GB/T 19212.1: Evolution and historical versions
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PDF similar to GB/T 19212.1-2023
Basic data | Standard ID | GB/T 19212.1-2023 (GB/T19212.1-2023) | | Description (Translated English) | Safety of transformers, reactors, power supply units and combinations thereof - Part 1: General requirements and tests | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K41 | | Classification of International Standard | 29.180 | | Word Count Estimation | 144,169 | | Date of Issue | 2023-09-07 | | Date of Implementation | 2024-04-01 | | Older Standard (superseded by this standard) | GB/T 19212.1-2016 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 19212.1-2023: Safety of transformers, reactors, power supply units and combinations thereof - Part 1: General 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.
ICS 29.180
CCSK41
National Standards of People's Republic of China
Replace GB/T 19212.1-2016
Safety of transformers, reactors, power supply units and combinations thereof
Part 1.General requirements and tests
(IEC 61558-1.2017, MOD)
Published on 2023-09-07
2024-04-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
Preface V
Introduction VIII
1 Scope 1
2 Normative reference documents 3
3 Terms and Definitions 6
4 General Rule 18
5 General matters for testing18
6 Rated 20
7 Category 20
8 Logo and other information21
9 Protection against electric shock 26
10 Change of input voltage setting value 29
11 Load output voltage and output current 29
12 No-load output voltage 30
13 Short circuit voltage 30
14 Fever 30
15 Short circuit and overload protection37
16 Mechanical strength 41
17 Protection against the harmful ingress of dust, solid foreign objects and moisture 43
18 Insulation resistance, dielectric strength and leakage current 47
19 Structure 51
20 components 62
21 Internal wiring 66
22 Power connections and other external flexible cables or cords 66
23 External wire terminal 72
24 Protective earthing device 73
25 Screws and connections 74
26 Creepage distances, clearances and through-insulation distances 76
27 Heat resistance, flame resistance and tracking resistance 89
28 Anti-rust 92
Appendix A (informative) Comparison between this document and IEC 61558-1.2017 structure number 93
Appendix B (informative) Technical differences between this document and IEC 61558-1.2017 and their reasons 98
Appendix C (Normative) Routine test (production test) 100
Appendix D (Normative) Tests for Series Transformers 101
Appendix E (Normative) Electronic Circuits 103
Appendix F (informative) Description of protection level IP code 106
Appendix G (informative) Symbols for thermal circuit breakers 108
Appendix H (informative) Example of test voltage application point in dielectric strength test 109
Appendix I (informative) Example 111 of the guidance on the use of 19.1
Appendix J (normative) Insulated winding wire 114
Appendix K (Normative) Requirements for manual switches as assembly parts of transformers 117
Appendix L (Normative) Dimensions, basic dimensions and coordination of transformer rectangular cross-section connector 119
Appendix M (Normative) Measurement of creepage distances and clearances 121
Appendix N (informative) Examples of creepage distance and clearance measurement points 124
Appendix O (normative) Tracking test 127
Appendix P (informative) Application instructions for 6.1.2.2.1 in GB/T 16935.1-2008 128
Appendix Q (Normative) Glow Wire Test 130
Appendix R (Normative) Coated printed circuit boards 131
Reference 132
Figure 1 Principles for the formulation of GB/T 19212 (all parts) X
Figure 2 Embedded transformer installation box 20
Figure 3 Test pin (see GB/T 16842 test tool 13) 27
Figure 4 Standard test finger (see GB/T 16842 test tool B) 28
Figure 5 Example of single-phase mutual loading method 34
Figure 6 Three-phase mutual load method example 35
