575-2014

Guide for Bonding Shields and Sheaths of Single-Conductor Power Cables Rated 5 kV through 500 kV


 

 

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标准号
575-2014
发布日期
2014年06月12日
实施日期
2014年09月20日
废止日期
中国标准分类号
/
国际标准分类号
/
发布单位
IEEE - The Institute of Electrical and Electronics Engineers@ Inc.
引用标准
83
适用范围
This guide describes the most common special shield/sheath-bonding systems now in use on high-voltage single-conductor shielded power cables and the methods of calculating shield/sheath voltages and currents@ particularly as applied to three-phase systems operating at 60 kV and above@ with the cable neutral grounded directly or as part of a special bonding system as described in the guide. Although special bonding has been used predominantly in the past on higher voltage cable systems@ more recent attention to shield and sheath losses on distribution class cables has prompted users to consider special bonding on lower voltage class cable systems as well. This is particularly applicable on the collector systems for wind farms@ where long cable runs interconnect the individual wind turbines. While this guide on induced voltages and currents in metallic shields and sheaths is written largely around high-voltage cables operating at 60 kV and above@ the fundamental principles in this document apply equally to singleconductor medium-voltage shielded power cables when installed and operated as outlined in this guide. The user is cautioned to make sure that the installation/operating design does not contravene any local or national regulations. Purpose The purpose of this guide is to provide the cable engineer with recommendations for consideration when designing new power cable delivery systems as well as evaluating existing cable systems. This guide addresses the reduction of cable operational losses and increase in cable current carrying capacity through use of special cable bonding and grounding methods. The guide will also assist the user in calculating the standing shield/sheath voltages for various bonding and grounding methods.

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