Bsi bs en 02591 315 2015

BSI Standards PublicationBS EN 2591-315:2015 Aerospace series — Elements of electrical and optical connection — Test methods Part 315: Fluid resistance... BS EN 2591-315:2015EUROPEAN STA

BSI Standards Publication

BS EN 2591-315:2015

Aerospace series — Elements

of electrical and optical connection — Test methods

Part 315: Fluid resistance

This British Standard is the UK implementation of EN 2591-315:2015.

It supersedes BS EN 2591-316:1998 which is withdrawn

The UK participation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology

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

© The British Standards Institution 2015

Published by BSI Standards Limited 2015 ISBN 978 0 580 89591 3

ICS 49.060; 49.090

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 30 November 2015

Amendments/corrigenda issued since publication

BS EN 2591-315:2015

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

November 2015

English Version

Aerospace series - Elements of electrical and optical connection - Test methods - Part 315: Fluid resistance

Série aérospatiale - Organes de connexion électrique et

optique - Méthodes d'essais - Partie 315 : Résistance

aux fluides

Luft- und Raumfahrt - Elektrische und optische Verbindungselemente - Prüfverfahren - Teil 315: Beständigkeit gegen Flüssigkeiten This European Standard was approved by CEN on 8 June 2015

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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E UR O P É E N DE N O R M A L I SA T I O N

E UR O P Ä I SC H E S KO M I T E E F ÜR N O R M UN G

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2015 CEN All rights of exploitation in any form and by any means reserved

Contents

Page

European foreword 3

1 Scope 4

2 Normative references 4

3 Test fluids 4

4 Preparation of specimens 5

5 Method 5

6 Final measurements and requirements (if applicable) 8

BS EN 2591-315:2015

EN 2591-315:2015 (E)

3

European foreword

This document (EN 2591-315:2015) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN)

After enquiries and votes carried out in accordance with the rules of this Association, this European Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, 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 May 2016, and conflicting national standards shall be withdrawn at the latest by May 2016

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

This document supersedes EN 2591-315:1998

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom

1 Scope

This European Standard specifies the method of determining the fluid resistance of a connector, or cable accessory

It shall be used together with EN 2591-100 and EN 3909

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies

EN 2591-100, Aerospace series — Elements of electrical and optical connection — Test methods —

Part 100: General

EN 2591-101, Aerospace series — Elements of electrical and optical connection — Test methods —

Part 101: Visual examination

EN 2591-206, Aerospace series — Elements of electrical and optical connection — Test methods —

Part 206: Measurement of insulation resistance

EN 2591-408, Aerospace series — Elements of electrical and optical connection — Test methods —

Part 408: Mating and unmating forces

EN 2591-409, Aerospace series — Elements of electrical and optical connection — Test methods —

Part 409: Contact retention in insert

EN 3909, Aerospace series — Test fluids for electrical and optical components and sub-assemblies

3 Test fluids

Unless otherwise specified in the Product Standard, the samples under test shall be exposed to each of the fluid types listed in Table 1 below Each fluid shall be selected from the fluid groups in EN 3909

Table 1 — Types of test fluid to be used Fluid group number Fluid family name Test fluid type (variant) No of fluids to be selected per test Remarks (e.g test temperature)

Group 1 Fuels Hydrocarbon 1 -

Biofuel 1 - Group 2 Hydraulic Fluids Mineral 1 -

Synthetic 1 - Group 3 Oils Mineral 1 -

Synthetic 1 - Group 4 Cleaning Fluids Optional 1 -

Group 5 De-Icing Fluids Runway 1 -

Aircraft 1 - Group 6 Fire Extinguishant - 1 - a

Group 7 Cooling Fluid - 1 -

a Due to restrictions and applicable by local laws, fire extinguishant shall not be discharged in non-critical situations

BS EN 2591-315:2015

EN 2591-315:2015 (E)

5

4 Preparation of specimens

4.1 Unless otherwise specified in the relevant Technical Specification or Product Standard, specimens

shall be prepared as follows to comply with Figure 1 and Figure 2

Each specimen shall be visibly inspected for any imperfections, clean, dry and free from any

contaminants that do not comprise the ‘ready for use’ product

Unwired cavities shall be fitted with contacts and sealing plugs 20 % of cavities shall be fitted with sealing plugs and for connectors with less than 5 cavities, 1 cavity shall be fitted with a sealing plug All remaining cavities shall be fitted with wired contacts

