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GB/T 17215.231-2021: Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 31: Product safety requirements and tests
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Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 31: Product safety requirements and tests
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GB/T 17215.231-2021
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Basic data | Standard ID | GB/T 17215.231-2021 (GB/T17215.231-2021) | | Description (Translated English) | Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 31: Product safety requirements and tests | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N22 | | Word Count Estimation | 171,165 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 17215.231-2021: Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 31: Product safety requirements and tests
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 31.Product safety requirements and tests
ICS 17.220.20
CCSN22
National Standards of People's Republic of China
General requirements, tests and tests for electrical measuring equipment (AC)
Conditions Part 31.Product safety requirements and tests
(IEC 62052-31.2015, IDT)
Released on 2021-10-11
2022-05-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Preface Ⅴ
Introduction Ⅶ
1 Scope and objects 1
1.1 Scope 1
1.2 Object 2
1.3 Verification 2
1.4 Environmental conditions 2
2 Normative references 3
3 Terms and definitions 4
3.1 Equipment and equipment status 5
3.2 Parts and accessories 5
3.3 Quantity 7
3.4 Test 9
3.5 Security 9
3.6 Insulation 12
3.7 Terms related to switch of metering equipment 15
4 Experiment 17
4.1 Summary 17
4.2 Type test-test sequence 17
4.3 Reference test conditions 17
4.4 Test under single fault condition 21
5 Information and marking requirements 23
5.1 Overview 23
5.2 Labels, symbols and signs 26
5.3 Information for selection 28
5.4 Installation and commissioning information 29
5.5 Use Information 33
5.6 Maintenance Information 33
6 Protection against electric shock 34
6.1 General requirements 34
6.2 Determination of accessible parts 34
6.3 Limits of accessible parts 36
6.4 Basic protective measures (prevent direct contact) 38
6.5 Additional protective measures under single fault conditions (to prevent indirect contact) 39
6.6 Connection with external circuits 44
6.7 Insulation requirements 44
6.8 Insulation requirements between circuits and components 64
6.9 Structural requirements for protection against electric shock 67
6.10 Safety-related electrical tests 75
7 Protection against mechanical hazards 94
7.1 Overview 94
7.2 Sharp edges 94
7.3 Protection for lifting and handling 94
8 Resistance to mechanical stress 95
8.1 Overview 95
8.2 Spring hammer test 95
9 Prevent the spread of flame 95
9.1 Overview 95
9.2 Elimination and reduction of ignition sources in equipment 96
9.3 Once it occurs, contain the flame in the equipment 96
9.4 Energy Limited Circuit 97
9.5 Overcurrent protection 98
10 Temperature limits and heat resistance of equipment 98
10.1 Surface temperature limits to prevent burns 98
10.2 Temperature limits of terminals 99
10.3 Temperature of internal parts 100
10.4 Temperature test 101
10.5 Heat resistance 102
11 Prevent the intrusion of dust and water 103
12 Protection against explosion and implosion of released gases and substances-battery and battery charging 104
13 Components and components 105
13.1 Overview 105
13.2 Power transformers tested outside the equipment 106
13.3 Printed circuit boards 106
13.4 Bridging insulating elements 107
13.5 Circuits or components used as transient overvoltage limiting devices 107
14 Hazards arising from use-reasonably foreseeable misuse 107
15 Risk Assessment 107
Appendix A (Normative) Circuits for Measuring Contact Current 109
Appendix B (informative) Examples of insulation between parts 112
Appendix C (informative) Examples of direct access energy meters equipped with power control switches and load control switches 117
Appendix D (Normative) Test circuit diagram for withstanding long-term overvoltage test 119
Appendix E (Normative) Circuit diagram of short circuit test of current circuit directly connected to electric energy meter 120
Appendix F (Informative) Examples of Voltage Test 122
Appendix G (Normative) Additional AC voltage test for electromechanical energy meters 126
Appendix H (Normative) Test equipment for cable tensile and bending tests 127
Appendix I (Informative) Routine Test 128
Appendix J (informative) Examples of battery protection 129
Appendix K (informative) The basis for specifying overvoltage category III 130
Appendix L (informative) An overview of safety aspects 132
Appendix M (Informative) Term Index 148
Appendix NA (informative) IEC /TC13's interpretation of certain clauses of IEC 62052-31.2015 153
Appendix NB (informative) Editorial amendments to IEC 62052-31.2015 157
References 160
Figure 1 Measurement through the opening of the outer cover 35
Figure 2 The maximum duration of short-term accessible voltage under a single fault condition [see 6.3.3a)] 37
