GB/T 28046.2-2019 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 28046.2-2019 | English | 255 |
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Road vehicles -- Environmental conditions and testing for electrical and electronic equipment -- Part 2: Electrical loads
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| GB/T 28046.2-2011 | English | 125 |
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Road vehicles -- Environmental conditions and testing for electrical and electronic equipment -- Part 2: Electrical loads
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GB/T 28046.2-2019: Road vehicles -- Environmental conditions and testing for electrical and electronic equipment -- Part 2: Electrical loads
---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/GBT28046.2-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.10
T 36
Replacing GB/T 28046.2-2011
Road vehicles - Environmental conditions and testing
for electrical and electronic equipment - Part 2.
Electrical loads
(ISO 16750-2.2012, MOD)
Issued on. OCTOBER 18, 2019
Implemented on. MAY 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword... 3
1 Scope... 7
2 Normative references... 7
3 Terms and definitions... 7
4 Tests and requirements... 8
4.1 General... 8
4.2 Direct current supply voltage range... 8
4.3 Overvoltage... 9
4.4 Superimposed alternating voltage... 10
4.5 Slow decrease and increase of supply voltage... 12
4.6 Transient changes in supply voltage... 13
4.7 Reversed voltage... 21
4.8 Ground reference and supply offset... 21
4.9 Open circuit... 22
4.10 Short circuit protection... 23
4.11 Withstand voltage... 24
4.12 Insulation resistance... 25
Annex A (Informative) Origin of load dump in vehicle electrical systems... 26
Annex B (Normative) Test load dump pulse generator verification... 27
Annex C (Informative) Flammability test of plastic materials for parts in devices
and appliances... 28
Bibliography... 34
Foreword
GB/T 28046 "Road vehicles - Environmental conditions and testing for electrical
and electronic equipment" includes the following 5 parts.
- Part 1.General;
- Part 2.Electrical loads;
- Part 3.Mechanical loads;
- Part 4.Climatic loads;
- Part 5.Chemical loads.
This Part is Part 2 of GB/T 28046.
This Part is drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces GB/T 28046.2-2011 "Road vehicles - Environmental
conditions and testing for electrical and electronic equipment - Part 2.Electrical
loads". Compared with GB/T 28046.2-2011, the main technical changes of this
Part are as follows.
- ADD 18 V~32 V gear for d.c. power supply voltage range (see Table 2);
- Improve compliance criteria requirements for overvoltage test at room
temperature of 12 V system (see 4.3.1.2.3);
- ADD "All voltage curves are no-load"; ADD "The test harness should be a
real vehicle harness or may be determined by negotiation between the
supplier and the purchaser" (see 4.1);
- ADD "Severity 4"; CHANGE the previous "50 Hz~20 kHz" to "50 Hz~25
kHz"; UPDATE Figure 3 (see 4.4.2);
- ADD "or in steps not greater than 25 mV" (see 4.5.2);
- Delete "In the supply voltage range of Table 1 or Table 2, the functional
status shall be class A" (see 4.5.3 of the 2011 edition);
- ADD load dump related content (ADD Figure 8, Figure 9, Table 5, Table 6;
CHANGE the previous Table 5 to Table 7 accordingly) (see 4.6.4);
- Increase the functional class requirement from C to A (see 4.7.3);
- Delete the requirement to cut off the grounding (for safety reasons) (see
4.10.2.1 of the 2011 edition);
- Modify Figure 6 and Figure 7 and add a description of physical quantities
in the figures;
- Modify relevant parameters in Table 3 and Table 4;
- ADD Annex A (Informative) Origin of load dump in vehicle electrical systems
and Annex B (Normative) Test load dump pulse generator verification.
Adjust the previous Annex A to Annex C.
This Part uses the redraft law to modify and adopt ISO 16750-2.2012 "Road
vehicles - Environmental conditions and testing for electrical and electronic
equipment - Part 2.Electrical loads".
Compared with ISO 16750-2.2012, this Part is structurally adjusted as follows.
- Adjust the numbers of Annex A and Annex B, to meet the requirements of
standard writing;
- Adjust the suspended paragraph under B.3 to B.3.1 and change the
previous B.3.1 to B.3.2.
The technical differences between this Part and ISO 16750-2.2012 and their
causes are as follows.
- As for the normative references, this Part has adjusted the technical
differences, to adapt to the technical conditions of China. The adjustments
are mainly reflected in Clause 2 “Normative references”. The specific
adjustments are as follows.
