1、CEN PRENx2593 (pARTxB3) 92 D 3404589 0033535 580 . - Approved by lhe eqwvalent versions in French and German languages can be supplied COMITC DE NORMALISATION by B N A E . lechnopolis 54 . 199, rue Jean Jacques Rousseau Of A.E.C.M.A. 1992-11-02 92138 ISSY LES MOULINEAUX CEDEX - FRANCE A. E .C. M. A.
2、 STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM - - prEN 2591 Part 83 Edition 1 November 1992 EDITE PAR LASSOCIATION EUROPCENNE DES CONSTRUCTEURS DE MATCRIEL 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
3、.1 Key words : Aircraft industry, aircraft equipment, connecting equipment, tests, measurements, emjcal resistance, contact resistance, tests duration ENGLISH VERSION Aerospace series Elements of electrical and optical connection Test methods 1 Part 63 - Electrical continuity at microvolt level Srie
4、 arospatiale Luft- und Raumfahrt lectrique et optique Verbindungselemente Organes de connexion Elektrische und optische Mthodes dessais Prfverfahren Partie 83 - Continuit lectrique au niveau des microvolts Teil 83 - Kontinuierlicher Stromdurchgang im Mikrovoltbereich This *Aerospace series. standard
5、 has been drawn up under the responsibility of AECMA (Association 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 Standardizari
6、on) for final vote. CEN PREN*2591 (PARTrB3) 92 -_ 3404589 O033536 437 I prEN 259 1 -B3 Page 3 1 Scope and field of application This standard specifies a method for measuring the electrical continuity of a pair of mated contacts and their terminations at microvolt level, .e. when the current flowing
7、across the contacts is very low with respect to nominal current rating. It shall be used together with EN 2591. A 2 References IEC 50(302) International electrotechnical vocabulary - Chapter 302 : Electrical measuring instruments EN 2591 Aerospace series - Elements of electrical and optical connecti
8、on - Test methods - General 3 Preparation of specimens 3.1 The contacts concerned shall not have been subjected to any prior fatigue test or heating at rated current. Elements of connection shall be mated and fitted with their contacts wired in accordance with the technical specification. The electr
9、ical continuity shall be measured individually across each pair of contacts. 3.2 Unless indicated in the technical specification, the following details shall be specified : - input voltage UE, - admissible value for voltage variation (UE - UA), - type of cable, test duration. 4 Apparatus Voltmeters
10、shall be of the 0,5 class and have an internal resistance higher than or equal to 10 Mn (see IEC 50(302). A schematic diagram of the test apparatus is shown in figure 1. - Previous page is blank I CEN PRENM259L (PART*wB3) 92 = 3404589 0033537 353 -_ prEN 259 1 -B3 Page 4 -e “* U, = constant t (-cl -
11、 Figure 1 5 Method 5.1 Procedure Measurements shall be carried out with d.c. current in both directions. The input voltage UE shall be adjusted to the value specified in the technical specification and maintained constant at Voltage shall be recorded throughout the test duration specified by the technical specification. Polarity shall be reversed half-way through the test. 5.2 Requirement The variation recorded shall not exceed the specified value. 1 %.
