SIST EN 3475-603:2018
(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 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.
Luft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 603: Lichtbogenfestigkeit, feucht
Série aérospatiale - Câbles électriques à usage aéronautique - Méthodes d’essais - Partie 603: Résistance à l’amorçage et à la propagation d’arc électrique, essai humide
Aeronavtika - Električni kabli za uporabo v letalih - Preskusne metode - 603. del: Ugotavljanje odpornosti proti obloku v vlažnih razmerah
Ta evropski standard določa metodo za ocenjevanje vedenja kabelske izolacije, za katero velja električni oblok, ki se sproži in vzdržuje s kontaminacijo tekočine vzdolž površine izolacije.
Ta standard se mora uporabljati skupaj s standardom EN 3475-100.
Primarni namen tega preskusa je:
na nadzorovan način poustvariti vplive ponavljajočih se napak, reprezentativne tistim, ki se lahko pojavijo pri uporabi običajnega kabelskega sklopa, ki je poškodovan in izpostavljen kontaminacijski tekočini. Na površini izolacije med poškodovanimi mesti sosednjih kablov pride do električnega obloka; in
preučiti amptitudo izolacije za sledenje električnega obloka do njegovega izvora.
Ta preskus, izvirno določen za omrežje 115 V AC, predlaga tudi pogoje za omrežje 230 V AC. Razen če je v standardu za izdelek določeno drugače, je treba izpolniti le pogoje za 115 V AC.
Za zadevne velikosti kablov je bilo določenih šest ravni pričakovanega okvarnega toka (glej točko 7). Dogovorjeno je, da velikosti, večje od 051 ni treba ocenjevati, ker pojav kratkega stika postane dominanten pri nizkih uporih.
Razen če je v tehničnem standardu/standardu za proizvod določeno drugače, je treba ocenjevati velikosti kablov 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 603: Lichtbogenfestigkeit, feuchtSérie aérospatiale - Câbles électriques à usage aéronautique - Méthodes d’essais - Partie 603: Résistance à l’amorçage et à la propagation d’arc électrique, essai humideAerospace series - Cables, electrical, aircraft use - Test methods - Part 603: Resistance to wet arc tracking49.060Aerospace electric equipment and systems29.060.20KabliCablesICS:Ta slovenski standard je istoveten z:EN 3475-603:2018SIST EN 3475-603:2018en,fr,de01-april-2018SIST EN 3475-603:2018SLOVENSKI
STANDARDSIST EN 3475-603:2011/AC:2012SIST EN 3475-603:20111DGRPHãþD
SIST EN 3475-603:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3475-603
January
t r s z ICS
v {ä r x r Supersedes EN
u v y wæ x r uã t r s sEnglish Version
Aerospace series æ Cablesá electricalá aircraft use æ Test methods æ Part
x r uã Resistance to wet arc tracking Série aérospatiale æ Câbles électriques à usage aéronautique æ Méthodes d 5essais æ Partie
x r uã Résistance à l 5amorçage et à la propagation d 5arc électriqueá essai humide
Luftæ und Raumfahrt æ Elektrische Leitungen für Luftfahrtverwendung æ Prüfverfahren æ Teil
x r uã Lichtbogenfestigkeitá 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 uã t r s z ESIST EN 3475-603:2018
EN 3475-603:2018 (E) 2 Contents Page European foreword . 3 1 Scope . 4 2 Normative references . 4 3 Specimen requirements . 4 4 Preparation of specimen . 5 5 Apparatus . 6 6 Method . 9 7 Requirements . 10
SIST EN 3475-603:2018
EN 3475-603:2018 (E) 3 European foreword This document (EN 3475-603:2018) 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 3475-603:2011. 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 3475-603:2018
EN 3475-603:2018 (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 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. Electrical arcing occurs along the surface of the insulation between damage sites on adjacent 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 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 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 EN 3475-302, Aerospace series — Cable, 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 3475-603:2018
EN 3475-603:2018 (E) 5 4 Preparation of specimen Cut seven (7) separate lengths approximately 0,5 m consecutively from one (1) 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 (2) 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 (7) cables as follows: a) Form the cables in a six (6) around one (1) 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 lacing tapes such that they are in continuous contact within the test zone. d) Position the lacing tapes (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 SIST EN 3475-603:2018
EN 3475-603:2018 (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 Lacing tape 5 Drop needle Figure 2 — Test configuration 5 Apparatus 5.1 Electrical equipment Connect the seven (7) 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 (6) A, B and C cables and an electrical return path for the N cable. b) A three (3) 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 (115 Vac network) or Table 2 (230 Vac network) for at least sufficient time for the circuit protect
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