The reliability of one 25kV 8kN Composite railway insulator depends upon its electrical and mechanical strength. With the advent of modern manufacturing, mechanical molding and fixture technique, the mechanical strength is quite reliable. Compared with porcelain railway insulator, 25kV 8kN Composite railway insulator has more advantages. However the reason for porcelain disc suspension insulator was not failure of insulators, which is not fully guaranteed.

25kV 8kN Composite railway insulator is especially suitable for polluted area, high mechanical tensile load large span and compact line. 25kV 8kN Composite railway insulator has the feature of light weight, small volume, not easily broken, high mechanical strength, high pollution resistance, good ageing resistance, high anti explosive and others.