Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
GB/T 24338 consists of the following parts, under ther general title Railway Applications — Electromagnetic Compatibility:
— Part 1: General;
— Part 2: Emission of the Whole Railway System to the Outside World;
— Part 3-1: Rolling Stock — Train and Complete Vehicle;
— Part 3-2: Rolling Stock — Apparatus;
— Part 4: Emission and Immunity of the Signalling and Telecommunications Apparatus;
— Part 5: Emission and Immunity of Fixed Power Supply Apparatus and Systems.
This part is Part 3-2 of GB/T 24338.
This part is drafted in accordance with the rules given in the GB/T 1.1-2009.
This standard replaces the GB/T 24338.4-2009 Railway Applications — Electromagnetic Compatibility — Part 3-2: Rolling Stock — Apparatus in whole. The following technical deviations have been made with respect to the GB/T 24338.4-2009 (the previous edition).
— addition of the requirements for test report (see Clause 5);
— addition of measurement requirements, clarifying that no tests need to be performed at frequencies where no requirement is specified (see Clause 1);
— addition of general requirements for EMC (see Clause 6);
— removal of the measurement requirements for emissions from the 9 kHz to 0.15 MHz range in the table (see Clause 7 of Edition 2009);
— removal of Tables 1 and 2 (see Clause 7 of Edition 2009);
— modification of Table 3 to change the requirements for public use of AC power from the table note to the table entry requirements (see Table 1; Table 3 of Edition 2009);
— removal of Table 5 (see Clause 7 of Edition 2009);
— modification of the requirements for surge test of Table 7 (see Table 4; Table 7 of Edition 2009);
— modification of test grade of Table 9 (see Table 6; Table 9 of Edition 2009);
— addition of footnote a "For equipment mounted in all other areas, a severity level of 10 V/m may be used" (see Table 6).
This part has been redrafted and modified adoption of International Standard IEC 62236-3-2:2008 Railway Applications — Electromagnetic Compatibility — Part 3-2: Rolling Stock — Apparatus.
There are technical deviations between this part and the International Standard IEC 62236-3-2:2008, and such deviations have been marked by perpendicular single line (|) in the outer side page margin of the corresponding clauses. The specific technical deviations, together with their justifications, are given below:
— adjustment on technical deviations has been made in Normative References of this part so that the technical conditions in China are met; the adjustment is concentratedly reflected in Clause 2 Normative References, see the followings for details:
CISPR 16 (all parts) is replaced by GB/T 6113.101, GB/T 6113.104, GB/T 6113.201 and GB/T 6113.203, which are identical with the international standard;
CISPR 22 is replaced by GB/T 9254, which is identical with the international standard;
IEC 61000-4-2 is replaced by GB/T 17626.2, which is identical with the international standard;
IEC 61000-4-3 is replaced by GB/T 17626.3, which is identical with the international standard;
IEC 61000-4-4 is replaced by GB/T 17626.4, which is identical with the international standard;
IEC 61000-4-5 is replaced by GB/T 17626.5, which is identical with the international standard;
IEC 61000-4-6 is replaced by GB/T 17626.6, which is identical with the international standard;
IEC 62236-1:2008 is replaced by GB/T 24338.1-2018, which has been modified adoption of the international standard;
IEC 62236-3-1:2008 is replaced by GB/T 24338.3-2018, which has been modified adoption of the international standard;
addition of Normative References GB/T 4365, GB 17799.4-2012, GB/T 17626.30 and GB/T 25119.
— addition of general requirements for electromagnetics, clarifying that frequencies that are not required are not tested. Removal of the impact test factors, emission and immunity requirements for rolling stock equipment (see Clause 1);
— removal of the content for relevant tests of emission-traction a.c. and d.c. power ports;
— removal of the content of 9 kHz to 0.15 MHz range in Tables 1, 2 and 3, as no specific limit requirements have been specified;
— addition of measurement requirements for enclosure port emission from 1 GHz to 6 GHz to accommodate the development of electronic devices (see Clause 1);
— removal of Table 5, the port required in the table is covered in the control cabinet, and its electromagnetic compatibility is guaranteed by the cabinet;
— modification of the requirements for surge test and further refinement of the test requirements to accommodate technological developments (see Clause 7);
— addition of test requirements for port cable length; perfection of test methods to improve test repeatability (see Clause 7);
— modification of the frequency division of the radio frequency electromagnetic field radiation test of the digital communication device of the Enclosure port to adapt to the development of the test method (see Clause 7);
— modification of the form and content of table notes in Tables 1 to 6, changing of the note to a footnote and updating the number in the order of reference to meet the application needs of the railway industry in China (see Clauses 6 and 7).
