Bsi bs en 60512 10 4 2003

Li ce ns ed C op y W an g B in , I S O /E xc ha ng e C hi na S ta nd ar ds In fo rm at io n C en tr e, 0 4 F eb ru ar y 20 04 , U nc on tr ol le d C op y, ( c) B S I BRITISH STANDARD BS EN 60512 10 4[.]

British Standard

A single copy of this British Standard is licensed to

Wang Bin

04 February 2004

This is an uncontrolled copy Ensure use of the most current version of this document by searching British Standards Online at bsonline.techindex.co.uk

BRITISH STANDARD BS EN

60512-10-4:2003

Connectors for

electronic equipment —

Tests and

measurements —

Part 10-4: Impact tests

(free components), static load tests

(fixed components), endurance tests

and overload tests — Test 10d:

Electrical overload (connectors)

The European Standard EN 60512-10-4:2003 has the status of a

British Standard

ICS 31.220.10

12&23<,1*:,7+287%6,3(50,66,21(;&(37$63(50,77('%<&23<5,*+7/$:

BS EN 60512-10-4:2003

This British Standard was

published under the authority

of the Standards Policy and

Strategy Committee on

13 November 2003

© BSI 13 November 2003

ISBN 0 580 42903 2

National foreword

This British Standard is the official English language version of

EN 60512-10-4:2003 It is identical with IEC 60512-10-4:2003 It supersedes

BS EN 60512-10-4:1997 which is withdrawn

The UK participation in its preparation was entrusted by Technical Committee EPL/48, Electromechanical components and mechanical structures for electronic equipment, to Subcommittee EPL/48/2, Connectors for electronic equipment, which has the responsibility to:

A list of organizations represented on this subcommittee can be obtained on request to its secretary

Cross-references

The British Standards which implement international or European

publications referred to in this document may be found in the BSI Catalogue

under the section entitled “International Standards Correspondence Index”, or

by using the “Search” facility of the BSI Electronic Catalogue or of

British Standards Online

This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

— aid enquirers to understand the text;

— present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the

UK interests informed;

— monitor related international and European developments and promulgate them in the UK

Summary of pages

This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover

The BSI copyright notice displayed in this document indicates when the document was last issued

Amendments issued since publication

Amd No Date Comments

EUROPEAN STANDARD EN 60512-10-4

NORME EUROPÉENNE

EUROPÄISCHE NORM October 2003

CENELEC

European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members

Ref No EN 60512-10-4:2003 E

English version

Connectors for electronic equipment –

Tests and measurements Part 10-4: Impact tests (free components), static load tests (fixed components), endurance tests and overload tests –

Test 10d: Electrical overload (connectors)

(IEC 60512-10-4:2003)

Connecteurs pour équipements

électroniques –

Essais et mesures

Partie 10-4: Essais d'impact (composants

libres), essais d'impact sous charge

statique (composants fixes), essais

d'endurance et essais de surcharge -

Essai 10d: Surcharge électrique

(connecteurs)

(CEI 60512-10-4:2003)

Einrichtungen – Mess- und Prüfverfahren Teil 10-4: Aufprallprüfungen (freie Bauelemente), Prüfungen mit statischer Last (feste Bauelemente), Dauerprüfung und Überlastprüfungen –

Prüfung 10d: Elektrische Überlast (Steckverbinder)

(IEC 60512-10-4:2003)

This European Standard was approved by CENELEC on 2003-10-01 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member

This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom

Foreword

The text of document 48B/1350/FDIS, future edition 2 of IEC 60512-10-4, prepared by SC 48B, Connectors, of IEC TC 48, Electromechanical components and mechanical structures for electronic equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as

EN 60512-10-4 on 2003-10-01

This European Standard supersedes EN 60512-10-4:1996

This standard is to be read in conjunction with EN 60512-1:2001 and EN 60512-1-100:2001 which explains the structure of the EN 60512 series

The following dates were fixed:

– latest date by which the EN has to be implemented

at national level by publication of an identical

national standard or by endorsement (dop) 2004-07-01

– latest date by which the national standards conflicting

with the EN have to be withdrawn (dow) 2006-10-01

Annexes designated "normative" are part of the body of the standard

In this standard, annex ZA is normative

Annex ZA has been added by CENELEC

Endorsement notice

The text of the International Standard IEC 60512-10-4:2003 was approved by CENELEC as a European Standard without any modification

Page 2

EN 60512−10−4:2003

CONNECTORS FOR ELECTRONIC EQUIPMENT –

TESTS AND MEASUREMENTS – Part 10-4: Impact tests (free components), static load tests (fixed components), endurance tests and overload tests –

Test 10d: Electrical overload (connectors)

1 Scope and object

This part of IEC 60512 applies to the electrical overload test of mated contact pairs of

connectors

The object of this test is to draw up a standard method to assess the performance of mated

contact pairs of connectors with an electrical overload current flowing through them for a

limited period of time between 100 ms and 20 s

The test procedure is based on measuring the increase of temperature during the specified

period of time when the electrical overload is applied to the contacts

Temperature increase over time is measured for an electrical overload current, specified as

an integer multiple of the rated current, and an overload current-over-time diagram is plotted

NOTE Practice shows that, for limited periods of time, contacts can conduct a multiple of the maximum

permissible current without damage to the contact area

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

IEC 60512 (all parts), Connectors for electronic equipment – Tests and measurements

IEC 60512-1-100, Connectors for electronic equipment – Tests and measurements − Part 1-100:

