ASD-STAN PREN 6059-503-2016 Aerospace series Electrical cables installation Protection sleeves Test methods Part 503 Temperature rise due to rated current injected on the sleeve (E.pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 6059-503 Edition P 2 April 2016 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.org ICS: 49.060 Supersedes edition P

2、1 of November 2010 and will supersede EN 6059-503:2012 Descriptors: ENGLISH VERSION Aerospace series Electrical cables, installation Protection sleeves Test methods Part 503: Temperature rise due to rated current injected on the sleeve Luft- und Raumfahrt Elektrische Leitungen, Installation Schutzsc

3、hluche Prfverfahren Teil 503: Erwrmung bei Nennstrom des Schutzschlauchs Srie arospatiale Cbles lectriques, installation Gaines de protection Mthodes dessais Partie 503 : chauffement sous courant nominal This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The

4、AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the techn

5、ical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification 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

6、 Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to 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 ap

7、proved for publication 1st April 2016 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2016 by ASD-STAN prEN 6059-503:2016 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Preparation of specimens . 3 4 Method 5 5 Requ

8、irements . 6 Foreword This standard was reviewed by the Domain Technical Coordinator of 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 6

9、059-503:2016 (E) 3 1 Scope This standard specifies a method of assessing the behaviour and temperature increase of EMI protection sleeves or conduits when subject to permanent and/or fault currents in the shielding of the conduit or sleeve material and their effect on the cables within the cable sle

10、eve. It shall be used together with EN 3475-100. 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 cited applies. For undated references, the latest editio

11、n of the referenced document (including any amendments) applies. EN 3475-100, Aerospace series Cables, electrical, aircraft use Test methods Part 100: General 3 Preparation of specimens 3.1 General Each specimen having 750 mm to 1 000 mm useful length between the supports, shall be installed horizon

12、tally in front of a screen and lightly stretched at the ends to avoid any slack during the test. The test shall be carried out at ambient temperature Ta (typically 20 C) in a chamber where the whole unit shall be sheltered from draughts. An extraction shall be provided but only operated after comple

13、tion of the test. To identify the appearance of smoke, a screen with black and white horizontal bands or any other device shall be used. 3.2 Preparation of specimens Specimens will be installed horizontally in a box with a background striped in white and black. To detect smoke appearance the box wil

14、l be transparent in the front. It will be closed to avoid any heat exchange. An exhaust fan will be added above the box in case of toxic fume generation (it shall not function during the test but only at the end and this to not disrupts the heating). As described below two (2) circuits are provided:

15、 the first one is for the connecting power and the second one is for the measurement. 3.3 Connecting system 3.3.1 General To ensure that the contacts bringing the current consider all the strands of the shielding, the following mounting is to be assured: A split ring will be placed between the bundl

16、e ant the sleeve. A CuNi flat braid of a section of 3,44 mm2 will be connected to the sleeve with a metallic clamp. Terminal lugs will be fixed at the flat braid extremities. prEN 6059-503:2016 (E) 4 3.3.2 First case (Figure 1) This proposition considers specimens without connectors at the ends. Key

17、 1 Sleeve 2 Cable bundle 3 Band-it 4 Split ring 5 Flat braid 6 Terminal lug 7 Measurement branch 8 Power branch Figure 1 3.3.3 Second case (Figure 2) This proposition considers specimens with connectors at the ends. Connectors are placed at the specimens extremities. Copper power bars are added. prE

18、N 6059-503:2016 (E) 5 Key 1 Cable bundle 2 Band-it 3 Connector (backshell-plug/receptable) 4 Split ring 5 Sleeve 6 Flat braid 7 Screw/nut 8 Measurement branch 9 Copper power bars Figure 2 4 Method The purpose of this test shall be to check that there is no smoke emission excessive increase of temper

19、ature for the nominal current, bringing the conductor to a temperature RT, and that for an overload current bringing the conductor to a temperature (Max RT 5 C or Max RT 10 C) there is neither ignition nor disappearance of non conductive materials. The test shall be performed with a current generato

20、r in DC or AC (400 Hz to 800 Hz RMS). The test shall be performed on sizes as defined in the concerned specification or product standard. The temperatures shall be determined by measuring the variation of the voltage drop in the central part of the cable (2/3 of the useful length maximum) between th

21、e voltage application points. prEN 6059-503:2016 (E) 6 20UU 20RR 1 0,004 ( 20) when Ta 20 C The current injection shall respect the curve shown in Figure 3. Figure 3 A Current C temperature RT Room temperature T0 to T0 time to stabilisation of temperature under initial current. T1 T0 1 min T2 T1 200

22、 ms T3 T2 500 ms T4 T3 200 ms T4 to T5 time to decrease temperature at least to reach RT 5 C, if this value have been pass, if not during 1 min 5 Requirements The temperature shall be in accordance with the curve shown in Figure 3. At In: no visible smoke or smell or appreciable change of colour (se

23、e Note); T shall be inferior to the value specified in product standard. At I1: no visible deterioration of materials (peeling, cracking) no spontaneous combustion and no visible smoke; T1 shall be inferior to the value specified in product standard. NOTE “Appreciable colour change” is to be defined as the original colour is still recognisable.