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
- Status
- Published
- Publication Date
- 09-Jan-2018
- Withdrawal Date
- 30-Jul-2018
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 2/S 2 - Cables & Stripping Tools
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 10-Jan-2018
- Completion Date
- 10-Jan-2018
Relations
- Effective Date
- 08-Jun-2022
- Effective Date
- 31-Jan-2018
- Effective Date
- 09-Jul-2024
Overview
EN 3475-603:2018 - Aerospace series - Cables, electrical, aircraft use - Test methods - Part 603: Resistance to wet arc tracking - is a European test standard published by CEN for assessing how aircraft cable insulation behaves when an electric arc is initiated and sustained by a contaminating aqueous fluid on the insulation surface. The test reproduces realistic failure modes (arc-tracking between damaged adjacent conductors) and evaluates the insulation’s aptitude to track and propagate an arc back to the electrical origin. EN 3475-603:2018 is to be used together with EN 3475-100.
Key topics and requirements
- Purpose: Produce controlled, continuous failure effects representative of in-service fluid-contaminated damage and determine tracking/propagation behaviour.
- Test configuration: Seven cable lengths (approx. 0.5 m) assembled in a 6-around-1 bundle. Two cables are circumferentially notched (0.5–1.0 mm width) and displaced to form a test zone with (10 ± 0.5) mm of undamaged insulation between damage sites.
- Electrolyte & delivery: Sodium chloride solution (3 ± 0.5 % by weight) dripped at (100 ± 10) mg/min from an 18-gauge needle (approx. 6–10 drops/min) onto the test zone.
- Electrical supply: 400 Hz 3‑phase star (Y) supply - normally 115/200 V (115 Vac network) with alternative conditions for 230/400 V (230 Vac network). Unless product standards specify otherwise, 115 Vac conditions apply.
- Prospective fault currents: Six fault-current levels are defined per cable size (see standard tables). Typical cable sizes required for qualification: 002, 006 and 020; sizes larger than 051 need not be assessed.
- Test duration & replication: Tests run for up to 8 hours or until automatic shutdown (circuit breaker trip/extinction). For each fault-current level three specimens are tested (typically 18 specimens per size).
- Safety & instrumentation: Transparent protective enclosure, automatic shutdown on open circuit, video recording required, and appropriate instrumentation to monitor currents and circuit breaker operation.
- Assessment & reporting: Visual damage, char/tracking lengths, continuity checks, and, where required (115 Vac), post-test voltage proof (EN 3475-302). Test report must record cable identity, source, power characteristics, circuit breaker identity and observed damage. Pass/fail criteria are defined in the applicable product specification.
Applications and users
- Aerospace cable designers and manufacturers validating cable insulation resistance to wet arc tracking
- Aircraft OEMs and systems engineers specifying wiring harness performance in fluid-contaminated environments
- Independent test laboratories performing qualification and acceptance tests
- Certification bodies and maintenance/airworthiness organizations assessing wiring safety and failure modes
Related standards
- EN 3475-100 (General test methods)
- EN 3475-302 (Voltage proof / immersion test)
- EN 3197 (Design and installation guidance - useful for failure differentiation)
- EN 2350 (Circuit breaker specifications)
- A‑A‑52083 (PTFE glass lacing tape specification)
Keywords: EN 3475-603:2018, wet arc tracking, aerospace cable testing, cable insulation tracking resistance, electrical arc tracking, 115 Vac aircraft wiring.
Frequently Asked Questions
EN 3475-603:2018 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Cables, electrical, aircraft use - Test methods - Part 603: Resistance to wet arc tracking". This standard covers: 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.
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.
EN 3475-603:2018 is classified under the following ICS (International Classification for Standards) categories: 49.060 - Aerospace electric equipment and systems. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 3475-603:2018 has the following relationships with other standards: It is inter standard links to EN 3475-603:2011, EN 3475-603:2011/AC:2011, prEN 3475-603. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3475-603:2018 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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
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
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
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
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
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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