Figure 7 Random test amplitude spectral density 43
Figure 8 Test voltage 49
Figure 9 Test configuration. single-phase equipment 50 on a star-connected TN or TT system
Figure 10 Wear resistance test of insulating coating 57
Figure 11 Flexible testing equipment 70
Figure 12 Test device for testing the mechanical resistance of thin-layer insulating materials 82
Figure 13 Ball pressure test device 89
Figure E.1 Example of an electronic circuit with a small power point 105
Figure G.1 Manual reset 108
Figure G.2 Power off reset 108
Figure G.3 Thermal fuse (see 3.3.5) 108
Figure G.4 Self-resetting thermal circuit breaker 108
Figure H.1 Class I transformer with metal casing109
Figure H.2 Class II structure transformer with metal casing 110
Figure H.3 Class II structural transformer with insulating material casing110
Figure I.1 Example of concentric structure 111
Figure I.2 Parallel structure example 112
Figure I.3 Example of winding without shield 112
Figure I.4 Example of wrapped winding structure 113
Figure I.5 Example of winding with shield 113
Figure M.1 Example 1 121
Figure M.2 Example 2 122
Figure M.3 Example 3 122
Figure M.4 Example 4 122
Figure M.5 Example 5 122
Figure M.6 Example 6 123
Figure M.7 Example 7 123
Figure M.8 Example 8 123
Figure N.1 Transformer of Class I structure 124
Figure N.2 Class I structural transformer with grounded metal shield 125
Figure N.3 Class II structural transformer with metal shell 125
Figure N.4 Class II structural transformer with insulating material casing126
Table 1 Symbols on the device or in the instructions24
Table 2 Maximum temperature value during normal use 32
Table 3 Description of the maximum winding temperatures required in Table 233
Table 4 Test temperature and test time for each cycle 36
Table 5 Maximum temperature under short circuit or overload conditions38
Table 6 T and k values of fuses39
Table 7 Pulling force on pin 42
Table 8 Vibration test conditions (random) 42
Table 9 Amplitude spectral density (ASD) values for accelerated life testing42
Table 10 Frequency values according to sample mass 43
Table 11 Test to prevent solid foreign objects from entering the transformer 45
Table 12 Insulation resistance value 47
Table 13 Dielectric strength test voltage value table 48
Table 14 Current Limit 51
Table 15 Nominal cross-sectional area of external flexible cables or cords 68
Table 16 Tensile forces and moments applied to power cords 71
Table 17 Torques exerted on screws and connections 75
Table 18 Torque test of sealing cover 76
Table 19 Electrical clearance 80
Table 20 Creepage distance 83
Table 21 Through insulation distance 85
Table 22 Creepage distance and clearance between external terminals 86
Table 23 Minimum outer diameter and minimum test voltage of FIW conductors (according to the increase of enameled coating) 87
Table A.1 Comparison between this document and IEC 61558-1.2017 structure number93
Table B.1 Technical differences between this document and IEC 61558-1.2017 and their reasons 98
Table F.1 The first characteristic number represents the protection level against access to hazardous parts 106
Table F.2 Protection level 107 for solid foreign matter entry represented by the first characteristic number
Table F.3 Protection level represented by the second characteristic number 107
Table J.1 Round rod diameter 115
Table J.2 Oven temperature 115
Table K.1 Peak surge current for additional loads118
Table L.1 Dimensions of rectangular copper connectors119
Table M.1 Width of trenches based on pollution level121
Table P.1 Impulse test voltage determined according to 6.1.2.2.1 in GB/T 16935.1-2008 128
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document is Part 1 of GB/T 19212 "Safety of transformers, reactors, power supply units and their combinations". GB/T 19212 has been
The following sections have been published.