Figure 3 The relationship between capacitance and voltage under normal conditions and single fault conditions [see (6.3.2c) and 6.3.3c)] 38
Figure 4 Configuration of acceptable means of protection against electric shock 40
Figure 5 Example of terminal screw set 42
Figure 6 Conductor distance on an interface between two layers 52
Figure 7 The distance between two adjacent conductors along an inner interface 52
Figure 8 The distance between adjacent conductors located between the same two layers 53
Figure 9 Example of reproducing peak voltage 62
Figure 10 Flow chart of electrical test related to safety 76
Figure 11 Flow chart illustrating requirements to prevent flame spread 96
Figure 12 Ball pressure test device 103
Figure 13 13.1 a), b), c) and d) compliance flow chart 106
Figure A.1 AC and DC measurement circuit below 1MHz frequency 109
Figure A.2 A measuring circuit for sinusoidal AC and DC with a frequency not exceeding 100 Hz 110
Figure A.3 Circuit for measuring electric burn current 110
Figure A.4 Current measurement circuit for wet contact 111
Figure B.1 Insulation between parts---Example 1 112
Figure B.2 Insulation between parts --- Example 2 113
Figure B.3 Insulation between parts --- Example 3 114
Figure B.4 Insulation between parts --- Example 4 115
Figure B.5 Insulation between parts --- Example 5 116
Figure C.1 Single-phase two-wire electric energy meter with UC2SCS and 25ALCS 117
Figure C.2 Three-phase four-wire electric energy meter with UC2UCS and 2A auxiliary control switch 118
Figure D.1 The circuit of a three-phase four-wire electric energy meter that simulates long-term overvoltage (L3 short-circuits to the neutral line) 119
Figure D.2 Voltage on the tested energy meter 119
Figure E.1 Test circuit for verifying the short-term withstand current test on a current circuit with or without a power control switch 120
Figure E.2 Example of AC single-phase short-circuit load test record in the case of unipolar equipment 121
Figure F.1 Voltage test arrangement. Directly connected three-phase four-wire electric energy meter with power control switch and load control switch 122
Figure F.2 Test arrangement for voltage test. three-phase four-wire connected to the electric energy meter through a transformer 124
Figure H.1 Test equipment for cable bending and tensile testing (see 6.9.7.3) 127
Figure J.1 Protection of non-rechargeable batteries 129
Figure J.2 Protection of rechargeable batteries 129
Table 1 Test copper conductors for current and switch terminals 19
Table 2 Information requirements 24
Table 3 Symbols of IEC 60417 and ISO 7000 that can be used on measuring equipment 27
Table 4 Tightening torque of the fastening screw set 42
Table 5 Multiplying factor 45 for electrical clearance at altitudes below 5000m
Table 6 An overview of prescribed insulation requirements and test clauses 47
Table 7 Nominal voltage/rated voltage and rated impulse voltage 48
Table 8 Electric clearance of grid power circuit 49
Table 9 Creepage distance of grid power circuit 50
Table 10 Test voltage of solid insulation in power supply circuit 51
Table 11 Test voltage of the long-term stress test of the solid insulation in the power supply circuit of the power grid 51
Table 12 The minimum thickness or distance of solid insulation 53
Table 13 Clearance and test voltage of non-grid power circuit generated from grid power circuit of overvoltage category Ⅲ 54
Table 14 Creepage distance of non-grid power circuit 55
Table 15 Minimum distance or thickness (see 6.7.4.4.2~6.7.4.4.4) 57
Table 16 Calculated clearance value of 6.7.5.2 59
Table 17 Test voltage value based on clearance 60
Table 18 Basic insulation gaps in circuits that reproduce peak voltage 62
Table 19 Insulation classification of non-grid power circuits 65
Table 20 Insulation requirements between any two circuits 66
Table 21 Overview of current circuit requirements for direct access to electric energy meters without SCS 72
Table 22 Overview of current circuit requirements for direct-connected energy meters with SCS 73
Table 23 Overview of requirements for load control switches 74
Table 24 Correction factor 79 for clearance test voltage according to the altitude of the test site
Table 25 AC voltage test 83
Table 26 Test sequence and sampling plan of power control switch 86
Table 27 Power factor range of test circuit 89
Table 28 Test sequence and sampling plan of load control switch 92
Table 29 Limits of the maximum possible current 98
Table 30 Values of overcurrent protection device 98
Table 31 Surface temperature limits under normal conditions 99
Table 32 Temperature limits of terminals 100
Table 33 Maximum total temperature measured for internal materials and components 100
Table G.1 AC voltage test of electromechanical watt-hour meter 126
Table H.1 Test value of bending and pullout test of round copper conductor 127
Table L.1 Safety overview 132
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document is part 31 of GB/T 17215.2 "General Requirements, Tests and Test Conditions for Electrical Measuring Equipment (AC)". GB/T 17215.2
The following parts have been released.
