The effect on ampacity for multiple cable crossing and mitigation to improve its ampacity

Ainin Sofiya Radzi, Nur Amira Nor Arifin, Tashia M. Anthony, Zairul Aida, Nurul Azlina, Avinash Raj, Chandan Kumar Chakrabarty, Nurul Syaza

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

At some point underground, there are high voltage cables and medium voltage cables that will be crossing each other. Many utilities do not consider or ignore the derating of ampacity caused by multiple cables crossing. In IEC 60287-3-3: Calculation of Power Ratings - Cables Crossing External Heat Sources, the ampacity rating for only two crossing cables is calculated. This paper hence computes the ampacity for multiple cables crossing. Three circuits of high voltage cables crossing three circuits of medium voltage cables were modeled using Computer Simulation Technology (CST) Software. Both the cables were in the parallel configuration with the distance between the circuits and depth of buried varied. Significant temperature rise was found at the point of crossing. If the ampacity were not derated, the temperature exceeds 90°C at the core and becomes unacceptable for the insulation at the point of crossing which causes localized dielectric ageing which may lead to premature cable failures. By extracting the temperature results along the cables at the point of crossing and its vicinity, the localized over-heating at the point of crossing were shown. Also, by adding a steel block between the cables at point of crossing, ampacity can be improved. Hence, this is an important factor that needed to be considered during planning stage.

Original languageEnglish
Title of host publicationPECON 2016 - 2016 IEEE 6th International Conference on Power and Energy, Conference Proceeding
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages301-305
Number of pages5
ISBN (Electronic)9781509025473
DOIs
Publication statusPublished - 16 Jun 2017
Event6th IEEE International Conference on Power and Energy, PECON 2016 - Melaka, Malaysia
Duration: 28 Nov 201629 Nov 2016

Publication series

NamePECON 2016 - 2016 IEEE 6th International Conference on Power and Energy, Conference Proceeding

Other

Other6th IEEE International Conference on Power and Energy, PECON 2016
CountryMalaysia
CityMelaka
Period28/11/1629/11/16

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All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Fuel Technology

Cite this

Radzi, A. S., Arifin, N. A. N., Anthony, T. M., Aida, Z., Azlina, N., Raj, A., ... Syaza, N. (2017). The effect on ampacity for multiple cable crossing and mitigation to improve its ampacity. In PECON 2016 - 2016 IEEE 6th International Conference on Power and Energy, Conference Proceeding (pp. 301-305). [7951577] (PECON 2016 - 2016 IEEE 6th International Conference on Power and Energy, Conference Proceeding). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PECON.2016.7951577