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Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 19212.2-2025: Safety of transformers, reactors, power supply units and combinations thereof - Part 2: Particular requirements and tests for separating transformers and power supply units incorporating separating transformers for general applications Status: Valid GB/T 19212.2: Historical versions
Basic dataStandard ID: GB/T 19212.2-2025 (GB/T19212.2-2025)Description (Translated English): Safety of transformers, reactors, power supply units and combinations thereof - Part 2: Particular requirements and tests for separating transformers and power supply units incorporating separating transformers for general applications Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K41 Classification of International Standard: 29.180 Word Count Estimation: 18,132 Date of Issue: 2025-02-28 Date of Implementation: 2025-09-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 19212.2-2025: Safety of transformers, reactors, power supply units and combinations thereof - Part 2: Particular requirements and tests for separating transformers and power supply units incorporating separating transformers for general applications---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. GB/T 19212.2-2025 English version. Safety of transformers, reactors, power supply units and combinations thereof - Part 2.Particular requirements and tests for separating transformers and power supply units incorporating separating transformers for general applications ICS 29.180 CCSK41 National Standard of the People's Republic of China Replaces GB/T 19212.2-2012 Safety of transformers, reactors, power supply units and their combinations Part 2.General purpose isolating transformers and built-in isolating Particular requirements and tests for power supply units with transformers Part 2.Particularrequirementsandtestsforseparatingtransformersandpower (IEC 61558-2-1.2021, Safety of transformers, reactors, power supply units andcombinationsthereof-Part 2-1.Particularrequirementsandtestsfor Published on February 28, 2025, implemented on September 1, 2025 State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 General 2 5 General matters of the test 2 6 Rated value 2 7 Categories 2 8 Signs and other information 3 9 Electric shock protection 3 10 Change of input voltage setting value 3 11 Load output voltage and output current 3 12 No-load output voltage 3 13 Short circuit voltage 4 14 Fever 4 15 Short circuit and overload protection 4 16 Mechanical strength 5 17 Protection against harmful ingress of dust, solid foreign objects and moisture 5 18 Insulation resistance, dielectric strength and leakage current 5 19 Structure 5 20 Components 5 21 Internal Wiring 5 22 Power supply connection and other external flexible cables or cords 5 23 External wire terminal 5 24 Protective earthing device 5 25 Screws and connections 5 26 Creepage distance, electrical clearance and insulation distance 5 27 Heat, flame and tracking resistance 6 28 Rust prevention 6 Appendix 7 References 8 Table 101 Symbols indicating transformer types 3 Table 102 Output voltage ratio 4ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is Part 2 of GB/T 19212 "Safety of transformers, reactors, power supply units and their combinations"1). GB/T 19212 has been The following parts have been published. 1) In this series of documents, some parts are under the heading "Safety of power transformers, power supplies, reactors and similar products" and some parts are under the heading "Mains voltage Some parts are under the heading "Safety of transformers, reactors, power supply units and similar products of 1100 V and below" All future releases of this series of documents will be under the title of "Safety of Transformers, Reactors, Power Supply Devices and Their Combinations" release. --- Part 1.General requirements and tests; --- Part 2.Particular requirements and tests for general purpose isolating transformers and power supply units with built-in isolating transformers; --- Part 3.Particular requirements and tests for control transformers and power supplies with built-in control transformers; --- Part 4.Particular requirements and tests for ignition transformers for gas and oil burners; --- Part 5.Particular requirements and tests for general purpose isolating transformers and power supply units with built-in isolating transformers; --- Part 6.Particular requirements and tests for shaver transformers, shaver power supply units and shaver power supply units; --- Part 7.Particular requirements and tests for safety isolating transformers and power supply units with built-in safety isolating transformers; --- Part 8.Particular requirements and tests for transformers and power supplies for toys; --- Part 9.Particular requirements and tests for transformers and power supplies for bells and clocks; --- Part 10.Particular requirements and tests for transformers and power supply units for class III portable tungsten filament lamps; --- Part 11.Special requirements