Detection and Prediction of Internal-Caused Fire in Tunnel Cable by an Equivalent Transient Thermal Circuit Model

Figure 14

(a) Variation curve of relative error with the number of layers of insulation layer; (b) variation curve of relative error with the number of layers of inner sheath layer; (c) variation curve of relative error with the number of layers of outer sheath layer.

(a)

(b)

(c)