A simplified method of the thermal field analysis in the core insulation using the Green's function

In the paper a simplified method of determination of the thermal field in wire insulation was presented by using the Green's function. The basic of the method is the decomposition of the regions of the wire. The core of the insulation was modeled as a inert element of the first order, and the insulation was analyzed as the distributed parameter. As a result, heating up curves and time constant in the insulation of the wire were determined for the constant (averaged) and variable resistivity. The result was positively verified using the finite element method.