1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 0-626-17844-4 SANS 60851-4:2006Edition 2.2IEC 60851-4:2005Edition 2.2Any reference to SABS 60851-4 is deemedto be a reference to this standard(Gover
4、nment Notice No. 1373 of 8 November 2002)SOUTH AFRICAN NATIONAL STANDARD Winding wires Test methods Part 4: Chemical properties This national standard is the identical implementation of IEC 60851-4:2005 and is adopted with the permission of the International Electrotechnical Commission. Published by
5、 Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 60851-4:2006 Edition 2.2 IEC 60851-4:2005 Edition 2.2 Table of changes Change No. Date Scope IEC amdt 1 1997
6、 Amended to change the test requirements for the resistance of enamelled wire to hydrolysis and to transformer oil. IEC amdt 2 2005 Amended to change the introductory statements and requirements for all the tests, to change the tests for resistance to hydrolysis and to transformer oil (as amended by
7、 amendment 1), and to include a figure in the solderability test. National foreword This South African standard was approved by National Committee StanSA TC 61, Rotating machinery, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS
8、 edition cancels and replaces the second SABS edition (SABS IEC 60851-4:1997). NORME INTERNATIONALE CEIIECINTERNATIONAL STANDARD 60851-4Edition 2.22005-03Fils de bobinage Mthodes dessai Partie 4: Proprits chimiques Winding wires Test methods Part 4: Chemical properties Pour prix, voir catalogue en v
9、igueur For price, see current catalogue IEC 2005 Droits de reproduction rservs Copyright - all rights reserved Aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun procd, lectronique ou mcanique, y compris la photocopie et les microfilms, s
10、ans laccord crit de lditeur. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varemb, PO Box 13
11、1, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch Q Commission Electrotechnique InternationaleInternational Electrotechnical Commission CODE PRIX PRICE CODE Edition 2:1996 consolide par les amendements 1:1997 et 2:2005 Editio
12、n 2:1996 consolidated with amendments 1:1997 and 2:2005 60851-4 IEC:1996+A1:1997+A2:2005 3 CONTENTS FOREWORD 5 INTRODUCTION 9 1 Scope11 2 Normative references.11 3 Test 12: Resistance to solvents (applicable to enamelled round wire with a nominal conductor diameter over 0,250 mm and applicable to en
13、amelled rectangular wire)11 4 Test 16: Resistance to refrigerants (applicable to enamelled round wire) 13 5 Test 17: Solderability (applicable to enamelled round wire and bunched wire).17 6 Test 20: Resistance to hydrolysis and to transformer oil (applicable to enamelled wire) 21 Figure 1 Pencil and
14、 specimen for solvent test.27 Figure 2 Refrigerant extractable test siphon cup.29 Figure 3 Condenser coils .31 Figure 4 Example of carrier for solderability test.33 Table 1 Volume of components 23 60851-4 IEC:1996+A1:1997+A2:2005 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ WINDING WIRES TEST METHO
15、DS Part 4: Chemical properties 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 co
16、ncerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). T
17、heir preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates
18、 closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the r
19、elevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that t
20、he technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maxi
21、mum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsibl
22、e for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical co
23、mmittees and IEC National Committees for any personal injury, 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 Publica
24、tions. 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 pa
25、tent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60851-4 has been prepared by IEC technical committee 55: Winding wires. This consolidated version of IEC 60851-4 is based on the second edition of IEC 60851-4 (1996) documents 55/
26、473A/FDIS and 55/514/RVD, its amendment 1 (1997) documents 55/597/FDIS and 55/614/RVD and its amendment 2 (2005) documents 55/924/FDIS and 55/937/RVD. It bears the edition number 2.2. A vertical line in the margin shows where the base publication has been modified by amendments 1 and 2. 60851-4 IEC:
27、1996+A1:1997+A2:2005 7 The committee has decided that the contents of the base publication and its amendments will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publica
28、tion will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 60851-4 IEC:1996+A1:1997+A2:2005 9 INTRODUCTION This part of IEC 60851 forms an element of a series of standards which deals with insulated wires used for windings in electrical equipment. The series has three groups des
29、cribing: a) methods of test (IEC 60851); b) specifications (IEC 60317); c) packaging (IEC 60264). 60851-4 IEC:1996+A1:1997+A2:2005 11 WINDING WIRES TEST METHODS Part 4: Chemical properties 1 Scope This part of IEC 60851 specifies the following tests: Test 12: Resistance to solvents; Test 16: Resista
30、nce to refrigerants; Test 17: Solderability; Test 20: Resistance to transformer oil. For definitions, general notes on methods of test and the complete series of methods of test for winding wires see IEC 60851-1. 2 Normative references The following referenced documents are indispensable for the app
31、lication 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 60296:1982, Specification for unused mineral insulating oils for transformers and switchgear IEC 60554-1:1977
