1、 IEC 60794-5-20Edition 1.0 2014-02INTERNATIONAL STANDARD Optical fibre cables Part 5-20: Family specification Outdoor microduct fibre units, microducts and protected microducts for installation by blowing IEC 60794-5-20:2014-02(en) colourinsideTHIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2014 I
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11、Part 5-20: Family specification Outdoor microduct fibre units, microducts and protected microducts for installation by blowing INTERNATIONAL ELECTROTECHNICAL COMMISSION V ICS 33.180.01, 33.180.10 PRICE CODE ISBN 978-2-8322-1420-6 Registered trademark of the International Electrotechnical Commission
12、Warning! Make sure that you obtained this publication from an authorized distributor. colourinside 2 60794-5-20 IEC:2014(E) CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references 6 3 Symbols 7 4 General requirements 8 4.1 Construction . 8 4.1.1 General . 8 4.1.2 Microduct fibre units 9 4.1.3 Microdu
13、cts . 9 4.1.4 Protected microducts . 9 4.1.5 Microduct fittings . 9 4.1.6 Microduct hardware . 10 4.2 Optical fibres 10 4.3 Installation performance tests . 10 4.3.1 Installation conditions 10 4.3.2 Tests applicable 11 4.3.3 Mechanical and environmental tests 11 5 Microduct fibre unit 11 5.1 Tests a
14、pplicable 11 5.2 Family requirements and test conditions for microduct fibre unit tests 12 5.3 Tensile performance . 12 5.4 Crush 12 5.5 Repeated bending . 13 5.6 Torsion . 13 5.7 Kink 13 5.8 Bend . 13 5.9 Temperature cycling . 13 5.10 Ageing 14 5.11 Water immersion . 14 5.12 Buffer removal 14 6 Mic
15、roduct 14 6.1 Tests applicable 14 6.2 Tensile performance . 15 6.3 Crush 15 6.4 Impact 16 6.5 Repeated bending . 16 6.6 Torsion . 16 6.7 Kink 16 6.8 Bend . 16 6.9 Microduct route verification test 17 6.10 Microduct pressure withstand 17 6.11 Ageing 17 7 Protected microducts . 17 7.1 Tests applicable
16、 17 7.2 Tensile performance . 18 7.3 Crush 18 60794-5-20 IEC:2014(E) 3 7.4 Impact 19 7.5 Repeated bending . 19 7.6 Kink 19 7.7 Bend . 19 7.8 Microduct route verification test 19 7.9 Microduct pressure withstand 20 7.10 Ageing 20 Annex A (informative) Examples of microduct fibre units, microducts, an
17、d protected microducts . 21 Annex B (informative) Product descriptions (blank detail specification and minimum requirements) 22 Annex C (normative) Product constructions . 25 Annex D (normative) Transmission requirements . 28 D.1 Attenuation of cabled fibre 28 D.2 Fibre bandwidth requirements . 29 A
18、nnex E (normative) IEC 60794-1-21 Method Exx Microduct inner clearance test . 30 E.1 Object . 30 E.2 General . 30 E.3 Sample . 30 E.4 Test equipment . 30 E.5 Procedure . 30 E.6 Requirements . 30 E.7 Details to be recorded . 31 Figure A.1 Protected microducts, tight package . 21 Figure A.2 Microduct
19、fibre units . 21 Table 1 Tests applicable for installation performance . 11 Table 2 Tests applicable for mechanical and environmental performance of microduct fibre unit . 11 Table 3 Tests applicable for mechanical and environmental performance of microduct 15 Table 4 Tests applicable for mechanical
20、 and environmental performance of protected microduct 18 Table B.1 Microduct fibre unit description 22 Table B.2 Microduct description . 23 Table B.3 Protected microduct description . 24 Table C.1 Typical microduct fibre unit construction 25 Table C.2 Microduct construction . 26 Table C.3 Protected
21、microduct construction . 27 Table D.1 Multimode maximum cable attenuation coefficient (dB/km) 28 Table D.2 Single-mode maximum cable attenuation coefficient (dB/km) Premises cabling applications 28 Table D.3 Single-mode maximum cable attenuation coefficient (dB/km) All other applications 29 Table D.
