GB 50169-2016 PDF English
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| GB 50169-2016 | English | 165 |
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Code for construction and acceptance of grounding connection electric equipment installation engineering
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Code for construction and acceptance of grounding connection electric equipment installation engineering
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| GB 50169-1992 | English | 639 |
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Code for construction and acceptance of earthed device electric equipment installation engineering
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GB 50169-2016: Code for construction and acceptance of grounding connection electric equipment installation engineering
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB50169-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB 50169-2016
Code for construction and acceptance of grounding
connection electric equipment installation engineering
Issued on. AUGUST 18, 2016
Implemented on. APRIL 1, 2017
Jointly issued by. Ministry of Housing and Urban-Rural Development of
the PRC;
General Administration of Quality Supervision,
Inspection and Quarantine of the PRC.
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
Code for construction and acceptance of grounding
connection electric equipment installation engineering
Chief editing department. China Electricity Council
Approved by. Ministry of Housing and Urban-Rural
Development of the PRC
Implemented on. APRIL 1, 2017
2016 Beijing
Notice of Ministry of Housing and Urban-Rural
Development of the PRC
No.1260
Notice of Ministry of Housing and Urban-Rural Development of the
PRC on the Issuance of National Standard Code for Construction
and Acceptance of Grounding Connection Electric Equipment
Installation Engineering
The “Code for construction and acceptance of grounding connection electric
equipment installation engineering” is now approved as the national standard,
numbered GB 50169-2016, and will be implemented from April 1, 2017.The
Articles 3.0.4, 4.1.8, 4.2.9 are mandatory provisions and must be strictly
enforced. The previous national standard GB 50169-2006 “Code for
construction and acceptance of grounding connection electric equipment
installation engineering” is also abolished at the same time.
This Standard is published by China Planning Press under the organization of
the Ministry’s standard rating research institute.
Ministry of Housing and Urban-Rural Development of the PRC
August 18, 2016
Foreword
In accordance with the requirements of “Notice on Issuance of Development
and Revision Plans for 2013 Engineering Construction Standard Code” (No.6
[2013], Construction Standard) of the Ministry of Housing and Urban-Rural
Development, by China Electric Power Research Institute in conjunction with
relevant organizations, on the basis of GB 50169-2006 “Code for construction
and acceptance of grounding connection electric equipment installation
engineering”, this Code is revised.
In the revision process of this Code, the revision team has extensively
investigated and studied, carefully summed up practical experiences,
extensively asked for opinions and discussed and revised many times, and
finally reviewed and finalized.
This Code is divided into 5 chapters. The main contents include. general
provisions, terms, basic requirements, grounding of electric equipment, and
engineering succession and acceptance.
Compared with the previous code, this Code adds the following.
1.Basic requirements;
2.Reducing resistance of grounding connection;
3.Grounding of wind turbines and photovoltaic power plant;
4.Grounding of relaying protection and security automatic equipment;
5.Grounding against lightning induction and static electricity.
The provisions of this Code in bold type are mandatory and must be strictly
enforced.
The Ministry of Housing and Urban-Rural Development is responsible for the
management of this Code and the interpretation of mandatory provisions. China
Electricity Council is responsible for day-to-day management. China Electric
Power Research Institute is responsible for the interpretation of specific
technical content. In the implementation process of this Code, it is hoped that
all organizations will combine engineering practice, earnestly sum up
experience, pay attention to the accumulation of information. If it is found that it
needs to be modified or supplemented, please send comments and
suggestions to China Electric Power Research Institute (address. No.33 South
Binhe Road, Xicheng District, Beijing; postal code. 100055) for future revision.
The chief editing organizations, participating editing organizations, main
drafters, and main reviewers of this Code.
Chief editing organizations. China Electricity Council
China Electric Power Research Institute
Participating editing
organizations.
State Grid Smart Grid Research Institute
CSG Guangdong Power Transmission and
Transformation Engineering Company
State Grid Shaanxi Electric Power Research
Institute
Anhui Electric Power Construction
Engineering Quality Supervision Central
Station
Gezhouba Group Electric Power Co., Ltd.
China Energy Engineering Group Tianjin
Electric Power Construction Co., Ltd.
Beijing Shuangyuan Engineering
Consultation & Supervision Co., Ltd.
North China Power Engineering Co., Ltd.
Beijing Allday Science and Technology Co.,
Ltd.
Jiang Su Jin He Yi Composite New Material
Co., Ltd.
