缘线，即铝芯中间部分会有一根或几根绞合在一起的钢丝，起着抗拉力的作用。JK代表架空，L代表铝芯，G代表钢芯，YJ代表交联聚乙烯。
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中文名称：架空绝缘线英文名称：Aerial insulation line定义：单层或多层铝股线绞合在上面挤制绝缘层的导线所谓架空线是相对电缆说的，就是由杆塔将导线架设在一定高度传输电能的线路。对于高压输配电网架空线的对地绝缘一般是靠空气的，之前的配电线路（10kV以下除380V）一般也采用裸导线，但由于市区配电环境复杂，常常发生短路接地及雷击线路的情况，导致供电可靠性降低，所以目前一般10kV以下架空线路都采用绝缘导线（即导线外层包裹绝缘层），这就是所谓的绝缘架空线。架空线有低压和高压之分，一般型号分为很多种，比如路灯架空线来说，JKLYJ*10KVA*50*100，就说明了架空线的电压，型号，材质，芯的截面积和长度。
