A COMPARISON OF THE ANSI IEEE AND THE CENELEC/IEC APPROACHES TO OVERLOAD PROTECTION OF INSULATED POWER-CABLES/

The same basic principles on which the methods of power cable protecti on against overloads are based, are summed up by different criteria an d formulations within ANSI/IEEE and CENELEC/IEC publications. The stud ies carried out by the technical committees of these organizations hal e been examined and compared, in order to point out not only their dif ferences, but also their complementary aspects. By combining the two a pproaches, it has been possible to outline a ''third way'' to determin e the admissible duration of overload currents and define intermediate criteria for the emergency ratings of cables and for the coordination of protective devices.