EN 50289-4-17:2015
(Main)Communication cables - Specifications for test methods - Part 4-17: Test methods for UV resistance evaluation of the sheath of electrical and optical fibre cable
Communication cables - Specifications for test methods - Part 4-17: Test methods for UV resistance evaluation of the sheath of electrical and optical fibre cable
This European Standard describes three methods to determine the UV resistance of sheath materials for electric and for optical fibre cables. These tests apply for outdoor and indoor cable applications according to the product standard. The samples of sheath are taken from the finished cables. Although this test method European Standard is written principally for communication cables, it may be used for energy cables if called up by the relevant product standard. Where a sheath is of cross-linked (thermosetting) material, it should be recalled that the preparation of moulded plaques must be made before crosslinking. Methods differ by the nature of the UV source. Due to the excessive time to failure, the methods described are inappropriate to products where UV resistance is conferred by ≥ 2,0 % carbon black meeting the dispersion requirements defined in EN 50290-2-24.
Kommunikationskabel - Specifikationen für Prüfverfahren - Teil 4-17: Prüfverfahren zur Ermittlung der UV-Beständigkeit der Mäntel elektrischer und optischer Kabel
Câbles de communication - Spécifications des méthodes d'essais - Partie 4-17: Méthodes d’essai pour évaluer la résistance aux UV des gaines des câbles électriques et des câbles à fibre optique
Komunikacijski kabli - Specifikacije za preskusne metode - 4-17. del: Preskusne metode za vrednotenje odpornosti plaščev električnih in optičnih kablov proti UV-žarkom
Ta evropski standard opisuje tri metode določanja odpornosti plaščev
električnih in optičnih kablov proti UV-žarkom. Ti preskusi veljajo za uporabo kablov na prostem in v prostoru glede na standard za izdelek. Vzorci plaščev so vzeti iz dokončanih kablov. Čeprav je ta preskusna metoda evropskega standarda namenjena predvsem za komunikacijske kable, se jo lahko glede na veljavni standard za izdelek uporablja tudi za energetske kable.
Če je plašč narejen iz zamreženega (duromernega) materiala, je treba opozoriti, da naj bi bila priprava
litih plošč izvedena pred zamreženjem. Metode se razlikujejo glede na vrsto vira UV-žarkov. Zaradi predolgega časa odpovedi so opisane metode neprimerne za izdelke, pri katerih je odpornost proti UV-žarkom ≥ 2,0 % saj, ki izpolnjujejo zahteve za disperzijo, opredeljene v standardu EN 50290-2-24.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2016
1DGRPHãþD
SIST EN 50289-4-17:2011
.RPXQLNDFLMVNLNDEOL6SHFLILNDFLMH]DSUHVNXVQHPHWRGHGHO 3UHVNXVQH
PHWRGH]DYUHGQRWHQMHRGSRUQRVWLSODãþHYHOHNWULþQLKLQRSWLþQLKNDEORYSURWL89
åDUNRP
Communication cables - Specifications for test methods - Part 4-17: Test methods for UV
resistance evaluation of the sheath of electrical and optical fibre cable
Kommunikationskabel - Specifikationen für Prüfverfahren - Teil.4-17: Prüfverfahren zur
Ermittlung der UV-Beständigkeit der Mäntel elektrischer und optischer Kabel
Câbles de communication - Spécifications des méthodes d'essais -- Partie 4-17:
Méthodes d’essai pour évaluer la résistance aux UV des gaines des câbles électriques
et des câbles à fibre optique
Ta slovenski standard je istoveten z: EN 50289-4-17:2015
ICS:
33.120.10 Koaksialni kabli. Valovodi Coaxial cables. Waveguides
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 50289-4-17
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2015
ICS 33.120.10 Supersedes EN 50289-4-17:2011
English Version
Communication cables - Specifications for test methods - Part 4-
17: Test methods for UV resistance evaluation of the sheath of
electrical and optical fibre cable
Câbles de communication - Spécifications des méthodes Kommunikationskabel - Specifikationen für Prüfverfahren -
d'essais - Partie 4-17: Méthodes d'essai pour évaluer la Teil 4-17: Prüfverfahren zur Ermittlung der UV-
résistance aux UV des gaines des câbles électriques et des Beständigkeit der Mäntel elektrischer und optischer Kabel
câbles à fibre optique
This European Standard was approved by CENELEC on 2015-08-31. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50289-4-17:2015 E
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test methods . 6
4.1 Test methods for outdoor application . 6
4.2 Test methods for indoor application . 9
5 Measurements . 10
5.1 Loss in mechanical properties . 10
5.2 Change in appearance . 11
5.3 Change in colour . 11
6 Evaluation of results . 11
7 Test report . 11
Annex A (informative) Example of UV test apparatus with mercury vapour lamp source . 13
Annex B (informative) Guidelines to the interpretation and use . 15
Bibliography . 18
Figures
Figure A.1 — Vapour mercury test apparatus . 13
Figure A.2 — Vapour mercury test apparatus — Details of construction . 14
Tables
Table B.1 — Excerpt from MICE table . 16
a
Table B.2 — Measurement units and conversion . 16
European foreword
This document (EN 50289-4-17:2015) has been prepared by CLC/TC 46X “Communication cables”.
The following dates are fixed:
• latest date by which this document has to be implemented at (dop) 2016-08-31
national level by publication of an identical national standard
or by endorsement
• latest date by which the national standards conflicting with this (dow) 2018-08-31
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 50289-4-17:2011.
17:2011:
Annex A has been downgraded as “informative”.
