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In recent years, some composite hollow core insulators of current transformers used in China Ningxia Power Grid have showed different levels of degradation and cracking phenomena, especially electrical tracking and erosion. After 10 years operation in a quite dry area, the liquid silicone rubber kept a good state of hydrophobicity and hardness. It seemed the transformer jacket erosion phenomenon cannot...
The optical properties of zinc dialkyldithiophosphate (ZDDP) were investigated using a transmission-mode terahertz time-domain spectroscopy (THz-TDS) measurement. Comparing with the middle-infrared spectra of ZDDP, THz spectra of ZDDP show the weak broad absorption bands, and the absorption coefficients increased monotonously as the frequency increases within the effective frequency range. The selected...
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