For the purposes of this part, the following editorial changes have also been made:
— incorporate the requirements of test report into Part 5 of this standard;
— removal of Tables 1 and 2 of IEC 62236-3-2:2008, as no specific limit requirements have been specified;
— modification of Table 5 of IEC 62236-3-2:2008, which is merged with Table 2 of this part;
— removal of descriptions of research and technological developments on conduction and radiated emissions in various tables;
— removal of table notes 3 and 4 in Table9 of IEC 62236-3-2:2008;
— Addition of reference document EN 50121-3-2:2015.
Attention is drawn to the possibility that some of the content of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all of such patent rights.
This part was proposed by National Railway Administration of the People's Republic of China.
This part is under the jurisdiction of SAC/TC 278 (National Technical Committee 278 on Traction Electrical Apparatus and System of Standardization Administration of China).
Drafting organizations of this part: Zhuzhou CRRC Times Electric Co., Ltd., Standards and Metrology Institute of China Academy of Railway Sciences, CRRC Qingdao Sifang Locomotive & Rolling Stock Co., Ltd., CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd., Beijing Jiaotong University and Institute of Communication Signals of China Academy of Railway Sciences.
Chief drafting staff of this part: Wang Yimin, Song Rui, Wang Qiuhua, Xiao Shi, Song Xiaozhong, Nie Xiaobo and Li Tianshi.
The previous editions of this part are as follows:
— GB/T 24338.4-2009.
Railway Applications — Electromagnetic Compatibility — Part 3-2: Rolling Stock — Apparatus
1 Scope
This part of GB/T 24338 specifies the emission and immunity requirements of electromagnetic compatibility (EMC) for electrical and electronic apparatus intended for use on railway rolling stock. This part is applicable to the integration of apparatus on rolling stock.
The frequency range considered is from d.c. to 400 GHz. No measurements need to be performed at frequencies where no requirement is specified.
The application of tests shall depend on the particular apparatus, its configuration, its ports, its technology and its operating conditions.
This part takes into account the internal environment of the railway rolling stock and the external environment of the railway, and interference to the apparatus from equipment such as hand-held radio transmitters.
The radiation emission requirements specified in this part does not apply to intentional emission of radio transmitter defined by ITU.
The limits for immunity are not applicable to the excluded frequency bands specified in the EMC related standards for wireless devices.
This part does not apply to transient emissions when starting or stopping the apparatus.
Emission requirements have been selected so as to ensure that disturbances generated by the apparatus operated normally on railway rolling stock do not exceed a level which could prevent other apparatus from operating as intended.
Likewise, the immunity requirements have been selected so as to ensure an adequate level of immunity for rolling stock apparatus. The levels do not however cover extreme cases which may occur with an extremely low probability of occurrence in any location. Specific requirements which deviate from this part shall be specified.
Test requirements are specified for each port considered.