Main drafters. Chen Xin, Han Yu, Jing Jin, He Guanheng,
Chen Changcai, Wang Sen, Liu Shihua, Ge
Zhanyu, Zhou Weixin, Xu Chunli, Ma Guang,
Wang Wei, Sun Yongchun, Zhu Zhixiang
Main reviewers. Chen Fayu, Xu Jun, Du Shuchun, Li Qian,
Fang Jing, Yan Guozeng, Liao Guanghong,
Wei Guozhu, Wang Yuming, Long Qingzhi,
Wang Guomin, Cheng Yuntang, Gu Wei
Table of Contents
1 General provisions... 7
2 Terms... 8
3 Basic requirements... 10
4 Grounding of electric equipment... 12
4.1 Selection of grounding connection... 12
4.2 Laying of grounding connection... 15
4.3 Join of grounding electrode (conductor)... 19
4.4 Reducing resistance of grounding connection... 22
4.5 Grounding of wind turbines and photovoltaic power station... 23
4.6 Grounding of air-termination system... 25
4.7 Grounding of transmission poles and towers... 26
4.8 Grounding of main control building, dispatching building and communication
station... 28
4.9 Grounding of relaying protection and security automatic equipment... 30
4.10 Grounding of metal jacket of power cable... 32
4.11 Grounding of distribution electric equipment... 32
4.12 Grounding of structures electric equipment... 33
4.13 Grounding of portable and mobile appliances... 34
4.14 Grounding against lightning induction and static electricity... 35
5 Engineering succession and acceptance... 37
Explanation of wording in this code... 38
Lists of quoted standards... 39
1 General provisions
1.0.1 To ensure the construction quality of grounding connection electric
equipment installation engineering, promote the improvement of technical level
of engineering construction, and to ensure the safe operation of grounding
connection, this Code is developed.
1.0.2 This Code is applicable to the construction and acceptance of grounding
connection electric equipment installation engineering, and not to the
construction and acceptance of high voltage DC power transmission grounding
electrode.
1.0.3 The construction and acceptance of grounding connection shall, in
addition to complying with this Code, comply with the current relevant national
standards.
2 Terms
2.0.1 Grounding electrode
Metal conductors buried in the ground and in direct contact with the earth are
called grounding electrodes. They are classified into horizontal grounding
electrodes and vertical grounding electrodes.
2.0.2 Natural grounding electrode
Various metal components, metal well pipes, foundations of reinforced concrete
buildings, metal pipelines and equipment in direct contact with the earth which
can be utilized for grounding.
2.0.3 Air-termination system
The generic term of devices for accepting lightning stroke, including lightning
rod, lightning belt, lightning conductor, lightning protection net, metal roofing,
and metal components, etc..
2.0.4 Grounding conductor
A metal conductor which is used to connect the grounding terminal of electric
equipment and air-termination system to the grounding electrode and does not
carry current under normal conditions.
2.0.5 Grounding connection
The sum of grounding electrode and grounding conductor.
2.0.6 Grounded
USE grounding conductor to connect the electric equipment, facilities,
overvoltage protective devices of power systems or structures to the grounding
electrode.
2.0.7 Grounding impedance
The impedance between a given point and a reference point of systems,
devices, or equipment at a given frequency.
2.0.8 Ground resistance
The resistive component of grounding impedance, which is power frequency
ground resistance at the power frequency.
2.0.9 Neutral line
The conductor which is electrically connected to a neutral point and can be used
for power distribution.
3 Basic requirements
3.0.1 The installation of grounding connection shall be carried out by the
engineering construction organization in accordance with the approved design
documents.
3.0.2 When adopting new techniques, new technologies, and new materials,
they shall be tested and verified with national qualification.
3.0.3 The installation of grounding connection shall be in accordance with the
construction of the construction engineering.
3.0.5 The DC system grounding connection which needs to be grounded shall
meet the following requirements.
3.0.7 The grounding connection acceptance tests including conduction test
shall be carried out after the grounding connection is constructed and before
the line overhead ground wire has not been laid to the plant (station) incoming-
outgoing line terminal pole and tower and framework. The ground resistance
shall comply with design requirements.
3.0.8 For the grounding connection in high soil resistivity area, when the ground
resistance cannot meet the requirements, the corresponding measures shall be
taken according to the design. Only after meeting the requirements, can it be
put into operation.
3.0.9 The following metal parts attached to grounded electric equipment and
production facilities may not be grounded.
4 Grounding of electric equipment
4.1 Selection of grounding connection
4.1.1 Various grounding connections utilize natural grounding electrodes
directly buried in the ground or in the water. The following natural grounding
electrodes can be utilized.
4.1.3 Grounding connections such as power plants and substations, in addition
to natural grounding electrodes, shall also be laid with a grounding grid which
consists mainly of horizontal artificial grounding electrodes. A measuring well
which separates the natural grounding electrode from the artificial grounding
electrode shall also be provided.
4.1.4 The selection of grounding connection material shall meet the following
requirements.
4.1.5 For artificial grounding electrodes of grounding connection, the conductor
cross section shall meet the requirements of thermal stability, voltage-sharing,
mechanical strength, and corrosion resistance.
4.2 Laying of grounding connection
4.2.1 The buried depth and spacing of grounding grid shall meet the design
requirements. When there is no specific regulation, the buried depth of the top
surface of grounding electrode shall not be less than 0.8m. The spacing
between horizontal grounding electrodes shall not be less than 5m. The spacing
between vertical grounding electrodes shall not be less than twice the length.
4.2.9 The grounding of electric equipment must be separately connected
to the grounding busbar or grounding grid. It is forbidden to connect two
or more electric equipment which need to be grounded in series in one
grounding conductor.
4.2.10 The grounding conductor of electric equipment of power plants and
substations shall meet the following requirements.
4.3.5 When the joining technology of grounding electrode (conductor) is
exothermic welding, the welded joint shall comply with the following
requirements.
4.3.9 The grounding of metal cable bridge shall meet the following requirements.
5 Engineering succession and acceptance
5.0.1 The acceptance of grounding connection electric equipment installation
engineering shall comply with the following requirements.
5.0.2 During succession and acceptance, the following information and
documents shall be submitted.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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