Annexes B and C have been deleted and a new Annex B has been introduced that is no longer requirements
but only a guideline to the interpretation and use.
Introduction
UV hazard assessment for synthetic compounds is possible using a number of UV sources. For the
purposes of this European Standard, three alternative methods are given.
1) Method A uses a xenon arc source to simulate the UV effect on cable sheath. The effect is measured by
the variation of mechanical characteristics and/or change in colour after exposure.
2) Method B uses a fluorescent lamp to simulate the UV effect on cable sheath. Two different lamps may
be used; type I (called UV-A lamps) and type II (called UV-B lamps). The effect is measured as for
method A, by the variation of mechanical characteristics and/or change in colour after exposure.
3) Method C uses mercury vapour lamp to simulate the UV effect on cable sheath. As for methods A
and B, the effect is determined by the variation of mechanical characteristics and/or change in colour
after exposure. This test has been typically used for telecommunication cables.
For outdoor cable application only, the test specimens are periodically subjected to water attack, for
methods A and B. A recent modification of method C now allows for a water immersion cycle.
For method C, the round robin tests made without water (see Annex B) indicate the method may be
applicable to outdoor environments.
Other sources and determination methods are capable of detecting and analysing the UV hazard for a cable
sheath. Examples of such methods are metal halide lamps or sunshine carbon arc lamps, in combination
with proper filters in order to cut off most radiation having wavelengths lower than 290 nm. Contracting
parties may agree to use such other methods, but such methods cannot claim conformity to this European
Standard. If used, it is recommended that such methods have at least equivalent sensitivity and detection
levels as those in this European Standard.
Informative Annex B gives guidelines for the use and interpretation of results.
NOTE It is important to recall the introduction to EN ISO 4892-1:2000, which says, “The relative durability of
materials in actual-use exposures can be very different depending on the location of the exposure because of differences
in UV radiation, time of wetness, temperature, pollutants and other factors. Therefore, even if results from a specific
accelerated laboratory test are found to be useful for comparing the relative durability of materials exposed in a particular
outdoor location or in particular actual-use conditions, it cannot be assumed that they will be useful for determining the
relative durability of materials exposed in a different outdoor location or in different actual-use conditions.”
1 Scope
This European Standard describes three methods to determine the UV resistance of sheath materials for
electric and for optical fibre cables. These tests apply for outdoor and indoor cable applications according to
the product standard. The samples of sheath are taken from the finished cables.
Although this test method European Standard is written principally for communication cables, it may be used
for energy cables if called up by the relevant product standard.
Where a sheath is of cross-linked (thermosetting) material, it should be recalled that the preparation of
moulded plaques should be made before crosslinking.
Methods differ by the nature of the UV source.
Due to the excessive time to failure, the methods described are inappropriate to products where UV
resistance is conferred by ≥ 2,0 % carbon black meeting the dispersion requirements defined in
EN 50290-2-24.
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 16472:2014, Plastics — Method for artificial accelerated photoageing using medium pressure mercury
vapour lamps
EN 60811-202, Electric and optical fibre cables — Test methods for non-metallic materials — Part 202:
General tests - Measurement of thickness of non-metallic sheath (IEC 60811-202)
EN 60811-501, Electric and optical fibre cables — Test methods for non-metallic materials — Part 501:
Mechanical tests — Tests for determining the mechanical properties of insulating and sheathing compounds
(IEC 60811-501)
EN ISO 4892-1:2000, Plastics — Methods of exposure to laboratory light sources — Part 1: General
guidance (ISO 4892-1:1999)
EN ISO 4892-2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc
lamps (ISO 4892-2:2013)
ISO 9370, Plastics — Instrumental determination of radiant exposure in weathering tests — General
guidance and basic test method
3 Terms and definitions
For the purposes of this document, the following term and definition applies.
3.1
median value
when several test results have been obtained and ordered in an increasing (or decreasing) succession,
middle value if the number of available value is odd, and mean of the two middle values if the number is
even
[SOURCE: EN 60811-100:2012, 3.1)
4 Test methods
4.1 Test methods for outdoor application
4.1.1 Method A: xenon arc source
4.1.1.1 General
According to EN ISO 4892-1:2000, 5.1.6.1, the xenon arc lamp, when appropriately filtered, produces
radiations with a spectral power distribution that is a good simulation of average daylight throughout the UV
and visible region.
The exposure apparatus is typically constituted by a rotating specimen holder drum, which rotates around
the light source, as per EN ISO 4892-1:2000, Figure B.1.
Apparatus having a fixed specimen holder is also permitted. In this case, it is important that air can circulate
around the sample to allow a homogeneous repartition of temperature.
4.1.1.2 Apparatus
The testing apparatus is equipped with the following lamps and filters and is set with the parameters
prescribed below:
– a ray source consisting of a xenon arc lamp (“long arc” type) equipped with borosilicate filters so that the
typical irradiance should be 43 W/m ± 15 % with a spectrum between 300 nm and 400 nm;
– a means to provide automatic control of temperature, humidity and cycles;
– a generator of deionised water with a conductivity not greater than 5 µS/cm (the pH should be
recorded); the water shall leave no observable stains or deposits and should therefore contain less than
1 ppm of solids; the rate of flow should be sufficient to guarantee that all the test specimens can be
washed;
– a means to control the irradiance to produce (43,0 ± 0,2) W/m at 340 nm (if the apparatus is not
equipped with irradiance control, follow the device manufacturer's recommendations to produce this
irradiance).
More details are gi
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.