SIST EN 3475-604:2010
(Main)Aerospace series - Cables, electrical, aircraft use - Test methods - Part 604: Resistance to dry arc propagation
Aerospace series - Cables, electrical, aircraft use - Test methods - Part 604: Resistance to dry arc propagation
This European Standard specifies a method for appraising the behaviour of cable insulation when an electric arc is initiated and maintained by two powered cables rubbing against a blade.This standard should be used together with EN 3475- 100.The primary aim of this test is:- to produce, in a controlled fashion, continuous failure effects which are representative of those which may occur in service when a typical cable bundle is damaged by abrasion such that electrical arcing occurs, both between cables and between cables and conductive structure; and- to examine the aptitude of the insulation to track, to propagate electric arc to the electrical origin.Originally defined for 115 Vac network, this test also proposes conditions for 230 Vac network. Unless otherwise specified in product standard, only 115 Vac conditions shall be satisfied.Six levels of prospective fault current have been specified for concerned cable sizes (see Clause 7). It is generally agreed that larger sizes need not be assessed since the short-circuit phenomenon becomes dominant at low line impedances.Unless otherwise specified in the technical/product standard sizes 002, 006 and 020 cable should be assessed.
Luft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 604: Lichtbogenfestigkeit, trocken
Diese Norm legt ein Verfahren zur Beurteilung des Verhaltens der Isolierung einer Leitung gegenüber einem
elektrischen Lichtbogen fest, der durch zwei stromführende Leitungen erzeugt und aufrechterhalten wird, die
gegen eine Klinge reiben.
Diese Norm ist in Verbindung mit EN 3475-100 anzuwenden.
Der Hauptzweck dieser Prüfung besteht darin,
⎯ auf geregelte Weise andauernde Fehlereffekte zu erzeugen, die repräsentativ sind für solche, die im
Betrieb auftreten können, wenn ein typisches Leitungsbündel durch Abrieb beschädigt wird, so dass
sowohl zwischen den Leitungen als auch zwischen den Leitungen und der leitenden Struktur Lichtbogen
entstehen;
⎯ zu untersuchen, ob die Isolierung zur Kriechwegbildung neigt, d. h. den Lichtbogen bis zur elektrischen
Spannungsquelle auszubreiten.
Diese Prüfung, die ursprünglich für das 115-VAC-Netz festgelegt war, schlägt auch Bedingungen für das
230-VAC-Netz vor. Wenn nicht anders in der Produktnorm festgelegt, sind nur die 115-VAC-Bedinungen
einzuhalten.
Sechs prospektive Fehlerstromwerte wurden für die entsprechenden Leitungsgrößen (siehe Abschnitt 7)
festgelegt. Es ist im Allgemeinen vereinbart, dass größere Größen nicht bewertet zu werden brauchen, da der
Kurzschlusseffekt bei niedrigen Leitungsimpedanzen dominierend wird.
Falls in den technischen Normen/Produktnormen nicht anders festgelegt, sind Leitungen der Größen 002, 006
und 020 zu bewerten.
Série aérospatiale - Câbles électriques à usage aéronautique - Méthodes d'essais - Partie 604 : Résistance à l'amorçage et à la propagation d'arc électrique, essai à sec
Aeronavtika - Električni kabli za uporabo v zračnih plovilih - Preskusne metode - 604. del: Odpornost proti električnemu obloku v suhih razmerah
Ta evropski standard določa metodo za ocenjevanje obnašanja kabelske izolacije v primerih ko električni oblok ustvarjata in vzdržujeta dva kabla pod napetostjo, ki se drgneta ob list. Ta standard se mora uporabljati skupaj z EN 3475- 100. Glavni namen tega testa je: - proizvajati, na nadzorovan način, nepretrgane učinke izpada delovanja, ki so reprezentativni za učinke, do katerih lahko pride med uporabo, kadar je tipičen sveženj kablov poškodovan zaradi površinske obrabe, tako da pride do električnega obloka, tako med kabli kot med kabli in prevodno konstrukcijo; in – pregledati sposobnost izolacije za sledenje, za širjenje električnega obloka do električnega vira. Izvirno je definiran za omrežje 115 V izmeničnega toka, a ta preskus predlaga pogoje tudi za omrežje 230 V izmeničnega toka. Razen če je drugače opredeljeno v standardu za izdelke, morajo biti zadovoljeni le pogoji za 115 V izmeničnega toka. Za zadevne velikosti kablov je določenih šest ravni morebitnih okvarnih tokov (glej Klavzulo 7). Splošni dogovor je, da večjih velikosti ni potrebno ocenjevati, ker pojav kratkega stika postane prevladujoč pri nizkih impedancah voda. Razen če je drugače navedeno v tehničnem standardu /standardu za izdelek, je treba ocenjevati kable standardnih velikosti 002, 006 in 020.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 604: Lichtbogenfestigkeit, trockenSérie aérospatiale - Câbles électriques à usage aéronautique - Méthodes d'essais - Partie 604 : Résistance à l'amorçage et à la propagation d'arc électrique, essai à secAerospace series - Cables, electrical, aircraft use - Test methods - Part 604: Resistance to dry arc propagation49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 3475-604:2010SIST EN 3475-604:2010en01-oktober-2010SIST EN 3475-604:2010SLOVENSKI
STANDARDSIST EN 3475-604:20041DGRPHãþD
SIST EN 3475-604:2010
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3475-604
July 2010 ICS 49.060 Supersedes EN 3475-604:2002English Version