These specific provisions are to be used in conjunction with the general provisions in GB/T 24338.1.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 4365 Electrotechnical Terminology — Electromagnetic Compatibility [GB/T 4365-2003, IEC 60050(161):1990, IDT]
GB/T 6113.101 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods — Part 1-1: Radio Disturbance and Immunity Measuring Apparatus — Measuring Apparatus (GB/T 6113.101-2016, CISPR 16-1-1:2010, IDT)
GB/T 6113.104 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods — Part 1-4: Radio Disturbance and Immunity Measuring Apparatus — Antennas and Test Sites for Radiated Disturbance Measurements (GB/T 6113.104-2016, CISPR 16-1-4:2012, IDT)
GB/T 6113.201 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods — Part 2-1: Methods of Measurement of Disturbances and Immunity — Conducted Disturbance Measurements (GB/T 6113.201-2017, CISPR 16-2-1:2010, IDT)
GB/T 6113.203 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods — Part 2-3: Methods of Measurement of Disturbances and Immunity — Radiated Disturbance Measurements (GB/T 6113.203-2016, CISPR 16-2-3:2010, IDT)
GB/T 9254 Information Technology Equipment — Radio Disturbance Characteristics — Limits and Methods of Measurement (GB/T 9254-2008, IEC/CISPR 22:2006, IDT)
GB/T 17626.2 Electromagnetic Compatibility — Testing and Measurement Techniques- Electrostatic Discharge Immunity Test (GB/T 17626.2-2006, IEC 61000-4-2:2001, IDT)
GB/T 17626.3 Electromagnetic Compatibility — Testing and Measurement Techniques — Radiated Radio-frequency Electromagnetic Field Immunity Test (GB/T 17626.3-2016, IEC 61000-4-3:2010, IDT)
GB/T 17626.4 Electromagnetic Compatibility — Testing and Measurement Techniques — Electrical Fast Transient/Burst Immunity Test (GB/T 17626.4-2008, IEC 61000-4-4:2004, IDT)
GB/T 17626.5 Electromagetic Compatibility — Testing and Measurement Techniques — Surge (Impact) Immunity Test (GB/T 17626.5-2008, IEC 61000-4-5:2005, IDT)
GB/T 17626.6 Electromagetic Compatibility — Testing and Measurement Techniques — Immunity to Conducted Disturbances, Induced by Radio-frequency Fields (GB/T 17626.6-2017, IEC 61000-4-6:2013, IDT)
GB/T 17626.30 Electromagnetic Compatibility — Testing and Measurement Techniques — Power Quality Measurement Methods
GB 17799.4-2012 Electromagnetic Compatibility (EMC) — Generic Standards — Emission Standard for Industrial Environments (IEC 61000-6-4:2011, IDT)
GB/T 24338.1-2018 Railway Applications — Electromagnetic Compatibility — Part 1: General (IEC 62236-1:2008, MOD)
GB/T 24338.3 Railway Applications — Electromagnetic Compatibility — Part 3-1: Rolling Stock — Train and Complete Vehicle (GB/T 24338.3-2018, IEC 62236-3-1:2008, MOD)
GB/T 25119 Railway Applications — Electronic Equipments Used on Rail Vehicles
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 4365 and the following apply.
3.1
rolling stock apparatus
finished product with an intrinsic function intended for implementation into the rolling stock installation
3.2
port
the particular interface of the specified apparatus with the external environment, for example a.c. power port, d.c. power port, I/O (input/output) port
3.3
enclosure port
the physical boundary of the apparatus through which electromagnetic fields may radiate or impinge (see Figure 1). Typical examples of rolling stock apparatus with their ports are listed in Annex A.
Figure 1 Main Categories of Ports
4 Performance Criteria
A functional description and a definition of performance criteria, during or as a consequence of the EMC testing, shall be provided by the manufacturer and noted in the test report, based on the criteria A, B, C defined in GB/T 24338.1-2018.
Note: The variety and the diversity of the apparatus within the scope of this part make it difficult to define precise criteria for the evaluation of the immunity test results.
5 Test Conditions
It is not always possible to test every function of the apparatus. The tests shall be made at a typical operating mode considered by the manufacturer to produce the largest emission or maximum susceptibility to noise as appropriate in the frequency band being investigated consistent with normal applications. The manufacturer shall define the conditions during testing in a test plan. The configuration and mode of operation shall be specified in the test plan and the actual conditions, during the tests, shall be precisely noted in the test report, which shall be in accordance with GB/T 17626.2 to GB/T 17626.6.
If the apparatus is part of a system, or can be connected to auxiliary apparatus, then the apparatus shall be tested while connected to the minimum configuration of auxiliary apparatus necessary to exercise the ports in accordance with GB/T 9254.
If the apparatus has a large number of similar ports or ports with many similar connections, then a sufficient number shall be selected to simulate actual operating conditions and to ensure that all the different types of termination are covered (e.g. 20% of the ports or at least four ports).
The tests shall be carried out within the specified operating range for the apparatus and at its rated supply voltage, unless otherwise indicated in the basic standard specified in Clause 7.
