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GB/T 21437.3-2021 PDF English

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GB/T 21437.3-2021: Road vehicles - Test method of electrical disturbances from conduction and coupling - Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines
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GB/T 21437.3: Historical versions

Standard IDUSDBUY PDFDeliveryStandard Title (Description)Status
GB/T 21437.3-2021365 Add to Cart Auto, 9 seconds. Road vehicles - Test method of electrical disturbances from conduction and coupling - Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines Valid
GB/T 21437.3-2012150 Add to Cart Auto, 9 seconds. Road vehicles -- Electrical disturbances from conduction and coupling -- Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines Obsolete

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GB/T 21437.3-2021: Road vehicles - Test method of electrical disturbances from conduction and coupling - Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines



---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT21437.3-2021
NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.040.10 CCS T 35 Replacing GB/T 21437.3-2012 Issued on. DECEMBER 31, 2021 Implemented on. JULY 01, 2022 Issued by. State Administration for Market Regulation; Standardization Administration of PRC.

Table of Contents

Foreword... 3 Introduction... 6 1 Scope... 7 2 Normative references... 7 3 Terms and definitions... 7 4 Test methods... 8 4.1 Overview... 8 4.2 Standard test conditions... 9 4.3 Grounding plate... 9 4.4 Test arrangement... 9 4.5 Capacitive coupling clamp method... 10 4.6 Direct capacitor coupling method... 12 4.7 Inductive coupling clamp method... 17 5 Test device... 19 5.1 Power... 19 5.2 Oscilloscope and probes... 19 5.3 Transient pulse generator... 19 5.4 Capacitive coupling clamp... 23 5.5 Direct capacitor coupling... 24 5.6 Inductive coupling clamp... 25 Appendix A (Normative) Calibration fixtures for the ICC method... 26 Appendix B (Informative) Example of severity levels of test pulse... 27 B.1 General provisions... 27 B.2 Severity level of test pulse... 27 B.3 Application example of classification of test pulse's severity level... 28 Appendix C (Informative) Estimation of inductive coupling coefficients... 29

