GB/T 21437.2-2021Road vehicles - Test method of electrical disturbances from conduction and coupling - Part 2: Electrical transient conduction along supply lines only (English PDF)

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 2 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 21437.2-2008 "Road vehicles - Electrical disturbances

from conduction and coupling - Part 2.Electrical transient conduction along supply

lines only". Compared with GB/T 21437.2-2008, except for structural adjustment and

editorial changes, the main technical changes are as follows.

- CHANGE the "4.3 Voltage transient emission test" to "4.3.1 General provisions",

"4.3.2 Arrangement for slow pulse test", "4.3.3 Arrangement for fast pulse test".

CHANGE the Figure 1, dividing the "Test arrangement for fast pulse transient

emission" into two cases (see 4.3; 4.3 of the 2008 edition);

- CHANGE the "4.4 Transient immunity test" to "4.4.1 DUT Location", "4.4.2 Power

line location", "4.4.3 Load simulator location", "4.4.4 Test arrangement". DELETE

the Figure 2c) -- Illustration on the 5b pulse (see 4.4; 4.4 of the 2008 edition);

- INTEGRATE and SIMPLIFY the measuring instrument in 5.5.DELETE the "Table

2 -- Voltage probe parameters" (see 5.5; 5.5 of the 2008 edition);

- ADD the title "5.6.1 General provisions" to the content of the suspension paragraph

under 5.6; POSTPONE the subsequent clauses accordingly. CHANGE the Us

parameters of test pulse 1, test pulse 2a and 2b, test pulse 3a and 3b in 5.6 (see 5.6;

1 Scope

This document specifies the test equipment, test methods, requirements for electrical

transient conducted emission and immunity tests of automotive electrical/electronic

components, along 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)

3 Terms and definitions

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

4 Test procedures

The power line's transient emission and immunity tests, which are mentioned in this

document, are carried out in the laboratory.

During the test, the ambient temperature shall be 23 °C +/- 5 °C.

5 Test equipment and requirements

The artificial network replaces the impedance of the vehicle wiring harness. It is used

as a reference standard for impedance, in the laboratory, to determine the performance

of equipment and electrical/electronic devices.

The parallel resistor RS simulates the equivalent resistor of other electrical devices of

the vehicle, which are connected in parallel with the DUT.

Switch S shall be installed in the position. In vehicle's practical applications,

if the line, between the switch and the load, is long, a slow pulse arrangement shall be

used. Otherwise, it should use a fast pulse arrangement.

......