Foreword II
1 Scope
2 Normative References
3 Terms and Definitions
4 Performance Criteria
5 Test Conditions
6 Emission Tests and Limits
7 Immunity Tests and Limits
Annex A (Informative) Examples of Apparatus and Ports
Annex B (Informative) Conducted Disturbances Generated by Power Converters
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
GB/T 24338 consists of the following parts, under ther general title Railway Applications — Electromagnetic Compatibility:
— Part 1: General;
— Part 2: Emission of the Whole Railway System to the Outside World;
— Part 3-1: Rolling Stock — Train and Complete Vehicle;
— Part 3-2: Rolling Stock — Apparatus;
— Part 4: Emission and Immunity of the Signalling and Telecommunications Apparatus;
— Part 5: Emission and Immunity of Fixed Power Supply Apparatus and Systems.
This part is Part 3-2 of GB/T 24338.
This part is drafted in accordance with the rules given in the GB/T 1.1-2009.
This standard replaces the GB/T 24338.4-2009 Railway Applications — Electromagnetic Compatibility — Part 3-2: Rolling Stock — Apparatus in whole. The following technical deviations have been made with respect to the GB/T 24338.4-2009 (the previous edition).
— addition of the requirements for test report (see Clause 5);
— addition of measurement requirements, clarifying that no tests need to be performed at frequencies where no requirement is specified (see Clause 1);
— addition of general requirements for EMC (see Clause 6);
— removal of the measurement requirements for emissions from the 9 kHz to 0.15 MHz range in the table (see Clause 7 of Edition 2009);
— removal of Tables 1 and 2 (see Clause 7 of Edition 2009);
— modification of Table 3 to change the requirements for public use of AC power from the table note to the table entry requirements (see Table 1; Table 3 of Edition 2009);
— removal of Table 5 (see Clause 7 of Edition 2009);
— modification of the requirements for surge test of Table 7 (see Table 4; Table 7 of Edition 2009);
— modification of test grade of Table 9 (see Table 6; Table 9 of Edition 2009);
— addition of footnote a "For equipment mounted in all other areas, a severity level of 10 V/m may be used" (see Table 6).
This part has been redrafted and modified adoption of International Standard IEC 62236-3-2:2008 Railway Applications — Electromagnetic Compatibility — Part 3-2: Rolling Stock — Apparatus.
There are technical deviations between this part and the International Standard IEC 62236-3-2:2008, and such deviations have been marked by perpendicular single line (|) in the outer side page margin of the corresponding clauses. The specific technical deviations, together with their justifications, are given below:
— adjustment on technical deviations has been made in Normative References of this part so that the technical conditions in China are met; the adjustment is concentratedly reflected in Clause 2 Normative References, see the followings for details:
CISPR 16 (all parts) is replaced by GB/T 6113.101, GB/T 6113.104, GB/T 6113.201 and GB/T 6113.203, which are identical with the international standard;
CISPR 22 is replaced by GB/T 9254, which is identical with the international standard;
IEC 61000-4-2 is replaced by GB/T 17626.2, which is identical with the international standard;
IEC 61000-4-3 is replaced by GB/T 17626.3, which is identical with the international standard;
IEC 61000-4-4 is replaced by GB/T 17626.4, which is identical with the international standard;
IEC 61000-4-5 is replaced by GB/T 17626.5, which is identical with the international standard;
IEC 61000-4-6 is replaced by GB/T 17626.6, which is identical with the international standard;
IEC 62236-1:2008 is replaced by GB/T 24338.1-2018, which has been modified adoption of the international standard;
IEC 62236-3-1:2008 is replaced by GB/T 24338.3-2018, which has been modified adoption of the international standard;
addition of Normative References GB/T 4365, GB 17799.4-2012, GB/T 17626.30 and GB/T 25119.
— addition of general requirements for electromagnetics, clarifying that frequencies that are not required are not tested. Removal of the impact test factors, emission and immunity requirements for rolling stock equipment (see Clause 1);
— removal of the content for relevant tests of emission-traction a.c. and d.c. power ports;
— removal of the content of 9 kHz to 0.15 MHz range in Tables 1, 2 and 3, as no specific limit requirements have been specified;
— addition of measurement requirements for enclosure port emission from 1 GHz to 6 GHz to accommodate the development of electronic devices (see Clause 1);
— removal of Table 5, the port required in the table is covered in the control cabinet, and its electromagnetic compatibility is guaranteed by the cabinet;
— modification of the requirements for surge test and further refinement of the test requirements to accommodate technological developments (see Clause 7);
— addition of test requirements for port cable length; perfection of test methods to improve test repeatability (see Clause 7);
— modification of the frequency division of the radio frequency electromagnetic field radiation test of the digital communication device of the Enclosure port to adapt to the development of the test method (see Clause 7);
— modification of the form and content of table notes in Tables 1 to 6, changing of the note to a footnote and updating the number in the order of reference to meet the application needs of the railway industry in China (see Clauses 6 and 7).
