SIST EN 50289-4-17:2011
(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.
NOTE Although this test method standard is written principally for communication cables, it may be used for energy cables if called up by the relevant product standard. Methods differ by the nature of the UV source.
Kommunikationskabel - Spezifikationen für Prüfverfahren - Teil 4-17: Prüfverfahren zur Beurteilung 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 proti UV-žarkom plaščev električnih in optičnih kablov
Ta evropski standard opisuje tri metode za določanje odpornosti proti UV-žarkom plaščev električnih in optičnih kablov. Ti preskusi veljajo za uporabo kablov na prostem in v zaprtih prostorih, v skladu s standardom za proizvod. Primeri plaščev so vzeti iz zaključenih kablov.
OPOMBA Čeprav je ta standard za preskusno metodo napisan predvsem za komunikacijske kable, se lahko uporablja tudi za energetske kable, če ga navaja ustrezni standard za proizvod. Metode se razlikujejo glede na naravo vira UV-žarkov
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50289-4-17:2011
01-april-2011
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PHWRGH]DYUHGQRWHQMHRGSRUQRVWLSURWL89åDUNRPSODãþHYHOHNWULþQLKLQRSWLþQLK
NDEORY
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 - Spezifikationen für Prüfverfahren - Teil 4-17: Prüfverfahren zur
Beurteilung 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 50289-4-17:2011
ICS:
33.120.10 Koaksialni kabli. Valovodi Coaxial cables. Waveguides
SIST EN 50289-4-17:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50289-4-17:2011
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SIST EN 50289-4-17:2011
EUROPEAN STANDARD
EN 50289-4-17
NORME EUROPÉENNE
February 2011
EUROPÄISCHE NORM
ICS 33.120.10
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 - Kommunikationskabel -
Spécifications des méthodes d'essais - Spezifikationen für Prüfverfahren -
Partie 4-17: Méthodes d’essai pour Teil 4-17: Prüfverfahren zur Beurteilung
évaluer la résistance aux UV des gaines der UV-Beständigkeit der Mäntel
des câbles électriques et des câbles à elektrischer und optischer Kabel
fibre optique
This European Standard was approved by CENELEC on 2011-02-01. 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 Central Secretariat 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 Central Secretariat 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50289-4-17:2011 E
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SIST EN 50289-4-17:2011
EN 50289-4-17:2011 – 2 –
Foreword
This European Standard was prepared by Joint Working Group 2 of the Technical Committee CENELEC
TC 46X, Communication cables, and the Technical Committee CENELEC TC 86A, Optical fibres and optical
fibre cables.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50289-4-17 on
2011-02-01.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2012-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-02-01
__________
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Contents
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
6 Evaluation of results . 10
7 Test report . 11
Annex A (normative) UV test apparatus with mercury vapour lamp source . 12
Annex B (informative) Recommended performance requirement . 14
Annex C (informative) Round robin test results . 15
C.1 Results obtained on EPR compound . 15
C.2 Results obtained on LLDPE . 16
C.3 Results obtained on different compounds . 17
Figures
Figure A.1 – Vapour mercury test apparatus . 12
Figure A.2 – Vapour mercury test apparatus: Details of construction . 13
Tables
Table C.1 – Average tensile strength variation in percentage. 15
Table C.2 – Average elongation variation in percentage . 15
Table C.3 – Average tensile strength variation in percentage. 16
Table C.4 – Average elongation variation in percentage . 16
Table C.5 – Average tensile strength variation in percentage. 17
Table C.6 – Average elongation variation in percentage . 17
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EN 50289-4-17:2011 – 4 –
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.
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 after exposure.
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 after exposure.
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 after exposure.
For outdoor cable application only, the test specimens are periodically subjected to water attack, for
methods A and B.
For method C, the test is made without water but the results (see Note in 4.1.3.1) indicate it is 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 EN 50289-4-17.
If used, it is recommended that such methods have at least equivalent sensitivity and detection levels as
those in this European Standard.
In case of dispute the reference source to use is the arc xenon source as described in method A.
Informative Annex C gives results obtained with round robin test done for the elaboration of the present
standard.