for high insulation level separating transformers and separating transformers with output voltage exceeding 1000V and test; --- Part 13.Particular requirements and tests for constant voltage transformers and power supply units; --- Part 14.Particular requirements and tests for general purpose autotransformers and power supply units with built-in autotransformers; --- Part 15.Particular requirements and tests for voltage regulators and power supply units with built-in voltage regulators; --- Part 16.Particular requirements and tests for isolating transformers for power supply to medical facilities; --- Part 17.Particular requirements and tests for switching power supply units and transformers for switching power supply units; --- Part 20.Particular requirements for interference attenuation transformers; --- Part 21.Special requirements and tests for small reactors; --- Part 24.Particular requirements and tests for transformers and power supply units for construction sites; --- Part 27.Particular requirements and tests for transformers and power supply units for energy saving and other purposes. This document replaces GB/T 19212.2-2012 "Safety of power transformers, power supplies, reactors and similar products Part 2.General Particular requirements and tests for power supplies with separation transformers and built-in separation transformers" compared with GB/T 19212.2-2012, except for the structure In addition to adjustments and editorial changes, the main technical changes are as follows. --- Changed the content of the "Scope" chapter and redefined the scope of application and scope of non-application (see Chapter 1, Chapter 1 of the.2012 edition); --- Changed the graphic symbols and added a new symbol with output voltage as "linear power supply device" (see Chapter 8,.2012 edition Chapter 8); --- Changed the requirements for no-load output voltage and added "For independent transformers, the rated output voltage should exceed AC 50V or no ripple Wave DC 120V" (see 12.101, 12.101 of the.2012 edition); --- Changed the requirements for product structure (see Chapter 19, Chapter 19 of the.2012 edition); --- Deleted the additional requirements for creepage distance, electrical clearance and insulation distance, and changed to directly quote GB/T 19212.1- 2023 (see Chapter 26, Chapter 26 of the.2012 edition); --- Deleted Appendices C and D (see Appendices C and D of the.2012 edition). This document is modified to adopt IEC 61558-2-1.2021 "Safety of transformers, reactors, power supply units and their combinations - Part 2-1.1 Special requirements and tests for general purpose separating transformers and power supply units with built-in separating transformers. The technical differences between this document and IEC 61558-2-1.2021 and their reasons are as follows. --- IEC 61558-1.2017 was replaced by GB/T 19212.1-2023, which is a modified international standard, to meet the actual situation in my country situation and ease of use; --- Replaced IEC 60076-11.2018 with GB/T 1094.11, which is a modified international standard, and adjusted it from reference to Normative references; --- Added references to GB/T 5465.2-2023 and GB/T 19212.17. The following editorial changes were made to this document. --- The name of the standard was changed to "Safety of transformers, reactors, power supply units and their combinations - Part 2.General purpose separation transformers and Particular requirements and tests for power supply units with built-in separation transformers"; --- The contents of Chapter 1 were rewritten, and the last two paragraphs and Note 1 were deleted; --- The introduction to Chapter 3 was adjusted; ---The references were adjusted. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Electrical Equipment Industry Association. This document is issued by the National Technical Committee for Standardization of Small Power Transformers, Reactors, Power Supplies and Similar Products (SAC/TC418) Centralized. This document was drafted by. Shenyang Transformer Research Institute Co., Ltd., Beijing Tairui Testing Technology Service Co., Ltd., China Electronics Technical Standardization Institute, Zhongshan Baolijin Electronics Co., Ltd., Shanghai Quality Supervision and Inspection Technology Research Institute, Quzhou Sanyuan Huineng Electronics Co., Ltd., Zhongshan Ruikang Electric Co., Ltd., Hunan University, the Fifth Institute of Electronics of the Ministry of Industry and Information Technology, Hongle Group Co., Ltd., Yueqing Heyuan Electronic Technology Co., Ltd., China Academy of Building Materials (Beijing) Testing and Certification Co., Ltd., China Quality Certification Center Co., Ltd., Dongguan Ming Puguang Magnetics Co., Ltd., Dongguan Dazhong Electronics Co., Ltd., Tianjin Optoelectronics Huigao Electronics Co., Ltd., China Coal Technology and Engineering Group Shenyang Research Institute INN LIMITED. The main drafters of this document are. Wang Xin, Liu Li, Li Yuzhen, Lin Junrong, Xu Yi, Hu Wenkang, Luo Linan, Liu Jun, Lei Qiang, Feng Junfeng, Wang Huaili, Guan