Insulating materialrole is in theelectrical equipmentin theelectric potentialdifferentlive partsisolated.Theinsulating material is firstshould have highinsulation

Insulating materialrole is in theelectrical equipmentin theelectric potentialdifferentlive partsisolated.Theinsulating material is firstshould have highinsulation

绝缘材料的作用是在电气设备中把电势不同的带电部分隔离开来。因此绝缘材料首先应具有较高的绝缘电阻和耐压强度,并能避免发生漏电、击穿等事故。其次耐热性能要好,避免因长期过热而老化变质;此外,还应有良好的导热性、耐潮防雷性和较高的机械强度以及工艺加工方便等特点。根据上述要求,常用绝缘材料的性能指标有绝缘强度、抗张强度、比重、膨胀系数等。