1、 IEC 61394 Edition 1.0 2011-10 INTERNATIONAL STANDARD Overhead lines Requirements for greases for aluminium, aluminium alloy and steel bare conductors IEC 61394:2011(E) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2011 IEC, Geneva, Switzerland All rights reserved. Unless otherwise
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9、quirements for greases for aluminium, aluminium alloy and steel bare conductors INTERNATIONAL ELECTROTECHNICAL COMMISSION R ICS 29.060.20; 29.240.20 PRICE CODE ISBN 978-2-88912-706-1 Registered trademark of the International Electrotechnical Commission colour inside 2 61394 IEC:2011(E) CONTENTS FORE
10、WORD . 3 1 Scope . 5 2 Normative references . 5 3 Designation system 5 4 Requirements for grease 6 5 Tests 6 5.1 Classification of tests 6 5.1.1 Type tests . 6 5.1.2 Sample tests . 6 5.2 Preconditioning of samples . 6 5.2.1 Type A products 6 5.2.2 Type B products 6 5.2.3 Products taken from a conduc
11、tor . 6 5.3 Drop point . 7 5.4 High temperature stability (Type A products only) 7 5.5 Penetrability test . 7 5.6 Low-temperature adherence 7 5.7 Acidity/alkalinity (type B grease only) 7 5.8 Ageing . 8 5.8.1 Preconditioning 8 5.9 Corrosion tests 8 5.10 Stability of grease on conductor at high tempe
12、rature . 8 5.11 Stability of grease on conductor under short-circuit . 9 Annex A (normative) Acidity or alkalinity test method for type B grease . 11 Annex B (normative) Sample preparation and test procedure for ageing test 13 Annex C (normative) Stability of grease on conductor at high temperature
13、. 16 Annex D (normative) Stability of grease complete conductor under short-circuit . 17 Bibliography 18 Figure 1 Corrosion coupons . 10 Figure B.1 Coupon for type A grease . 13 Figure B.2 Coupon for type B grease . 14 Table 1 Classification of tests 6 Table A.1 Acidity or alkalinity index formula .
14、 12 61394 IEC:2011(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OVERHEAD LINES REQUIREMENTS FOR GREASES FOR ALUMINIUM, ALUMINIUM ALLOY AND STEEL BARE CONDUCTORS FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national
15、 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. To this end and in addition to other activities, IEC publishes International Standards, Technical Sp
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23、jury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references
24、 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 rights. IEC shall not be held responsible for ident
25、ifying any or all such patent rights. International Standard IEC 61394 has been prepared by IEC technical committee 7: Overhead electrical conductors. This first edition of IEC 61394 cancels and replaces the first edition of technical specification IEC/TS 61394 published in 1997. It constitutes a te
26、chnical revision and now has the status of an International Standard. The text of this standard is based on the following documents: FDIS Report on voting 7/609/FDIS 7/613/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above
27、 table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 4 61394 IEC:2011(E) The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data rela
28、ted to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct unders
29、tanding of its contents. Users should therefore print this document using a colour printer. A bilingual version of this publication may be issued at a later date. 61394 IEC:2011(E) 5 OVERHEAD LINES REQUIREMENTS FOR GREASES FOR ALUMINIUM, ALUMINIUM ALLOY AND STEEL BARE CONDUCTORS 1 Scope This Interna
30、tional Standard specifies the requirements and tests of greases designed for corrosion protection of bare overhead conductors. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For u
31、ndated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-2-11:1981, Basic environmental testing procedures Part 2-11: Tests Test Ka: Salt mist lSO 2137:2007, Petroleum products and lubricants Determination of cone penetration of lubricating greas
32、es and petrolatum ISO 2176:1995, Petroleum products Lubricating grease Determination of dropping point 3 Designation system Greases shall be designated 1 A 2or 1 B 2where A and B define the type of grease as follows: type A: products generally applied in the cold state, for example greases: semi-sol
33、id or solid products consisting essentially of a stabilized mixture of mineral or synthetic oil and thickeners such as metal soaps or inorganic compounds; type B: products generally applied in the hot state, for example petrolatum: semi-solid, or solid products made up essentially of microcrystallin
34、e waxes associated with small quantities of mineral oil and organic additives; 1is the lowest temperature in C below 0 C at which the grease will perform the requirement of protection of the conductor from atmospheric corrosion; 2is the highest temperature, in C, at which the grease will perform to