22、4 Minimum multimode fibre bandwidth (MHzkm) . 29 4 60794-5-20 IEC:2014(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRE CABLES Part 5-20: Family specification Outdoor microduct fibre units, microducts and protected microducts for installation by blowing FOREWORD 1) The International Elec
23、trotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields.
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32、his IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of t
33、his IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60794-5-20 has been prepared by subcommittee 86A: Fibres and cables,of IEC technical committee 86: Fibre optics. The text of this stand
34、ard is based on the following documents: CDV Report on voting 86A/1497/CDV 86A/1543/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Par
35、t 2. 60794-5-20 IEC:2014(E) 5 A list of all parts of IEC 60794 series, published under the general title Optical fibre cables, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site
36、 under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour inside logo on the cove
37、r page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 6 60794-5-20 IEC:2014(E) OPTICAL FIBRE CABLES Part 5-20: Family specification Outdoor micr
38、oduct fibre units, microducts and protected microducts for installation by blowing 1 Scope This part of IEC 60794 is a family specification that covers outdoor microduct fibre units and corresponding microducts and protected microducts for installation by blowing. The protected microducts are intend
39、ed for duct, directly buried or lashed applications. Microduct fibre units differ from microduct optical fibre cables (see IEC 60794-5-10) in that they provide less protection to the fibres that they contain. Specifically, microduct fibre units rely on the structure of the microduct, protected micro
40、duct or appropriate housing to support installation and to provide additional mechanical protection for the optical fibre over the lifetime of the product. Systems built with components covered by this standard are subject to the requirements of sectional specification IEC 60794-5 where applicable.
41、Annex A gives examples of microduct optical fibre units and microducts. Annex B describes a blank detail specification for outdoor microduct fibre units and the associated microducts and incorporates some minimum requirements. Detail product specifications may be prepared on the basis of this family
42、 specification using Annex B as a guide. Annex C provides normative product constructions for microduct optical fibre units, microducts and protected microducts. The parameters specified in this standard may be affected by measurement uncertainty arising either from measurement errors or calibration
43、 errors due to lack of suitable standards. Acceptance criteria should be interpreted with respect to this consideration. The number of fibres tested is intended to be representative of the microduct fibre unit design and should be agreed between the customer and supplier. 2 Normative references The
44、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. IEC 60304,
45、Standard colours for insulation for low-frequency cables and wires IEC 60793-1-40, Optical fibres Part 1-40: Measurement methods and test procedures Attenuation IEC 60793-1-53, Optical fibres Part 1-53: Measurement methods and test procedures Water immersion IEC 60793-2-10, Optical fibres Part 2-10:
46、 Product specifications Sectional specification for category A1 multimode fibres 60794-5-20 IEC:2014(E) 7 IEC 60793-2-50, Optical fibres Part 2-50: Products specification Sectional specification for class B single-mode fibres IEC 60794-1-1, Optical fibre cables Part 1-1: Generic specification Genera
47、l IEC 60794-1-2, Optical fibre cables Part 1-2: Generic specification Basic optical cable test procedures IEC 60794-1-21, Optical fibre cables Part 1-21: Generic specification Basic optical cable test procedures Mechanical test methods IEC 60794-1-22, Optical fibre cables Part 1-22: Generic specific
48、aiton Basic optical cable test procedures Environmental test methods IEC 60794-3:2001, Optical fibre cables Part 3: Sectional specification Outdoor cables IEC 60794-5, Optical fibre cables Part 5: Sectional specification Microduct cabling for installation by blowing IEC 60794-5-10, Optical fibre cab
49、les Part 5-10: Family specification Outdoor microduct optical fibre cables, microducts and protected microducts for installation by blowing IEC 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 60811-203, Electric and optical fibre cables Test methods for non-metallic materials Part 203: General tests
