All technical content in this part of GB19212 is mandatory. GB19212 "Safety of Power Transformers, Power Supplies, Reactors, and Similar Products" currently includes the following parts: Part 1: General Requirements and Tests; Part 2: Special requirements for general purpose separated transformers; Part 3: Special requirements for control transformers; Part 4: Special requirements for ignition transformers for gas and oil burners; Part 5: Special requirements for general purpose isolation transformers; Part 6: Special requirements for transformers and power supply devices for shavers; Part 7: Special requirements for general purpose safety isolation transformers; Part 8: Special requirements for transformers for toys; Part 9: Special requirements for bells and bell transformers; Part 10: Special requirements for transformers for Class III portable tungsten filament lamps; Part 13: Special requirements for constant voltage transformers; Part 14: Special requirements for general purpose autotransformers; Part 15: Special requirements for voltage regulators; Part 16: Special requirements for isolation transformers for power supply in medical facilities; Part 17: Special requirements for transformers for switch mode power supplies and switch mode power supplies; Part 18: Special requirements for transformers used in switch mode power supplies; Part 20: Special requirements for interference attenuation transformers; Part 21: Special requirements for small reactors; Part 24: Special requirements for transformers used in construction sites. Other parts are under consideration. This section is the first part of GB19212. This section is used in conjunction with other parts of GB19212. This part is equivalent to IEC61558-1:2005 "Safety of Power Transformers, Power Supplies, Reactors and Similar Products - Part 1: General Requirements and Tests" (English version). This section is drafted using translation method according to IEC61558-1:2005. For ease of use, the following editorial modifications have been made to this section: a) This international standard has been changed to this section, and this standard has been changed to this section; b) The relevant part 2 or related part 2 of this standard is changed to other parts of GB19212 or other relevant parts of GB19212; c) Replace the comma as the decimal point with a decimal point,; d) Delete the preface of IEC61558-1:2005; e) Omit the defined term index in IEC61558-1:2005; f) For other international standards referenced in IEC61558-1:2005, if the latest version is equivalent or modified to be adopted as a Chinese standard, these national standards of China are cited in this section to replace the corresponding international standards. The other international standards are directly referenced in this section (see Chapter 2 of this section); g) In Chapter 2 of this section, GB1002-1996 "Types, Basic Parameters, and Dimensions of Single-phase Plugs and Sockets for Household and Similar Purposes" is used instead of IEC60083:2004 "IEC Publication III 犌犅19212.1-2008/犐犈犆61558-1:2005 Standardized Household and Similar General Purpose Plugs and Sockets in Member States" in Chapter 2 of the normative reference document. This IEC publication is not a standard, but an IEC3 technical report, Provide only general information on household and similar general purpose plugs and sockets standardized by IEC member countries, including diagrams and tables; The basic information of GB1002-1996 in China, including figures and tables, is also listed in IEC60083:2004. This section replaces GB19212.1-2003 "Safety of Power Transformers, Power Supply Units, and Similar Products - Part 1: General Requirements and Tests". The main technical changes in this section compared to GB19212.1-2003 are as follows: a) The writing format has been modified according to the provisions of GB/T1.1-2000 "Guidelines for Standardization Work - Part 1: Structure and Writing Rules of Standards"; b) The standard name is changed to "Safety of Power Transformers, Power Supplies, Reactors, and Similar Products - Part 1: General Requirements and Tests"; c) Chapter 1 added a note explaining the differences between transformers, power supplies, and switch mode power supplies, and added transformers with the 狋 w symbol to the scope of application; d) Chapter 3 revised the safety isolation transformer, supporting transformer, built-in transformer, specialized transformer, independent transformer, non inherent short-circuit resistant transformer, inherent short-circuit resistant transformer, non short-circuit resistant transformer, non hazardous transformer, mobile transformer, fixed transformer, dry transformer, connecting lead, rated output current, rated output voltage, rated output, ultra-low voltage, safe ultra-low voltage Definition of terms such as live parts and hazardous live parts; Added non inherent short-circuit resistant transformers with resettable, self resetting, or replaceable protective devices, non inherent short-circuit resistant transformers with non self resetting or non replaceable protective devices, power supplies, switch type power supplies, reactors, intermediate conductive components, conductive components, electrical isolation, intentionally weak components, working methods, short-term working cycles, intermittent working cycles, protective grounding conductors, internal circuits, insulated winding wires Terms and definitions such as rated power frequency, internal working frequency, rated minimum ambient temperature, 狋 w, functional insulation, contact current, protective grounding conductor current, etc; e) Chapter 7 has added classification based on the rated maximum operating temperature of the winding 狋 w and the corresponding evaluation of expected life under specified conditions, as well as classification based on the environmental conditions of the intended place of use; f) Chapter 8 has added the specified value of the rated maximum working temperature of the winding (in increments of 5 ℃), as well as the sign of the rated expected life, the sign of wind cooling, the graphic symbol for indoor use only, and relevant information when special attention needs to be paid to installation or use; g) Chapter 9 added the measurement of discharge voltage 1 second after unplugging the plug; h) Chapter 15 added overload tests for transformers protected by intentionally weak components; i) The title of Chapter 18 has been changed to Insulation Resistance, Dielectric Strength, and Leakage Current, and the limits and measurements of contact current and protective grounding conductor current have been added; j) Chapter 22 added the requirements for the power cord of transformers greater than IPX0; k) Chapter 26 revised the requirements for insulation distance through; l) Figure 8 test circuit has been added to the main text: single-phase equipment on star connected TN or TT systems; m) Added the application description of 4.1.1.2.1 in Appendix RGB/T16935.1-1997, and Appendix U can be optionally marked with 狋 w transformer. Appendices A, B, C, D, E, F, G, H, J, K, L, R, and W of this section are normative annexes, while Appendices M, N, P, Q, U, and V are informative annexes. This section is proposed by the China Electrical Industry Association. This part is under the jurisdiction of the National Transformer Standardization Technical Committee (SAC/TC44). Drafting units for this part: China Institute of Electronic Technology Standardization, Shenyang Transformer Research Institute, and China National Electric Group Co., Ltd. The main drafters of this section are Zhang Lili, Sun Jun, Ma Zhizhi, Wang Zhongyi, and Jin Chengxiang. This section was first released in 2003, and this is the first revision