Foreword

This document was drafted in accordance with the provisions of GB/T 1.1-2020 "Directives for standardization - Part 1.Rules for the structure and drafting of standardizing documents". This document is Part 3 of GB/T 21437 "Road vehicles - Test method of electrical disturbances from conduction and coupling". The following Parts of GB/T 21437 has been released. - Part 1.Definitions and general considerations; - Part 2.Electrical transient conduction along supply lines only; - Part 3.Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines. This document replaces GB/T 21437.3-2012 "Road vehicles - Test method of electrical disturbances from conduction and coupling - Part 3.Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines". Compared with GB/T 21437.3-2012, except for structural adjustment and editorial changes, the main technical changes are as follows. - SIMPLIFY the Scope; MOVE the relevant content into 4.1 (see Chapter 1, 4.1; Chapter 1 of the 2012 edition); - In the Scope of application of the standard, DELETE the "42 V" electrical system (see Chapter 1; Chapter 1 of the 2012 edition); - CHANGE the thickness of the grounding plate, from "minimum 1 mm" to "minimum 0.5 mm" (see 4.3; 3.3 of the 2012 edition); - In the CCC test, CHANGE that "the length of the tested wiring harness shall not exceed 2 m" into that "the total length of the tested wiring harness is mm" (see 4.5.4; 3.4.2 of the 2012 edition); - In the DCC test, CHANGE that "the length of the wire harness shall be between 1000 mm and 2000 mm" into that "the length of the wire harness shall be mm" (see 4.6.4; 3.4.3 of the 2012 edition); - In the ICC test, CHANGE "Test harness (length ≤ 2 m)" into that "The length of the harness shall be mm" (see 4.7.3; 3.4.4 of the 2012 edition); - ADD the specific method and schematic diagram of DCC level calibration (see 4.6.3); - ADD the specific method and schematic diagram of ICC method level calibration (see 4.7.2; 3.4.4 of the 2012 edition); - CHANGE the test arrangement of DCC method, respectively giving different arrangement methods of fast pulse and slow pulse (see 4.6.4; 3.4.3 of the 2012 edition); - CHANGE the fast pulse from "fast pulse a, b" into "fast pulse 3a, 3b"; MAKE appropriate adjustment of the pulse parameters tr and td, to be consistent with pulses 3a and 3b in GB/T 21437.2 (see 5.3.3; 4.3.2 of the 2012 version); - For the slow pulse, CHANGE it from "slow pulse - positive pulse, negative pulse" into "slow pulse - positive pulse 2a, negative pulse 2a"; MAKE appropriate adjustment of the parameters tr, t1, to be consistent with the pulse 2a in GB/T 21437.2 (see 5.3.2; 4.3.3 of the 2012 edition). This document modifies and adopts ISO 7637-3.2016 "Road vehicles - Electrical disturbances from conduction and coupling - Part 3.Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines". The technical differences, between this document and ISO 7637-3.2016, as well as the reasons, are as follows. - MODIFY and SIMPLIFY the Scope, clarifying the electrical/electronic components for vehicles of categories M, N, O, L; - USE the normative reference GB/T 21437.1 to replace ISO 7637-1 (see Chapter 3), to adapt to the technical conditions in China and increase operability; - USE the normative reference GB/T 21437.2 to replace ISO 7637-2 (see 4.5.2, 5.2, 5.3.1), to adapt to the technical conditions in China and increase operability; - DELETE the "4.7.2 Generator verification" in ISO 7637-3.2016, which does not conform to Chinese expression habits and has no substantial content; POSTPONE the subsequent clauses accordingly; - USE the normative reference GB/T 33014.4 to replace ISO 11452-4 (see 4.7.3), to adapt to the technical conditions in China and increase operability; The following editorial changes have been made to this document. - COMBINE the descriptions of the two sub-graphs in Figure 3; CHANGE "2" to "2a", "4" to "4a", "6" to "6a", "7" to "8" in Figure 3a); CHANGE "2" to "2b", "4" to "4b", "6" to "6b" in Figure 3b); - ADJUST the title and numbering of Figures 4 and 5; - COMBINE the descriptions of the two sub-graphs in Figure 4; CHANGE "9" to "9a" in Figure 4a); CHANGE "9" to "9b" in Figure 4b); - COMBINE the descriptions of the two sub-graphs in Figure 5; CHANGE "9" to "10" in Figure 5a); CHANGE the footnotes "a, b" to "b, c" in Figure 5b); - Table 4 is not mentioned in the main text of ISO 7637-3.2016, which is supplemented in 5.3.2; - STANDARDIZE the headers of Table 4 and Table 5; - The main text of ISO 7637-3.2016 does not mention Appendix A; in this document, ADD "Appendix A -- Examples of calibration fixtures" in 4.7; - DELETE and ADJUST some repeated or redundant notes in Appendix B. PROVIDE notes for Category 1, Category 2, Category 3 of Appendix B, to facilitate understanding and use. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This document shall be under the jurisdiction of the National Automotive Standardization Technical Committee (SAC/TC 114). This document was first published in 2012.This is the first revision.

1 Scope

This document specifies a bench test method, for the immunity of electrical/electronic components to electrical transients, which are coupled to non-power lines.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, for dated references, only the version corresponding to the date applies to this document; for undated references, the latest version (including all amendments) is applicable to this document. GB/T 21437.1 Road vehicles - Test method of electrical disturbances from conduction and coupling - Part 1.Definitions and general considerations (GB/T 21437.1-2021, ISO 7637-1.2015, MOD) GB/T 21437.2 Road vehicles - Test method of electrical disturbances from conduction and coupling - Part 2.Electrical transient conduction along supply lines only (GB/T 21437.2-2021, ISO 7637-2.2011, MOD) GB/T 33014.4 Road vehicles - Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy - Part 4.Bulk current injection (BCI) (GB/T 33014.4-2016, ISO 11452-4.2005, MOD)

3 Terms and definitions

The terms and definitions, which are defined in GB/T 21437.1, apply to this document.

4 Test methods

The test needs to be carried out in a laboratory. The test transient pulse simulates fast and slow electrical transient disturbances, such as those caused by inductive load switching, relay contacts bouncing, etc. The test pulses, which are given in this Part, are typical pulses, reflecting the main characteristics of transient pulses, that may appear in the vehicle. The grounding plate shall be a metal sheet, which has a minimum thickness of 0.5 mm. The minimum width of the grounding plate shall be 1000 mm, OR the width below the entire test arrangement plus 200 mm, whichever is larger.

5 Test device

It shall use the power supply, which is specified in GB/T 21437.2. It shall use the oscilloscope and probe, which is specified in GB/T 21437.2. It shall use the pulse generator, which is specified in GB/T 21437.2. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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