Replace ISO 16750-1 with GB/T 28046.1 which modifies and adopts
the international standard;
Replace ISO 16750-4.2006 with GB/T 28046.4-2011 which modifies
and adopts the international standard;
Replace ISO 8820 (all parts) with GB/T 31465 (all parts). The degree
of consistency between the parts of the two standards is as follows.
GB/T 31465.1-2015 Road vehicles - Fuse-link - Part 1.Definitions
and general test requirements (ISO 8820-1.2008, MOD);
GB/T 31465.2-2015 Road vehicles - Fuse-link - Part 2.Users guide
(ISO 8820-2.2005, MOD);
GB/T 31465.3-2015 Road vehicles - Fuse-link - Part 3.Fuse-link
with blade type (ISO 8820-3.2010, MOD);
GB/T 31465.4-2015 Road vehicles - Fuse-link - Part 4.Fuse-links
with female contacts and bolt-in contacts (ISO 8820-4.2010, MOD);
GB/T 31465.5-2015 Road vehicles - Fuse-link - Part 5.Fuse-links
with axial terminals (strip fuse-links) (ISO 8820-5.2007, MOD);
GB/T 31465.6-2017 Road vehicles - Fuse-links - Part 6.Fuse-links
with bolt-in contacts with high voltage (ISO 8820-8.2012, MOD);
GB/T 31465.7-2017 Road vehicles - Fuse-links - Part 7.Fuse-links
with shortened tabs (ISO 8820-9.2014, MOD).
- ADD footnotes to Table 4, which is convenient for use and meets the
requirements for standard writing (see 4.6.3.2).
- In the text of the international standard, Annex A is not mentioned. In order
to meet the requirements for standard writing, add "see Annex A for the
origin" to 4.6.4.1.
- Because this Part does not include electromagnetic compatibility, delete the
descriptions of electromagnetic compatibility in the scope and documents
(see the international standard Clause 1 and Bibliography).
- Delete the unreasonable stipulation in the international standard 4.5.3 that
"The functional status inside the supply voltage range (see Table 1 or Table
2) shall be as specified in 4.2.3 (class A)".
- In order to improve the operability, add "The test harness should be a real
vehicle harness or may be determined by negotiation between the supplier
and the purchaser" to 4.1.
- ADD a note "For the definition of functional status class in each test
requirement, refer to GB/T 28046.1" to 4.1, to avoid repeated references to
GB/T 28046.1 in each subclause.
- MOVE the formula for calculating internal resistance in 4.6.4.2.2 to 4.6.4.2.1,
which is more logical.
- With reference to 4.6.4, add the description "(see GB/T 28046.1)" to the UA in 4.8.2.
- To avoid misunderstanding, delete "NOTE This is not a test for connectors"
in 4.9 of the international standard, because there are many tests that are
not suitable for connectors.
The following editorial changes have been made in this Part.
- For the convenience of viewing the figure, directly convert the numbers in
Figure 1 to text and delete the description of the numbers (see 4.4.2);
- ADD Annex C (Informative), providing relevant content of UL 94 applicable
to vehicles, to facilitate the understanding and implementation of the standard;
- Simplify the headers of Tables 5 and 6, to unify the presentation style with other tables.
This Part was proposed by Ministry of Industry and Information Technology of the PRC.
This Part shall be under the jurisdiction of National Technical Committee of Auto
Standardization (SAC/TC 114).
The previous editions of the standard replaced by this Part were released as follows.
- GB/T 28046.2-2011.
1 Scope
This Part of GB/T 28046 describes the electrical environmental loads of electrical and
electronic equipment on the vehicles and specifies the tests and requirements.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 28046.1 Road vehicles - Environmental conditions and testing for
electrical and electronic equipment - Part 1.General (GB/T 28046.1-2011,
ISO 16750-1.2006, MOD)
GB/T 28046.4-2011 Road vehicles - Environmental conditions and testing for
electrical and electronic equipment - Part 4.Climatic loads (ISO 16750-
4.2006, MOD)
GB/T 31465 (all parts) Road vehicles - Fuse-link [ISO 8820 (all parts)]
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T
28046.1 apply.
4 Tests and requirements
All voltages shall be tested on the valid input terminals of the device under test.
The voltage curve is formed under no-load conditions.
Simulate the condition where the generator regulator fails, so that the output
voltage of the generator rises above normal values.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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