The roof arrester of electric multiple units (EMU) can efficiently limit the overvoltage, and ensure safe operation EMU electrical equipment. In process high-speed operation, traction power supply system is often affected by overvoltage. addition, explosion accidents occasionally occur. this paper, on-line voltage measurement developed. By analysing a large number waveforms, abnormal divided in...

Leakage current measurements can be used to determine the aging condition of ZnO arrester. The leakage that occurs in arrester is divided into two, namely external and internal currents. affected by contamination varistor currents are measured separately their contribution condition. In this study, effect salt on was studied further. level consisted low, medium heavy. obtained analyzed using wa...

In order to understand the thermal and electrical properties of surge arrester under standard climatic conditions, it would be useful evaluate heating progression in its different elements. These are constituted heterogeneous materials, which have physical nonlinear along arrester. Temperature predicting solutions for zinc oxide ceramic blocks provide fundamental elements electrothermal materia...

The fatigue behavior of the unnotched and notched silicon carbide fiber-reinforced titanium/titanium aluminide hybrid laminated composite was investigated at room temperature. The evolution of microstructural damage and its effect on stiffness and strength degradation was quantified as a function of loading cycles and applied stress levels. Fatigue crack propagation behavior and damage mechanis...

Abstract Arrester is used to protect various electrical equipment in the power system from lightning overvoltage, working frequency transient overvoltage impact and damage. Zinc oxide arrester widely system. Creepage distance a necessary item of performance test. It project for factory testing centralized network access testing. At present, measurement creepage mainly adopts artificial method p...

The arrester plays an important role in the protection of DC transmission system, and its thermal characteristics under different operating conditions greatly affect performance. To study multicolumn parallel arresters extreme a considering influence SF6 fluid, structural parameters ±500 kV Niu Cong project were applied for this research. Firstly, 3D model four-column zinc oxide installed on ne...