SIST EN 3475-605:2018
(Main)Aerospace series - Cables, electrical, aircraft use - Test methods - Part 605: Wet short circuit test
Aerospace series - Cables, electrical, aircraft use - Test methods - Part 605: Wet short circuit test
This European Standard specifies a method for appraising the behaviour of cable insulation subjected to an electric arc initiated and maintained by a contaminating fluid.
This European 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 such that electrical arcing occurs between cables;
- 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 (6) 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.
Luft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 605: Verhalten nach Kurzschluss, feucht
Diese Europäische Norm legt ein Verfahren zur Beurteilung des Verhaltens der Isolierung einer Leitung gegenüber einem elektrischen Lichtbogen fest, der durch eine Verunreinigungsflüssigkeit erzeugt und aufrechterhalten wird.
Diese Europäische 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 beschädigt und einer Verunreinigung durch eine wässrige Flüssigkeit ausgesetzt wird, so dass zwischen den Leitungen Lichtbogen entstehen, und
- zu untersuchen, ob die Isolierung zur Kriechwegbildung neigt, d. h. den Lichtbogen bis zur elektrischen Spannungsquelle auszubreiten.
Diese Prüfung, die ursprünglich für das 115-V-Wechselspannung-Netz festgelegt war, schlägt auch Bedingungen für das 230-V-Wechselspannung-Netz vor. Wenn nicht anders in der Produktnorm festgelegt, sind nur die 115-V-Wechselspannung-Bedingungen einzuhalten.
Sechs (6) voraussichtliche Fehlerstromwerte wurden für die betreffenden Leitungsgrößen (siehe Ab-schnitt 7) festgelegt. Es ist im Allgemeinen vereinbart, dass größere Größen nicht bewertet zu werden brau-chen, da der Kurzschlusseffekt bei niedrigen Leitungsimpedanzen dominierend wird.
Sofern nicht anders in den technischen Normen/Produktnormen festgelegt, sind Leitungen der Größen 002, 006 und 020 zu bewerten.
Série aérospatiale - Câbles électriques à usage aéronautique - Méthodes d'essais - Partie 605 : Essai de court-circuit humide
Aeronavtika - Električni kabli za uporabo v zračnih plovilih - Preskusne metode - 605. del: Mokri preskus kratkega stika
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 605: Verhalten nach Kurzschluss, feuchtSérie aérospatiale - Câbles électriques à usage aéronautique - Méthodes d'essais - Partie 605 : Essai de court-circuit humideAerospace series - Cables, electrical, aircraft use - Test methods - Part 605: Wet short circuit test49.060Aerospace electric equipment and systems29.060.20KabliCablesICS:Ta slovenski standard je istoveten z:EN 3475-605:2018SIST EN 3475-605:2018en,fr,de01-marec-2018SIST EN 3475-605:2018SLOVENSKI
STANDARDSIST EN 3475-605:20101DGRPHãþD
SIST EN 3475-605:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3475-605
January
t r s z ICS
v {ä r x r Supersedes EN
u v y wæ x r wã t r s rEnglish Version
Aerospace series æ Cablesá electricalá aircraft use æ Test methods æ Part
x r wã Wet short circuit test Série aérospatiale æ Câbles électriques à usage aéronautique æ Méthodes d 5essais æ Partie
x r w ã Essai de courtæcircuit humide
Luftæ und Raumfahrt æ Elektrische Leitungen für Luftfahrtverwendung æ Prüfverfahren æ Teil
x r wã Verhalten nach Kurzschlussá feucht This European Standard was approved by CEN on
t z August
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
u v y wæ x r wã t r s z ESIST EN 3475-605:2018
EN 3475-605:2018 (E) 2 Contents Page European foreword . 3 1 Scope . 4 2 Normative references . 4 3 Specimen requirements . 4 4 Preparation of specimen . 4 5 Apparatus . 6 6 Method . 8 7 Requirements . 9
SIST EN 3475-605:2018
EN 3475-605:2018 (E) 3 European foreword This document (EN 3475-605:2018) 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 July 2018 and conflicting national standards shall be withdrawn at the latest by July 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 3475-605:2010. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
SIST EN 3475-605:2018
EN 3475-605:2018 (E) 4 1 Scope This European Standard specifies a method for appraising the behaviour of cable insulation subjected to an electric arc initiated and maintained by a contaminating fluid. This European 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 such that electrical arcing occurs between cables; 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 (6) 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 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 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 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 (7) separate lengths of approximately 0,5 m consecutively from one (1) 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.
1) Published by: Department of Defense Industrial Supply Center, ATTN: DISC-BBEE, 700 Robbins Avenue, Philadelphia, PA 19111-5096 – USA. SIST EN 3475-605:2018
EN 3475-605:2018 (E) 5 4.2 Lay up the seven (7) cables as follows: a) Form the cables in a six (6) around one (1) configuration as shown in Figure 1. b) Ensure that all cables are straight and geometrically parallel, and restrained by lacing tapes such that they are in continuous contact at least within the test zone. c) Position the lacing tapes at 50 mm spacing toward the end of the specimen as shown in Figure 2. The first lacing tapes shall be at no more than 5 mm behind the dripping point. 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 direct contact with the drops 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 3475-605:2018
EN 3475-605:2018 (E) 6
Key 1 Lancing tape 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 5 Apparatus 5.1 Electrical equipment Connect the seven (7) cables of the test sample within a circuit as shown in Figure 3. This circuit shall have the following requirements: a) The provision of adjustable levels of prospective fault currents for the six (6) A, B and C
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