Polymer insulators are also called composite insulators.They are made of fiber glass core with silicon rubber sheath,and metal fittings on both ends are crimped. The polymeric insulators has better performance in hydrophobicity and electrical aspects compared with porcelain insulators.On the other hand,it is lighter in weight which are more convinient for transportation.
As we know,high voltage insulators shall subject to mechanical failing load test, and when we mention “test in vertical position and horizontal position”, this more refer to suspension insulator, tension insulator, post insulator and pin insulator. The suspension and tension insulator are normally tested in horizontal direction, as they are long in shape, with length […]
End fitting of railway insulator of Indian market The end fittings of silicone composite insulator for 25KV railway overhead traction have specific requirements. The end fittings shall be made of spheroidal graphite cast iron to grade: 400/15 of IS:1865-1991 or forged steel fittings to BS-970(Part-II). Approval of the type test of the insulator implies employment […]