test;
---GB/T 19212.2-2012 Safety of power transformers, power supplies, reactors and similar products Part 2.General purpose classification
Special requirements and tests for separate transformers and power supplies with built-in isolating transformers;
---GB/T 19212.3-2012 Safety of power transformers, power supplies, reactors and similar products Part 3.Control transformers
Special requirements and tests for power supplies with built-in control transformers;
---GB/T 19212.4-2016 Safety of transformers, reactors, power supply units and their combinations Part 4.Gas and oil burning
Special requirements and tests for burner ignition transformers;
---GB/T 19212.5-2011 Transformers, reactors, power supply units and similar products with power supply voltage of 1100V and below
Safety Part 5.Special requirements and tests for isolating transformers and power supply units incorporating isolating transformers;
---GB/T 19212.6-2013 Safety of transformers, reactors, power supply units and combinations thereof Part 6.Transformers for shavers
Special requirements and tests for appliances, power supply units for shavers and power supply units for shavers;
---GB/T 19212.7-2012 Transformers, reactors, power supply units and similar products with power supply voltage of 1100V and below
Safety Part 7.Special requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers;
---GB/T 19212.8-2012 Safety of power transformers, power supplies, reactors and similar products Part 8.Transformers for toys
Special requirements and tests for devices and power supplies;
---GB/T 19212.9-2016 Safety of transformers, reactors, power supply units and their combinations Part 9.Electric bells and bell transformers
Special requirements and tests for voltage regulators and power supply units;
---GB/T 19212.10-2014 Safety of transformers, reactors, power supply units and their combinations - Part 10.Class III portable tungsten
Special requirements and tests for transformers and power supply units for filament lamps;
---GB/T 19212.11-2020 Safety of transformers, reactors, power supply units and their combinations Part 11.High insulation level
Particular requirements and tests for isolating transformers and isolating transformers with output voltages exceeding 1000 V
---GB/T 19212.13-2019 Safety of transformers, reactors, power supply units and combinations thereof Part 13.Constant voltage transformers
and special requirements and tests for power supply units;
---GB/T 19212.14-2012 Transformers, reactors, power supply units and similar products with power supply voltage of 1100V and below
Safety Part 14.Special requirements and tests for autotransformers and power supply units with built-in autotransformers;
---GB/T 19212.15-2016 Safety of transformers, reactors, power supply units and their combinations - Part 15.Voltage regulators and internal
Special requirements and tests for power supply units equipped with voltage regulators;
---GB/T 19212.16-2017 Safety of transformers, reactors, power supply units and their combinations Part 16.Supply for medical places
Special requirements and tests for electrical isolating transformers;
---GB/T 19212.17-2019 Transformers, reactors, power supply units and similar products with power supply voltage of 1100V and below
Safety Part 17.Special requirements and tests for switching power supply units and transformers for switching power supply units;
---GB/T 19212.20-2008 Safety of power transformers, power supply units and similar products Part 20.Interference attenuation changes
Special requirements for pressure regulators;
---GB/T 19212.21-2014 Safety of transformers, reactors, power supply units and combinations thereof Part 21.Small reactors
special requirements and tests;
---GB/T 19212.24-2020 Safety of transformers, reactors, power supply units and their combinations Part 24.For use on construction sites
Special requirements and tests for transformers and power supply units;
---GB/T 19212.27-2017 Safety of transformers, reactors, power supply units and their combinations Part 27.Energy saving and others
Purpose. Special requirements and tests on transformers and power supply units.
This document replaces GB/T 19212.1-2016 "Safety of transformers, reactors, power supply units and their combinations - Part 1.General requirements
"Summation Test", compared with GB/T 19212.1-2016, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
---Added fully insulated winding (FIW) wire and its parameter table (see Chapter 19 and Table 23);
---Changed the creepage distance, electrical clearance and through-insulation distance (see Table 19, Table 20 and Table 21, Table 13, Table C.1 of the.2016 edition
and Table D.1);
---Added different overvoltage category usage symbols, symbols for altitudes higher than.2000m, symbols for damaged plug pins of power supply units and the latest
Low temperature symbol (see Table 1, 8.11 of the.2016 edition);
---Added simulated load method and mutual load method as alternative temperature measurement methods (see 14.1.2);
---The simulated load method and the mutual load method have been added to the short circuit and overload protection temperature measurement methods (see 15.1.2);
---The temperature values in Table 2 have been changed according to GB/T 34662-2017 (see Table 2, Table 1 of the.2016 version);
--- Added partial discharge test for transformers using FIW structure and reproducing peak voltage greater than 750V (see 18.3);
---Added structural requirements when using annular iron cores (see 19.12.3.1);
---Changed the requirements for enclosure protection level (IP code) (see Chapter 17, Chapter 17 of the.2016 edition);
---Increased the size of the transformer rectangular cross-section connector (see Appendix L);
---Added the requirement that the repeated dielectric strength test voltage value be 80% of the normal value (see Appendix C);
---Added vibration tests for transformers suitable for vehicles and railway equipment (see 16.5);
---Added the use of two Y1 capacitors when the operating voltage exceeds 250V but does not exceed 500V and overvoltage category III
Requirements for bridging (see 19.9).
