J
J. Kuffel
Researcher at Hydro One
Publications - 5
Citations - 174
J. Kuffel is an academic researcher from Hydro One. The author has contributed to research in topics: Acoustic emission & Shell (structure). The author has an hindex of 3, co-authored 5 publications receiving 170 citations.
Papers
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Journal ArticleDOI
Selection of station insulators with respect to ice and snow-part I: technical context and environmental exposure
Masoud Farzaneh,T. Baker,A. Bernstorf,J.T. Burnham,T. Carreira,E.A. Cherney,W. A. Chisholm,R. Christman,R. Cole,J. Cortinas,C. de Tourreil,J.F. Drapeau,J. Farzaneh-Dehkordi,S. Fikke,R.S. Gorur,T. Grisham,Ivan Gutman,J. Kuffel,A. J. Phillips,G. Powell,L. Rolfseng,M. Roy,T. Rozek,D.L. Ruff,A. E. Schwalm,V. Sklenicka,G. A. Stewart,Raji Sundararajan,M. Szeto,R. Tay,J. Zhang +30 more
TL;DR: In this paper, the authors describe the environmental and insulator parameters that influence the risk of flashover on station insulators exposed to freezing conditions, and propose a solution to select adequate insulators for substations at distribution and transmission voltage levels.
Journal ArticleDOI
The cold-fog test [for outdoor insulators]
W. A. Chisholm,K. G. Ringler,C. C. Erven,Martin A. Green,O. Melo,Y. Tam,O. Nigol,J. Kuffel,A. Boyer,I. K. Pavasars,F. X. Macedo,J. K. Sabiston,R. B. Caputo +12 more
TL;DR: In this paper, the electrical performance of outdoor insulation degrades severely during combinations of factors that include surface contamination, ice, fog and an ambient temperature that rises through 0/spl deg/C (T(0/spl dec deg/c), and failure occurs with increasing probability under those conditions.
Journal ArticleDOI
Selection of station insulators with respect to ice and snow-part II: methods of selection and options for mitigation
Masoud Farzaneh,T. Baker,A. Bernstorf,J.T. Burnham,T. Carreira,E.A. Cherney,W. A. Chisholm,R. Christman,R. Cole,J. Cortinas,C. de Tourreil,J.F. Drapeau,J. Farzaneh-Dehkordi,S. Fikke,R.S. Gorur,T. Grisham,Ivan Gutman,J. Kuffel,A. J. Phillips,G. Powell,L. Rolfseng,M. Roy,T. Rozek,D.L. Ruff,A. E. Schwalm,V. Sklenicka,G. A. Stewart,Raji Sundararajan,M. Szeto,R. Tay,J. Zhang +30 more
TL;DR: In this paper, additional measures for selecting adequate station insulators at distribution and transmission voltage levels should be taken, including insulator size, shape, surface material, surface quality, electric field improvement, and orientation.
Proceedings ArticleDOI
Testing and modelling hollow-core composite station post insulators under short-circuit conditions
TL;DR: In this paper, hollow core composite 230-kV station post insulators have been tested with single-phase short-circuit currents, simulating levels up to 85 kA rms-symmetric current (worst-case offset for an outer phase) in a three-phase system.
Journal ArticleDOI
Short-circuit capacity of temporary grounding cables
TL;DR: In this article, the authors present a computer program for generating high-current short-duration failure characteristics of personnel grounding cables based on an approach which relates the temperature rise of a cable to the time integral of current density.