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GB/T 17215.231-2021Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 31: Product safety requirements and tests (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

October 11, 2021

Implementation date

May 1, 2022

Scope

GB/T 17215.231-2021 (Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 31: Product safety requirements and tests) is available as an English-translated PDF.

GB/T 17215.231-2021 — 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,

Document preview — GB/T 17215.231-2021

National Standard of the People's Republic of China

Classification: N 22

Issued by: State Administration for Market Regulation, China National Standardization Administration

1 Scope and objects1
1.1 Scope1
1.2 Object2
1.3 Verification2
1.4 Environmental conditions2
2 Normative references3
3 Terms and definitions4
3.1 Equipment and equipment status5
3.2 Parts and accessories5
3.3 Quantity7
3.4 Test9
3.5 Security9
3.6 Insulation12
3.7 Terms related to switch of metering equipment15
4 Experiment17
4.1 Summary17
4.2 Type test-test sequence17
4.3 Reference test conditions17
4.4 Test under single fault condition21
5 Information and marking requirements23
5.1 Overview23
5.2 Labels, symbols and signs26
5.3 Information for selection28
5.4 Installation and commissioning information29
5.5 Use Information33
5.6 Maintenance Information33
6 Protection against electric shock34
6.1 General requirements34
6.2 Determination of accessible parts34
6.3 Limits of accessible parts36
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 circuits44
6.7 Insulation requirements44
6.8 Insulation requirements between circuits and components64
6.9 Structural requirements for protection against electric shock67
6.10 Safety-related electrical tests75
7 Protection against mechanical hazards94
7.1 Overview94
7.2 Sharp edges94
7.3 Protection for lifting and handling94
8 Resistance to mechanical stress95
8.1 Overview95
8.2 Spring hammer test95
9 Prevent the spread of flame95
9.1 Overview95
9.2 Elimination and reduction of ignition sources in equipment96
9.3 Once it occurs, contain the flame in the equipment96
9.4 Energy Limited Circuit97
9.5 Overcurrent protection98
10 Temperature limits and heat resistance of equipment98
10.1 Surface temperature limits to prevent burns98
10.2 Temperature limits of terminals99
10.3 Temperature of internal parts100
10.4 Temperature test101
10.5 Heat resistance102
11 Prevent the intrusion of dust and water103
12 Protection against explosion and implosion of released gases and substances-battery and battery charging104
13 Components and components105
13.1 Overview105
13.2 Power transformers tested outside the equipment106
13.3 Printed circuit boards106
13.4 Bridging insulating elements107
13.5 Circuits or components used as transient overvoltage limiting devices107
14 Hazards arising from use-reasonably foreseeable misuse107
15 Risk Assessment107
Appendix A (Normative) Circuits for Measuring Contact Current109
Appendix B (informative) Examples of insulation between parts112
Appendix C (informative) Examples of direct access energy meters equipped with power control switches and load control switches117
Appendix D (Normative) Test circuit diagram for withstanding long-term overvoltage test119
Appendix E (Normative) Circuit diagram of short circuit test of current circuit directly connected to electric energy meter120
Appendix F (Informative) Examples of Voltage Test122
Appendix G (Normative) Additional AC voltage test for electromechanical energy meters126
Appendix H (Normative) Test equipment for cable tensile and bending tests127
Appendix I (Informative) Routine Test128
Appendix J (informative) Examples of battery protection129
Appendix K (informative) The basis for specifying overvoltage category III130
Appendix L (informative) An overview of safety aspects132
Appendix M (Informative) Term Index148
Appendix NA (informative) IEC /TC13's interpretation of certain clauses of IEC 62052-31.2015153
Appendix NB (informative) Editorial amendments to IEC 62052-31.2015157
References160
Figure 1 Measurement through the opening of the outer cover35
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 shock40
Figure 5 Example of terminal screw set42
Figure 6 Conductor distance on an interface between two layers52
Figure 7 The distance between two adjacent conductors along an inner interface52
Figure 8 The distance between adjacent conductors located between the same two layers53
Figure 9 Example of reproducing peak voltage62
Figure 10 Flow chart of electrical test related to safety76
Figure 11 Flow chart illustrating requirements to prevent flame spread96
Figure 12 Ball pressure test device103
Figure 13 13.1 a), b), c) and d) compliance flow chart106
Figure A.1 AC and DC measurement circuit below 1MHz frequency109
Figure A.2 A measuring circuit for sinusoidal AC and DC with a frequency not exceeding 100 Hz110
Figure A.3 Circuit for measuring electric burn current110
Figure A.4 Current measurement circuit for wet contact111
Figure B.1 Insulation between parts---Example 1112
Figure B.2 Insulation between parts --- Example 2113
Figure B.3 Insulation between parts --- Example 3114
Figure B.4 Insulation between parts --- Example 4115
Figure B.5 Insulation between parts --- Example 5116
Figure C.1 Single-phase two-wire electric energy meter with UC2SCS and 25ALCS117
Figure C.2 Three-phase four-wire electric energy meter with UC2UCS and 2A auxiliary control switch118
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 meter119
Figure E.1 Test circuit for verifying the short-term withstand current test on a current circuit with or without a power control switch120
Figure E.2 Example of AC single-phase short-circuit load test record in the case of unipolar equipment121
Figure F.1 Voltage test arrangement. Directly connected three-phase four-wire electric energy meter with power control switch and load control switch122
Figure F.2 Test arrangement for voltage test. three-phase four-wire connected to the electric energy meter through a transformer124
Figure H.1 Test equipment for cable bending and tensile testing (see 6.9.7.3)127
Figure J.1 Protection of non-rechargeable batteries129
Figure J.2 Protection of rechargeable batteries129
Table 1 Test copper conductors for current and switch terminals19
Table 2 Information requirements24
Table 3 Symbols of IEC 60417 and ISO 7000 that can be used on measuring equipment27
Table 4 Tightening torque of the fastening screw set42

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.

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,

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.

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