This document is modified to adopt IEC 61558-1.2017 "Safety of transformers, reactors, power supply units and their combinations - Part 1.General requirements
Summation Test".
Compared with IEC 61558-1.2017, this document has many structural adjustments. Comparison list of structure number changes between two files
See Appendix A for the table.
Compared with IEC 61558-1.2017, there are many technical differences between this document and the clauses involved in the outer margins.
Straight single lines (|) are marked. A list of these technical differences and their causes is provided in Appendix B.
The following editorial changes have been made to this document.
---The content of the introduction has been adjusted and improved;
---Change IEC original text 3.1.1, 3.1.7, 3.1.9, 3.1.9.1.1, 3.1.9.2, 3.1.19, 3.1.20, 3.1.21, 3.2.1.2, 3.2.2, 3.2.3.
3.2.9, 3.2.12, 3.3.7, 3.3.9, 3.4.8, 3.4.9, 3.5.3.1, 3.5.7, 3.5.8, 3.5.11, 3.5.11.1, 3.5.11.2, 3.5.11.3、
3.5.11.4, 3.7.1, 3.7.1.1, 3.7.2, 3.7.4, 3.7.7, 3.7.8, 3.7.9, 3.7.11, 3.7.12.1, 3.7.12.2, 3.7.18, 3.7.twenty one
and "Note 1" in 3.8.2 are adjusted to "Note"; "Note" in 3.4.8 is deleted;
---Deleted 3.1.8, 3.1.17, 3.2.14 and 5.12 whose original IEC content was "blank";
---Chapter "1, 2, 3" and "Appendix M, Appendix N and Appendix P" mentioned in paragraph 3 of the original IEC text have been deleted in 4.2;
---Added mention of Appendix E in 5.15, 15.6, and 26.4;
---Deleted the clause numbers of the original IEC 7.6.1 and 7.6.2 and changed them to itemized form;
---Modified the voltages in Note 1, Note 2 and Note 3 in 8.1;
---Deleted the note in the "Description or Name" column in the last row of Table 1 of the original IEC text;
---Deleted the clause numbers of IEC original text 9.2.1.3.1 and 9.2.1.3.2, and changed them to itemized form;
---Correct the "simulated load method" in paragraph 2 of 14.1.1 and Note 1 to "simulated load method or mutual load method";
---Change K1 in equation (4) of 14.1.2.1 to K1;
---Deleted the column item symbol in the original IEC 14.1.3, and moved all the content starting from Table 2 after the column item to
14.1.1, and the standards mentioned in the "Note" at the end of Table 3 have been adjusted;
---Deleted the clause numbers in the original IEC 14.2.1~14.2.3 and changed them to itemized form;
---Adjusted the format of Table 5 in 15.1.1;
---Deleted the clause numbers of IEC original text 15.3.1~15.3.5 and changed them to itemized form;
---Deleted the clause number and note 1 of the original IEC 16.4.1, and adjusted its note 2 to the note of 16.4;
---Adjusted the format of Table 10 in 16.5.1;
---Adjust the "A~L" columns in the original IEC 17.1.2 to clause form, and adjust the format of Table 12;
---Deleted the clause number of IEC original text 18.3.1;
---Deleted the clause numbers of 19.1.4.3.1~19.1.4.3.3 in the original IEC text and changed them to itemized form;
---Replace the two contents of IEC 60384-14.2013 and its 3.4.2 in the original IEC text 19.8 with IEC 60384-14.2023 and its
The content of 8.4.2 is replaced;
--- Titles have been added to all clauses contained in the original IEC 19.12, and the listing form of 19.12.3.2 has been revised.
