Title :
Application of medium voltage cable predictive diagnostics
Author :
Lanz, Benjamin ; Broussard, Bruce
Author_Institution :
IMCORP, Storrs, CT
Abstract :
Industrial plant engineers are required to provide a safe and reliable electrical cable infrastructure that will assure maximum uptime at the lowest possible cost. As electric systems age, engineers are faced with the challenges of lower availability of maintenance crews and high financial costs of cable replacement. In order to optimize these challenges, predictive diagnostic tools can be used to effectively monitor and repair discrete locations to extend cable system life. This paper is an overview covering best practices for commissioning new installations and applying predictive diagnostic programs to aging industrial shielded extruded dielectric cable systems rated 5 kV and higher. This paper will examine failure mechanisms in extruded cable and accessories, review the IEEE 400 Guide for Field Testing and Evaluation of the Insulation of Shielded Power Cables, discuss the adverse effects of withstand testing when the objective is to assure system reliability, and present case studies from industrial facilities which demonstrate the ability of defect specific diagnostics to pinpoint defects and avoid future unplanned service outages. Lastly, the use of a taped metal shield will be addressed, examining the aging process that may cause it to be less reliable than other shield designs and limit the ability of the industry to locate failures and assess future cable system performance.
Keywords :
ageing; cable shielding; failure analysis; power cable testing; trees (electrical); aging process; cable replacement; cable system life; defect specific diagnostics; electric systems; electrical cable infrastructure; electrical trees; failure mechanisms; industrial shielded extruded dielectric cable systems; medium voltage cable predictive diagnostics; partial discharge; predictive diagnostic tools; shielded power cables; system reliability; taped metal shield; water trees; Aging; Cable shielding; Costs; Industrial plants; Insulation testing; Medium voltage; Power cables; Reliability engineering; System testing; Systems engineering and theory; cables; defects; electrical trees; medium voltage; partial discharge; predictive diagnostics; testing; water trees;
Conference_Titel :
Pulp and Paper Industry Technical Conference, 2008. PPIC 2008. Conference Record of 2008 54th Annual
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-2524-2
Electronic_ISBN :
0190-2172
DOI :
10.1109/PAPCON.2008.4585805