35、this requirement (achieve specified drop point or high temperature stability). Examples: 20A150 type A grease with a temperature 1of -20 C and 2of 150 C. 20B110 type B grease with a temperature 1of -20 C and 2of 110 C. The grease supplier shall provide a unique identifier for its grease, and shall r
36、etain details of its composition for future reference. The composition shall include manufacturing tolerance and shall remain unchanged while the grease is marketed under this specific identifier. 6 61394 IEC:2011(E) 4 Requirements for grease The grease shall protect overhead bare conductors from at
37、mospheric corrosion in service and in storage. The grease shall remain in the conductor for the specified conditions of operation. The grease shall meet the requirements as described in this standard. 5 Tests 5.1 Classification of tests 5.1.1 Type tests Type tests are intended to verify the main cha
38、racteristics of a grease which depend mainly on its composition. They are carried out once for a suppliers specific product and then subsequently repeated when the composition of the grease has changed. 5.1.2 Sample tests Sample tests are intended to guarantee the quality of the grease and complianc
39、e with the requirements of this standard. Table 1 Classification of tests Test Type tests Sample tests Type A Type B Type A Type B Drop point X X X X High temperature stability X X Penetrability X X X X Low temperature adherence X X Acidity/alkalinity X Ageing X X Stability on conductor a a Stabilit
40、y on conductor (short-circuit) a a a If requested by the purchaser. 5.2 Preconditioning of samples 5.2.1 Type A products Type A grease delivered with an excess of oil on the surface shall not be acceptable. Excess oil on the surface of the product after storage shall be removed. If necessary, the pr
41、oduct shall be mixed prior to carrying out the measurements. 5.2.2 Type B products The product shall be heated between 10 C to 20 C above the temperature at which melting occurs, and maintained at this temperature for 30 min. The quantity necessary for carrying out the tests shall be poured into the
42、 test containers and allowed to cool at ambient temperature for a period of at least 24 h. 5.2.3 Products taken from a conductor When the product to be tested is taken from a conductor, no preconditioning is allowed. 61394 IEC:2011(E) 7 5.3 Drop point 5.3.1 The determination of the drop point shall
43、be made using the method given in ISO 2176. 5.3.2 When tested in accordance with 5.3.1, the minimum value of 5 determinations shall be greater than or equal to 2 . Type A products may not have a well defined drop point, in which case the tests shall be stopped when the temperature reaches ( 2 + 20)
44、C. 5.4 High temperature stability (Type A products only) 5.4.1 The oil separation shall be determined using the method given in IP 121, after 1 h at a temperature of 2 . 5.4.2 When tested in accordance with 5.4.1, the maximum quantity of oil separated shall not exceed 0,2 % by mass. 5.5 Penetrabilit
45、y test 5.5.1 A sample of grease shall be tested using the method given in ISO 2137, using a full scale cone, at a temperature of 25 C. 5.5.1.1 Type A products When the type A product is tested in accordance with 5.5.1, the mean value obtained for a type test shall be greater than or equal to 70 unit
46、s 0,1 mm. Results obtained from sample tests shall not vary from the value obtained from the type test by more than 20 %. 5.5.1.2 Type B products When the type B product is tested in accordance with 5.5.1, the value obtained for a type test shall be between 120 and 180 0,1 mm. Results obtained from
47、sample tests shall not vary from the value obtained from the type test by more than 20 %. 5.6 Low-temperature adherence 5.6.1 An aluminium coupon measuring 100 mm 100 mm (1 0,1) mm shall be coated with a (0,50 0,05) mm thick film of the product on one side and then maintained, along with a 25 mm man
48、drel, at a temperature less or equal to 1for 1 h. 5.6.2 The coupon with the coated side outside of the mandrel shall then be immediately bent to an angle between 100 and 120 around the mandrel. The folding time of the coupon is 5 s. 5.6.3 When tested in accordance with 5.6.1 and 5.6.2, the product s
49、hall remain adhering to the coupon with no evidence of cracking or flaking when examined by the naked eye or with normal corrective lenses. 5.7 Acidity/alkalinity (type B grease only) 5.7.1 The test set-up and method is described in Annex A. 5.7.2 When tested in accordance with 5.7.1, the acidity or alkalinity of the sample before ageing shall be less than or equal to 2,0. 8 61394 IEC:2011(E) 5.8 Ageing 5.8.1