Adjustment;
---Added article titles to the original IEC text 20.1~20.12, and deleted the article numbers of 20.8.2.1 and 20.8.2.2;
---Replace IEC 60730-1 and IEC 60730-1.2013 in the original IEC text 20.8 with GB/T 14536.1 and
The corresponding content of GB/T 14536.1-2022 is replaced;
---Replace IEC 60691.2015 in the original IEC text 20.9.1 with IEC 60691.2023;
--- Added titles to the original IEC text 22.1~22.9, deleted the content noted in Table 16 of the original IEC text, and revised Figure 12
perfected;
---Corrected the table serial number mentioned in paragraph 1 of IEC original text 26.1 (added Table 22 corresponding to IEC original text Table 23);
---Adjust "Note 3" in the original IEC 26.1 to "Note 2";
---Deleted the footnotes and content of the original IEC Table 24;
---The items listed in Appendix B of the original IEC text have been adjusted, and the item serial numbers mentioned in the main text have been corrected;
---Deleted the note in the original K.2.5 (J.2.5 of this document);
---Introductory words have been added to the relevant provisions of Appendix M of the original IEC text, and the "Class I (II)" sub-map in Figure M.3 has been revised.
correct;
---Corrected sub-figure b) in the original IEC figure N.1;
---The references have been adjusted and the index of the original IEC text has been deleted.
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is proposed by the China Electrical Equipment Industry Association.
This document is sponsored by the National Technical Committee for Standardization of Small Power Transformers, Reactors, Power Supply Units and Similar Products (SAC/TC418)
Return to home.
This document was drafted by. China Electronics Technology Standardization Institute, Shenyang Transformer Research Institute Co., Ltd., Beijing Teruit Testing Technology
Service Co., Ltd., Tongling Ruibo Electronic Technology Co., Ltd., Dongguan Mingpu Opto-Magnetic Co., Ltd., Zhongshan Baolijin Electronics Co., Ltd.
Company, Wenzhou Chint Power Electric Co., Ltd., Tianjin Optoelectronics Huigao Electronics Co., Ltd., Dongguan Dazhong Electronics Co., Ltd., Quzhou Sanyuanhui
Neng Electronics Co., Ltd., Guangdong Dianbang New Energy Technology Co., Ltd., and Shenzhen Electrical Equipment Research Institute.
The main drafters of this standard. Guo Jianyu, Zhang Xianzhong, Liu Li, Li Xinman, Yang Jianmin, Lin Junrong, Li Yuzhen, Wang Xin, Li Hui, Li Dongbo,
Li Zhengzhong, Hu Wenkang, Wang Lishu, Liu Yunzhu, Xiao Minying.
The previous versions of this document and the documents it replaces are as follows.
---First published as GB 19212.1-2003 in.2003, revised for the first time in.2008, and revised for the second time in.2016 as GB/T 19212.1-
2016;
---This is the third revision.
Introduction
The series of standards "Safety of Transformers, Reactors, Power Supply Devices and Their Combinations" are formulated to provide safety standards for rated power supply voltages not exceeding AC
Establish a set of best evaluations for transformers, reactors, power supply units and their combination products with 1000V and rated power frequency not exceeding 500Hz
Guidelines provide guidance on safety matters that need to be paid attention to in material selection, design, production and inspection of related products, and provide guidance for the development of related products.
Provide technical basis for exhibition certification work. GB/T 19212 aims to establish the equipment applicable to transformers, reactors, power supply units and their combination products.
It is planned to consist of 20 parts to comply with the principles and relevant rules in design, manufacturing and testing.
---GB/T 19212.1 Safety of transformers, reactors, power supply units and their combinations Part 1.General requirements and tests. Head
The purpose is to establish the overall general technical requirements and test requirements for the products covered by the GB/T 19212 series of standards.
---GB/T 19212.2 Safety of power transformers, power supplies, reactors and similar products Part 2.General purpose separation transformer
Special requirements and tests for power supplies with insulators and built-in separation transformers. The purpose is to establish general purpose separation transformers and built-in
Power supplies from transformers that have special technical requirements and test requirements not included in Part 1 or inconsistent with them.
---GB/T 19212.3 Safety of power transformers, power supplies, reactors and similar products Part 3.Control transformers and interior fittings
Special requirements and tests for power supplies from control transformers. The purpose is to establish the power supply of the control transformer and the built-in control transformer.
