Study of the dielectric properties of flame retardant insulation during thermal ageing
Authors
Jaroslav Lelák
Vladimír Ďurman
Ján Budaj
Abstract
Abstract. The complex permittivity of the flame retarding cables with combined insulation has been investigated during a long-term thermal ageing. The both parts of epsilon* were measured in the very low frequency range by using a special instrument made for this purpose. They were also measured with help of the time domain dielectric spectroscopy. The frequency dependences of epsilon* were compared with those calculated by the Cole - Cole dispersion formula. The dc electrical conductivity sigma0 was derived by means of numerical fitting.
