Optimization of the design of metallic shield-concentric conductors of extruded dielectric cables under fault conditions
Abstract
Maximum metallic shield withstand temperatures under short-circuit conditions were determined for round wire and flat strap shielded XLPE insulated cables with various commonly used insulation shield and jacket compounds in sleeved and extruded jacket constructions. A mathematical model and computer program were developed for the calculation of shield temperatures under short-circuit conditions involving various currents and reclosing sequences for the cables tested in this project. These important accomplishments permit the cable engineer to optimize the designs of XLPE insulated cable with round wire and flat strap shields. A simplified laboratory short-circuit test was developed which can be used to establish the short-circuit limitations of cable designs which (1) are subjected to short-circuit conditions significantly different from those utilized in this program and (2) employ insulation shield and jacket compounds with significantly different physical and thermal characteristics than those employed on the cables tested.
- Publication:
-
Final Report Pirelli Cable Corp
- Pub Date:
- April 1983
- Bibcode:
- 1983pcc..rept.....S
- Keywords:
-
- Computer Programs;
- Heat Shielding;
- Mathematical Models;
- Optimization;
- Power Lines;
- Short Circuits;
- Computerized Simulation;
- Dielectrics;
- Electrical Faults;
- Electrical Insulation;
- Transmission Lines;
- Electronics and Electrical Engineering