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Abstract ▼ AI-Helper

In this study, outer cover of temperature aging(used for 29 years, 14 years, 10 years) cables were prepared for comparative thermal characteristics and retardant characteristics to predict combustive pattern of power cables(CV-Cable) that are being used in sealed environment of common utility tunnel...

In this study, outer cover of temperature aging(used for 29 years, 14 years, 10 years) cables were prepared for comparative thermal characteristics and retardant characteristics to predict combustive pattern of power cables(CV-Cable) that are being used in sealed environment of common utility tunnel. ISO 5659(smoke density), UL 94(flame retardancy), and NES 713(toxic gas) standards were followed for tests for analysis of smoke generation characteristics and flame retardant characteristics. As result of research, total smoke release of 29 passed years, 14 passed years, and 10 passed years were shown a $3554(m^2/m^2)$, $2735(m^2/m^2)$, and $2342(m^2/m^2)$, respectively in which tendency of increasing total smoke release was shown as used years increased. Also, maximum smoke density was identical to 924Dm by passed years and was shown to be 6.16 times higher than the smoke density performance standard of flame retardant cables which is 150Dm or lower. Toxic index was shown to be 2.7, 1.7, and 0.6 for 29 passed years, 14 passed years, and 10 passed years, respectively in which 29 passed year cable showed more than 4 times higher toxic index that 10 passed year cable.

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