Bsi bs en 60512 20 3 2010

Unknown BS EN 60512 20 3 2010 Connectors for electronic equipment — Tests and measurements Part 20 3 Fire hazard tests — Test 20c Flammability, glow wire BSI Standards Publication NO COPYING WITHOUT B[.]

BS EN 60512-20-3:2010

Connectors for electronic equipment — Tests and measurements

Part 20-3: Fire hazard tests — Test 20c:

Flammability, glow-wire

BSI Standards Publication

NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW

BRITISH STANDARD

National foreword

This British Standard is the UK implementation of EN 60512-20-3:2010 It is identical to IEC 60512-20-3:2010 It supersedes Test 20c from BS 5772-9:1993, IEC 60512-9:1992, which will remain current until all the tests it contains have been revised

The UK participation in its preparation was entrusted to Technical Committee EPL/48, Electromechanical components and mechanical structures for electronic equipment

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

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

© BSI 2010 ISBN 978 0 580 62171 0 ICS 31.220.01

Compliance with a British Standard cannot confer immunity from legal obligations

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2010

Amendments issued since publication

Date Text affected

BS EN 60512-20-3:2010

NORME EUROPÉENNE

ICS 31.220.01

English version

(IEC 60512-20-3:2010)

Connecteurs pour équipements Steckverbinder für elektronische

-Partie 20-3: Essais relatifs aux risques Teil 20-3: Prüfungen auf Feuersicherheit -

Essais 20c: Inflammabilité, fil (IEC 60512-20-3:2010)

incandescent

(CEI 60512-20-3:2010)

This European Standard was approved by CENELEC on 2010-07-01 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, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2010 CENELEC -

BS EN 60512-20-3:2010

EN 60512-20-3:2010 2

-Foreword

The text of document 48B/2161/FDIS, future edition 1 of IEC 60512-20-3, 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 60512-20-3 on 2010-07-01

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN and CENELEC shall not be held responsible for identifying any or all such patent rights

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) 2011-04-01 – latest date by which the national standards conflicting

with the EN have to be withdrawn (dow) 2013-07-01 Annex ZA has been added by CENELEC

Endorsement notice

The text of the International Standard IEC 60512-20-3:2010 was approved by CENELEC as a European Standard without any modification

BS EN 60512-20-3:2010

- 3 - EN 60512-20-3:2010

Annex ZA

(normative)

Normative references to international publications with their corresponding European publications

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

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 60695-2-10 - Fire hazard testing

-Part 2-10: Glowing/hot-wire based test methods - Glow-wire apparatus and common test procedure

EN 60695-2-10

-IEC 60695-2-11 - Fire hazard testing

-Part 2-11: Glowing/hot-wire based test methods - Glow-wire flammability test method for end-products

EN 60695-2-11

-

– 2 – 60512-20-3 © IEC:2010

INTERNATIONAL ELECTROTECHNICAL COMMISSION

FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees) The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”) Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work International, governmental and non­ governmental organizations liaising with the IEC also participate in this preparation IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter

5) IEC itself does not provide any attestation of conformity Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity IEC is not responsible for any services carried out by independent certification bodies

6) All users should ensure that they have the latest edition of this publication

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications

8) Attention is drawn to the Normative references cited in this publication Use of the referenced publications is indispensable for the correct application of this publication

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights IEC shall not be held responsible for identifying any or all such patent rights

International Standard IEC 60512-20-3 has been prepared by subcommittee 48B: Connectors,

of IEC technical committee 48: Electromechanical components and mechanical structures for electronic equipment

This standard cancels and replaces Test 20c of IEC 60512-9, issued in 1992 The structure of IEC 60512 series is explained in IEC 60512-1-100

The text of this standard is based on the following documents:

FDIS Report on voting 48B/2161/FDIS 48B/2196/RVD

Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table

60512-20-3 © IEC:2010 – 3 –

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2

A list of all parts of the IEC 60512 series, under the general title Connectors for electronic

equipment – Tests and measurements, can be found on the IEC website

The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication At this date, the publication will be

• reconfirmed,

• withdrawn,

• replaced by a revised edition, or

• amended

– 4 – 60512-20-3 © IEC:2010

1 Scope and object

This part of IEC 60512, when required by the detail specification, is used for testing connectors within the scope of technical committee 48 It may also be used for similar devices when specified in a detail specification

The object of this standard is to detail a standard test method to determine the flammability of

a connector when exposed to a glow-wire test under specified conditions

The glow-wire test simulates thermal stresses which may be produced by such sources of heat or ignition as, for example, glowing elements or overloaded components, for short periods, in order to assess by a simulation technique the fire hazard or burning of a single electronic component

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 60695-2-10, Fire hazard testing – Part 2-10: Glowing/hot-wire based test methods –

Glow-wire apparatus and common test procedure

IEC 60695-2-11, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –

Glow-wire flammability test method for end-products

3 Preparation of the specimen

The specimen shall consist of an unwired connector, mounted and provided with contacts as specified in the detail specification

4 Test method

The test shall be carried out in accordance with IEC 60695-2-10 and IEC 60695-2-11

A wooden board covered with a single layer of tissue paper shall be placed underneath the specimen to be tested as described in IEC 60695-2-10

The position of the specimen and the place of application of glow-wire shall be as specified in the detail specification

The glow-wire consists of a specified loop of nickel/chromium (80/20) wire 4 mm diameter

A sheathed fine-wire thermocouple, having an overall diameter of 0,5 mm and wires of NiCr and NiAl with the welded point located inside the sheath, is used for measuring the temperature of the glow-wire The glow-wire with the thermocouple is shown in Figure 1

60512-20-3 © IEC:2010 – 5 –

The test apparatus shall be so designed that the glow-wire is kept in a horizontal plane and a force of 0,8 N to 1,2 N is applied to the specimen, the force being maintained at this value when the glow-wire or the specimen is moved horizontally one towards the other over a distance of at least 7 mm

The temperature of the tip of the glow-wire and the duration of its application shall be specified in the detail specification

Table 1 – Preferred test temperatures

Preferred test temperatures

°C

Tolerances

°C

550

650

750

850

960

±10

±10

±10

±15

±15

Preferred duration of application: 30 s ± 1 s

Dimensions in millimetres

3

0,6 ± 0,2 2

0 –1

12 ± 1

50 ± 2

70 min

Detail Z

Z

R26 ± 2

IEC 1225/10

Key

1 Glow-wire

2 Thermocouple

3 Stud

Glow-wire material: Nickel/Chromium (80/20)

Diameter: 4,0 mm ± 0,04 mm (before bending)

Diameter A: (After bending)

When forming the glow-wire loop, care shall be taken to avoid fine cracking at the tip

NOTE Annealing is a suitable process for prevention of fine cracking at the tip

Figure 1 – Glow-wire and position of the thermocouple

_

– 6 – 60512-20-3 © IEC:2010

5 Requirements

After removal of the glow-wire, the specimen shall preferably not continue to burn If it continues to burn, the burning time shall not exceed the maximum limit specified in the detail specification

In no case shall any material drops ignite the underlying tissue paper

6 Details to be specified

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