1、BRITISH STANDARDBS EN60172:1994+A2:2010Test procedure for the determination of the temperature index of enamelled winding wiresNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWICS 29.060.10Copyright European Committee for Electrotechnical Standardization Provided by IHS under li
2、cense with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-National ForewordThis British Standard is the UK implementation of EN 60172:1994+A2:2010. It is identical to IEC 60172:1987, incorporating amendments 1:1998 and 2:2010. It supersedes BS EN 60172:1996
3、, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee GEL/55, Winding wires.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a con
4、tract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 60172:1994+A2:2010 Issue 3, February 2010This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was publishe
5、d under the authority of the Standards Board and comes into effect on 15 March 1996 BSI 2010Amendments/corrigenda issued since publicationAmd. No. Date Text affected10229 November 1998 Implementation of IEC amendment 1:1998 with CENELEC endorsement A1:1998; Indicated by a line in the margin31 May 20
6、10 Implementation of IEC amendment 2:2010 with CENELEC endorsement A2:2010; Indicated by a double line in the margin; BSI and CEN publication dates alignedISBN 978 0 580 65851 8Summary of pagesThe following table identifies the current issue of each page. Issue 1 indicates that a page has been intro
7、duced for the first time by amendment. Subsequent issue numbers indicate an updated page. Vertical sidelining on replacement pages indicates the most recent changes (amendment, addition, deletion).Page Issue Page IssueFront cover 3 8b blankInside front cover 3 9 to 15 originala 3 16 2b blank 16a and
8、 16b 1EN title page 3 17 original2 to 3 2 18 34 to 6a 3 19 to 20 original6b blank 21 37 original 22 28 3 Inside back cover blank8a 1 Back cover 2Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking per
9、mitted without license from IHS-,-,-UDC 621.315.33 Supersedes HD 41 S3:1989 and BS EN 60172:1996ICS 29.060.10Descriptors: Electrical wire, winding, enamelled wire, thermal endurance test, temperatureEnglish versionTest procedure for the determination of the temperature index of enamelled winding wir
10、esMthode dessai pour la dtermination de lindice de temprature des fils de bobinage maillsPrfverfahren zur Bestimmung des Temperaturindex von LackdrhtenThis European Standard was approved by CENELEC on 1994-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which sti
11、pulate 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 Standar
12、d 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
13、electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.CENELECEuropean Committee for Electrotechnical Standardization Comit Europen de Normalisation
14、Electrotechnique Europisches Komitee fr Elektrotechnische NormungCentral Secretariat: rue de Stassart 35, B-1050 Brussels 1994 Copyright reserved to CENELEC membersRef. No. EN 60172:1994 EEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORMEN 60172:1994+A2February 2010Copyright European Committee for E
15、lectrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- BSI 2010Page 2 Issue 3, February 2010BS EN 60172:1994+A2:2010EN 60172:1994+A2:2010ForewordThe text of the International Standard IEC 172:1987,
16、 prepared by IEC TC 55, Winding wires, was approved by CENELEC as HD 41 S3 on 1989-08-01.This Harmonization Document was submitted to the formal vote for conversion into a European Standard and was approved by CENELEC as EN 60172 on 1994-09-01.The following date was fixed: latest date by which the E
17、N has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1995-10-15Annexes designated normative are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC.Foreword to amendment A1The text
18、 of document 55/615/FDIS, future amendment 1 to IEC 60172:1987, prepared by IEC TC 55, Winding wires, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 60172:1994 on 1998-01-01.The following dates were fixed: latest date by which the amendment has to be
19、 implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-10-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 1998-10-01Annexes designated normative are part of the body of the standard.In this
20、 standard, annexes A, B and ZA are normative.Annex ZA has been added by CENELEC.Foreword to amendment A2The text of document 55/1140/CDV, future amendment 2 to IEC 60172:1987, prepared by IEC TC 55, Winding wires, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendmen
21、t A2 to EN 60172:1994 on 2010-02-01.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 t
22、he amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2010-11-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2013-02-01Endorsement noticeThe text of amendment 2:2010 to t
23、he International Standard IEC 60172:1987 was approved by CENELEC as an amendment to the European Standard without any modification.ContentsPage1 Scope 32 Object 33 Definition of terms 44 Summary of procedure 45 Test specimens 46 Temperature exposure 67 Test voltage and its application 78 Calculation
24、s 89 Report 10Figures 11Annex A (normative) Method for calculation of the regression line 16bAnnex B (normative) Correlation coefficient 21Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications 22Copyright European Comm
25、ittee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TEST PROCEDURE FOR THE DETERMINATION OF THE TEMPERATURE INDEX OF ENAMELLED WINDING WIRES1. ScopeThis test procedure specifies, in ac
26、cordance with the provisions of IEC 60216-1, a method for evaluating the temperature index of enamelled and of tape wrapped round and rectagular wire. It does not include fibre-insulated wire or wire covered with tapes containing inorganic fibres.2. ObjectThis test procedure is to determine the temp
27、erature index of enamelled and of tape-wrapped bare or enamelled, round and rectangular wire in air at atmospheric pressure by change in electric strength. The definition of the temperature index is in accordance with IEC 60216-1. The specimen is unvarnished or varnished with an impregnating agent.
