SIST EN 3475-603:2011
(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 European Standard specifies a method of assessing the behaviour of cable insulation subject to an electric arc initiated and maintained by contaminating fluid along the surface of the insulation. 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 and subjected to aqueous fluid contamination. Electrical arcing occurs along the surface of the insulation between damage sites on adjacent cables; 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 agreed that sizes larger than 051 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 603: Lichtbogenfestigkeit, feucht
Diese Europäische 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 und aufrechterhalten wird.
Diese Norm sollte 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, wie sie im Betrieb auftreten können, wenn ein typisches Leitungsbündel beschädigt und einer Verunreinigung durch wässrige Flüssigkeit ausgesetzt wird. Der elektrische Lichtbogen entsteht entlang der Oberfläche der Isolierung zwischen beschädigten Stellen an benachbarten Leitungen; und
- die Eignung der Isolierung dahingehend zu untersuchen, die Fortpflanzung des elektrischen Lichtbogens zum elektrischen Ausgangspunkt zurückzuverfolgen.
Ursprünglich für ein 115 V Wechselspannung Netz festgelegt, deckt diese Prüfung auch Bedingungen für ein 230 V Wechselspannung Netz ab. Sofern nicht anders in der Produkt¬norm festgelegt, müssen nur die Bedin-gungen für das 115 V Wechselspannung Netz erfüllt werden.
Sechs prospektive Fehlerstromwerte wurden für die betroffenen Leitungsgrößen (siehe Abschnitt 7) festge-legt. Es wurde vereinbart, dass Größen, die größer als 051 sind, nicht bewertet werden, da das Kurzschluss-phänomen bei niedrigen Leitungsimpedanzen vorherrscht.
Sofern nicht anderes in der Technischen Lieferbedingung/Produktnorm festgelegt ist, sollten die Leitungs-größen 002, 006 und 020 bewertet werden.
Série aérospatiale - Câbles électriques à usage aéronautique - Méthodes d' essais - Partie 603: Résistance à l'amorcage et à la propagation d'arc èlectrique, essai humide
Aeronavtika - Električni kabli za uporabo v zračnih plovilih - Preskusne metode - 603. del: Odpornost proti električnemu obloku v vlažnih razmerah
Ta evropski standard določa metodo za ocenjevanje obnašanja kabelske izolacije, povezane z električnim oblokom, ki ga ustvarja in vzdržuje kontaminantna tekočina po površini izolacije. Ta standard se mora uporabljati skupaj z EN 3475-100. Glavni cilj tega standarda je:
- nadzorovano proizvajati nepretrgane učinke izpada delovanja, ki so reprezentativni za učinke, do katerih lahko pride, kadar je tipičen sveženj kablov poškodovan in kontaminiran z vodno tekočino. Do električnega obloka pride po površini izolacije med poškodovanimi mesti na sosednjih kablih; 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. Če ni drugače opredeljeno v standardu za proizvod, morajo biti izpolnjeni le pogoji za 115 V izmeničnega toka.
Za zadevne velikosti kablov je določenih šest ravni morebitnih okvarnih tokov (glej točko 7). Dogovor je, da velikosti, večjih od 051, ni treba ocenjevati, ker pojav kratkega stika postane prevladujoč pri nizkih impedancah voda.
Če ni drugače navedeno v tehničnem standardu/standardu za proizvod, je treba ocenjevati kable standardnih velikosti 002, 006 in 020.
General Information
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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 603: Lichtbogenfestigkeit, feuchtSérie aérospatiale - Câbles électriques à usage aéronautique - Méthodes d' essais - Partie 603: Résistance à l'amorcage et à la propagation d'arc èlectrique, essai humideAerospace series - Cables, electrical, aircraft use - Test methods - Part 603: Resistance to wet arc tracking49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 3475-603:2011SIST EN 3475-603:2011en,de01-november-2011SIST EN 3475-603:2011SLOVENSKI
STANDARDSIST EN 3475-603:20071DGRPHãþD
SIST EN 3475-603:2011
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3475-603
May 2011 ICS 49.060 Supersedes EN 3475-603:2007English Version
Aerospace series - Cables, electrical, aircraft use - Test methods - Part 603: Resistance to wet arc tracking
Série aérospatiale - Câbles électriques à usage aéronautique - Méthodes d' essais - Partie 603: Résistance à l'amorcage et à la propagation d'arc èlectrique, essai humide
Luft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 603: Lichtbogenfestigkeit, feucht This European Standard was approved by CEN on 20 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-CENELEC 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-CENELEC 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
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Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3475-603:2011: ESIST EN 3475-603:2011
EN 3475-603:2011 (E) 2 Contents Page Foreword .31Scope .42Normative references .43Specimen requirements .44Preparation of specimen .55Apparatus .66Method .97Requirements . 10 SIST EN 3475-603:2011
EN 3475-603:2011 (E) 3 Foreword This document (EN 3475-603:2011) 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 document supersedes EN 3475-603:2007. 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 November 2011, and conflicting national standards shall be withdrawn at the latest by November 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. 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 3475-603:2011
EN 3475-603:2011 (E) 4 1 Scope This European standard specifies a method of assessing the behaviour of cable insulation subject to an electric arc initiated and maintained 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, continuous 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; 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 agreed that sizes larger than 051 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 3197, Aerospace series — Design and installation of aircraft electrical and optical interconnection systems 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.
1) Published by: Department of Defense Industrial Supply Center, ATTN: DISC-BBEE, 700 Robbins Avenue, Philadelphia, PA 19111-5096 – USA. SIST EN 3475-603:2011
EN 3475-603:2011 (E) 5 4 Preparation of specimen 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. 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 or PTFE glass lacing tape (4±1,0) mm away from each outer 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) Figure 1 — 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 SIST EN 3475-603:2011
EN 3475-603:2011 (E) 6
Key 1 Test zone (10 ± 0,5) mm 2 Notch 0,5 mm to 1 mm 3 15 mm to 20 mm 4 Tape lacing 5 Drop needle Figure 2 — Test configuration 5 Apparatus 5.1 Electrical equipment Connect the seven cables of the test specimen within the circuit shown in Figure 3. This circuit shall have the following requirements: a) The provision of adjustable levels of prospective fault currents for the six A, B and C cables and an electrical return path for the N cable. b) A three phase 115/200 V 400 Hz (115 Vac network) or 230/400 V 400 Hz (230 Vac network) s
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