What is the impact on the external environment insulator

    Glass insulators plays two fundamental roles in overhead transmission lines, namely the support wire and prevent current back to land. The operational life of the whole line (usually 40 years) these two actions essential to be assured that the insulator should not change because of various electrical and mechanical stress caused by environmental and electrical load conditions occur and failure of the insulation to withstand mechanical loads in addition to wire and metal accessories outside of weight, but also need to accept wind loads in case of inclement weather, snow load, galloping and transport means during the impact load caused by improper operation. From the electrical point of view, not as long as the wires and insulators insulation is also necessary impulse withstand overvoltage caused by lightning and switching operations, when the impact occurred due to voltage flashover caused localized overheating should not lead to burst glass insulator body . All external factors will affect the occurrence of the insulator performance, therefore, also on the insulator design put forward higher requirements.