28、Testing varnished specimens will also evaluate the compatibility of the wire insulation with an impregnating agent. Thus the temperature indices of different combinations can be compared.NoteThe data obtained according to this test procedure provide the designer and development engineer with informa
29、tion for the selection of winding wire for further evaluation in insulation systems and equipment tests. BSI 2010Issue 2, November 1998 Page 3BS EN 60172:1994+A2:2010EN 60172:1994+A2:2010Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot f
30、or ResaleNo reproduction or networking permitted without license from IHS-,-,- BSI 2010Page 4 Issue 3, February 2010BS EN 60172:1994+A2:2010EN 60172:1994+A2:20103. Definition of termsTemperature indexThe temperature index is a measure of relative thermal life and is the number, which corresponds to
31、the temperature in degrees Celsius (C) derived from the thermal endurance graph at 20 000 h, as calculated by equation 6 of annex A.Specimen failure timeThe hours at the exposure temperature that have resulted in a specimen failing the proof test (see Sub-clause 8.1).Time to failureThe hours to fail
32、ure calculated from the specimen failure times for a set of specimens at one exposure temperature in accordance with Sub-clause 8.2.4. Summary of procedureA set of specimens in accordance with Clause 5 is subjected to a testing cycle. This cycle consists of a heat-storing period at a temperature giv
33、en in Clause 6, followed by a proof voltage test at room temperature in accordance with Clause 7.This cycle is repeated until a sufficient number of specimens has failed, and the time to failure is calculated in accordance with Clause 8. The test is carried out at three or more temperatures. A regre
34、ssion line is calculated in accordance with Sub-clause 8.4 and the time to failure values plotted on thermal endurance graph paper as a function of the exposure temperature.The temperature, in degrees Celsius, corresponding to the point of intersection of the regression line with the ordinate of 20
35、000 h endurance represents the Temperature Index of the winding wire under test.5. Test specimens5.1 Preparation5.1.1 Enamelled round wire with a nominal conductor diameter of 0,224 mm up to and including 2,65 mmThe grade of insulation used for determining the thermal index shall be grade 2 or grade
36、 2B for self-bonding winding wires.Wire sizes 0,315 mm and 0,28 mm are permitted for use when the specification size range is limited to 0,50 mm and finer.NOTE For round enamelled winding wires, in order to avoid undue fragility of the test specimen, experience has shown that nominal conductor diame
37、ters of 0,800 mm up to and including 2,65 mm are generally found convenient to handle and test.Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- BSI 2010Issue
38、 3, February 2010 Page 5BS EN 60172:1994+A2:2010EN 60172:1994+A2:2010TABLE IForce and number of twists for specimensNominal diameter mm Force applied to wire pairs NNumber of twists per 125 mmOver Up to and including0,224 0,25 0,85 330,25 0,35 1,7 230,35 0,50 3,4 160,50 0,75 7,0 120,75 1,05 13,5 81,
39、05 1,50 27,0 61,50 2,15 54,0 42,15 2,65 108,0 35.1.2 Tape wrapped round wire and enamelled or tape wrapped rectangular wireNote Any convenient dimension of round or rectangular wire may be used. However, for case of forming, it is recommended that the dimensions be such that small bending forces can
40、 be used to shape the pieces required to prepare the specimen. Wire with high stiffness will yield specimens with poor wire-to-wire contact areas.a) Two straight pieces of wire each of 250 mm length shall be cut from the supply spool.b) 10 mm and 15 mm of the insulation shall be removed from one end
41、 of each piece of wire to provide for electrical connection.c) Each piece shall be formed in a jig, as shown in figure 9. This produces a straight centre section of about 150 mm with bent ends, which provide the necessary flare at both ends of the final specimen.d) The two formed pieces shall be pla
42、ced together back-to-back and tightly wrapped with glass yam over the straight centre section of the specimen, as shown in figure 10.e) Prior to testing the specimen shall be proof-tested at 1 000 V a.c.Copyright European Committee for Electrotechnical Standardization Provided by IHS under license w
43、ith CENELECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- BSI 2010Page 6 Issue 3, February 2010BS EN 60172:1994+A2:2010EN 60172:1994+A2:20105.2 Varnish impregnationExperience has shown that insulated wire according to IEC 60317 and impregnating agents according t
44、o IEC 60455-3-5 or IEC 60464-3-2 can affect one another during the thermal ageing process. Interaction between wire insulation and such agent may increase or decrease the relative thermal life of this combination compared with the life of the wire tested without impregnation. Therefore, with impregn
45、ated specimens, this test procedure may give an indication of thermal endurance of a combination of wire insulation and impregnating agent.If such impregnation is required, the following procedure shall be applied:With the specimen in the vertical position, it shall be immersed in the impregnating a
46、gent for (60 10) s (see note). It shall be removed slowly and uniformly at a rate of about 1 mm/s. It shall be drained horizontally for 10 min to 15 min and cured horizontally according to the manufacturers recommendation or to an agreed schedule. If more than one treatment is to be given, immerse,
47、drain and cure the specimen vertically reversing the specimen for cach subsequent treatment.Note Some impregnation agents, such as high viscosity or thixotropic products may require alternative processing methods.5.3 Number of test specimensExperience has shown that 20 specimens without impregnation
48、 and 10 specimens with impregnation give results with an acceptable tolerance. A minimum of 10 specimens shall be used.5.4 Specimen holder5.4.1 For specimens according to 5.1.1It has been found that individual handling of the twisted specimens may introduce premature failures. It is, therefore, reco
49、mmended that the specimens be placed in a suitable holder, as shown in Figure 6. The holder should be designed in a manner that will protect the twisted specimens from external mechanical damage and warpage. The holder will be so constructed as to allow the ends of the twist to protrude from the holder to make electrical connection for the p