---Part 11.Measuring equipment;
---Part 21.Rates and load control equipment;
---Part 31.Product safety requirements and tests.
The translation method used in this document is equivalent to IEC 62052-31.2015 General Requirements, Tests and Test Conditions for Electrical Measuring Equipment (AC)
Part 31.Product Safety Requirements and Testing.
The Chinese documents that have consistent correspondence with the normatively cited international documents in this document are as follows.
---GB/T 1633-2000 Thermoplastics Determination of Vicat Softening Temperature (VST) (ISO 306.1994, IDT);
---GB/T 1634.2-2019 Determination of plastic load deformation temperature Part 2.Plastics and hard rubber (ISO 75-2.
2013, MOD);
---GB/T 2423.3-2016 Environmental Test Part 2.Test Method Test Cab. Constant Humidity Test (IEC 60068-2-
78.2012, IDT);
---GB/T 2423.55-2006 Environmental testing of electrical and electronic products Part 2.Environmental testing test Eh. Hammer test
(IEC 60068-2-75.1997, IDT);
---GB/T 2893.1-2013 Graphical symbols, safety colors and safety signs Part 1.Design of safety signs and safety signs
Accounting principles (ISO 3864-1.2011, MOD);
---GB/T 4207-2012 Solid insulating material tracking resistance index and comparative tracking index determination method (IEC 60112.
2009, IDT);
---GB 4943.1-2011 Information Technology Equipment Safety Part 1.General Requirements (IEC 60950-1.2005, MOD);
---GB/T 5169.11-2017 Fire hazard test for electrical and electronic products Part 11.Glow wire/hot wire basic test method
Glow wire flammability test method (GWEPT) of finished products (IEC 60695-2-11.2014, IDT);
---GB/T 5169.16-2017 Fire hazard test of electric and electronic products Part 16.Test flame 50W level and vertical
Direct flame test method (IEC 60695-11-10.2013, IDT);
---GB/T 5169.21-2017 Fire hazard test of electric and electronic products Part 21.Abnormal hot ball pressure test method
(IEC 60695-10-2.2014, IDT);
---GB/T 5465.1-2009 Graphical symbols for electrical equipment Part 1.Overview and classification (IEC 60417Database.
2007-01, MOD);
---GB/T 11021-2014 Electrical insulation heat resistance and its representation method (IEC 60085.2007, IDT);
---GB/T 13539.3-2017 Low-voltage fuses Part 3.Supplementary requirements for fuses used by unskilled personnel (mainly
(Fuses for household and similar purposes) Examples of standardized fuse systems A to F (IEC 60269-3.2013, IDT);
---GB/T 16273.1-2008 Graphical symbols for equipment Part 1.General symbols (ISO 7000.2004, NEQ);
---GB/T 17215.352-2009 Particular requirements for alternating current measuring equipment Part 52.Symbols (IEC 62053-52.
2005, IDT).
The following editorial changes have been made to this document.
---Added informative appendix NA "IEC /TC13's interpretation of certain clauses of IEC 62052-31.2015";
---Informative appendix NB "Editorial amendments to IEC 62052-31.2015" has been added.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents.
This document was proposed by China Machinery Industry Federation.
This document is under the jurisdiction of the National Electrical Instrumentation Standardization Technical Committee (SAC/TC104).
Drafting organizations of this document. Shanghai IFTE Electronic Technology Co., Ltd., Harbin Institute of Electrical and Instrumentation Co., Ltd., Wuxing Technology (Shenzhen)
Shenzhen) Co., Ltd., Yantai Oriental Weston Electric Co., Ltd., Shenzhen Kelu Electronic Technology Co., Ltd., Shenzhen Jiangji Industrial Co., Ltd.
