1、BRITISH STANDARDBS EN 2349-312:2006Aerospace series Requirements and test procedures for relays and contactors Part 312: Electrical service life Mixed loadThe European Standard EN 2349-312:2006 has the status of a British StandardICS 49.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54
2、g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 2349-312:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2007 BSI 2007ISBN 978 0
3、580 50027 5National forewordThis British Standard was published by BSI. It is the UK implementation of EN 2349-312:2006. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology, to Panel ACE/6/-/4, Aerospace Switchin
4、g devices.A list of organizations represented on ACE/6/-/4 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.Compliance with a British Standard cannot confer immunity
5、from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 2349-312October 2006ICS 49.060English VersionAerospace series - Requirements and test procedures for relaysand contactors - Part 312: Electrical service life - Mixed load
6、Srie arospatiale - Exigences et mthodes dessais desrelais et contacteurs - Partie 312 : Pouvoirs decommutation - Charges combinesLuft- und Raumfahrt - Anforderungen und Prfverfahren frRelais und Schaltschtze - Teil 312: ElektrischeLebensdauer - MischlastThis European Standard was approved by CEN on
7、19 May 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obt
8、ained 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secre
9、tariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portug
10、al, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means rese
11、rvedworldwide for CEN national Members.Ref. No. EN 2349-312:2006: E2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Mounting method.4 4 Test procedures.4 5 Test criteria.6 6 Verification tests6 EN 2349-312:20063 Foreword This document (EN 2349-312:2006) has been prepared by the AeroSpa
12、ce and Defence Industries Association of europe - Standardization (ASD-STAN). After enquiries 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 ASD, prior t
13、o 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 April 2007, and conflicting national standards shall be withdrawn at the latest by April 2007. According to the CEN/CENEL
14、EC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta
15、, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 2349-312:20064 1 Scope This standard specifies a method for testing the electrical service life - mixed load of relays and contactors. It shall be used together with EN 2349-10
16、0. 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. EN 2349-100, Aerospace
17、series Requirements and test procedures for relays and contactors Part 100: General requirements 1)EN 2349-302, Aerospace series Requirements and test procedures for relays and contactors Part 302: Insulation resistance EN 2349-303, Aerospace series Requirements and test procedures for relays and co
18、ntactors Part 303: Dielectric strength EN 2349-307, Aerospace series Requirements and test procedures for relays and contactors Part 307: Contact voltage drop EN 2349-412, Aerospace series Requirements and test procedures for relays and contactors Part 412: Seal 3 Mounting method The relay or contac
19、tor shall be wired in accordance with EN 2349-100 and the rated contact load. The relay or contactor shall be mounted and placed in an air circulating heating cabinet. 4 Test procedures 4.1 Each normally closed and normally open contact shall connect, conduct and disconnect the specified loads. The
20、loads shall be connected to (28 1) V d.c. 4.2 Unless otherwise specified, the operating and resting contacts shall be loaded as follows: a) for relays or contactors with a nominal contact rating of less than 20 A: 1) 0,5 A resistive load; 2) 0,3 A inductive load; 3) 0,1 A resistive load; 4) rated re
21、sistive load. 1) In preparation at the date of publication of this standard. EN 2349-312:20065 b) for relays or contactors with a nominal contact rating of more than 20 A: 1) 10 % of the rated resistive load; 2) 10 % of the rated resistive load; 3) 10 % of the rated resistive load; 4) rated resistiv
22、e load. 4.3 For relays or contactors with more than two poles, the above loads shall be applied in the same sequence to the other poles. 4.4 Each contact shall switch one load only in each case. 4.5 The resting and operating contacts shall be tested simultaneously. 4.6 The coil of the relay or conta
23、ctor shall be energized at the rated voltage. 4.7 The contacts shall be monitored for operation. 4.8 Each defective switching operation shall constitute a failure. 4.9 The contact voltage drop shall be measured for each switching operation. The values shown in Table 1 shall not be exceeded. Table 1
24、Contact voltage drop before and during mixed load testing Contact voltage drop during the test mV Rated resistive contact current A Contact voltage drop before test mV 0,5 A 0,3 A 0,1 A Resistive load 5 10 15 20 150 150 150 150 40 32 30 30 24 20 18 18 8 7 6 6 175 175 175 175 4.10 For relays or conta
25、ctors with rated contact current 20 A, the maximum permissible contact voltage drop carrying 10 % of the rated load shall be calculated as follows: 000105,015,021d+=IIU Where Udis the voltage drop, in millivolts; I1is the load current, in amperes; I2is the rated current, in amperes. EN 2349-312:2006
26、6 4.11 The test shall be performed at the maximum permissible temperature, as defined in the product standard. During the test the housing of the relay or contactor shall be connected to the earth of the electrical installation by a fuse with a rating of 5 % of the rated resistive contact current, b
27、ut not greater than 3 A. Blowing of the fuse shall constitute a failure. 4.12 Number of switching cycles: see product standard. One switching cycle comprises: coil energized time: (29 3) s; coil de-energized time: (1,5 0,5) s. 5 Test criteria No electrical or mechanical failure; no sticking or seizi
28、ng of contacts; no blown fuse; the voltage drop on the contacts shall not exceed the values shown in Table 1. 6 Verification tests Test in accordance with EN 2349-302, EN 2349-303, EN 2349-307 and EN 2349-412. EN 2349-312:2006blankBS EN 2349-312:2006BSI389 Chiswick High RoadLondonW4 4ALBSI British S
29、tandards InstitutionBSI 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.RevisionsBritish Standards are updated by amendment or revision. Users of British S
30、tandards 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 techn
31、ical 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 stan
32、dardsOrders 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: ordersbsi-. Standards are also available from the BSI website at http:/www.bsi-.In response to orders for international stand
33、ards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested.Information on standardsBSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to
34、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: infobsi-.Subscribing members of BSI are kept up to date with standards dev
35、elopments 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: membershipbsi-.Information regarding online access to British Standards via British St
36、andards Online can be found at http:/www.bsi- information about BSI is available on the BSI website at http:/www.bsi-.CopyrightCopyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted und
37、er 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 implem
38、enting 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: copyrightbsi-.
