1、CEN PRENm259L (PART*BB) 92 m 3404589 0033529 O75 m - Approved by COMITE DE NORMALISATION of A.E.C.M.A. 1992-11-02 A. E.C. M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM The equivalent versions tn French and German languages can he supplied by B N A E - Technopolis 54 199. rue Jean-Jacques Rousseau
2、 _- - 92138 ISSY 1ES MOULINEAUX CEDEX - FRANCE prEN 2591 Part 68 Edition 1 November 1992 EDITC PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL Technopolis - 175. rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cdex - Tl. (1) 47.36.98 76 UDC : 621.316.541 : 681.3 : 620.1
3、 Key words : Aircraft indiistry, aircraft equipment, connecting equipment, tests, measurements, temperature rise, rated currents ENGLISH VERSION Aerospace series Elements of electrical and optical connection Test methods Part 68 - Temperature rise due to rated current Srie arospatiale Organes de con
4、nexion lectrique et optique Mthodes dessais Partie 68 - Echauffement sous courant nominal Luft- und Raumfahrt Elektrische und optische Verbindungselernente Prfverf a hren Teil B8 - Erwrmung bei Nennstrom This *Aerospace seriesmstandardhas been drawn up under the responsibilit y of AECMA (Association
5、 Europenne des Constructeurs de Matriel Arospatial). It is published on yellow paper in three equivalent versions English, French, German). It will be submitted as a draft European Standard to CEN(European Committee for Standardization) for final vote. :o aecriia 1992 CEN PREN*i2591 (PARTaB8) 92 m 3
6、404589 0033530 897 = -. prEN 2591-B8 Page 3 1 Scope and field of application This standard specifies a method for measuring the temperature rise in an element of connection due to rated current. It shall be used together with EN 2591. 2 References IEC 50(302) International electrotechnical vocabular
7、y - Chapter 302 : Electrical measuring instruments EN 2591 Aerospace series - Elements of electrical and optical connection - Test methods - General 3 Preparation of specimens 3.1 Specimens shall be wired, contacts connected in series and mated. The cross-section and the type of wire connecting the
8、contacts together shall be appropriate to the expected test current and temperature. The length of wire between two contacts shall be between 250 mm and 300 mm. The supply cable length shall meet the test Set-up requirements. The freely hanging specimen shall be fitted with temperature sensors. 3.2
9、Unless indicated in the technical specification, the following details shall be specified : - mounting and sensitivity of temperature sensors. - cross section and type of wire. - alternating or direct current. - ambient temperature. - maximum permissible temperature rise. 4 Apparatus The class of ap
10、paratus to be used shall be at least equal to 0,5 (see IEC 50(302). A regulated power supply shall be capable of delivering the specified current to f_ 1 % during the whole test. Previous page is blank CEN PREN*25L (PART*8) 92 m 3404589 0033531 723 m - prEN 2591-B8 Page 4 5 Method 5.1 Procedure The
11、test shall be carried out with : - direct current or - alternating current r.m.s., 40 Hz to 60 Hz. The sensors used shall not affect the temperature rise in the specimens or induce measurement errors. During the test, the specimen shall be protected from draughts by four non-heat- reflecting shields
12、 which shall not affect the temperature rise. They shall be so installed as to allow a clearance of 250 mm to 300 mm around the specimen. During the test, the temperature of the environment close to the specimen shall be recorded when the temperature variation has not exceeded 1 OC for 30 min or after a maximum of 5 h. 5.2 Requirement The measured value shall not be greater than that specified. 1 ci
