1、ASD STANDARD NORME ASD ASD NORM prEN 6059-502 Edition P 1 February 2009 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 775 8131 - www.asd-stan.orgICS: Descriptors: ENGLISH VERSION
2、 Aerospace series Electrical cables, installation Protection sleeves Test methods Part 502: Resistance to electrical arcs Srie arospatiale Cbles lectriques, installation Gaines de protection Mthodes dessais Partie 502 : Rsistance aux arcs lectriques Luft- und Raumfahrt Elektrische Leitungen, Install
3、ation Schutzschluche Prfverfahren Teil 502: Lichtbogenfestigkeit 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 Industry
4、. 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 o
5、f 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 im
6、plement 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 28 February 2009 Comments should be sent within six months after the date of publication to ASD-STAN Engineering Pro
7、cedures Domain Copyright 2009 by ASD-STAN Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 6059-502:20092 Contents Page Foreword2 1 Scope 3 2 Normative references 3 3 Specimen requirements 3 4 Definiti
8、on and preparation of specimen4 5 Apparatus .8 6 Method . 11 7 Requirements 12 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 M
9、anual, this standard has received approval for Publication. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 6059-502:2009 3 1 Scope This standard specifies a method of assessing the behaviour of prote
10、ction sleeves or conduits subject to an external electric arc, ever at 115 Vac or 230 Vac 400 Hz. This standard shall be used together with EN 6059-100. The primary aim of this test is to produce, in a controlled fashion, electric arcs at the immediate vicinity of a protection sleeve or conduit and
11、to examine possible consequences on cables inside this protection, which are supposed to be maintained in a safe condition. These electric arcs are representative of those, which may occur in service when a typical cable bundle is severely damaged. In order to optimize thickness and mass of such pro
12、tection, it is necessary to associate a current limit In to each sleeves or conduits construction. Two levels of prospective fault current are specified for all protection sizes. 2 Normative references The following referenced documents are indispensable for the application of this document. For dat
13、ed references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2350, Aerospace series Circuit breakers Technical specification. EN 2267-010, Aerospace series Cables, electrical, for general purpose Operating
14、 temperatures between 55 C and 260 C Part 010: DR family, single UV laser printable Product standard. EN 3475-302, Aerospace series Cables, electrical, aircraft use Test methods Part 302: Voltage proof test. EN 6059-100, Aerospace series Electrical cables, installation Protection sleeves Test method
15、s Part 100: General. 1)EN 6059-501, Aerospace series Electrical cables, installation Protection sleeves Test methods Part 501: Voltage proof test. 1)A-A-52083, Specification for tape lacing and tying. 2)3 Specimen requirements Protection sleeves or conduits to be tested shall be of traceable origin
16、and, unless otherwise specified, shall have passed the voltage proof test (EN 6059-501) as defined in the concerned product standard. 1) Published as ASD Prestandard at the date of publication of this standard. 2) Published by Customer Service, Defense Printing Service Detachment Office, 700 Robbins
17、 Ave, Building 4D, Philadelphia PA 19111-5094 USA. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 6059-502:2009 4 Unless otherwise specified in the concerned technical product standard, at least one
18、size of protection sleeve per sleeve thickness or construction type (if different from one size to another) shall be assessed. If possible for each thickness or construction type the test must be performed on a sample having the minimum authorized thickness or minimum authorized mass. 4 Definition a
19、nd preparation of specimen 4.1 Protected bundle (bundle P) Bundles P are made of arc tracking resistant cables, typically from EN 2267-010 product standard unless otherwise specified in the concerned protection sleeves product standard, with bundle external protection to be tested. The cable bundle
20、outer diameter shall be as closed as possible to the internal diameter of the protection to be tested. This diameter is obtained: with a full assembly of size 24 cables, or with a central part in various cable types covered with a full and uniform layer of size 24 cables. For open protection sleeves
21、 with an overlapping, in any case the overlap must be placed in front of the short circuit area. 4.2 Aggressive bundle (bundle A) 4.2.1 Definition and constitution Bundles A are made of 7 arc-tracking resistant cables, typically from EN 2267-010 product standard unless otherwise specified in the con
22、cerned protection sleeves product standard, without bundle external protection. The short circuit will be created on these bundles (see 4.3). The cables gauge is chosen in Table 1, in accordance with the In limit specified for the protection sleeves. Table 1 Choice of cable gauge In Amp. CB ratings
23、3 5 7,5 10 10 15 20 25 50 Gauge 26 24 22 20 18 16 14 12 10 Circuit breaker used to protect these cables must be also in accordance with Table 1. EXAMPLE If the sleeve must provide a 15 amp. protection, take gauge 16 cables to built the bundle with 15 amp. CB ratings. For information the diameter of
24、the bundle will be three times the cable diameter. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 6059-502:2009 5 4.2.2 Preparation Cut seven separate lengths of approximately 0,5 m consecutively fro
25、m one length of cable, and strip one of the ends of insulation to permit electrical connection. Clean each length of cable with a clean cloth moistened with propan-2-ol (isopropyl alcohol) fluid. 4.2.3 Lay up the seven cables as follows a) Form the cables in a six around one configuration as shown i
26、n Figure 1. b) Ensure that all cables are straight and geometrically parallel, and restrained by ties such that they are in continuous contact at least within the test zone. c) Position the ties at 50 mm spacing toward the end of the specimen as shown in Figure 2. NOTE The tie material shall be PTFE
