ASD-STAN PREN 2591-315-2014 Aerospace series Elements of electrical and optical connection Test methods Part 315 Resistance to fluids (Edition P 1).pdf

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1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 2591-315 Edition P 1 July 2014 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONRue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.orgICS: Will supersede EN 2591-315:1998

2、 Descriptors: ENGLISH VERSION Aerospace series Elements of electrical and optical connection Test methods Part 315: Resistance to fluids Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 315 : Rsistance aux fluides Luft- und Raumfahrt Elektrische und optische Verbindu

3、ngselemente Prfverfahren Teil 315: Bestndigkeit gegen Flssigkeiten This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Indust

4、ry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification

5、 of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to

6、implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 1stJuly 2014 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain

7、 Copyright 2014 by ASD-STAN prEN 2591-315:2014 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Test Fluids 3 4 Preparation of specimens .4 5 Method 4 6 Final measurements and requirements (if applicable) 6 Foreword This standard was reviewed by the Domain Technical Coordinator of

8、 ASD-STANs Electrical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 2591-315:2014 (E) 3 1 Scope This standard specifies the method of determining the fluid

9、resistance of a connector, or cable accessory. It shall be used together with EN 2591-100 and EN 3909. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition ci

10、ted applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2591-100, Aerospace series Elements of electrical and optical connection Test methods Part 100: General EN 2591-101, Aerospace series Elements of electrical and optical connectio

11、n Test methods Part 101: Visual examination EN 2591-206, Aerospace series Elements of electrical and optical connection Test methods Part 206: Measurement of insulation resistance EN 2591-408, Aerospace series Elements of electrical and optical connection Test methods Part 408: Mating and unmating f

12、orces EN 2591-409, Aerospace series Elements of electrical and optical connection Test methods Part 409: Contact retention in insert EN 3909, Aerospace series Test fluids for electrical and optical components and sub-assemblies 3 Test Fluids Unless otherwise specified in the Product Standard, the sa

13、mples under test shall be exposed to each of the fluid types listed in Table 1 below. Each fluid shall be selected from the fluid groups in EN 3909. Table 1 Types of test fluid to be used Fluid group number Fluid family name Test fluid type (variant) No of fluids to be selected per test Remarks (e.g

14、. test temperature) Group 1 Fuels Hydrocarbon 1 - Biofuel - Group 2 Hydraulic Fluids Mineral 1 - Synthetic - Group 3 Oils Mineral 1 - Synthetic - Group 4 Cleaning Fluids Optional 1 - Group 5 De-Icing Fluids Runway 1 - Aircraft 1 - Group 6 Fire Extinguishant - 1 -aGroup 7 Cooling Fluid - 1 - aDue to

15、restrictions and applicable by local laws, fire extinguishant shall not be discharged in non-critical situations. prEN 2591-315:2014 (E) 4 4 Preparation of specimens 4.1 Unless otherwise specified in the relevant Technical Specification or Product Standard, specimens shall be prepared as follows to

16、comply with Figure 1 and Figure 2. Each specimen shall be visibly inspected for any imperfections, clean, dry and free from any contaminants that do not comprise the ready for use product. Unwired cavities shall be fitted with contacts and sealing plugs. 20 % of cavities shall be fitted with sealing

17、 plugs and for connectors with less than 5 cavities, 1 cavity shall be fitted with a sealing plug. All remaining cavities shall be fitted with wired contacts. Wired contacts shall be fitted with sufficient cable to enable the test sample to be fully immersed in the test fluid chamber. Care shall be

18、taken to ensure the sample is not subjected to unnecessary load or deformation (e.g. due to taught cables or cable alignment at the rear of the connector or accessory). See Figure 1. 4.2 The following details shall be stated in the Product Standard or Technical Specification: types of fluids (and th

19、e substance application method if different to herein). number of specimens (if different from one per test fluid). mounting method, type of cable and definition of specimen wiring. number of cycles. temperature (T1) and duration of the first phase. initial measurements (if applicable). method accor

20、ding to EN 2591-206 and insulation resistance value. temperature (T2) and duration for the third phase. final measurements and requirements (if applicable). 5 Method 5.1 Initial measurements (if applicable in the Product Standard or Technical Specification) Measurements shall be carried out as speci

21、fied in the Product Standard or Technical Specification. prEN 2591-315:2014 (E) 5 5.2 Procedure Each specimen shall be subjected to only one of the specified fluids. A fluid shall be selected from each of the test fluid categories in accordance with Table 1 and EN 3909. Key 1 Test fluid 2 Test chamb

22、er 3 Sufficient cable (when fitted) to avoid undue strain on the assembly 4 Test sample(s). Mated or unmated in accordance with the Product Standard or Technical Specification requirements Figure 1 Typical test set-up If the test fluid is a gas at the designated test temperature, the fluid shall be

23、omitted from the test (unless otherwise instructed by the test authority). All test instructions shall include all commensurate health and safety instructions. Key 1 First phase 2 Second phase 3 Third phase Each cycle comprises three phases. Figure 2 Test cycle prEN 2591-315:2014 (E) 6 5.2.1 First p

24、hase Fluids: immersion (unless otherwise specified in the Technical Specification or Product Standard). Specimens shall be unmated. The specimens and the fluid shall be brought to the temperature specified (T1). Fully immerse the specimens for (15 5) min at the test temperature. The temperature of t

25、he fluid shall not exceed the temperature limit of the specimen. The upper rated temperature limit of the specimen shall be considered the maximum test temperature if there is a conflict. NOTE If more viscous substances with the consistency of grease, etc., are instructed in the Technical Specificat

26、ion or Product Standard their application shall be: Grease: application The specimens shall be mated unless otherwise specified. The grease shall be spread in a fine film with a brush all over the specimens. The specimens and the grease shall be brought to the specified temperature (T1). The specime

27、ns shall then be placed in an oven for (15 5) min. 5.2.2 Second phase Fluids The specimens shall be removed from the fluid and stored at ambient conditions for (7 0,5) h. The specimens shall be allowed to drain, to remove trapped fluid (not wiped dry), in still air during storage. Greases The specim

28、ens shall be unmated and stored at ambient conditions for (7 0,5) h. If the grease has become fluid it shall be allowed to drain, to remove trapped fluid (not wiped dry), in still air during storage. 5.2.3 Third phase The specimens shall be mated and placed in a pre-heated oven (the oven air shall b

29、e circulated and renewed), the samples shall be subjected to the specified temperature (T2) for (16 0,5) h, unless otherwise specified. If the third phase temperature is not specified it shall be (65 2) C. NOTE If the test is carried out at a temperature exceeding the flash point, appropriate safety

30、 measures shall be taken. 5.2.4 Number of cycles The number of cycles shall be in accordance with the Technical Specification or Product Standard. If the number of cycles is not specified the cycle shall be repeated four times (five cycles in total). 6 Final measurements and requirements (if applica

31、ble) The final measurements shall be conducted at room temperature and without cleaning the specimens. All specimens shall be subjected to the following test sequence after this test: EN 2591-101: a discolouration is admissible. EN 2591-206: applicable to specimens exposed to non-conducting test fluids (except mated connectors during phase 1). EN 2591-408: specimens may be lubricated if specified. EN 2591-409.