1、BRITISH STANDARD AEROSPACE SERIESBS EN 2591-220:2005Elements of electrical and optical connection Test methods Part 220: Contact/conductor joint ageing by current and temperature cyclingThe European Standard EN 2591-220:2005 has the status of a British StandardICS 49.060g49g50g3g38g50g51g60g44g49g42
2、g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 2591-220:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 10 F
3、ebruary 2006 BSI 10 February 2006ISBN 0 580 47800 9National forewordThis British Standard 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 Subco
4、mmittee ACE/6/-/3, Aerospace Connectors, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may
5、 be found in the BSI Catalogue under the section entitled “International Standards 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 ar
6、e responsible for its correct application. Compliance with a British Standard 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
7、 keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis 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 indica
8、tes when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 2591-220October 2005ICS 49.060English VersionAerospace series - Elements of electrical and optical connection- Test methods - Part 220: Contact/conductor j
9、oint ageing bycurrent and temperature cyclingSrie arospatiale - Organes de connexion lectrique etoptique - Mthodes dessais - Partie 220 : Vieillissementdes contacts et conducteurs par cyclage en temprature eten courantLuft- und Raumfahrt - Elektrische und optischeVerbindungselemente - Prverfahren -
10、Teil 220: Alterungvon Kontakten und Leiteren durch zyklische Temperatur-und StrombelastungThis 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 conditions for giving this EuropeanStandard the stat
11、us of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 ver
12、sion in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia
13、, 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 STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE F
14、R NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2591-220:2005: E2 Contents Page Foreword 3 1 Scope .4 2 Normative references .4 3 Preparation of specimens 4 4 Test
15、method and requirements4 5 Load and temperature cycling test5 6 Measurements and requirements 5 7 Details to be specified 5 EN 2591-220:20053 Foreword This European Standard (EN 2591-220:2005) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). Af
16、ter 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 AECMA, prior to its presentation to CEN. This European Standard shall be given the status of
17、 a national standard, 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 p
18、atent rights. CEN and/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, Cz
19、ech 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 the United Kingdom. EN 2591-220:20054 1 Scope This standard specifies a
20、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 current and “ambient” heat to achieve the appropriate maximum rated operating temperature. I
21、t 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. For undated references, the latest edition of the referenced document (including any amen
22、dments) 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 methods Part 202: Contact resistance at rated current. EN 2591-417, Aerospace series Elements
23、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 specimens A test specimen shall consist of a wired male contact mated with the associated fema
24、le 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 rating shall be the same as, or exceeding, the maximum stated in the contact product standar
25、d. 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 more than 1 mm from, the end of the barrel or bucket. For the test, a number of identical
26、 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 cable, the balance using a minimum size cable. The sequence of testing shall be as given
27、in Table 1. EN 2591-220:20055 Table 1 Test sequence Test Reference Method Additional information Contact 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 a
28、nd not fitted in a connector. Contact resistance at rated current EN 2591-202 As per EN 3155-001 See Clause 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 t
29、he same cable size shall be connected in series and a thermocouple attached to a barrel or bucket to monitor 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, sh
30、all be applied. The temperature within the enclosure shall be raised so that the maximum contact temperature 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. T
31、his is defined as the “heat-on“ period. At the end of the “heat-on“ period, the heat and test current shall 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
32、 cycles shall be applied for specimens rated for use below 150 C and 1 500 cycles for specimens rated for 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 b
33、efore the commencement of cycling and then after every 100 cycles at a consistent temperature of (25 5) 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 p
34、eriod. 6.3 The final value of voltage drop across each joint shall not exceed 150 % of the initial voltage 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. Joinin
35、g materials or system to be used; 5. Crimp tools and settings, (if applicable). EN 2591-220:2005BS EN 2591-220:2005BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standa
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