Wired contacts shall be fitted with sufficient cable to enable the test sample to be fully immersed in the test fluid chamber Care shall be taken to ensure the sample is not subjected to unnecessary load or deformation (e.g due to tough cables or cable alignment at the rear of the connector or accessory) See Figure 1

4.2 The following details shall be stated in the Product Standard or Technical Specification:

 types of fluids (and the substance application method if different to herein);

 number of specimens (if different from one per test fluid);

 mounting method, type of cable and definition of specimen wiring;

 number of cycles;

 temperature (T1) and duration of the first phase;

 initial measurements (if applicable);

 method according to EN 2591-206 and insulation resistance value;

 temperature (T2) and duration for the third phase;

 final measurements and requirements (if applicable)

5 Method

5.1 Initial measurements (if applicable in the Product Standard or Technical

Specification)

Measurements shall be carried out as specified in the Product Standard or Technical Specification

5.2 Procedure

Each specimen shall be subjected to only one of the specified fluids A fluid shall be selected from each

of the test fluid categories in accordance with Table 1 and EN 3909

Key

1 Test fluid

2 Test chamber

3 Sufficient cable (when fitted) to avoid undue strain on the assembly

4 Test sample(s) Mated or unmated in accordance with the Product Standard or Technical Specification requirements

Figure 1 — Typical test set-up

If the test fluid is a gas at the designated test temperature, the fluid shall be omitted from the test (unless otherwise instructed by the test authority) All test instructions shall include all commensurate health and safety instructions

Key

1 First phase

BS EN 2591-315:2015

EN 2591-315:2015 (E)

7

5.2.1 First phase

Fluids: immersion (unless otherwise specified in the Technical Specification or Product Standard) Specimens shall be unmated

The specimens and the fluid shall be brought to the temperature specified (T1)

Fully immerse the specimens for (15 + 5) min at the test temperature

The temperature of the fluid shall not exceed the temperature limit of the specimen The upper rated temperature limit of the specimen shall be considered the maximum test temperature if there is a conflict

NOTE 1 The flash point and the maximum temperature of the test fluid according to EN 3909 must be observed

NOTE 2 If more viscous substances with the consistency of grease, etc., are instructed in the Technical Specification or Product Standard their application shall be:

Grease: application

The specimens shall be mated unless otherwise specified

The grease shall be spread in a fine film with a brush all over the specimens

The specimens and the grease shall be brought to the specified temperature (T1)

The specimens shall then be placed in an oven for (15 + 5) min

5.2.2 Second phase

Fluids

The specimens shall be removed from the fluid and stored at ambient conditions for (7 ± 0,5) h

The specimens shall be allowed to drain, to remove trapped fluid (not wiped dry), in still air during storage

Greases

The specimens shall be unmated and stored at ambient conditions for (7 ± 0,5) h If the grease has become fluid it shall be allowed to drain, to remove trapped fluid (not wiped dry), in still air during storage

5.2.3 Third phase

The specimens shall be mated and placed in a pre-heated oven (the oven air shall be circulated and

renewed), the samples shall be subjected to the specified temperature (T2) for (16 ± 0,5) h, unless otherwise specified

If the third phase temperature is not specified it shall be (65 ± 2) °C

NOTE If the test is carried out at a temperature exceeding the flash point, appropriate safety measures shall

be taken

5.2.4 Number of cycles

The number of cycles shall be in accordance with the Technical Specification or Product Standard If the number of cycles is not specified the cycle shall be repeated four times (five cycles in total)

6 Final measurements and requirements (if applicable)

The final measurements shall be conducted at room temperature and without cleaning the specimens All specimens shall be subjected to the following test sequence after this test:

 EN 2591-101: a discolouration is admissible

 EN 2591-206: applicable to specimens exposed to non-conducting test fluids (except mated connectors during phase 1)

 EN 2591-408: specimens may be lubricated if specified

 EN 2591-409

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