General – Applicable publications

3 Preparation of specimens

The connector shall be wired with the maximum wire size for the contacts and, unless

otherwise specified in the detail specification, the shortest possible wire lengths compatible

with the contact arrangement

Contacts of the same size in a connector set shall be wired in series

At least three mated connectors shall be tested

Page 3

EN 60512−10−4:2003

4 Test method

Overload current shall be an integer multiple of the rated current specified in the detail specification This overload current shall be applied for a period of time and shall be switched off as soon as the temperature has reached the upper temperature limit defined in the detail specification

Recovery of the samples under test to laboratory temperature conditions shall be achieved before the next cycle is carried out

The test shall be repeated with different overload currents to plot temperature-time curves as shown in Figure A.1 At least five different overload current-time values in the considered time range from 100 ms to 20 s shall be selected to plot the curve in Figure A.2

At least three samples shall be tested and the sample with the fastest temperature-increasing rate shall be selected for the overload current plot

5 Measurements and requirements

The specimen shall be checked by the following tests, unless otherwise specified in the detail specification

– Test 2a (contact resistance – millivolt level method) of IEC 60512;

– Tests 13a (engaging and separating forces) or 13b (insertion and withdrawal forces) of IEC 60512;

– Test 1a (visual examination) of IEC 60512

Attention should be given to any indication of deterioration of the contact surface and housing

or as specified in the detail specification

6 Details to be specified

When this test is required by the detail specification, the following details shall be specified: a) number of specimens and contacts to be tested;

b) type and size of wire used;

c) test points and method (thermocouple) for temperature measurement;

d) upper temperature limit;

e) rated current and overload current of specimens;

f) measurements and requirements;

g) any deviation from the standard test method

Page 4

EN 60512−10−4:2003

Annex A

(informative)

Basic consideration for measurement and overload current plot

The overload current-carrying capacity is influenced by a variety of attributes (design and

application) and limited by the maximum allowed temperature of contacts, plating,

terminations, housing, etc

The maximum temperature increase tb under current overload can be calculated by

tb = tu –te

where

tu is the upper temperature limit of the connector according to the detail specification;

te is the maximum permissible environmental temperature of the connector’s surrounding

environment in the application

The following diagrams are measured and plotted as examples

120

0

Time s

110 100 90 80 70 60 50 40 30 20 10 0

6 ⋅ IB

5 ⋅ IB= 125 A

4 ⋅ IB= 100 A

3 ⋅ IB= 75 A

2 ⋅ IB= 50 A

tb= 85 °C

a

IEC 2055/03

a Overload current, an integer multiple of rated current IB

Figure A.1 – Temperature increase against time and current

With the temperature-time curves and the maximum temperature increase tb (in Figure A.1

above tb = 85 °C), the time and current values are used to plot Figure A.2 in a double

logarithmic scale

Page 5

EN 60512−10−4:2003

1 000

100

10

Duration of overload s

tb = 85 °C

IEC 2056/03

Figure A.2 − Maximum overload against time

Current-time values below the curve shown in Figure A.2 are permitted

_

Page 6

EN 60512−10−4:2003

Annex ZA

(normative)

Normative references to international publications with their corresponding European publications

This European Standard incorporates by dated or undated reference, provisions from other

publications These normative references are cited at the appropriate places in the text and the

publications are listed hereafter For dated references, subsequent amendments to or revisions of any

of these publications apply to this European Standard only when incorporated in it by amendment or

revision For undated references the latest edition of the publication referred to applies (including

amendments)

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies

Publication Year Title EN/HD Year

IEC 60512 Series Connectors for electronic equipment -

Tests and measurements

EN 60512 Series

IEC 60512-1-100 2001 Connectors for electronic equipment -

Tests and measurements Part 1-100: General - Applicable publications

EN 60512-1-100 2001

Page 7

EN 60512−10−4:2003

BS EN

60512-10-4:2003

BSI

389 Chiswick High Road

London

W4 4AL

BSI — British Standards Institution

BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter

Revisions

British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions

It is the constant aim of BSI to improve the quality of our products and services

We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover

Tel: +44 (0)20 8996 9000 Fax: +44 (0)20 8996 7400

BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards

Buying standards

Orders for all BSI, international and foreign standards publications should be addressed to Customer Services Tel: +44 (0)20 8996 9001

Fax: +44 (0)20 8996 7001 Email: orders@bsi-global.com Standards are also available from the BSI website at http://www.bsi-global.com

In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested

Information on standards

BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service Various BSI electronic information services are also available which give details on all its products and services Contact the Information Centre

Tel: +44 (0)20 8996 7111 Fax: +44 (0)20 8996 7048 Email: info@bsi-global.com Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details

of these and other benefits contact Membership Administration

Tel: +44 (0)20 8996 7002 Fax: +44 (0)20 8996 7001

Email: membership@bsi-global.com

Information regarding online access to British Standards via British Standards Online can be found at http://www.bsi-global.com/bsonline

Further information about BSI is available on the BSI website at http://www.bsi-global.com

Copyright

Copyright subsists in all BSI publications BSI also holds the copyright, in the

UK, of the publications of the international standardization bodies Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI

This does not preclude the free use, in the course of implementing the standard,

of necessary details such as symbols, and size, type or grade designations If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained

Details and advice can be obtained from the Copyright & Licensing Manager Tel: +44 (0)20 8996 7070 Fax: +44 (0)20 8996 7553

Email: copyright@bsi-global.com