1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2591 -21 7 Edition P 1 September 1995 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs Descriptors : Aircraft industry, aircraft equipment, electrical
2、connection equipment, test ENGLISH VERSION Aerospace series Elements of electrical and optical connection Test methods Part 21 7 : Voltage drop under specified current for terminal lugs and in-line splices Srie arospatiale Luft- und Raumfahrt Mthodes dessais Verbindungselemente Organes de connexion
3、lectrique et optique Partie 217 : Chute de tension sous courant spcifi pour cosses et prolongateurs Elektrische und optische Prfverfahren Teil 217 : Messung des Spannungsabfalls bei festgelegtem Strom fr Kabelschuhe und Stoverbinder This “Aerospace Series“ Prestandard has been drawn up under the res
4、ponsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of thi
5、s Prestandard, 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 signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services
6、 of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX Edition approved for public
7、ation Comments should be sent within six months after the date of publication to 1995-09-30 AECMA Gulledelle 94 B-1200 BRUXELLES C2 Chairman Mr. Pezzetta aecma 1995 AECMA PRENx2591- 217 95 10123LL 0009520 843 Page 3 prEN 2591-217 : 1995 1 Scope This standard specifies a method for measuring the volt
8、age drop under specified current in terminal lugs and in-line splices. It shall be used together with EN 2591 2 Normative references EN 2591 Aerospace series - Elements of electrical and optical connection - Test methods - General 3 Preparation of specimens The specimens shall be fitted with their n
9、ormal accessories, and wired up in accordance with the technical specification. The following details shall be specified in the technical specification : - number of specimens; - type of cable; - - - test current; - - requirement of initial measurements; - requirement of final measurements. installa
10、tion and wiring of specimens; length L separating the measurement points; types of accessories fitted to the specimens; 4 Method The voltage drop of the crimp shall be calculated by deducting the drop in voltage for the reference cable, from that of each specimen. The voltage drops in the specimens
11、and the reference cable between the measuring points (figures 1 and 2) shall be measured using the test current specified in the technical specification. The value for the calculated voltage drop of the crimp shall not exceed the value specified in the technical specification. Terminal lugs : Uc = (
12、Us-Ur)/2 in-line splices : Uc = Us-Ur Uc : voltage drop in the connection Us : voltage drop for the specimen Ur : voltage drop in the reference conductor. If the distance between the measurement points is different from L, adjust the measured values to this distance by calculation. AECMA PRENx2591-
13、217 95 1012311 0009523 78T W Page 4 prEN 2591 -21 7 : 1995 Ur t-=z- Reference cable Measurement point -/ 1 Measurement point Figure 1 - Measurement assembly for the voltage drop in terminal lugs Reference cable 7 Measurement point Measurement point 1 4 - us Figure 2 - Measurement assembly for the voltage drop in in-line splices
