Results 171 to 180 of about 138,563 (198)

Increasing ampacity of cables by an application of ventilated pipes

Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting., 2004
We show that a substantial increase of cable ampacity can be achieved, if air-filled pipes are used, laying parallel to the cable cores or containing them, and if the ends of these pipes are lead up to the soil surface and therefore interacting with the ambient air.
H. Brakelmann, G. Anders
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Point-and-click cable ampacity studies

IEEE Computer Applications in Power, 1998
For determining the maximum current power cables can sustain from a thermal point of view without deterioration of any of their electrical and/or mechanical properties is an important design aspect of electrical installations. The accuracy of these ampacity studies provides significant insight towards intelligently upgrading existing power cable ...
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Ampacities for Cables in Randomly Filled Trays

IEEE Transactions on Power Apparatus and Systems, 1971
The allowable current which may be carried by a given conductor size cable has been thoroughly investigated in almost every conceivable type of cable installation. One area which has not had much attention up to now is the allowable current which can be carried by cables in cable trays, or troughs.
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Probabilistic Determination of Power Cable Ampacity

Electric Machines & Power Systems, 1992
This paper reports that a probabilistic evaluation of the ampacity of naturally cooled and forced-cooled 300 KV underground cables has been carried out from the deterministic sensitivity studies of cable ampacities. The results show that probabilistic studies of cable ampacities should be carried out because deterministic studies give conservative ...
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Configuration Optimization of Underground Cables for Best Ampacity

IEEE Transactions on Power Delivery, 2010
This paper presents a method for configuring the locations of any number of cables, for the best total ampacity. The optimal configuration is determined through a proposed two-level optimization algorithm. At the outer level, a combinatorial optimization based on a genetic algorithm explores the different possible configurations.
Wael Moutassem, George J. Anders
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Major factors affecting cable ampacity

2006 IEEE Power Engineering Society General Meeting, 2006
This paper presents a parametric study of the major factors affecting cable ampacity calculations. The current carrying capacity (or ampacity) of a cable depends on many of the installation properties and conditions. In this paper the effects on ampacity of conductor size, ambient temperature, bonding arrangement, duct size, soil thermal resistivity ...
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Analysis of influential factors on the underground cable ampacity

2011 Electrical Insulation Conference (EIC)., 2011
The extensive usage of underground cables is a typical feature of modern power distribution networks. To analyze the influential factors on the underground cable ampacity, a new numerical method to calculate the ampacity of the underground cable is described in this paper.
Youyuan Wang, Rengang Chen, Jian Li, Stanislaw Grzybowski, Taosha Jiang   +4 more
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Accurate Assessment of Thermal Field and Ampacity of Underground Power Cables

2006 Canadian Conference on Electrical and Computer Engineering, 2006
A newer approach to cable thermal field and ampacity computations using a proposed concept of perturbed finite-element analysis is formulated. This approach involves the use of derived sensitivity coefficients associated with various cable parameters of interest and using such sensitivity coefficients to achieve optimal cable performance. The technique
Mamdooh S. Al-Saud, M. A. El-Kady, Raymond D. Findlay   +2 more
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Ampacity reduction factors for cables crossing thermally unfavorable regions

IEEE Transactions on Power Delivery, 2001
When power cables cross regions with unfavorable thermal conditions, temperatures higher than the design value can occur. If the region is wide enough, the rating of the cable will usually be based on the assumption that the entire route is characterized by the same conditions.
H. Brakelmann, G. Anders
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Modeling and analysis of HV cable ampacity for power flow optimization

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, 2017
This paper presents a new approach for the determination of underground cable ampacity that considers surrounding medium of the cable, and compares the results from the FEM model with standard approach. It shows how ampacity of a buried cable is affected by the extent of heat transfer from the cable to the surrounding soil and also by the heterogeneity
Nishanthi Duraisamy, Hoay Beng Gooi, Abhisek Ukil   +2 more
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