For the purposes of this part, the following editorial changes have also been made:
— incorporate the requirements of test report into Part 5 of this standard;
— removal of Tables 1 and 2 of IEC 62236-3-2:2008, as no specific limit requirements have been specified;
— modification of Table 5 of IEC 62236-3-2:2008, which is merged with Table 2 of this part;
— removal of descriptions of research and technological developments on conduction and radiated emissions in various tables;
— removal of table notes 3 and 4 in Table9 of IEC 62236-3-2:2008;
— Addition of reference document EN 50121-3-2:2015.
Attention is drawn to the possibility that some of the content of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all of such patent rights.
This part was proposed by National Railway Administration of the People's Republic of China.
This part is under the jurisdiction of SAC/TC 278 (National Technical Committee 278 on Traction Electrical Apparatus and System of Standardization Administration of China).
Drafting organizations of this part: Zhuzhou CRRC Times Electric Co., Ltd., Standards and Metrology Institute of China Academy of Railway Sciences, CRRC Qingdao Sifang Locomotive & Rolling Stock Co., Ltd., CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd., Beijing Jiaotong University and Institute of Communication Signals of China Academy of Railway Sciences.
Chief drafting staff of this part: Wang Yimin, Song Rui, Wang Qiuhua, Xiao Shi, Song Xiaozhong, Nie Xiaobo and Li Tianshi.
The previous editions of this part are as follows:
— GB/T 24338.4-2009.
Railway Applications — Electromagnetic Compatibility — Part 3-2: Rolling Stock — Apparatus
1 Scope
This part of GB/T 24338 specifies the emission and immunity requirements of electromagnetic compatibility (EMC) for electrical and electronic apparatus intended for use on railway rolling stock. This part is applicable to the integration of apparatus on rolling stock.
The frequency range considered is from d.c. to 400 GHz. No measurements need to be performed at frequencies where no requirement is specified.
The application of tests shall depend on the particular apparatus, its configuration, its ports, its technology and its operating conditions.
This part takes into account the internal environment of the railway rolling stock and the external environment of the railway, and interference to the apparatus from equipment such as hand-held radio transmitters.
The radiation emission requirements specified in this part does not apply to intentional emission of radio transmitter defined by ITU.
The limits for immunity are not applicable to the excluded frequency bands specified in the EMC related standards for wireless devices.
This part does not apply to transient emissions when starting or stopping the apparatus.
Emission requirements have been selected so as to ensure that disturbances generated by the apparatus operated normally on railway rolling stock do not exceed a level which could prevent other apparatus from operating as intended.
Likewise, the immunity requirements have been selected so as to ensure an adequate level of immunity for rolling stock apparatus. The levels do not however cover extreme cases which may occur with an extremely low probability of occurrence in any location. Specific requirements which deviate from this part shall be specified.
Test requirements are specified for each port considered.
