Power Energy Society Mtg

“Ratings of Underground Conductors”   Earn 1.0 CPD Hour
Date: Wednesday, December 10, 2014

Time:       Refreshments: 5:30 Meeting: 6:00 to 7:00 PM

Location:       AEP Office, Conference Room 2C, 700 Morrison Road, Gahanna, Ohio 43230

Abstract:
This presentation provides a fundamental review of the factors impacting the ampacity of underground power cables and a discussion on how the maximum ampacity of a power cable may be calculated. Utilities have maximized the value of their capital plant by rigorously calculating the maximum ampacity of installed facilities. The foundation of calculating ampacity of power cables is the IEEE paper “The Calculation of the Temperature Rise and Load Capability of Cable Systems” written by J. H. Neher and M. H. McGrath. Through the years refinements in the calculation of some of the variables have been made and numerical methods have been developed for the use of computer simulations, however the Neher – McGrath paper still remains the basis upon which all cable rating is done.

A large number of variables impact the ultimate ampacity of an underground system. Some of these variables are part of the design while others are environmentally specific. This presentation will not repeat the rigorous mathematics presented in the Neher – McGrath paper but will focus on the practical matter of reviewing the factors that impact the ampere rating of cable systems and the steps that can be taken to maximize the ampacity of underground power cables. Carefully evaluating the factors that limit the ampacity of underground cable systems and taking the proper engineering measures, will allow the engineer to maximize the value of the installed plant.

Presenter: Harry E. Hackman, Jr. P.E. – Manager of Engineering

Mr. Hackman has over 37 years’ experience in the engineering and design of electric utility substations and facilities. He has extensive experience in the writing of specifications, review and evaluation of proposals, and supervision of the design and construction of substations.  His background includes training substation mechanics in maintenance procedures, and the development and use of database tools to manage substation assets. Mr. Hackman holds a BS in Electrical Engineering from Grove City College.  He is a registered professional engineer in the Commonwealth of Pennsylvania

Please RSVP to Richard Smelker by email to rdsmelker@aep.com Or by phone at 614-552-1697 by 1:00PM, December 8, 2014

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