Abstract

Cable is the bridge connecting electrical equipment, such as transformers, circuit breakers and switchgear, etc, but also a power equipment. The long-running of cable will probably cause insulation material aging, leakage sparking and local overheating occur, which eventually lead to a cable fire and accident, the temperature of cable surface usually reflected the situation of the cable. In the paper, fiber bragg grating temperature sensor, insensitive to external stress was applied in monitoring cable temperature. The temperature of cable surface ranges in the similar curve with ambient temperature.

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