27、 glass lacing tape conforming to A-A-52083, finish D size 3. A1-A2 : Phase A B1-B2 : Phase B C1-C2 : Phase C N : Neutral cable connected to earth Key 1 Drop needle Figure 1 Specimen configuration 1(10 2) mm C2 N C1 B1 A1 B2 A2 Copyright ASD-STAN Provided by IHS under license with AECMA Not for Resal
28、eNo reproduction or networking permitted without license from IHS-,-,-prEN 6059-502:20096 Key 1 Cable tie 2 Drop needle 3 Drops 4 10 mm to 20 mm 5 Ends of the 7 cables in the same plane Figure 2 Test configuration 4.3 Test configuration The bundles A shall be attached on bundle P by qualified tyraps
29、, according to the following Figure 3 and illustrated by photo next page. 50 mm 1 10 234 5 Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 6059-502:2009 7 Key 1 Ends of the 7 cables in the same plane
30、2 10 mm to 20 mm 3 Cable ties 4 Tyraps 5 Two attachment points 6 Length and end of bundle sample to be define with mechanical test setup 7 Drops 8 Protection 9 Bundle P 10 Bundle A Figure 3 Test bundles configuration 1Area for droplet 250 mm 100 mm10 3 2 45 7 8 69 10 Copyright ASD-STAN Provided by I
31、HS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 6059-502:20098 Illustration 5 Apparatus 5.1 Electrical equipment 5.1.1 For 115 Vac 400 Hz network Connect the seven cables of the test sample within a circuit as shown in Figure 4. Thi
32、s circuit shall have the following requirements: a) The provision of adjustable levels of prospective fault currents for the six A, B and C cables. b) A three phase 200/115 Vac 400 Hz star (Y) connected supply shall be derived from a dedicated rotary machine capable of sustaining the maximum prospec
33、tive fault current given in Table 1 for at least sufficient time for circuit protection to operate. In any case the generator shall have a 1 min rating of not less than 15 kVA. c) Circuit breakers shall be rated as given in Table 2 and shall be single pole units. They shall have trip characteristics
34、 in accordance with EN 2350 or as required in the product specification. NOTE In particular case, others ratings of thermal breaker protection could be employed in accordance with aircraft manufacturer rules. d) The electrical power source shall be appropriately protected and it shall be established
35、 that no combination of test circuit events would activate this protection. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 6059-502:2009 9 e) The ballast Rb resistors shall be non inductive and of ap
36、propriate power rating. Care shall be taken to position all laboratory wiring such that inductive effects are reduced to a practical minimum. Supply cables shall be as short as possible. The ballast resistor Rb is in order to prevent over voltage (115 - 115 W per phase) during the arc extinction pha
37、ses (opening of an inductive circuit). f) A rheostat, Rf, limiting maximum short-circuit current per phase by simulating a line length. g) Appropriate instrumentation, recording and switching control shall be installed in accordance with good laboratory practice. Key 1 Supply protection 2 Test bundl
38、e Figure 4 Test schematic circuit 5.1.2 For 230 Vac 400 Hz network a) Apply 5.1.1 with the following modifications: in b) replace “200/115 Vac 400Hz” by “400/230 Vac 400Hz”; in e) replace “115 - 115 W per phase” by “230 - 230 W per phase”. RfV V N UV A2A1C1C2D2B1B2N1 2 RbCopyright ASD-STAN Provided
39、by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 6059-502:2009 10 b) Except if CBs are defined for 230 Vac uses, before starting tests, there must be CB preliminary verifications: Verify each CB voltage drop under his nominal int
40、ensity. Made a short-circuit directly on the terminals of each CB with a shunt without resistance. Verify again the voltage drop. Repeat five times this cycle. There must be no significant variations in the voltage drop values. If variations or bad tendency occur, CB must be changed after each tripp
41、ing. 5.2 Test equipment Construct an apparatus as shown diagrammatically in Figure 2 which includes the following minimum provisions: a) Electrical terminations to provide a ready means of connecting test specimens into the circuit as shown in Figure 3. b) A transparent enclosure to protect personne
42、l from ejected molten metal and short wavelength ultra violet light. c) An electrolyte delivery system which provides a constant rate of (100 10) mg/min and dispenses drops from an 18 gauge needle, cut of square at the outlet. NOTE The needle wall thickness shall be selected such that the specified
43、flow rate shall be delivered at approximately 6 drops per minute. 5.3 Test protocol 5.3.1 The procedure embraces at least one size of protection sleeve per sleeve thickness or construction type and for each two values of prospective fault current, to be set by adjustment of resistances Rf have been
44、defined in Table 2. Performance of the protection at a given maximum fault current shall be determined by testing three specimens. Thus six specimens are required for each protection size. 5.3.2 Additional testing of other sizes may be deemed necessary in particular cases and values of prospective f
45、ault currents, the ratings of thermal breaker protection which are typical of aircraft use have been included in Table 1. 5.3.3 It is emphasized that electrical arcing tests are essentially destructive and can be hazardous to personnel. Therefore tests should be undertaken with all observers shielde
46、d from direct physical and visual exposure as noted in 5.2 b). The use of video recording for all tests is required. 5.4 Test rig set-up 5.4.1 Install the rating of circuit breaker appropriate to the cable size used for the test (Table 2). 5.4.2 Heavy duty electrical shorting connections shall be fi
47、tted in substitution of a test sample to enable prospective fault currents to be set by adjustment of resistances Rf. Because these currents would trip the thermal breakers very rapidly these shall be shunted to permit the pulsing of current until the desired value is obtained. Re-instate the therma
48、l protection. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 6059-502:200911 5.4.3 Prepare a solution in distilled or de-ionized water of 2 % by mass of ammonium chloride and (0,1 0,01) % by mass of isooctylphenolpolyethoxyethanal, the polyethoxy chain to contain approximately 10 ethoxy units (triton -100). Exceptionally, in the circumstances given in 6.1.2, the surfactant may be changed to ammonium perfluoro