Special technical requirements and test requirements not included in Part 1 or inconsistent with them.
---GB/T 19212.4 Safety of transformers, reactors, power supply units and their combinations Part 4.Gas and oil burner points
Special requirements and tests for fire transformers. The purpose is to establish that gas and oil burner ignition transformers not covered in Part 1
include or are inconsistent with special technical requirements and test requirements.
---GB/T 19212.5 Safety of transformers, reactors, power supply units and similar products with power supply voltage of 1100V and below
Part 5.Special requirements and tests for isolating transformers and power supply units incorporating isolating transformers. The purpose is to establish isolation
Transformers and power supply units with built-in isolating transformers that have special technical requirements and tests that are not included in Part 1 or are inconsistent with them.
inspection requirements.
---GB/T 19212.6 Safety of transformers, reactors, power supply units and their combinations Part 6.Shaver transformers, shaving
Special requirements and tests for power supply units for shavers and power supply units for shavers. The purpose is to establish transformers for shavers, shaving
Special technical requirements and tests for knife power supply units and shaver power supply units not included in Part 1 or inconsistent with them
Require.
---GB/T 19212.7 Safety of transformers, reactors, power supply units and similar products with power supply voltage of 1100V and below
Part 7.Special requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers. The purpose is
Establishment of safety isolating transformers and power supply installations with built-in safety isolating transformers not covered by or inconsistent with Part 1
Special technical requirements and test requirements.
---GB/T 19212.8 Safety of power transformers, power supplies, reactors and similar products Part 8.Transformers and power supplies for toys
Special requirements and testing of sources. The purpose is to establish that transformers and power supplies for toys are not included in Part 1 or are inconsistent with them.
special technical requirements and test requirements.
---GB/T 19212.9 Safety of transformers, reactors, power supply units and their combinations Part 9.Electric bells and clock transformers and
Special requirements and tests for power supply units. The purpose is to establish that electric bells and bell transformers and power supply units are not covered by Part 1.
include or are inconsistent with special technical requirements and test requirements.
---GB/T 19212.10 Safety of transformers, reactors, power supply units and their combinations - Part 10.For Class III portable tungsten filament lamps
Special requirements and tests for transformers and power supply units. The purpose is to establish the requirements for transformers and power supply devices for Class III portable tungsten lamps.
Special technical requirements and test requirements not included in Part 1 or inconsistent with them.
---GB/T 19212.11 Safety of transformers, reactors, power supply units and their combinations - Part 11.High insulation level separation transformers
Special requirements and tests for transformers and isolation transformers with output voltages exceeding 1000V. The purpose is to establish high insulation level classification
Isolation transformers and isolating transformers with output voltages exceeding 1000 V have special techniques not covered by or inconsistent with Part 1.
technical requirements and test requirements.
---GB/T 19212.13 Safety of transformers, reactors, power supply units and their combinations - Part 13.Constant voltage transformers and power supplies
Special requirements and tests for installations. The purpose is to establish that constant voltage transformers and power supply units are not covered by or are inconsistent with Part 1.
Consistent special technical requirements and test requirements.
---GB/T 19212.14 Safety of transformers, reactors, power supply units and similar products with power supply voltage of 1100V and below
Part 14.Particular requirements and tests for autotransformers and power supply units incorporating autotransformers. The purpose is to ensure
Special technical requirements for independent autotransformers and power supply units with built-in autotransformers that are not included in Part 1 or are inconsistent with them.
Sum test requirements.
---GB/T 19212.15 Safety of transformers, reactors, power supply units and their combinations - Part 15.Voltage regulators and built-in voltage regulators
Special requirements and tests for the power supply unit of the device. The purpose is to establish that voltage regulators and power supply units with built-in voltage regulators are specified in Part 1
Special technical requirements and test requirements not included in or inconsistent with them.
---GB/T 19212.16 Safety of transformers, reactors, power supply devices and their combinations Part 16.Partitions for power supply in medical places
Special requirements and tests for transformers. The purpose is to establish that isolation transformers for power supply in medical premises are not included in Part 1
or special technical requirements and test requirements that are inconsistent with them.
