标准信息
STANDARD INFORMATION- 标准编号
- nzecp35_1993
- 所属分类
- 其他国外标准与工程资料
- 文件语言
- 英语
- 文件格式
- 文件页数
- 6 页
- 文件大小
- 83 KB
· 更新:
标准简介
OVERVIEW中文简介
标准 nzecp35_1993 的预览内容
English summary
Preview of standard nzecp35_1993
以上为根据文件整理的内容简介。
标准内容预览
DOCUMENT PREVIEW| 6.6 | EARTHING OF FITTINGS OTHER THAN AT DISTRIBUTION CENTRES | 16 |
| 6.7 | EARTHING CONNECTIONS | 17 |
| 6.8 | LOW VOLTAGE EARTHING CONDUCTORS ASSOCIATED WITH LV SYSTEM | 17 |
| 6.9 | CONNECTIONS TO EARTHING ELECTRODES | 18 |
6
NZECP:35 1993
NEW ZEALAND ELECTRICAL CODE OF PRACTICE
for
POWER SYSTEMS EARTHING
Issued by the Office of
The Chief Electrical Inspector,
Energy and Resources Division, Ministry of Commerce
2
THE ELECTRICITY ACT 1992
APPROVAL OF ELECTRICAL CODE OF PRACTICE
FOR
POWER SYSTEMS EARTHING
Pursuant to Section 36 of the Electricity Act 1992 ("the Act")
On the 1st day of February 1993, the Secretary of Commerce issued the Electrical Code of Practice for Power Systems Earthing ("the Code")
On the 4th day of February 1993, pursuant to Section 38 of the Act the Secretary published in the Gazette a notice of intention to apply to me for approval of the code, and there has been consultations with such persons (or their representatives) as will be affected by the Code and they have had the opportunity to consider possible effects and comment on those effects.
I have considered the comments concerning those effects and where necessary amendments were made to the Code.
Therefore Pursuant to Section 38 of the Act, I, John Luxton, Minister of Energy, have this day approved the Code as attached to this approval, which Code shall come into force on the 1st day of April 1993.
Dated this 18th day of March 1993.
John Luxton
Minister of Energy.
3
COMMITTEE REPRESENTATION
This Code of Practice for Power Systems Earthing was prepared by the Ministry of Commerce, Chief Electrical Inspector’s Office.
Represented on the working party which was responsible for the preparation of this Code of Practice were the following:
- The Electrical Supply Engineers’ Association
- Electricity Corporation
- Trans Power
- Ministry of Commerce
- Telecom
ACKNOWLEDGEMENT
The source material for this Code was derived from the following documentation, ESA (Australia) Section 12 of the Guidelines for Design and Maintenance of Overhead Distribution and Transmission Lines C(b)l 1991, IEEE Guide for Safety in AC Substation Grounding (ANSI/IEEE 80) 1986, Earthing Handbook issued by the Electricity Authority of NSW 1975.
REVIEW
This Code of Practice will be revised as occasions arise. Suggestions for improvement of this Code are welcome. They should be sent to the Chief Electrical Inspector’s Office, Ministry of Commerce, P O Box 1473, WELLINGTON.
4
CONTENTS
| Page | |
|---|---|
| INTRODUCTION | 1 |
| SECTION 1 | |
| SCOPE, PURPOSE, INTERPRETATIONS, GLOSSARY AND NUMBERING | |
| 1.1 SCOPE | 2 |
| 1.2 INTERPRETATIONS | 2 |
| 1.3 GLOSSARY OF ABBREVIATIONS USED IN THIS CODE | 4 |
| 1.4 NUMBERING SYSTEM OF THIS CODE | 4 |
| SECTION 2 | |
| GENERAL REQUIREMENTS | |
| 2.2 PERFORMANCE OF EARTHING SYSTEMS | 7 |
| 2.3 DESIGN, SELECTION AND INSTALLATION | 7 |
| 2.4 EARTH ELECTRODES | 7 |
| 2.5 TESTING AND INSPECTION | 8 |
| 2.6 PERMISSIBLE SHOCK CURRENT AND STEP AND TOUCH VOLTAGES | 9 |
| SECTION 3 | |
| CURRENT LIMITATION | |
| 3.1 LIMITATION OF SHOCK CURRENTS | 10 |
| SECTION 4 | |
| PERMISSIBLE STEP AND TOUCH VOLTAGES | |
| 4.1 PERMISSIBLE TOUCH VOLTAGES | 11 |
| 4.2 PERMISSIBLE STEP VOLTAGES | 11 |
| 4.3 TRANSFERRED POTENTIALS | 11 |
| SECTION 5 | |
| HIGH VOLTAGE STATIONS WITH EARTH GRIDS | |
| 5.2 POWER SYSTEM NEUTRAL EARTH | 13 |
| 5.3 DESIGN OF EARTHING SYSTEMS | 13 |
| 5.4 TRANSFERRED EARTH POTENTIAL RISE | 14 |
| SECTION 6 | |
| DISTRIBUTION SYSTEMS | |
| 6.2 DISTRIBUTION EARTHING SYSTEM | 15 |
| 6.3 CONNECTION OF NEUTRAL TO EARTH | 15 |
| 6.4 IMPEDANCE OF EARTH FAULT CURRENT PATH | 16 |
| 6.5 EARTHING CONNECTIONS AND EARTHING AT DISTRIBUTION CENTRES | 16 |
| 6.6 | EARTHING OF FITTINGS OTHER THAN AT DISTRIBUTION CENTRES | 16 |
| 6.7 | EARTHING CONNECTIONS | 17 |
| 6.8 | LOW VOLTAGE EARTHING CONDUCTORS ASSOCIATED WITH LV SYSTEM | 17 |
| 6.9 | CONNECTIONS TO EARTHING ELECTRODES | 18 |
6
预览内容由文件识别整理,表格、公式及文字请以原始文件为准。
原文图片预览
PAGE IMAGES下载标准文件
nzecp35_1993
英语 · PDF · 6 页 · 83 KB



