1、. Edition approved for publication 1992-06-05 CEN PRENx2591 (PART*CS) 92 M 3404589 O026956 T Comments should be sent within six months after the date of publicafion decision A.E.C.M.A. Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cdex - FRANCE A.E.C.M .A. STANDARD NORME A.
2、E.C.M.A. A.E.C.M.A. NORM prEN 2591 Part C5 Issue P 1 June 1992 DITE PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AEROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cdex - Tl. (11 47.36.98.76 UDC : Key words : ENGLISH VERSION Aerospace series Elements of
3、 electrical and optical connection Test methods Part C5 - Rapid change of temperature Srie arospatiale Luft- und Raumfahrt Mthodes dessais Prfverfahren Organes de connexion lectrique et optique Partie C5 - Variations rapides de temprature Elektrische und optische Verbindungselemente Teil C5 - Schnel
4、le Temperaturwechsei This Aerospace Series. pre-standard has been drawn up under the responsibility of Af CMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs ofAECMA-Members. It has been technically approvedby the experts of the con-cerne
5、d Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and signat
6、ure of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 1
7、99. rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX C2 Chairman M. J. LE CUNFF .” . P CEN PREN*257L (PART*C5) 72 m 3404589 002b757 L m prEN 2591-C5 Page 3 1 This standard specifies a method of assessing the ability of an element of connection to withstand rapid changes of temperature suc
8、h as might occur during transportation and use. It shall be used together with EN 2591. Scope and field of application 2 References EN 2591 EN 2591-A1 EN 2591-B6 EN 2591-B7 EN 2591-08 Aerospace series - Elements of electrical and optical connection - Test methods - General Aerospace series - Element
9、s of electrical and optical connection - Test methods - Part Al - Visual examination 1) Aerospace series - Elements of electrical and optical connection - Test methods - Part 66 - Measurement of insulation resistance 1) Aerospace series - Elements of electrical and optical connection - Test methods
10、- Part B7 - Voltage proof test 1) Aerospace series - Elements of electrical and optical connection - Test methods - Part D8 - Mating and unmating forces 21 3 Preparation of specimens 3.1 The specimens shall be fitted with their normal accessories, mounted and wired according to the technical specifi
11、cation. The technical specification shall specify whether elements of connection are mated or unmated and, if required, specify the number of times they shall be mated or unmated prior to the test. 1) In preparation at the date of publication of the present standard. 2) Published as AECMA pre-standa
12、rd at the date of publication of the present standard. Previous page is blank CEN PREN*259L (PART*C5) 92 m 3404589 0026958 3 m prEN 2591-C5 Page 4 3,2 Unless indicated in the technical specification, the following details shall be specified : - mated or unrnated elements of connection, - method of m
13、ounting and definition of the specimen wiring, - initial measurements and requirements, - degree of severity (temperatures TA and Tg and duration ti 1, - methods and requirements for final measurements. 4 Apparatus Two chambers, one for the low temperature and one for the high temperature shall be p
14、rovided. The location of the chambers shall be such as to allow a rapid transfer of specimens from one chamber to the other in less than 1 min. The chambers for the low temperature and for the high temperature shall be capable of maintaining, in any region where the specimens under test are placed,
15、the required temperatures f 3 %. The volume -of chambers shall be such that, after insertion of the test specimens, the temperature shall be within the specified tolerance after a time of not more than 5 min or IO % of the exposure time, whichever is the smaller. Unless otherwise specified in the te
16、chnical specification, the thermal conduction of the mounting or support shall be low, such that for practical purposes the specimen is thermally isolated. 5 Method 5.1 Initial measurements (if applicable) They shall be carried out as specified by the technical specification. 5.2 Procedure 5.2.1 The
17、 severity of the test shall be defined by the combination of the low and high temperatures of the specimen category and the number of cycles. 5.2.2 The number of cycles shall be 10, with a possible interruption (not exceeding 24 h) after the 5th cycle. R E CEN PRENu259L (PART*C5) 92 m 3404589 002695
18、9 5 m prEN 2591-C5 Page 5 5.2.3 The duration of exposure to each of the two temperatures depends upon the heat capacity of the specimen. It shall be 30 min, unless otherwise stipulated in the technical specification. 5.2.4 The specimen at the room temperature shall be subjected to the test cycle as
19、defined in figure 1. Temoerature in the chamber A I cvcie Time +t A : start of first cycle t, : shall be lower than 1 min Figure 1 - Test cycle 5.3 Recovery The period of recovery shall be as long as required by the specimen to reach the room temperature. 5.4 Final measurements and requirements (if applicable) The specimen shall be subjected to the tests in following sequence : - EN 2591-B7 - Voltage proof test, - EN 259 1 -B6 - Measurement of insulation resistance, - EN 2591-Al - Visual examination, - EN 2591-D8 - Mating and unmathg forces.