---GB/T 19212.17 Safety of transformers, reactors, power supply units and similar products with power supply voltage of 1100V and below
Part 17.Particular requirements and tests for switching power supply units and transformers for switching power supply units. The purpose is
Establish special technologies for switching power supply units and transformers for switching power supply units that are not included in Part 1 or are inconsistent with them
technical requirements and test requirements.
---GB/T 19212.20 Safety of power transformers, power supply units and similar products Part 20.Interference attenuation transformers
special requirements. The purpose is to establish special technical requirements for interference attenuation transformers not included in Part 1 or inconsistent with them
and test requirements.
---GB/T 19212.21 Safety of transformers, reactors, power supply units and their combinations Part 21.Special requirements for small reactors
requirements and testing. The purpose is to establish special technical requirements and requirements for small reactors that are not included in Part 1 or are inconsistent with them.
Test requirements.
---GB/T 19212.24 Safety of transformers, reactors, power supply units and their combinations Part 24.Transformers for construction sites
and special requirements and tests for power supply units. The purpose is to establish that transformers and power supply installations for use on construction sites are not covered by Part 1.
Includes or is inconsistent with special technical requirements and test requirements.
---GB/T 19212.27 Safety of transformers, reactors, power supply units and their combinations - Part 27.For energy saving and other purposes
Special requirements and tests for transformers and power supply units. The purpose is to establish the use of transformers and power supply units for energy saving and other purposes in
Special technical requirements and test requirements not included in Part 1 or inconsistent with them.
GB/T 19212 stipulates through 20 parts that the rated power supply voltage of various types shall not exceed AC 1000V, and the rated power frequency shall not exceed
Safety requirements and test requirements for electrical, temperature and mechanical aspects of 500Hz transformers, reactors, power supply units and their combination products
beg. By establishing clear scope, terminology, technical requirements and test requirements for various products, it allows producers, users and testers of related products to
Operators can operate more clearly and accurately, thus laying the foundation for designing and manufacturing high-quality, safe and reliable products.
Other parts of GB/T 19212 are developed on the basis of this document and used in conjunction with this document. Others of GB/T 19212
The part is to supplement and modify the corresponding chapters and articles of GB/T 19212.1 in order to convert the contents of GB/T 19212.1 into their respective parts.
Content.
This document covers the safety requirements for transformers. When the term "transformer" is used, wherever appropriate, the term refers to the transformer, reactance
controller and power supply unit.
During the preparation of this document, IEC 60364 (all parts) "Low-voltage electrical installations" was taken into account wherever possible so that the transformers comply with this document.
Install according to specified wiring procedures.
If a transformer that meets the requirements of this document is found to have other characteristics that would impair the safety level specified in these requirements during inspection and testing,
If it is flat, it may not necessarily be judged that the transformer complies with the safety principles of this document.
When the materials used or the structural type of the transformer are different from those specified in this document, the requirements of this document shall be followed.
After inspection and testing, if it is found to be substantially equivalent, the transformer will be judged to comply with the safety principles of this document.
The non-safety standard involving electromagnetic compatibility (EMC) of transformers is GB/T 21419 "Transformers, power supply units, reactors and their
Electromagnetic compatibility (EMC) requirements for similar products". However, the standard also includes tests that subject the transformer to conditions relevant to safety aspects.
The purpose of this document is to set out a set of requirements and tests that are considered to be generally applicable to most types of transformers and which
and tests can be cited by other parts of GB/T 19212 as needed. Therefore, this document cannot be considered a
This specification is applicable to all transformers. It is only applicable to those special types of transformers specified in other parts of GB/T 19212.
The other parts of GB/T 19212 used in conjunction with this document only include the requirements for the transformers applicable to that part, and do not include
The remaining parts apply to the contents of the transformer. For transformers with protection class IP00 and supporting transformers, it is possible to use them in the same structure
Have circuits that comply with the provisions of other different parts of GB/T 19212 (for example, its SELV output circuit complies with the provisions of GB/T 19212.7
and output circuit comply with GB/T 19212.5 regulations). However, if a transformer involves other parts of GB/T 19212, it must be
Within a reasonable scope, for each function and/or use, the corresponding part of GB/T 19212 is adopted. If applicable, a function
The impact on other functions should also be considered.