Company, Jiangsu Linyang Energy Co., Ltd., State Grid Jibei Electric Power Co., Ltd. Measurement Center, Zhangzhou Keneng Electric Co., Ltd., Shanghai Computer
Measurement Technology Research Institute, Zhejiang Institute of Metrology, State Grid Sichuan Electric Power Research Institute, Zhejiang Chint Instruments
Co., Ltd., Zhejiang Hengye Electronics Co., Ltd., Ningbo Samsung Medical Electric Co., Ltd., Wuhan Shengfan Electronics Co., Ltd.,
Zhejiang Tianzheng Electric Co., Ltd., Ante Instrument Group Co., Ltd., Henan Xuji Instrument Co., Ltd., Guangdong Electric Power Research Institute Energy Technology Co., Ltd.
Limited Liability Company, Hangzhou Haixing Power Technology Co., Ltd., Wasion Group Co., Ltd., Qingdao Qiancheng Technology Co., Ltd., Jiangyin Chang
Instrument Group Co., Ltd., Shijiazhuang Kelin Electric Co., Ltd., Guangdong Haoningda Industrial Co., Ltd., Jiangsu Huapeng Intelligent Instrument Technology Co., Ltd.
Co., Ltd., China Southern Power Grid Research Institute, Holley Technology Co., Ltd., State Grid Jiangsu Electric Power Co., Ltd. Marketing Service Center, Nanjing
Bocanan Intelligent Electric Co., Ltd., Zhejiang Chentai Technology Co., Ltd., Hangzhou Xili Intelligent Technology Co., Ltd., Jiangyin Zhong
He Power Meter Co., Ltd., Shenzhen Xianxing Electric Technology Co., Ltd.
The main drafters of this document. Xue Dejin, Li Wanhong, Luo Yurong, Wang Wenguo, Zhang Dengqing, Sun Shijie, Yang Jintu, Ju Hanji, Xu Huifeng, Chen Wenxin,
Shi Leibing, Zhou Shaoyuan, Hou Qingquan, Qu Ming, Jiang Zisong, Hu Meng, Hu Zhigang, Li Zhongze, Xu Chugong, Zhang Zongji, Liu Keke, Du Zhengzhou, Li Xiangfeng,
Li Shuangquan, Zhao Yantao, Zhou Yuejiang, Zhang Xiaodong, Zhang Quan, Zhou Jun, Fang Yu, Xiao Yong, Zeng Shitu, Tian Zhengqi, Jiang Weiping, Wang Taofeng, Zhu Yongfeng, Wang Gang,
Fei Guihuai.
Introduction
The current product standards formulated by IEC /TC13 include a series of safety requirements, test methods and test conditions. However, the standard does not
There is no clear distinction between safety performance requirements and general performance requirements, and the following provisions of 5.2.3 in IEC Guide104.2010 cannot be met.
"Safety aspects and performance aspects should not be included in the same publication. This is because it is difficult to assess compliance with safety requirements separately.
In particular, if they are included in the same publication for some reason, the safety and performance aspects should be clearly distinguished from each other.
point. If performance criteria with safety implications are considered to be safety aspects, they should be clarified in the publication. "
In addition, some important aspects of product safety, such as safety requirements under single fault conditions, are not included in IEC 62052 and
In the.2003 version of the IEC 62053 series of standards.
In order to eliminate any ambiguity caused by the lack of comprehensive product safety standards in the product field of TC13, IEC /TC13
The specific safety requirements and basic safety standards of electric energy metering and control equipment, as well as multi-professional shared safety standards, are suitable for electric energy metering and
The requirements, test methods and test conditions of the control equipment are specifically quoted to form a complete and clear product safety requirements and tests
Methods, test conditions and standards, and reorganize the product standards for electric energy measurement and control equipment to form a coordinated standard system.
The purpose of the international product safety standard IEC 62052-31.2015 is as follows.
---Specify the relevant basic safety publications and make them include relevant requirements, test methods and test conditions, from
And make it more applicable;
--- When applicable, make specific references to relevant safety publications shared by multiple disciplines, and include relevant requirements, test methods
Method and test conditions;
---Considering the latest developments in technology, it is used in the design and manufacture of electric energy measurement and control equipment;
---In the product field of IEC /TC13, eliminate any ambiguity caused by the lack of comprehensive product safety standards;
---Develop a unified product safety method that runs through the international metrology industry.