32、, Specification for cellulosic papers for electrical purposes Part 1: Definitions and general requirements IEC 60851-1:1996, Winding wires Test methods Part 1: General IEC 60851-3:1996, Winding wires Test methods Part 3: Mechanical properties IEC 60851-5:1996, Winding wires Test methods Part 5: Elec
33、trical properties 3 Test 12: Resistance to solvents (applicable to enamelled round wire with a nominal conductor diameter over 0,250 mm and applicable to enamelled rectangular wire) The test is not suitable for round wires with a nominal conductor diameter up to and including 0,250 mm. Resistance to
34、 solvents is expressed by the pencil hardness of the wire after solvent treatment. 3.1 Equipment The following solvents shall be used: standard solvent as specified below, or solvent as agreed between purchaser and supplier. 60851-4 IEC:1996+A1:1997+A2:2005 13 The standard solvent shall be a mixture
35、 of: 60 % by volume white spirit with maximum aromatic content of 18 %; 30 % by volume xylene; 10 % by volume butanol. The pencil to be used shall be a lead pencil of a hardness as specified in the relevant standard. Before each test, the point of the pencil shall be sharpened with a smooth-cut file
36、 to form an angle of 60 symmetrical about the axis of the lead according to Figure 1. 3.2 Procedure A straight piece of wire, approximately 150 mm in length, shall be preconditioned for (10 1) min at (130 3) C in an oven with forced air circulation. A substantial length of the wire shall then be imm
37、ersed in standard solvent contained in a glass cylinder and shall be maintained therein at a temperature of (60 3) C for a period of (30 3) min. The wire shall then be removed from the solvent. The hardness of the wire surface shall then be determined in the following manner within a period of 30 s
38、after removal from the solvent. The specimen to be tested shall be laid on a smooth hard surface according to Figure 1. In the case of rectangular wires, the test shall be carried out on the largest side of the wire. The pencil shall be placed on the surface of the wire at an angle of approximately
39、(60 5) and the sharpened edge shall be pressed slowly along the surface of the wire with a force of approximately (5 0,5) N. Three tests shall be made. It shall be reported, if the coating is removed with exposure of the bare conductor. NOTE 1 This method can also be used for testing resistance to o
40、ther fluids, for example oil. NOTE 2 Where it is desired to determine the hardness of the insulation, the hardness of the lead pencil which just fails to remove the coating from the surface of the conductor shall be taken as the hardness of the wire surface, expressed by the pencil hardness. The pen
41、cil hardness series is as follows: 6B 5B 4B 3B 2B B HB H 2H 3H 4H 5H 6H 7H 8H 9H _4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 4 Test 16: Resistance to refrigerants (applicable to enamelled round wire) Resistance to refrigerant is expressed by the quantity of matter extracted from the coating of the wi
42、re and by the breakdown voltage after exposure to a refrigerant. NOTE 1 The data in this test method apply to monochlorodifluoromethane (refrigerant R 22). Other refrigerants may be used, in which case the critical data for such fluid should be observed and operation of the pressure vessel should co
43、mply with the revised test conditions. NOTE 2 Refrigerants like monochlorodifluoromethane and rinsing fluids like trichlorotrifluorethane (refrigerant R 113) are ozone depleting chemicals (ODC). Refrigerant and rinsing fluid should be agreed upon between customer and supplier. 4.1 Extraction 4.1.1 P
44、rinciple A siphon cup containing the wire sample is placed in the pressure vessel. The extractable matter is determined after exposure of the wire sample to the refrigerant under pressure and at elevated temperature. 60851-4 IEC:1996+A1:1997+A2:2005 15 4.1.2 Equipment The following equipment shall b
45、e used: siphon cup according to Figure 2, of 450 ml volume up to the siphoning level; pressure vessel of 2 000 ml volume with an internal diameter of approximately 100 mm and a pressure capacity of 200 bar (20 MPa), preferably of unwelded construction and provided with a controlled heating system; t
46、op closure of the vessel containing a condenser coil according to Figure 3; oven with forced air circulation. 4.1.3 Specimen Eight wire samples each containing (0,6 0,1) g of insulation shall be wound into coils of 70 turns. The specimens shall be degreased and conditioned in an oven with forced air
47、 circulation at (150 3) C for 15 min. After 30 min cooling, the eight specimens shall be weighed together to the nearest 0,0001 g, resulting in the total initial mass M1. 4.1.4 Procedure The eight specimens shall be placed in the siphon cup, which is suspended (25 5) mm below the condenser coil on t
48、he pressure vessel cover. The pressure vessel shall be assembled and charged with (700 25) g of distilled refrigerant free from lubricant. The condenser water supply and drain line shall be connected and the pressure vessel shall be heated by means of a controlled heating system with the temperature set to (75 5) C or a lower temperature if required to comply with the conditions of the following paragraph relating to critical pressure. The water flowing through the condenser shall be adjusted to maintain a reflux rate of 20 to 25 discharges per hour from the siphon cup. Th