For a special transformer or a certain type of transformer, if there are no applicable other parts of GB/T 19212, then the
Use the part that is closest to the application and use its requirements and tests as a guide.
Consideration should be given to extending the use of this document to transformers not mentioned in GB/T 19212 (all parts) and those designed according to new principles.
transformer.
If the requirements in any chapter of other parts of GB/T 19212 are quoted in this article with the phrase "this chapter of GB/T 19212.1 applies"
, this phrase indicates that all requirements in that chapter of this document apply (some requirements are clearly not applicable to special categories specified in other parts of this document).
type transformer).
The formulation principles of GB/T 19212 (all parts) are shown in Figure 1.
Figure 1 Principles for the formulation of GB/T 19212 (all parts)
The relevant provisions of the document (for example. provisions involving the thermal endurance test of windings) also apply to appliances that form an integral part but cannot
Transformers tested individually.
Safety of transformers, reactors, power supply units and combinations thereof
Part 1.General requirements and tests
1 Scope
This document specifies the electrical, temperature and mechanical safety requirements for transformers, reactors, power supply units and their combinations.
This document applies to the following independent and supporting standing or mobile dry-type transformers, power supplies (including switching power supplies), and reactors
and its combination of security domains. The windings may be enclosed or unencapsulated and they do not form part of the distribution network.
Note 1.The differences between transformers, power supply units and switching power supply units are as follows.
---For transformers, the frequency is not changed. However, a transformer (such as a constant voltage transformer) may have an internal resonant frequency not exceeding 30kHz;
---For power supply devices, the internal operating frequency and waveform are different from those of the power supply, and the internal operating frequency does not exceed 500Hz (see regulations
righteousness 3.1.17);
---For switching power supply devices, the internal operating frequency and waveform are different from those of the power supply, and the internal operating frequency exceeds 500Hz but does not
over 100MHz.
Other parts of GB/T 19212 can be found in the introduction of this document.
a) Stationary or mobile, single-phase or multi-phase, air-cooled (self-cooled or air-cooled), independent or supporting isolation transformer and safety
Isolation transformer has the following characteristics.
1) The rated power supply voltage does not exceed AC 1000V;
2) The rated power frequency does not exceed 500Hz.
And in addition to other provisions in other parts of GB/T 19212, values consistent with the following provisions.
1) For isolation transformer.
● The rated output of single-phase transformers does not exceed 25kV·A, and that of multi-phase transformers does not exceed 40kV·A;
● No-load output voltage and rated output voltage exceed AC 50V and do not exceed AC 500V, or wire according to the country
According to regulations or for a certain special purpose, the voltage shall not exceed AC 1000V.
2) For safety isolation transformer.
● The rated output of single-phase transformers does not exceed 10kV·A, and that of multi-phase transformers does not exceed 16kV·A;
● Between conductors or between any conductor and the protective earth, the no-load output voltage and the rated output voltage do not exceed
AC 50V.
Note 2.When installation regulations or electrical appliances (such as electric toys, electric bells, mobile electric tools, portable lamps) specifications require double insulation or reinforcement between circuits
When insulating, use an isolation transformer or safety isolation transformer.
b) Stationary or mobile, single-phase or multi-phase, air-cooled (self-cooled or air-cooled), independent or supporting separation transformer, autocoupler
Transformers, voltage regulators and small reactors with the following characteristics.
1) The rated power supply voltage does not exceed AC 1000V;
2) The rated power frequency does not exceed 500Hz.
And in addition to other provisions in other parts of GB/T 19212, values consistent with the following provisions.
1) For transformers that are both independent and supporting, the no-load output voltage and rated output voltage shall not exceed AC 15kV.
An independent transformer with a rated output voltage of not less than AC 50V;
2) The rated output does not exceed the following specified values.
● Single-phase transformer, 1kV·A;
● Single-phase reactor, 2kvar;
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