Qinggang, Zhen Baohua, Wang Yenan, Yang Jianmin, Wang Youxiong, Li Dongbo, Zhang Hongkui. The previous versions of this document and the documents it replaces are as follows. ---First published in.2006 as GB 19212.2-2006, first revised in.2012 as GB/T 19212.2-2012; ---This is the second revision.IntroductionThe series of standards on the safety of transformers, reactors, power supply devices and their combinations are formulated to provide a reference for the safety of transformers with rated power supply voltage not exceeding AC. 1000V, rated power frequency not exceeding 500Hz transformers, reactors, power supply devices and their combination products to establish a set of best evaluation Guidelines for the safety of related products in terms of material selection, design, production and inspection, and for the development of related products GB/T 19212 aims to establish the design and certification standards for transformers, reactors, power supply units and their combined products. It is planned to consist of 20 parts, including principles and relevant rules for design, manufacturing and testing. --- Part 1.General requirements and tests. The purpose is to establish the overall general technical requirements for products covered by the GB/T 19212 series of standards. Technical requirements and test requirements. --- Part 2.Particular requirements and tests for general purpose isolating transformers and power supply units with built-in isolating transformers. Establish the general purpose isolating transformers and power supply units with built-in isolating transformers not included in or inconsistent with Part 1 Special technical requirements and test requirements. --- Part 3.Particular requirements and tests for control transformers and power supplies with built-in control transformers. The purpose is to establish the control transformer Special technical requirements and test requirements for power supplies for devices and built-in control transformers that are not included in or inconsistent with Part 1. --- Part 4.Particular requirements and tests for ignition transformers for gas and oil burners. The purpose is to establish Special technical requirements and test requirements for ignition transformers not included in or inconsistent with Part 1. --- Part 5.Particular requirements and tests for general purpose isolating transformers and power supply units with built-in isolating transformers. Establish the requirements for general purpose isolating transformers and power supply units with built-in isolating transformers not included in or inconsistent with Part 1 Special technical requirements and test requirements. --- Part 6.Particular requirements and tests for shaver transformers, shaver power supply units and shaver power supply units. To establish the terms and conditions for transformers for shavers, power supply units for shavers and power supply units for shavers not included in or incompatible with Part 1 Consistent special technical requirements and test requirements. --- Part 7.Particular requirements and tests for safety isolating transformers and power supply units with built-in safety isolating transformers. Establish safety isolating transformers and power supply units incorporating safety isolating transformers not included in or inconsistent with Part 1 Special technical requirements and test requirements. --- Part 8.Particular requirements and tests for transformers and power supplies for toys. The purpose is to establish the requirements for transformers and power supplies for toys in Special technical requirements and test requirements not included in or inconsistent with Part 1. --- Part 9.Particular requirements and tests for transformers and power supply units for bells and clocks. The purpose is to establish Special technical requirements and test requirements for transformers and power supplies not included in or inconsistent with Part 1. --- Part 10.Particular requirements and tests for transformers and power supply units for class III portable tungsten filament lamps. Transformers and power supplies for tungsten filament lamps have special technical requirements and test requirements not included in or inconsistent with Part 1. --- Part 11.Special requirements and test methods for high insulation level separating transformers and separating transformers with output voltage exceeding 1000V The purpose is to establish the separation transformer with high insulation level and the separation transformer with output voltage exceeding 1000V in Part 1 Special technical requirements and test requirements not included in or inconsistent with it. --- Part 13.Particular requirements and tests for constant voltage transformers and power supply units. The purpose is to establish constant voltage transformers and power supply units Special technical requirements and test requirements not included in or inconsistent with Part 1. --- Part 14.Particular requirements and tests for general purpose autotransformers and power supply units with built-in