GB/T 17215.2 "General requirements, test and test conditions for electrical measurement equipment (AC)" is the universality and
Basic standards. It is currently planned to consist of three parts.
---Part 11.Measuring equipment. The purpose is to specify the general mechanical and electrical requirements and test strips for the type test of AC electric energy meters
Pieces, functions, logos, etc.
---Part 21.Rates and load control equipment. The purpose is to specify newly manufactured, indoor use rates and load control equipment
General requirements for type testing.
---Part 31.Product safety requirements and tests. The purpose is to specify product safety requirements for electrical energy measurement and control equipment.
As a product safety standard, this document takes precedence over GB 4793.1 Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use
Part 1.General Requirements. The latter is a safety standard shared by multiple disciplines.
In order to be able to clearly understand all the requirements of the product safety standards for AC energy metering equipment, this document gives an informative
Appendix L "Overview of Security Aspects".
Since IEC 62052-31.2015 is the first product safety standard for electric energy meters, some content in the document is not very
It is clear and contains editorial errors. The WG11 of IEC /TC13 issued a supplementary document in.2019 (IEC 62052-31.2015/
ISH1.2019ED1), explaining some terms. In order to better understand and use this document, this document is regarded as an informative attachment.
The records are provided to standard users, see Appendix NA. At the same time, make corresponding amendments for editorial errors, see Appendix NB.
General requirements, tests and tests for electrical measuring equipment (AC)
Conditions Part 31.Product safety requirements and tests
1 Scope and objects
1.1 Scope
This document specifies the product safety requirements for electrical energy measurement and control equipment.
Note 1.See related standards for other requirements.
This document is applicable to newly manufactured power grids designed to measure and control 50Hz or 60Hz and the voltage does not exceed 600V power grid
Metering equipment. All functional units of the equipment, including additional modules, are enclosed in a single shell or form a single entity.
Note 2.The voltage mentioned above is the voltage of the phase line to the neutral line derived from the nominal voltage, see Table 7.
This document also applies to metering equipment that contains power control switches and load control switches, but those switches are only electromechanical switches.
Note 3.See Chapter 13 for components and assemblies.
When the device is designed to be installed in a dedicated matching socket, then the requirements for the device only apply when it is installed in a dedicated socket.
It should be tested when the equipment is installed in a dedicated matching socket. However, the requirements for sockets
And the requirements for plugging or unplugging the device into or out of the socket are outside the scope of this document.
This document also applies to auxiliary input and output circuits.
Note 4.Examples are pulse input and output circuits, control input and output circuits, and meter data exchange circuits.
This document distinguishes.
---Electromechanical electric energy meter, static electric energy meter and tariff and load control equipment;
--- Directly connected to the electric energy meter, connected to the electric energy meter through the current transformer, and connected to the electric energy meter through the current and voltage transformer;
---Class I protective equipment and Class II protective equipment;
---Wall or cabinet installation equipment, rack installation equipment and panel installation equipment;
---Indoor use equipment and outdoor use equipment.
Equipment used with energy measurement and control equipment may need to meet additional safety requirements. See Chapter 13.
Note 5.Examples are telecommunications modems and user information units.
This document does not apply to.
---Equipment where the voltage of the phase line to the neutral line derived from the nominal voltage exceeds 600V;
---Portable electric energy meter;
Note 6.Portable energy meters are non-permanently connected energy meters.
---Laboratory and mobile electric energy meter test equipment;
---Reference standard table.
The safety requirements of this document are based on the following assumptions.
---The metering equipment has been installed correctly.
---Electric energy metering equipment is usually used by unskilled individuals, including meter readers and consumers of electrical energy. In many cases, the equipment
It is freely accessible after installation. Without removing the seal, the terminal cover cannot be removed without tools, and the case cannot be opened.
---During normal use, all terminal covers, meter covers or shields that provide protection to prevent contact with dangerous live parts are in
In situ.
---For the installation, configuration, maintenance and repair of the electric energy meter, it may be necessary to remove the terminal cover, the case or the shielding fence (or part of it), thereby
Make dangerous live parts accessible. These jobs are carried out by skilled craftsmen who have received proper training,
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