SIST EN 3475-603:2007
(Main)Aerospace series - Cables, electrical, aircraft use - Test methods - Part 603: Resistance to wet arc tracking
Aerospace series - Cables, electrical, aircraft use - Test methods - Part 603: Resistance to wet arc tracking
This standard specifies a method of assessing the behaviour of cable insulation subject to an electric arc initiated by contaminating fluid along the surface of the insulation.
This Standard shall be used together with EN 3475-100.
The primary aim of this test is to produce, in a controlled fashion the failure effects, which are representative of those, which may occur in service when a typical cable bundle is damaged and subjected to aqueous fluid contamination. Electrical arcing occurs along the surface of the insulation between damage sites on adjacent cables.
Unless otherwise specified in the technical/product standard sizes 002, 006 and 020 cable shall be assessed.
Six levels of prospective fault current have been specified for cable sizes 001 to 050.
Luft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 603: Lichtbogenfestigkeit, feucht
Diese Norm legt ein Verfahren zur Beurteilung des Verhaltens der Isolierung einer Leitung gegenüber einem elektrischen Lichtbogen fest, der durch eine Verunreinigungsflüssigkeit entlang der Oberfläche der Isolierung erzeugt wird.
Diese Norm muss in Verbindung mit EN 3475 100 angewendet werden.
Der Hauptzweck dieser Prüfung besteht darin, auf geregelte Weise Fehlereffekte zu erzeugen, die repräsentativ sind für solche, die im Betrieb auftreten können, wenn ein typisches Leitungsbündel beschädigt und einer Verunreinigung durch wässrige Flüssigkeit ausgesetzt wird. Der elektrische Lichtbogen entsteht entlang der Isolierung zwischen den beschädigten Stellen der benachbarten Leitungen.
Sofern nicht anderes in der Technischen Lieferbedingung/Produktnorm festgelegt ist, müssen die Leitungs-größen 002, 006 und 020 bewertet werden.
Sechs prospektive Fehlerstromwerte wurden für die Leitungsgrößen 001 bis 050 festgelegt.
Série aérospatiale - Câbles électriques a usage aéronautique - Méthodes d'essais - Partie 603 : Résistance a l'amorçage et a la propagation d'arc électrique, essai humide
Aeronavtika - Električni kabli za uporabo v zračnih plovilih - Preskusne metode - 603. del: Odpornost proti električnemu obloku v vlažnih razmerah
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Cables, electrical, aircraft use - Test methods - Part 603: Resistance to wet arc trackingSérie aérospatiale - Câbles électriques a usage aéronautique - Méthodes d'essais - Partie 603 : Résistance a l'amorçage et a la propagation d'arc électrique, essai humideLuft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 603: Lichtbogenfestigkeit, feuchtTa slovenski standard je istoveten z:EN 3475-603:2007SIST EN 3475-603:2007en49.060Aerospace electric equipment and systemsICS:SIST EN 3475-603:20041DGRPHãþDSLOVENSKI
STANDARDSIST EN 3475-603:200701-november-2007
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3475-603August 2007ICS 49.060Supersedes EN 3475-603:2002
English VersionAerospace series - Cables, electrical, aircraft use - Testmethods - Part 603: Resistance to wet arc trackingSérie aérospatiale
- Câbles électriques à usageaéronautique - Méthodes d'essais - Partie 603 : Résistanceà l'amorçage et à la propagation d'arc électrique, essaihumideLuft- und Raumfahrt - Elektrische Leitungen fürLuftfahrtverwendung - Prüfverfahren - Teil 603:Lichtbogenfestigkeit, feuchtThis European Standard was approved by CEN on 21 June 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3475-603:2007: E
EN 3475-603:2007 (E) 2 Contents Foreword.3 1 Scope.4 2 Normative references.4 3 Specimen requirements.4 4 Preparation of specimen.4 5 Apparatus.6 6 Method.9 7 Requirements.9
EN 3475-603:2007 (E) 3 Foreword This document (EN 3475-603:2007) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2008, and conflicting national standards shall be withdrawn at the latest by February 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 3475-603:2002. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
EN 3475-603:2007 (E) 4 1 Scope This standard specifies a method of assessing the behaviour of cable insulation subject to an electric arc initiated by contaminating fluid along the surface of the insulation. This Standard shall be used together with EN 3475-100. The primary aim of this test is to produce, in a controlled fashion the failure effects, which are representative of those, which may occur in service when a typical cable bundle is damaged and subjected to aqueous fluid contamination. Electrical arcing occurs along the surface of the insulation between damage sites on adjacent cables. Unless otherwise specified in the technical/product standard sizes 002, 006 and 020 cable shall be assessed. Six levels of prospective fault current have been specified for cable sizes 001 to 050. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated 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 3475-100, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 100: General. EN 3475-302, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 302: Voltage proof test. A-A-52083, Tape, lacing and tying, glass. 1) 3 Specimen requirements Cables to be tested shall be of traceable origin and shall have passed the high voltage dielectric test defined in the product standard. 4 Preparation of specimen 4.1 Cut seven separate lengths approximately 0,5 m consecutively from one length of cable, and strip each 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. Damage two lengths of the cable by inflicting a cut around the total circumference at the mid-point of the length, taking care to ensure that the cut penetrates to the conductor around the full circumference and has a width of 0,5 mm to 1,0 mm.
1) Published by Department of Defense Industrial Supply Center, ATTN: DISC-BBEE, 700 Robbins Avenue, Philadelphia, PA 19111-5096 – USA.
EN 3475-603:2007 (E) 5 4.2 Lay up the seven cables as follows: a) Form the cables in a six around one configuration as shown in Figure 1. b) Displace the damaged cables longitudinally such that a separation of (10 ± 0,5) mm of undamaged insulation is provided as shown in Figure 2. This is called the test zone. c) Ensure that cables are straight and geometrically parallel, and restrained by ties such that they are in continuous contact within the test zone. d) Position the ties (4 ± 1,0) mm away from outer each notch and then at 15 mm to 20 mm spacing towards the ends of the specimen as show in Figure 2. The tie material used adjacent to the notch shall be PTFE glass lacing tape conforming to A-A-52083 type IV, finish D, size 3. e) Number the cables as shown in Figure 1 such that the fault cables are numbers A1 and B1 and the centre is N. Cables C1, A2, B2 and C2 are grouped around N.
Key 1 Drop needle A1-A2 : Phase A B1-B2 : Phase B C1-C2 : Phase C N : Neutral cable connected to earth Figure 1 — Specimen configuration A1B1C2NC1B2A2(10 ± 2) mm1
EN 3475-603:2007 (E) 6
Key 1 Test z
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