1、 AECMA PRENs2591- 218 95 101231l 0009522 bLb Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months C2 Chairman after the date of publication to prEN 2591-218 Edition P 1 September 1995 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUS
2、TRIES (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 connection equipment, test ENGLISH VERSION Aerospace series Elements of electrical and optical connection Test methods Part 218 : Agein
3、g of terminal lugs and in-line splices by temperature and current cycling Srie arospatiale Luft- und Raumfahrt Mthodes dessais Verbindungselemente Organes de connexion lectrique et optique Partie 218 : Vieillissement des cosses et des prolongateurs par cyclage en temprature et en courant Elektrische
4、 und optische Prf verf ahren Teil 218 : Alterung von Kabelschuhen und Stoverbindern durch zyklische Temperatur- und Strombelastung This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green pape
5、r 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 this Prestandard, the technical content shall not be changed to an extent that interchangeability is affe
6、cted, physically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre INPSI and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee
7、for Standardization) for formal vote. 1995-09-30 AECMA Gulledelle 94 B-1200 BRUXELLES Mr. Pezzetta I I aecma 199! Page 3 prEN 2591-218 : 1995 5 135OC 135OC i Scope 750 1 500 This standard specifies a method for ageing terminal lugs and in-line splices by temperature and current cy cl i ng . 2 Normat
8、ive references EN 2591 Aerospace series - Elements of electrical and optical connection - Test methods - EN 2591-217 Aerospace series - Elements of electrical and optical connection - Test methods - General Part 21 7 : Voltage drop under specified current for terminal lugs and in-line splices 3 Prep
9、aration of specimens The specimens shall be fitted with their normal accessories, fitted 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; - - cycling current; - - requirement
10、 of initial measurements; - requirement of final measurements. installation and wiring of specimens; types of accessories fitted to the specimens; 4 Method 4.1 Severity 4.1 .I The temperature to be reached (see product standard) determines the number of cycles to which the specimens shall be subject
11、ed in accordance with the table 1 : Crimped terminal lugs and in-line splices on copper cable Table 1 I Operating temperature I Number of cycles I 4.1.2 All the specimens shall be subjected to 1 500 cycles. Crimped terminal lugs and in-line splices on aluminium cable 1) Published as AECMA Prestandar
12、d at the date of publication of this standard _ AECMA PREN*259L- 2L 95 W 10L23LL O009525 325 Requirement value (after testing) Page 4 prEN 2591 -21 8 : 1995 1 b 1 Dmax. 5 Method The specimens and the reference cable shall be subjected to the specified number of cycles comprising : - increasing the v
13、oltage (d.c.1 allowing the ageing temperature (maximum temperature sustained by the cable) to be reached in the conductor of the cable; - - - maintaining the higher temperature for 15 min; lowering the voltage to revert to a temperature 5 3OOC; maintaining the lower temperature for 5 min. NOTE 1 : T
14、he cycling current shall be determined for each type of cable. NOTE 2 : This test is hazardous for the operator on account of the intensities and voltages utilized. 6 Requirement 6.1 Crimped terminal lugs and in-line splices on copper cable The voltage drop in each crimp measured in accordance with
15、EN 2591-217 shall not exceed the values specified in the technical specification. In addition, value D max. shall not exceed the value below. D max. equals to 20% of the value measured at 500 cycles or 1 O00 cycles according to the degree of severity (figure 1 I. Temperature S 135 “C 500 750 Number
16、of cycles Temperature 135 “C 1 O00 1500 Figure 1 6.2 Measurements of the loss of voltage under nominal current (d.c.) are made on the following cycles : 1, 50, 100, 150, 300, 500, 750, 1 000,l 200, 1 300, 1 400 and 1 500. Crimped terminal lugs and in-line splices on aluminium cable The temperature of the terminal lug or in-line splice shall remain lower than that of the cable.