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.”
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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.
NOTE Although this test method standard is written principally for communication cables, it may be used for energy cables if called
up by the relevant product standard.
Methods differ by the nature of the UV source.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 60811-1-1:1995 Insulating and sheathing materials of electric and optical cables – Common test
A1:2001 methods – Part 1-1: General application – Measurement of thickness and overall
dimensions – Tests for determining the mechanical properties
(IEC 60811-1-1:1993 + A1:2001)
EN ISO 4892-1:2000 Plastics – Methods of exposure to laboratory light sources –
Part 1: General guidance (ISO 4892-1:1999)
EN ISO 4892-2:2006 Plastics – Methods of exposure to laboratory light sources –
Part 2: Xenon-arc lamps (ISO 4892-2:2006)
EN ISO 4892-3:2006 Plastics – Methods of exposure to laboratory light sources –
Part 3: Fluorescent UV lamps (ISO 4892-3:2006)
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 terms and definitions apply.
3.1
tensile strength
maximum tensile stress recorded in extending the test specimen to breaking point
3.2
elongation at break
increase of the reference length of the test specimen, expressed as the percentage of the reference length of
the unstretched test specimen, at breaking point
3.3
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
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EN 50289-4-17:2011 – 6 –
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.
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/m² ± 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;
2
• 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 given in EN ISO 4892-2:2006.
4.1.1.3 Sample and test specimen preparation
A sample, at least 600 mm long, of the finished cable or of the outer sheath removed from the finished cable.
It shall be used to prepare twelve test specimens. Test specimens shall be prepared according to
EN 60811-1-1:1995, 9.1.3.
In case, for geometrical reasons, it is not possible to use the above samples (finished cable or outer sheath),
test specimens shall be cut from a moulded plaque of the same material and colour of the cable sheath. The
thickness of the test pieces shall be (1,0 ± 0,1) mm.
4.1.1.4 Procedure
Six test specimens shall be suspended vertically so that the external surface is uniformly exposed to the
action of the actinic rays. During the test, the temperature indicated by the black-panel or the black-standard
thermometer shall remain in the range (60 ± 3) °C and the relative humidity shall remain in the range
(50 ± 5) % (only in the dry period in the case of a test for outdoor application). The rotating drum carrying the
test specimens shall turn at a speed of (1 ± 0,1) r/min.
Test specimens are cycled through periods of UV exposure, followed by periods of no radiation during which
temperature changes occur.
The periods of each cycle, total time of 120 min, are the following:
1)
• 102 min of dry UV exposure at a temperature of (60 ± 3) °C , followed by
• 18 min of rain exposure, without radiation, at a temperature of (50 ± 5) °C.
—————————
1)
Temperature indicated by the black-panel or the black-standard thermometer.
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The overall duration of the test shall be 720 h (360 cycles), unless otherwise defined in the relevant product
standard.
For coloured compounds a black panel temperature of (60 ± 3) °C shall be used.
After the exposure, the exposed test specimens shall be removed from the equipment and conditioned at
ambient temperature for at least 16 h.
The six other test specimens shall be kept at ambient temperature and protected from direct sunlight during
the UV treatment and tested at the same time as the exposed test specimens.
4.1.2 Method B: fluorescent UV lamp
4.1.2.1 General
According to EN ISO 4892-3:2006, 5.1, there are different types of fluorescent UV lamps that may be used
as laboratory light sources:
• type I lamps (commonly called UV-A lamps), with the preferred option of the UV-A 340 lamp, having a
spectral radiation that peaks at 340 nm;
• type II lamps (commonly called UV-B lamps), having a spectral radiation that peaks near the 313 nm
mercury line; these type II fluorescent UV lamps emit significant amount of radiation below 300 nm, the
nominal cut off wavelength for solar radiation, which may result in ageing processes not completely
equal to those occurring outdoors. The method using UV-B lamps is however frequently used by
agreement between the parties.
The exposure apparatus is typically constituted by a device where specimens are positioned in a flat plane in
front of an array of light sources, as per EN ISO 4892-1:2000, Figure B.2.
4.1.2.2 Apparatus
The testing appar
...
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