HB 102-1997 (CJC 6) Coordination of power and tele
电力与电信协调——低频感应(LFI)LFI代码应用指南
HB 102-1997 (CJC 6) Coordination of power and telecommunications - Low Frequency Induction (LFI)- Application
Coordination of Power and Telecommunications—Low Frequency Induction (LFI) Application Guide to the LFI Code
标准信息
STANDARD INFORMATION- 标准编号
- HB 102-1997 (CJC 6) Coordination of power and tele
- 所属分类
- 其他国外标准与工程资料
- 发布机构
- Standards Australia
- 版本年份
- 1997
- 文件语言
- 英语
- 文件格式
- 文件页数
- 6 页
- 文件大小
- 1.12 MB
中文名称为参考译名,文件语言以原文为准。
· 更新:
标准简介
OVERVIEW中文简介
该标准是低频感应(LFI)代码的应用指南,旨在指导电力线与电信线路之间的协调工作。它详细阐述了低频感应的机制、感应电压的计算方法以及确定最佳工程解决方案的程序,适用于电力和电信行业在规划、设计和运营中处理电磁干扰问题。
English summary
This standard serves as an application guide to the Low Frequency Induction (LFI) Code, providing guidance on the coordination between power and telecommunications systems. It details the mechanisms of low-frequency induction, methods for calculating induced voltages, and procedures for determining optimal engineering solutions, applicable to the power and telecommunications industries managing electromagnetic interference.
以上为根据文件整理的内容简介。
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1
CJC 6—1997
SAA HB102—1997
COORDINATION OF POWER AND TELECOMMUNICATIONS—LOW FREQUENCY INDUCTION (LFI)
Application Guide to the LFI Code
2
Publication Information
This Publication was prepared under the authority of Standards Australia Committee ET/7, Coordinating Committee for Power and Telecommunications (CCPT), the successor to the Joint Committee for the Coordination of Power and Telecommunications Systems (CJC). It was published by Standards Australia on 5 November 1997.
Review of this Publication Suggestions for improvement to this Publication, addressed to the head office Standards Australia are welcomed. Notification of any inaccuracy or ambiguity found in this Publication should be made without delay in order that the matter may be investigated and appropriate action taken.
3
COORDINATION OF POWER AND TELECOMMUNICATIONS—LOW FREQUENCY INDUCTION (LFI)
Application Guide to the LFI Code
First published by Telecom Australia and ESAA 1981.
Reprinted 1984.
Reset and redesignated SAA HB102—1997 (CJC 6).
Incorporating:
Amdt 1—1998
PUBLISHED BY STANDARDS AUSTRALIA
(STANDARDS ASSOCIATION OF AUSTRALIA)
1 THE CRESCENT, HOMEBUSH, NSW 2140
ISBN 0 7337 1467 6
4
PREFACE
The publication APPLICATION GUIDE for THE LOW FREQUENCY INDUCTION CODE was prepared jointly by the Central Joint Committee for the Co-ordination of Power and Telecommunications Systems (CJC) at the direction of the then Telecom Australia and the Electricity Supply Association of Australia (ESAA) and adopted in November 1981. It was reprinted in November 1984.
In 1997, Standards Australia agreed to reset, republish and distribute the Application Guide, making the following changes:
(i) The title has been rearranged to fit in with a Series of publications on coordination.
(ii) The term ‘Electricity Utility’ has been used in place of ‘Power Authority’, in recognition of recent organizational changes in the Electricity Supply Industry.
(iii) Telstra, the trading name of Telstra Corporation, has been used in place of Telecom Australia.
(iv) The flow diagram (Figure 4) has been rearranged.
This publication introduces no substantive change from the earlier edition. Accordingly that edition may continue to be used in parallel with this edition. However, Telstra and member bodies of ESAA are not bound to accept the contents of this Guide in their work practices or procedures. It is acknowledged that practices different from those described might be equally satisfactory depending on site circumstances.
