GB/T 42020-2022 English PDF

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GB/T 42020-2022: Specification for measuring laboratory power source characteristics
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Basic data

Standard ID: GB/T 42020-2022 (GB/T42020-2022)
Description (Translated English): Specification for measuring laboratory power source characteristics
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: N29
Classification of International Standard: 29.220
Word Count Estimation: 10,158
Date of Issue: 2022-10-14
Date of Implementation: 2023-05-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42020-2022: Specification for measuring laboratory power source characteristics

---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.
Specification for measuring laboratory power source characteristics ICS 29.220 CCSN29 National Standards of People's Republic of China Measurement Specification for Laboratory Power Supply Characteristics Published on 2022-10-12 2023-05-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface I Introduction II 1 Scope 1 2 Normative references 1 3 Terms, Definitions and Symbols 1 4 Laboratory Responsibilities 2 5 General Requirements 2 6 Equipment, instruments and meters 2 7 Requirements 3 8 Measurement procedure 3 9 Values to be recorded and calculated4 10 Requirements for records 5 Appendix A (Informative) Format of Measurement Records 6

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" drafted. This document is modified to adopt IEC EEOD-5010.2021 "Measurement Procedures for Laboratory Power Characteristics". The file type is operated by IEC EE The document is adjusted to the national standard of our country. This document has the following structural adjustments compared to IEC EEOD-5010.2021. ---Introduction corresponds to Chapter 1 and 2.3~2.5 of IEC EEOD-5010.2021; --- Chapter 1 corresponds to 2.1, 2.2 and 2.6 of IEC EEOD-5010.2021; --- Chapter 2 corresponds to Chapter 3 of IEC EEOD-5010.2021; --- Chapter 3 corresponds to 4.1 and 4.2 of IEC EEOD-5010.2021; --- Chapter 4 corresponds to Chapter 5 of IEC EEOD-5010.2021; --- Chapter 5 corresponds to Chapter 6 of IEC EEOD-5010.2021; --- Chapter 6 corresponds to Chapter 7 of IEC EEOD-5010.2021; --- Chapter 7 corresponds to Chapter 8 of IEC EEOD-5010.2021; --- Chapter 8 corresponds to Chapter 9 of IEC EEOD-5010.2021; --- Chapter 9 corresponds to Chapter 4.3 and Chapter 10 of IEC EEOD-5010.2021; --- Chapter 10 corresponds to Chapter 11 of IEC EEOD-5010.2021. The following editorial changes have been made to this document. --- Change the standard name to "Measurement Specifications for Laboratory Power Characteristics". Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Machinery Industry Federation. This document is under the jurisdiction of the National Standardization Technical Committee of Laboratory Instruments and Equipment (SAC/TC526). This document is drafted by. China National Accreditation Center for Conformity Assessment, Institute of Comprehensive Technology and Economics of Machinery Industry Instrumentation, Beijing Tairui Special Testing Technology Service Co., Ltd., Zhongjiayuan (Beijing) Testing and Certification Co., Ltd., Hangzhou Wo Lei Intelligent Technology Co., Ltd. The main drafters of this document. Chen Di, Wang Kai, Zhang Guiling, Zhou Jie, Gao Hongwei, Wang Liwen, Shuaihong, Guo Bin.

Introduction

The purpose of this document is to establish specifications for measuring laboratory power supply characteristics at test connection locations to determine whether laboratory power supplies comply with national International Electrotechnical Commission Electrotechnical Products Qualification Testing and Certification Organization Mutual Recognition (IEC EE-CB) system requirements for power supply (see GB/T 27025- 6.3.1 and 6.3.2 in.2019). When tested in accordance with electrical safety standards, the test results of electrical products depend on the characteristics of the power supply for them. E.g. a) The temperature of electrical heating parts is affected by the supplied voltage. In most cases, an increase in voltage leads to an increase in temperature. and For some products, a decrease in voltage can also cause their temperature to increase. b) The frequency of the power supply also affects the temperature of electrical heating components, such as motors, transformers and electromagnetic coils. c) Harmonic distortion of the power supply not only affects the temperature of electrical heating components, such as motors, transformers and electromagnetic coils, but also affects the production leakage current of the product. The relevant test standards specify the voltage, frequency and waveform characteristics of the power supply used, such as 230V, 50Hz sine wave power supply. source. The specifications in this document are based on the fact that the characteristics of the power supply are maintained throughout the test. but actually On the other hand, it is impossible for a power supply to meet these ideal technical characteristics. Therefore, some standards introduce tolerances in the characteristics of power supply specifications, but still Some standards do not have relevant provisions. IEC EE-CB Test Laboratory Committee when test standards do not include tolerances/requirements for the power supply used It is clarified that the power supply of the laboratory should meet the requirements of consistent power supply characteristics. These requirements define the actual electrical characteristics of the source, so that laboratories can obtain consistent, uniform and repeatable test results, thereby further promoting the test in the IEC EE-CB system. Mutual recognition of test results. The power supply stability requirements of this document apply to tests of products connected to residential and commercial ordinary power supply branch circuits, such as 120V, 15A or 20A, 240V, 15A circuits in North America and 230V, 10A or 16A branch circuits in Europe. When according to this document When evaluating the test circuit and determining that it complies with the documentation requirements, only the initial test conditions are allowed to be recorded without further monitoring of the power supply; when using When testing a circuit beyond its evaluation range, it is necessary to monitor the stability of the circuit throughout the test. Except for the above mentioned Except for the type of power supply, this document does not specify the requirements for other laboratory power supplies. However, these laboratory power supplies still need to comply with GB/T 27025- Requirements of 6.3.1 and 6.3.2 in.2019. Measurement Specification for Laboratory Power Supply Characteristics

1 Scope

This document specifies the requirements for the measurement of laboratory power characteristics and establishes the procedures for the measurement of laboratory power characteristics. This document applies to. --- Test within the maximum rated current of the power supply; --- The tested sample is in normal working condition. This document does not apply to. --- Building power supplies for laboratories, such as power supplies for test instruments, environmental test chambers, lighting, etc. --- DC power supply for the DC electrical equipment under test. ---Testing of photovoltaic arrays. Photovoltaic arrays generate their own electricity (if auxiliary equipment used is connected to branch circuits to which this document applies, This document applies to the testing of such photovoltaic array auxiliary equipment). --- Short-circuit current test, abnormal test, switch test and similar tests related to power supply capacity. --- Electromagnetic compatibility test.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GB/T 27025-2019 General requirements for the competence of testing and calibration laboratories (ISO /IEC 17025.2017, IDT) IEC 60038.2009 standard voltages (IEC standardvoltages) Note. GB/T 156-2017 standard voltage (IEC 60038.2009, MOD) 3 Terms, Definitions and Symbols 3.1 Terms and Definitions The following terms and definitions apply to this document. 3.1.1 A means of regulation that automatically maintains voltage and/or frequency at specified values by electronic, electrical or mechanical means. 3.1.2 Maintain voltage and/or frequency at specified values by manually adjusting autotransformers, tap transformers with selector switches, or similar devices Way. 3.1.3 nominal voltage nominalvoltage Test the circuit voltage supplied at the connection location (see 8.2.1). ......

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