Aerospace series - Cables, electrical, aircraft use - Test methods - Part 604: Resistance to dry arc propagation
Série aérospatiale - Câbles électriques à usage aéronautique - Méthodes d'essais - Partie 604 : Résistance à l'amorçage et à la propagation d'arc électrique, essai à sec
Luft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 604: Lichtbogenfestigkeit, trocken This European Standard was approved by CEN on 27 February 2010.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards 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 translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3475-604:2010: ESIST EN 3475-604:2010
EN 3475-604:2010 (E) 2 Contents Page Foreword .31Scope .42Normative references .43Specimen requirements .54Preparation of specimen .55Apparatus .66Method . 107Requirements . 12 SIST EN 3475-604:2010
EN 3475-604:2010 (E) 3 Foreword This document (EN 3475-604:2010) 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 January 2011, and conflicting national standards shall be withdrawn at the latest by January 2011. 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 3475-604:2002. 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, Croatia, 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. SIST EN 3475-604:2010
EN 3475-604:2010 (E) 4 1 Scope This standard specifies a method for appraising the behaviour of cable insulation when an electric arc is initiated and maintained by two powered cables rubbing against a blade. This standard shall be used together with EN 3475-100. The primary aim of this test is: to produce, in a controlled fashion, continuous failure effects which are representative of those which may occur in service when a typical cable bundle is damaged by abrasion such that electrical arcing occurs, both between cables and between cables and conductive structure; and to examine the aptitude of the insulation to track, to propagate electric arc
to the electrical origin. Originally defined for 115 Vac network, this test also proposes conditions for 230 Vac network. Unless otherwise specified in product standard, only 115 Vac conditions shall be satisfied. Six levels of prospective fault current have been specified for concerned cable sizes (see Clause 7). It is generally agreed that larger sizes need not be assessed since the short-circuit phenomenon becomes dominant at low line impedances. Unless otherwise specified in the technical/product standard sizes 002, 006 and 020 cable shall be assessed. 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 2702:2005, Aerospace series — Aluminium alloy AL-P6061 — T6 or T62 — Drawn or extruded bar and section — a or D ≤ 200 mm EN 3197, Aerospace series — Installation of aircraft electrical and optical interconnection systems 1) 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 2)
1) Published as ASD STAN Prestandard at the date of publication of this standard. 2) Published by: Department of Defense Industrial Supply Center, ATTN: DISC-BBEE, 700 Robbins Avenue, Philadelphia, PA 19111-5096 – USA. SIST EN 3475-604:2010
EN 3475-604:2010 (E) 5 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 of 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. 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) Ensure that all cables are straight and geometrically parallel, and restrained by ties such that they are in continuous contact for at least a 75 mm continuous length around the mid point of the loom length. This is called the test zone. c) Position the ties at 15 mm to 20 mm spacing within the test zone. The tie material shall be PTFE glass lacing tape conforming to A-A-52083, type IV, finish D, size 3. d) Number the cables as shown in Figure 1 such that the cables in contact with the blade are numbers A1 and B1. Test Blade
Key 1 Original position 2 Final position A1-A2: Phase A B1-B2: Phase B C1-C2: Phase C N1-N2: Inactive cables connected to earth Figure 1 — Specimen configuration SIST EN 3475-604:2010
EN 3475-604:2010 (E) 6 5 Apparatus 5.1 Electrical equipment Connect the seven cables of the test sample within a circuit as shown in Figure 2. This circuit shall have the following requirements: a) The provision of adjustable levels of prospective fault currents for the five A, B and C cables and an electrical return path for the two N cables. b) A three phase 115/200 V 400 Hz (115 Vac network) or 230/400 V 400 Hz (230 Vac network) star (Y) connected supply shall be derived from a dedicated rotary machine capable of sustaining the maximum prospective fault current given in Table 1 for at least sufficient time for circuit protection to operate. In any case the generator shall have a sufficient rating to provide these prospective fault currents. c) 115 Vac or 230 Vac circuit breakers shall be single pole units rated at the values specified in Table 2. They shall have trip characteristics in accordance with EN 2350 or as required in the product specification. NOTE 1 Reference of circuit breakers used should be recorded. NOTE 2 In particular case, others ratings of thermal breaker protection could be employed in accordance with aircraft manufactu
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