This publication was prepared under the authority of Standards Australia Committee ET/7, Coordinating Committee for Power and Telecommunications (CCPT), the successor to the Central Joint Committee for the Co-ordination of Power and Telecommunications Systems (CJC), and is one of a Series dealing with technical aspects of coordination which when complete will comprise:
| CJC 1 | Joint Use of Poles: The placement on poles of power lines and paired cable telecommunications lines (SAA HB87—1997) |
| CJC 2 | Unbalanced High Voltage Power Lines: Code of practice for the mitigation of noise induced into paired cable telecommunications lines from unbalanced high voltage power lines (SAA HB88—1997) |
| CJC 3 | Unbalanced High Voltage Power Lines: Application Guide to the Code CJC 2 for the mitigation of noise induced into telecommunications lines (to be SAA HB89) |
| CJC 4 | Coordination of power and telecommunications: Manual for the establishment of safe work practices and the minimisation of operational interference between power systems and paired cable telecommunications systems (to be SAA HB100) |
| CJC 5 | Coordination of power and telecommunications—Low Frequency Induction (LFI): Code of practice for the mitigation of hazardous voltages induced into telecommunications lines (SAA HB101—1997) |
| CJC 6 | Coordination of power and telecommunications—Low Frequency Induction (LFI): Application Guide to the LFI Code (SAA HB102—1997) (this publication) |
| CJC 7 | Coordination of power and telecommunications—Crossings Code: The arrangement of overhead power and telecommunications lines, pole stay wires, and suspension wires (SAA HB103—1997) |
5
CONTENTS
Page
| SECTION 1 | INTRODUCTION | 1 |
| SECTION 2 | MECHANISM OF LOW FREQUENCY INDUCTION AND CALCULATION OF INDUCED VOLTAGES | 2 |
| SECTION 3 | PROCEDURES FOR MAKING CALCULATIONS AND DETERMINING BEST ENGINEERING SOLUTION | 5 |
| 3.1 | Calculation Procedure | 5 |
| 3.2 | Selection of Appropriate Induced Voltage Limit | 7 |
| 3.3 | Some Factors Considered by the Electricity Utility in Selection of Power Line Categories | 7 |
| SECTION 4 | EVALUATION OF FACTORS FOR CALCULATING INDUCED LONGITUDINAL VOLTAGES | 10 |
| 4.1 | Earth Fault Currents | 10 |
| 4.1.1 | Factors Affecting Fault Currents | 10 |
| 4.1.2 | Calculations of Fault Currents | 11 |
| 4.2 | Mutual and Self Impedances | 14 |
| 4.2.1 | Formulas and Nomogram for Calculations | 14 |
| 4.2.2 | Selection of Earth Resistivity Values | 15 |
| 4.3 | Shielding Factors | 16 |
| 4.3.1 | Fundamental Principles | 16 |
| 4.3.2 | Shielding Factors Relating to Power Lines and Power Cables | 18 |
| 4.3.3 | Shielding Factors Relating to Telephone Lines | 19 |
| 4.3.4 | Shielding by Adjacent Conductors | 20 |
| 4.3.5 | Shielding by Cable Sheaths | 20 |
| 4.3.6 | Shielding by Magnetic Loading | 20 |
| 4.3.7 | Shielding by Multiple Telecommunication Cables | 21 |
| 4.3.8 | Shielding by Environmental Metallic Conductors | 21 |
| 4.3.9 | Shielding by Earthing Spare Cable Pairs | 22 |
| 4.3.10 | Latent Shielding | 22 |
| 4.4 | Overvoltage Protection by Gas-Filled Protectors | 23 |
| 4.5 | Length of Exposure and Separation | 25 |
| 4.5.1 | General | 25 |
| 4.5.2 | Zone of Exposure for which Calculations may not be Required | 25 |
| 4.5.3 | Examples Where Calculations are Required | 26 |
| 4.5.4 | Summation of Exposure Sections | 26 |
| 4.5.5 | General Case | 27 |
6
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