EN 3475-603:2002
(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 standard specifies a method for appraising the behaviour of cable insulation subjected to an electric arc initiated by a contaminating fluid.
This standard shall be used together with EN 3475-100.
The primary aim of this test is to produce, in a controlled fashion, 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, both between cables and between cables and conductive structure.
Six levels of prospective fault current have been specified for cable sizes 26 to 10.
Individual product standards shall require at least sizes 24, 20, 14 cable to be assessed.
Luft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 603: Lichtbogenfestigkeit, feucht
Diese Norm legt ein Verfahren zur Beurteilung des Verhaltens der Isolierung einer Leitung gegenüber einem elek-trischen Lichtbogen fest, der durch eine Verunreinigungsflüssigkeit erzeugt wird.
Diese Norm ist in Verbindung mit EN 3475-100 anzuwenden.
Der Hauptzweck dieser Prüfung besteht darin, auf geregelte Weise Fehlereffekte zu erzeugen, die repräsentativ sind für solche, die im Betrieb auftreten können, wenn ein typisches Leitungsbündel beschädigt und einer Verunreinigung durch wässrige Flüssigkeit ausgesetzt wird, so dass sowohl zwischen den Leitungen als auch zwischen den Leitungen und der leitenden Struktur Lichtbogen entstehen.
Sechs prospektive Fehlerstromwerte wurden für die Leitungsgrößen 26 bis 10 festgelegt.
In den einzelnen Produktnormen muss zumindest die Prüfung der Leitungsgrößen 24, 20 und 14 vorgeschrieben werden.
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
Aerospace series - Cables, electrical, aircraft use - Test methods - Part 603: Resistance to wet arc tracking
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 3475-603:2004
01-maj-2004
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
Luft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren -
Teil 603: Lichtbogenfestigkeit, feucht
Série aérospatiale - Câbles électriques a usage aéronautique - Méthodes d'essais -
Partie 603: Résistance a l'amorçage et a la propagation d'arc électrique, essai humide
Ta slovenski standard je istoveten z: EN 3475-603:2002
ICS:
49.060 /HWDOVNDLQYHVROMVND Aerospace electric
HOHNWULþQDRSUHPDLQVLVWHPL equipment and systems
SIST EN 3475-603:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 3475-603:2004
---------------------- Page: 2 ----------------------
SIST EN 3475-603:2004
EUROPEAN STANDARD
EN 3475-603
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2002
ICS 49.060
English version
Aerospace series - Cables, electrical, aircraft use - Test
methods - Part 603: Resistance to wet arc tracking
Série aérospatiale - Câbles électriques à usage Luft- und Raumfahrt - Elektrischen Leitungen für Luftfahrt
aéronautique - Méthodes d'essais - Partie 603: Résistance Verwendung - Prüfverfahren - Teil 603:
à l'amorçage et à la propagation d'arc électrique, essai Lichtbogenfestigkeit, feucht
humide
This European Standard was approved by CEN on 25 January 2002.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3475-603:2002 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 3475-603:2004
EN 3475-603:2002 (E)
Foreword
This document (EN 3475-603:2002) has been prepared by the European Association of Aerospace
Manufacturers (AECMA).
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
AECMA, 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 December 2002, and conflicting national standards shall be
withdrawn at the latest by December 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, Czech Republic, Denmark,
Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and the United Kingdom
2
---------------------- Page: 4 ----------------------
SIST EN 3475-603:2004
EN 3475-603:2002 (E)
1 Scope
This standard specifies a method for appraising the behaviour of cable insulation subjected to an electric arc
initiated by a contaminating fluid.
This standard shall be used together with EN 3475-100.
The primary aim of this test is to produce, in a controlled fashion, 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, both between cables and between cables and conductive
structure.
Six levels of prospective fault current have been specified for cable sizes 26 to 10.
Individual product standards shall require at least sizes 24, 20, 14 cable to be assessed.
2 Normative references
This European Standard incorporates by dated or undated reference provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to
this European Standard only when incorporated in it by amendment or revision. For undated references the
latest edition of the publication referred to applies.
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
EN 2350 Aerospace series – Circuit breakers – Technical specification
1)
MIL-T-43435-B Specification for tape lacing and tying
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 fluid.
Damage two of the lengths of 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.
1) Published by: Department of Defense (DOD), The Pentagon, Washington D.C. 20301 USA.
3
---------------------- Page: 5 ----------------------
SIST EN 3475-603:2004
EN 3475-603:2002 (E)
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) Displace the damaged cables longitudinally such that a separation of (10 – 0,5) mm of undamaged
insulation is provided. This is called the test zone.
c) Ensure that all cables are straight and geometrically parallel, and restrained by ties such that they are
in continuous contact at least within the test zone.
d) Position the ties (4 – 1,0) mm away from each side of the test zone and then at 15 mm to 20 mm
spacing toward the ends of the specimen as shown in figure 2.
NOTE The tie material shall be PTFE glass lacing tape conforming to MIL-T-43435-B type IV, finish D size 3.
e) Number the cables as shown in figure 1 such that the faulted cables are numbers A1 and B1 and the
centre cable is number N. Cables C1, A2, B2 and C2 are grouped around N.
Drop needle
A1-A2 : phase A
B1-B2 : phase B
(10 – 2) mm
C1-C2 : phase C
N :Neutral cable
A1 B1
connected to earth
C2 N C1
B2 A2
Figure 1 – Specimen configuration
4
---------------------- Page: 6 ----------------------
SIST EN 3475-603:2004
EN 3475-603:2002 (E)
(10 – 0,5) mm
(4 – 1) mm
Test zone
Notch
0,5 mm to 1 mm
15 mm to 20mm
15 mm to 20mm
Tape lacing
Drop needle
Figure 2 – Test configuration
5 Apparatus
5.1 Electrical equipment
Connect the seven 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 A, B and C cables and an
electrical return path for the N cable.
b) A three phase 208/115 V 400 Hz 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 prot
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.