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1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-220:2005 Elements of electrical and optical connection Test methods Part 220: Contact/conductor joint ageing by current and temperature cycling The European Standard EN 2591-220:2005 has the status of a British Standard ICS 49.060 ? Licensed Copy: sheffie
2、ldun sheffieldun, na, Thu Nov 02 18:13:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-220:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 10 February 2006 BSI 10 February 2006 ISBN 0 580 47800 9 National foreword This British S
3、tandard is the official English language version of EN 2591-220:2005. 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: A list
4、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 Standa
5、rds 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
6、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 UK interests informed; monitor related international and European develo
7、pments 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 5 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication
8、Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:13:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-220 October 2005 ICS 49.060 English Version Aerospace series - Elements of electrical and optical connection - Te
9、st methods - Part 220: Contact/conductor joint ageing by current and temperature cycling Srie arospatiale - Organes de connexion lectrique et optique - Mthodes dessais - Partie 220 : Vieillissement des contacts et conducteurs par cyclage en temprature et en courant Luft- und Raumfahrt - Elektrische
10、und optische Verbindungselemente - Prverfahren - Teil 220: Alterung von Kontakten und Leiteren durch zyklische Temperatur- und Strombelastung This European Standard was approved by CEN on 19 September 2005. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the
11、 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
12、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
13、 Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STAN
14、DARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2005 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2591-220:2005: E Licensed Copy: sheffieldun sheffi
15、eldun, na, Thu Nov 02 18:13:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 Contents Page Foreword 3 1 Scope.4 2 Normative references .4 3 Preparation of specimens 4 4 Test method and requirements4 5 Load and temperature cycling test5 6 Measurements and requirements5 7 Details to be specified 5 EN 2
16、591-220:2005 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:13:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 Foreword This European Standard (EN 2591-220:2005) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and vo
17、tes 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
18、, either by publication of an identical text or by endorsement, at the latest by April 2006, and conflicting national standards shall be withdrawn at the latest by April 2006. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN an
19、d/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmar
20、k, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 2591-220:2005 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02
21、18:13:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 1 Scope This standard specifies a method to demonstrate the long term electrical stability of the conductor to contact joint in the EN 3155 series of product standards. The thermal cycling test is carried out using a combination of conductor curr
22、ent and “ambient” heat to achieve the appropriate maximum rated operating temperature. It shall be used together with EN 2591-100. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. F
23、or 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 2591-202, Aerospace series Elements of electrical and optical connection Test method
24、s Part 202: Contact resistance at rated current. EN 2591-417, Aerospace series Elements of electrical and optical connection Test methods Part 417: Tensile strength (crimped connection). EN 3155 (all parts), Aerospace series Electrical contacts used in elements of connection. 3 Preparation of specim
25、ens A test specimen shall consist of a wired male contact mated with the associated female contact of the same contact and barrel or bucket size (see Figure 1). The cable shall be in accordance with EN 3155-001 and the gauge shall be as specified in the contact product standard. The temperature rati
26、ng shall be the same as, or exceeding, the maximum stated in the contact product standard. To assist in the voltage drop measurements during testing, test point connections shall be made to the body of the contact, in the vicinity of the joint, and to the conductor as close as possible to, but not m
27、ore than 1 mm from, the end of the barrel or bucket. For the test, a number of identical specimens may be linked together in series. See Clause 4. Figure 1 Test specimen 4 Test method and requirements A total of 10 specimens shall be prepared for each barrel or bucket size, 50 % using maximum size c
28、able, the balance using a minimum size cable. The sequence of testing shall be as given in Table 1. EN 2591-220:2005 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:13:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 Table 1 Test sequence Test Reference Method Additional information Contact
29、 resistance at rated current EN 2591-202 As per EN 3155-001 Contacts are to be in free air and not fitted in a connector. Load and temperature cycling See Clause 5 Contacts are to be in free air and not fitted in a connector. Contact resistance at rated current EN 2591-202 As per EN 3155-001 See Cla
30、use 6. Contacts are to be in free air and not fitted in a connector. Tensile strength (crimped connection) EN 2591-417 As per EN 3155-001 5 Load and temperature cycling test 5.1 The specimens of the same cable size shall be connected in series and a thermocouple attached to a barrel or bucket to mon
31、itor the temperature of the contacts in the vicinity of the joints. The specimens shall be placed in an enclosure and the relevant conductor current, as defined in the contact product standard, shall be applied. The temperature within the enclosure shall be raised so that the maximum contact tempera
32、ture is achieved by the combined heating effect of current and the prevailing “ambient” enclosure temperature. 5.2 The temperature shall be held to within a tolerance 5 C for a maximum of 1 min. This is defined as the “heat-on“ period. At the end of the “heat-on“ period, the heat and test current sh
33、all be removed and all specimens allowed to cool to (25 5) C. This is the “heat-off“ period. Fan assisted cooling is permissible. A “heat-on“ and “heat-off“ period constitutes one cycle. 5.3 1 000 cycles shall be applied for specimens rated for use below 150 C and 1 500 cycles for specimens rated fo
34、r use at 150 C and above. 6 Measurements and requirements 6.1 The voltage drop across each individual joint shall be measured using the attached test points. An initial measurement shall be made before the commencement of cycling and then after every 100 cycles at a consistent temperature of (25 5)
35、C on completion of a “heat-off“ period. 6.2 During the final 500 cycles of the test, the voltage drop across each joint shall not vary by more than 20 % from the first value obtained during this period. 6.3 The final value of voltage drop across each joint shall not exceed 150 % of the initial volta
36、ge drop. 7 Details to be specified The following details shall be specified: 1. Temperature rating of the cable; 2. Conductor gauge size and stranding; 3. Conductor material and plating; 4. Joining materials or system to be used; 5. Crimp tools and settings, (if applicable). EN 2591-220:2005 License
37、d Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:13:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-220:2005 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
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