IEC 60229-2007 Electric cables - Tests on extruded oversheaths with a special protective function《电缆.带特殊保护功能挤出外套的试验》.pdf

1、 IEC 60229Edition 3.0 2007-10INTERNATIONAL STANDARD NORME INTERNATIONALEElectric cables Tests on extruded oversheaths with a special protective function Cbles lectriques Essais sur les gaines extrieures extrudes avec fonction spciale de protection IEC60229:2007THIS PUBLICATION IS COPYRIGHT PROTECTED

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16、 Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60229Edition 3.0 2007-10INTERNATIONAL STANDARD NORME INTERNATIONALEElectric cables Tests on extruded oversheaths with a special protective function Cbles lectriques Essais sur les gaines extrieures extrudes avec fonction spciale de protection INTERNAT

17、IONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE LICS 29.060.20 PRICE CODECODE PRIXISBN 2-8318-9338-0 2 60229 IEC:2007 CONTENTS FOREWORD.3 1 Scope.5 2 Normative references .5 3 Routine tests 5 3.1 D.C. voltage test .6 3.2 Spark test6 4 Type tests 6 4.1 Abrasion test .6 4.

18、1.1 Purpose.6 4.1.2 Test procedure 6 4.1.3 Inspection8 4.1.4 Performance requirement 8 4.2 Corrosion spread (aluminium metallic screen only)8 4.2.1 General .8 4.2.2 Test procedure 8 4.2.3 Inspection9 4.2.4 Performance requirement 9 5 Electrical test after installation9 Annex A (normative) Applicatio

19、n of the abrasion test .10 Annex B (informative) Guidance on tests after installation .11 Figure 1 Abrasion test7 Table 1 Vertical force on steel angle 7 Table 2 Impulse test voltage 8 60229 IEC:2007 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRIC CABLES TESTS ON EXTRUDED OVERSHEATHS WITH A S

20、PECIAL PROTECTIVE FUNCTION FOREWORD 1) The International Electrotechnical 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 concer

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29、s. 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 this IEC Publication may be the subject of patent

30、 rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60229 has been prepared by IEC technical committee 20: Electric cables. This third edition cancels and replaces the second edition published in 1982 and constitutes a technical revisi

31、on. The significant technical changes with respect to the previous edition are as follows: The text has been modified in order to consider the function of the oversheath, irrespective of the way the metallic sheath or screen of the cable is earthed because, in some cases, the oversheath is designed

32、to act not only as a protection against corrosion, but also to reduce the risk of degradation of the cable insulation system. This requirement may be independent of the nature of the insulation and independent of the rated voltage of the cable. More precise wording has been introduced regarding the

33、application of some tests (if the sheaths or foils are bonded to the oversheath or not). The test requirements have been revised in order to be in line with the standards published after the second edition. 4 60229 IEC:2007 The pressure test at high temperature has been deleted as the requirement is

34、 specified in the relevant cable standards. A “Guidance on tests after installation” (Annex B) has been included. The text of this standard is based on the following documents: FDIS Report on voting 20/901/FDIS 20/908/RVD Full information on the voting for the approval of this standard can be found

35、in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http

36、:/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. 60229 IEC:2007 5 ELECTRIC CABLES TESTS ON EXTRUDED OVERSHEATHS WITH A SPECIAL PROTECTIVE FUNCTION 1 Scope This International St

37、andard provides a range of tests which may be required for electric cables which have an extruded oversheath and where that oversheath performs a special protective function. NOTE 1 The need for the special functions may be independent of the nature of the insulation type or independent of the rated

38、 voltage of the cable. The standard covers cables for use in insulated systems and in uninsulated systems. The tests are categorized for use as a) routine tests, b) type tests, c) tests after installation. These tests comprise: electrical routine tests on cable oversheath used in insulated or uninsu

39、lated systems, abrasion and corrosion spread type tests, electrical test on cable oversheath after installation. Routine tests and tests after installation, as specified in the relevant cable standards, are applicable for all situations. Type tests depend upon the nature of the system and the constr

40、uction of the cable and do not have to be carried out for normal conditions of use. The application of the abrasion test is given in Annex A. NOTE 2 Guidance on tests after installation is given in Annex B. 2 Normative references The following referenced documents are indispensable for the applicati

41、on 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. IEC 60230, Impulse tests on cables and their accessories IEC 62230, Electric cables Spark test method 3 Routine tests T

42、he electrical integrity of the oversheath shall be tested using either a d.c. voltage test (3.1) or a spark test (3.2). 6 60229 IEC:2007 NOTE The spark test method is not applicable when a conducting layer is already applied to the oversheath. In such cases only the test according to 3.1 may be used

43、. Testing is applicable in all cases. 3.1 D.C. voltage test A d.c. voltage of 8 kV per millimetre of the specified nominal thickness of the extruded oversheath shall be applied for 1 min between the underlying metal layer at negative polarity and the outer conducting layer, subject to a maximum volt

44、age of 25 kV. No breakdown of the oversheath shall occur during the test. NOTE The outer conducting layer may consist of a conductive layer applied to the extruded oversheath or obtained by immersion in water for the duration of the test. 3.2 Spark test A spark test according to the method given in

45、IEC 62230 shall be carried out by earthing the underlying metallic layer for an a.c. test or connecting it to the negative pole in the case of a d.c. supply. The voltages shall be 6 kV a.c. per millimetre or 9 kV d.c. per millimetre of the specified nominal thickness of the extruded oversheath, subj

46、ect to maximum values of 15 kV a.c. and 25 kV d.c., respectively. The dwell time of the cable in the region of test shall be of sufficient duration to detect any defect. No faults shall be detected during the test. 4 Type tests 4.1 Abrasion test 4.1.1 Purpose The purpose of this test is to demonstra

47、te that the extruded oversheath will withstand abrasion during the laying operation. The abrasion test shall be carried out if the oversheath material is not of type ST1, ST2, ST3 or ST7 compound and if the thickness does not comply with the particular IEC cable standard. 4.1.2 Test procedure A samp

48、le of the cable, of sufficient length, shall be submitted to the bending operation given in the bending test, as specified in the particular IEC cable standard. After bending, the procedure specified in 4.1.2.1 shall be carried out at a temperature of (20 5) C for cases a) and b), as described in An

49、nex A. This shall be followed by the electrical test in 4.1.2.2 for case a) only. 4.1.2.1 Abrasion The sample of cable shall be laid out straight and horizontal on a firm base, with the plane of the previous bending operation in the horizontal plane. In the middle of the sample and perpendicular to it, a length of mild steel angle shall be placed horizontally, at right angles to the cable, with its angle ed