ISO 21780:2020
(Main)Road vehicles — Supply voltage of 48 V — Electrical requirements and tests
Road vehicles — Supply voltage of 48 V — Electrical requirements and tests
This document covers requirements and tests for the electric and electronic components in road vehicles equipped with an electrical system operating at a nominal voltage of 48 V DC. This includes the following: — general requirements on 48 V DC electrical systems; — voltage ranges; — slow voltage transients and fluctuations (not including EMC).
Véhicules routiers — Tension d'alimentation de 48 V — Exigences électriques et essais
Cestna vozila - Napajalna napetost 48 V - Električne zahteve in preskusi
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 21780
First edition
2020-08
Road vehicles — Supply voltage of
48 V — Electrical requirements and
tests
Véhicules routiers — Tension d'alimentation de 48 V — Exigences
électriques et essais
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Functional status . 2
4.1 General . 2
4.2 Functional status 1 (FS1) . 3
4.3 Functional status 2 (FS2) . 3
4.4 Functional status 3 (FS3) . 3
4.5 Functional status 4 (FS4) . 3
4.6 Functional status 5 (FS5) . 3
5 Supply voltage range . 3
6 Functional categories . 5
7 Operating modes . 6
8 General tests conditions . 6
8.1 Standard tolerances . 6
8.2 General values. 7
8.3 Sampling rate and value resolution . 7
8.4 Description of interfaces . 7
8.5 Restrictions on performing the tests . 7
8.6 Number of tested samples . 7
8.7 Test voltages . 7
8.8 Test procedure . 8
8.9 Parameter check . 8
8.10 Continuous parameter monitoring with drift analysis . 9
8.11 Physical analysis . 9
9 General requirements .10
9.1 General .10
9.2 Prerequisites regarding the system in which the component is applied .10
9.3 Component requirements .10
10 Tests and requirements .11
10.1 Test-01: nominal voltage range .11
10.1.1 Purpose .11
10.1.2 Test .11
10.1.3 Procedure .11
10.1.4 Requirement .12
10.2 Test-02: lower and upper transitory voltage ranges .12
10.2.1 Purpose .12
10.2.2 Test .12
10.2.3 Procedure .13
10.2.4 Requirement .14
10.3 Test-03: short term overvoltage.14
10.3.1 Purpose .14
10.3.2 Test .14
10.3.3 Procedure .15
10.3.4 Requirement .15
10.4 Test-04: supply component load dump control test .15
10.4.1 Purpose .15
10.4.2 Test .15
10.4.3 Procedure .16
10.4.4 Requirement .16
10.5 Test-05: starting profile .17
10.5.1 Purpose .17
10.5.2 Test .17
10.5.3 Procedure .18
10.5.4 Requirement .18
10.6 Test-06: long term overvoltage .18
10.6.1 Purpose .18
10.6.2 Test .18
10.6.3 Requirement .19
10.7 Test-07: overvoltage with consumer components which may supply electrical energy .19
10.7.1 Purpose .19
10.7.2 Test .19
10.7.3 Requirements for part 1 and part 2 .22
10.8 Test-08: decrease and increase of supply voltage .23
10.8.1 Purpose .23
10.8.2 Test .23
10.8.3 Requirement .23
10.9 Test-09: voltage ripples .23
10.9.1 Purpose .23
10.9.2 Test .24
10.9.3 Requirement .
...
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