These specific provisions are to be used in conjunction with the general provisions in GB/T 24338.1.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 4365 Electrotechnical Terminology — Electromagnetic Compatibility [GB/T 4365-2003, IEC 60050(161):1990, IDT]
GB/T 6113.101 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods — Part 1-1: Radio Disturbance and Immunity Measuring Apparatus — Measuring Apparatus (GB/T 6113.101-2016, CISPR 16-1-1:2010, IDT)
GB/T 6113.104 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods — Part 1-4: Radio Disturbance and Immunity Measuring Apparatus — Antennas and Test Sites for Radiated Disturbance Measurements (GB/T 6113.104-2016, CISPR 16-1-4:2012, IDT)
GB/T 6113.201 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods — Part 2-1: Methods of Measurement of Disturbances and Immunity — Conducted Disturbance Measurements (GB/T 6113.201-2017, CISPR 16-2-1:2010, IDT)
GB/T 6113.203 Specification for Radio Disturbance and Immunity Measuring Apparatus and Methods — Part 2-3: Methods of Measurement of Disturbances and Immunity — Radiated Disturbance Measurements (GB/T 6113.203-2016, CISPR 16-2-3:2010, IDT)
GB/T 9254 Information Technology Equipment — Radio Disturbance Characteristics — Limits and Methods of Measurement (GB/T 9254-2008, IEC/CISPR 22:2006, IDT)
GB/T 17626.2 Electromagnetic Compatibility — Testing and Measurement Techniques- Electrostatic Discharge Immunity Test (GB/T 17626.2-2006, IEC 61000-4-2:2001, IDT)
GB/T 17626.3 Electromagnetic Compatibility — Testing and Measurement Techniques — Radiated Radio-frequency Electromagnetic Field Immunity Test (GB/T 17626.3-2016, IEC 61000-4-3:2010, IDT)
GB/T 17626.4 Electromagnetic Compatibility — Testing and Measurement Techniques — Electrical Fast Transient/Burst Immunity Test (GB/T 17626.4-2008, IEC 61000-4-4:2004, IDT)
GB/T 17626.5 Electromagetic Compatibility — Testing and Measurement Techniques — Surge (Impact) Immunity Test (GB/T 17626.5-2008, IEC 61000-4-5:2005, IDT)
GB/T 17626.6 Electromagetic Compatibility — Testing and Measurement Techniques — Immunity to Conducted Disturbances, Induced by Radio-frequency Fields (GB/T 17626.6-2017, IEC 61000-4-6:2013, IDT)
GB/T 17626.30 Electromagnetic Compatibility — Testing and Measurement Techniques — Power Quality Measurement Methods
GB 17799.4-2012 Electromagnetic Compatibility (EMC) — Generic Standards — Emission Standard for Industrial Environments (IEC 61000-6-4:2011, IDT)
GB/T 24338.1-2018 Railway Applications — Electromagnetic Compatibility — Part 1: General (IEC 62236-1:2008, MOD)
GB/T 24338.3 Railway Applications — Electromagnetic Compatibility — Part 3-1: Rolling Stock — Train and Complete Vehicle (GB/T 24338.3-2018, IEC 62236-3-1:2008, MOD)
GB/T 25119 Railway Applications — Electronic Equipments Used on Rail Vehicles
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 4365 and the following apply.
3.1
rolling stock apparatus
finished product with an intrinsic function intended for implementation into the rolling stock installation
3.2
port
the particular interface of the specified apparatus with the external environment, for example a.c. power port, d.c. power port, I/O (input/output) port
3.3
enclosure port
the physical boundary of the apparatus through which electromagnetic fields may radiate or impinge (see Figure 1). Typical examples of rolling stock apparatus with their ports are listed in Annex A.
Figure 1 Main Categories of Ports
4 Performance Criteria
A functional description and a definition of performance criteria, during or as a consequence of the EMC testing, shall be provided by the manufacturer and noted in the test report, based on the criteria A, B, C defined in GB/T 24338.1-2018.
Note: The variety and the diversity of the apparatus within the scope of this part make it difficult to define precise criteria for the evaluation of the immunity test results.
5 Test Conditions
It is not always possible to test every function of the apparatus. The tests shall be made at a typical operating mode considered by the manufacturer to produce the largest emission or maximum susceptibility to noise as appropriate in the frequency band being investigated consistent with normal applications. The manufacturer shall define the conditions during testing in a test plan. The configuration and mode of operation shall be specified in the test plan and the actual conditions, during the tests, shall be precisely noted in the test report, which shall be in accordance with GB/T 17626.2 to GB/T 17626.6.
If the apparatus is part of a system, or can be connected to auxiliary apparatus, then the apparatus shall be tested while connected to the minimum configuration of auxiliary apparatus necessary to exercise the ports in accordance with GB/T 9254.
If the apparatus has a large number of similar ports or ports with many similar connections, then a sufficient number shall be selected to simulate actual operating conditions and to ensure that all the different types of termination are covered (e.g. 20% of the ports or at least four ports).
The tests shall be carried out within the specified operating range for the apparatus and at its rated supply voltage, unless otherwise indicated in the basic standard specified in Clause 7.
Contents of GB/T 24338.4-2018
Foreword II
1 Scope
2 Normative References
3 Terms and Definitions
4 Performance Criteria
5 Test Conditions
6 Emission Tests and Limits
7 Immunity Tests and Limits
Annex A (Informative) Examples of Apparatus and Ports
Annex B (Informative) Conducted Disturbances Generated by Power Converters
