Bsi bs en 02591 317 1998

01468315 PDF BRITISH STANDARD AEROSPACE SERIES BS EN 2591 317 1998 Elements of electrical and optical connection — Test methods — Part 317 Flammability The European Standard EN 2591 317 1998 has the s[.]

BRITISH STANDARD AEROSPACE SERIES BS EN

2591-317:1998

Elements of electrical

and optical

connection —

Test methods —

Part 317: Flammability

The European Standard EN 2591-317:1998 has the status of a

British Standard

ICS 49.060

BS EN 2591-317:1998

This British Standard, having

been prepared under the

direction of the Engineering

Sector Board, was published

under the authority of the

Standards Board and comes

into effect on

15 August 1998

© BSI 05-1999

ISBN 0 580 30305 5

National foreword

This British Standard is the English language version of EN 2591-317:1998 The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic, electrical and fibre optic technology, to

Subcommittee ACE/6/3, Aerospace-Connectors, which has the responsibility to:

— 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

A list of organizations represented on this committee 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 Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic

Catalogue

A British Standard does not purport to include all the necessary provisions of

a contract Users of British Standards are responsible for their correct application

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

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 4 and a back cover

This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover

Amendments issued since publication

Amd No Date Comments

BS EN 2591-317:1998

Contents

Page

ii blank

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 2591-317 June 1998

ICS 49.060

Descriptors: Aircraft industry, aircraft equipment, connecting equipment, test

English version

Aerospace series — Elements of electrical and optical connection — Test methods — Part 317: Flammability

Série aérospatiale — Organes de connexion

électrique et optique — Méthodes d’essais —

Partie 317: Ininflammabilité

Luft- und Raumfahrt — Elektrische und optische Verbindungselemente —

Prüfverfahren — Teil 317: Nichtentflammbarkeit

This European Standard was approved by CEN on 22 June 1997

CEN 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 CEN 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 CEN member into its own language and notified to the

Central Secretariat has the same status as the official versions

CEN members are the national standards bodies of Austria, Belgium,

Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland,

Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,

Switzerland and United Kingdom

CEN

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

Central Secretariat: rue de Stassart 36, B-1050 Brussels

© 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members

Ref No EN 2591-317:1998 E

EN 2591-317:1998

© BSI 05-1999

2

Foreword

This European Standard has been prepared by the

European Association of Aerospace Manufacturers

(AECMA)

After inquiries and votes carried out in accordance

with the rules of this Association, this Standard has

received the approval of the National Associations

and the Official Services of the member countries of

AECMA, prior to its presentation to CEN

This European Standard shall be given the status of

a national standard, either by publication of an

identical text or by endorsement, at the latest by

December 1998, and conflicting national standards

shall be withdrawn at the latest by December 1998

According to the CEN/CENELEC Internal

Regulations, the national standards organizations

of the following countries are bound to implement

this European Standard: Austria, Belgium,

Czech Republic, Denmark, Finland, France,

Germany, Greece, Iceland, Ireland, Italy,

Luxembourg, Netherlands, Norway, Portugal,

Spain, Sweden, Switzerland and the United

Kingdom

Contents

Page

EN 2591-317:1998

1 Scope

This standard specifies a method of verifying the

flammability of elements of connection

It shall be used together with EN 2591

2 Normative references

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

ISO 4046-1978, Paper, board, pulp and related

terms — Vocabulary

EN 2591, Aerospace series — Elements of electrical

and optical connection — Test methods — General

EN 2591-101, Aerospace series — Elements of

electrical and optical connection — Test methods —

Part 101: Visual examination

EN 2591-207, Aerospace series — Elements of

electrical and optical connection — Test methods —

Part 207: Voltage proof test

EN 2591-312, Aerospace series — Elements of

electrical and optical connection — Test methods —

Part 312: Air leakage1)

EN 2591-409, Aerospace series — Elements of

electrical and optical connection — Test methods —

Part 409: Contact retention in insert1)

3 Preparation of specimens

3.1 Specimens shall be prepared according to the

technical specification

Unwired cavities shall be fitted with filler plugs

3.2 Unless specified in the technical specification, the following details shall be stated:

— specimens mated or unmated and fitted with protective covers;

— mounting method, type of cable (non propagating flames) and definition of specimen wiring;

— method A or B;

— final measurements and requirements (if applicable);

— force to be applied according to EN 2591-409;

— leakage rate according to EN 2591-312;

— method according to EN 2591-207 and voltage value

4 Apparatus

The dimensions of the chamber shall be approximately as follows: length 300 mm, width 300 mm, height 600 mm (see Figure 1) It shall be open on the top and front faces The air circulation shall be sufficient but there shall be no draught

The specimens shall be held in position with a suitable device so that the thermal inertia is negligible

The specimens shall be installed in the test chamber with their longitudinal axis positioned at an angle

of (30 ± 5)° to the horizontal For specimens with protective covers, cables shall be directed

downwards

A piece of easily flammable paper (tissue paper to ISO 4046) approximately 250 mm × 250 mm shall

be stretched over a frame, about 300 mm to 350 mm below the specimens

The burner with a nozzle diameter of approximately 10 mm shall be positioned under the specimen so that its axis is at an angle of 30° to the vertical The flame shall be 50 mm to 70 mm high and its hottest point on the edge of the specimens shall have a temperature of (955 ± 30) °C

1) Published as AECMA Prestandard at the date of publication of this standard

EN 2591-317:1998

5 Method

5.1 Test procedure

The flame shall be applied for (30 ± 1) s to the lower

edge of the specimens It shall also cover any

possible non-metallic materials of accessories

Method A — safety: 5.2.1 applies

Method B — safety and functioning: 5.2.1 and 5.2.2

apply

5.2 Requirements

5.2.1 Throughout the test there shall be no dripping

which shall cause paper to ignite

Burning and afterglow shall extinguish within 30 s

from removal of the flame

5.2.2 Final measurements and requirements (if applicable)

The specimens shall be subjected to the following test sequence:

— EN 2591-207: at ambient temperature with 250 V r.m.s., 40 Hz to 60 Hz;

— EN 2591-101: damage to the insert exposing the contact by 3 mm or more is not acceptable;

— EN 2591-409: with 50 % of the nominal load applied for 5 s;

— EN 2591-312: only for hermetic elements of connection

Figure 1

blank

BS EN

2591-317:1998

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