autotransformers. To establish the requirements for general purpose autotransformers and power supply units incorporating autotransformers not covered by or inconsistent with Part 1 Special technical requirements and test requirements. --- Part 15.Particular requirements and tests for voltage regulators and power supply units with built-in voltage regulators. The purpose is to establish The power supply unit of the voltage regulator has special technical requirements and test requirements not included in or inconsistent with Part 1. --- Part 16.Particular requirements and tests for isolating transformers for power supply to medical places. The purpose is to establish the requirements for isolating transformers for power supply to medical places. Special technical requirements and test requirements for isolation transformers not included in or inconsistent with Part 1. --- Part 17.Particular requirements and tests for switching power supply units and transformers for switching power supply units. Special technical requirements for transformers for switched-mode power supplies and switching-mode power supplies not included in or inconsistent with Part 1 and test requirements. --- Part 20.Particular requirements for interference attenuation transformers. The purpose is to establish the requirements for interference attenuation transformers not covered in Part 1. Or special technical requirements and test requirements that are inconsistent therewith. --- Part 21.Special requirements and tests for small reactors. The purpose is to establish the requirements for small reactors not included in Part 1 or Special technical requirements and test requirements that are inconsistent with it. --- Part 24.Particular requirements for transformers and power supply units for construction sites. The purpose is to establish the requirements for transformers for construction sites. Special technical requirements and test requirements for power supply devices not included in or inconsistent with Part 1. --- Part 27.Particular requirements and tests for transformers and power supply units for energy saving and other purposes. The purpose is to establish energy saving and other Transformers and power supplies for other purposes have special technical requirements and test requirements not included in or inconsistent with Part 1. GB/T 19212 stipulates in 20 parts that the rated power supply voltage shall not exceed AC 1000V and the rated power supply frequency shall not exceed 500Hz transformers, reactors, power supply units and their combination products related to electrical, temperature and mechanical safety requirements and test requirements By establishing clear scope, terminology, technical requirements and test requirements for various products, the producers, users and testers of related products can It enables operators to operate more clearly and accurately, thus laying the foundation for designing and manufacturing high-quality, safe and reliable products. This document is Part 2 of GB/T 19212 "Safety of transformers, reactors, power supply units and their combinations". GB/T 19212.1-2023 is used in conjunction with this document. This document follows the writing structure of GB/T 19212.1-2023 and is an addition to its corresponding clauses. When the provisions of GB/T 19212.1-2023 are not mentioned in this document, these provisions shall also apply as long as it is reasonable. This document. When "addition", "modification" or "replacement" is indicated in this document, it means that the relevant provisions of GB/T 19212.1-2023 are replaced in this document. This document is adapted accordingly. The clause numbers of this document start from 101 for the newly added contents of GB/T 19212.1-2023. Safety of transformers, reactors, power supply units and their combinations Part 2.General purpose isolating transformers and built-in isolating Particular requirements and tests for power supply units with transformers1 ScopeThis chapter of GB/T 19212.1-2023 is replaced by the following. This document specifies the electrical, thermal and mechanical safety aspects of separating transformers for general use and power supply units with built-in separating transformers. Transformers with electronic circuits are also included in this document. Unless otherwise specified, the term "transformer" below includes general purpose separating transformers and power supply units incorporating separating transformers. For (linear) power supply units, this document applies. For switching power supply units, GB/T 19212.17 applies. This document does not apply to transformers covered by GB/T 1094.11. This document applies to stationary or mobile, single-phase or multi-phase, air-cooled (self-cooled or air-cooled), independent or supporting dry-type transformers. The windings can be e......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 19212.2-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 19212.2-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. 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