A Study on the Insulation Resistance in Cable with Rising Temperature

Kang, Sin-Dong; Kim, Ju-Hee; Kim, Jae-Ho

doi:10.5207/jieie.2018.32.3.072

Cited by 1 publication

(2 citation statements)

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“…This law has been used in accelerated degradation tests that accelerate aging according to time and temperature. The authors verified that the Arrhenius equation could be applicable to cable insulators and that insulation resistance decreased as temperature increased, indicating an inversely proportional relationship [2].…”

Section: Arrhenius Equationmentioning

confidence: 82%

“…The major causes of fires occurring in cables are short circuit fault due to insulation aging, ground fault, overload, electric leakage, partial disconnection, and tracking. The insulation aging is mainly due to electrical, thermal, chemical, and mechanical factors and water absorption, which all induce insulator damage or mixture of foreign matters, and arc faults occur because of short circuit fault and ground fault, thereby igniting cables [2,3]. However, as cable fire accidents caused by insulation aging may occur in a state that cannot identify external changes by bare eyes, preventing fire accidents caused by insulation aging in advance is difficult [4].…”

Section: Introductionmentioning

confidence: 99%

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Investigation on the Insulation Resistance Characteristics of Low Voltage Cable

Kang

Kim

2020

Energies

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This study evaluated the insulation resistance characteristics of TFR-8 (Tray Frame Retardant power cable for fire service) and VCTF (Light PVC Sheathed Circular Cord) cables under external flame, over-current, and accelerated degradation tests. In the accelerated degradation test of the cable, aging times of 10, 20, 30, and 40 years were tested according to a temperature derived using the Arrhenius equation. The insulation resistance of the TFR-8 cables was reduced from a maximum of 7.5 T ohm to 0.008 T ohm during the flame contact and recovered to its original state after cooling. However, dielectric breakdown occurred in the VCTF cable during flame contact and the cable did not return to its original state, even after cooling. In the forced convection oven test, the insulation resistance of the cable was reduced at 160 °C, whereas the insulation resistance of the cable was reduced at 125 °C in the over-current test. This result implied that the over-current had a greater impact than did heat applied externally on the degradation of the cable insulator. In the accelerated degradation tests from 10–30 years, the TFR-8 cable did not show any reduction in insulation resistance at room temperature. However, after an induced aging time of 40 years, the cable showed a rapid reduction in insulation resistance at room temperature.

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Section: Arrhenius Equationmentioning

confidence: 82%