1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationWinding wires Test methodsPart 6: Thermal propertiesBS EN 60851-6:2012National forewordThis British Standard is the UK implementation of EN 60851-6:2012. It isidentical to IEC 60
2、851-6:2012. It supersedes BS EN 60851-6:1998 which iswithdrawn.The UK participation in its preparation was entrusted to Technical CommitteeGEL/55, Winding wires.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to inclu
3、de all the necessary provisions of acontract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 75473 9ICS 29.060.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This Britis
4、h Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 August 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60851-6:2012EUROPEAN STANDARD EN 60851-6 NORME EUROPENNE EUROPISCHE NORM August 2012 CENELEC European Commi
5、ttee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC memb
6、ers. Ref. No. EN 60851-6:2012 E ICS 29.060.10 Supersedes EN 60851-6:1996 + A1:1997 + A2:2004English version Winding wires - Test methods - Part 6: Thermal properties (IEC 60851-6:2012) Fils de bobinage - Mthodes dessai - Partie 6: Proprits thermiques (CEI 60851-6:2012) Wickeldrhte - Prfverfahren - T
7、eil 6: Thermische Eigenschaften (IEC 60851-6:2012) This European Standard was approved by CENELEC on 2012-06-27. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without an
8、y alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other la
9、nguage made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, t
10、he Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the Uni
11、ted Kingdom. BS EN 60851-6:2012EN 60851-6:2012 - 2 - Foreword The text of document 55/1312/FDIS, future edition 3 of IEC 60851-6, prepared by IEC/TC 55 “Winding wires“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60851-6:2012. The following dates are fixed: latest dat
12、e by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-03-27 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2015-06-27 This document supersedes EN 60851-6:1996
13、 + A1:1997 + A2:2004. EN 60851-6:2012 includes the following significant technical changes with respect to EN 60851-6:1996 + A1:1997 + A2:2004: - deletion of Table 2: Heating period in Test 10: Cut-through; - revision to Test 15, where the temperature index requirements for all winding wire construc
14、tions have a common reference. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standa
15、rd IEC 60851-6:2012 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated : IEC 60851-1 NOTE Harmonised as EN 60851-1. BS EN 60851-6:2012- 3 - EN 60851-6:2012 Annex ZA (normati
16、ve) Normative references to international publications with their corresponding European publications The 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
17、 references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60172 - Test procedure for the determ
18、ination of the temperature index of enamelled winding wires EN 60172 - IEC 60851-3 2009 Winding wires - Test methods - Part 3: Mechanical properties EN 60851-3 2009 IEC 60851-5 + A1 2008 2011 Winding wires - Test methods - Part 5: Electrical properties EN 60851-5 + A1 2008 2011 BS EN 60851-6:2012 2
19、60851-6 IEC:2012 CONTENTS INTRODUCTION . 5 1 Scope . 6 2 Normative references . 6 3 Test 9: Heat shock (applicable to enamelled and tape wrapped wire) . 6 3.1 General . 6 3.2 Specimen 6 3.2.1 Round wire 6 3.2.2 Rectangular wire . 7 3.3 Procedure . 7 3.4 Result . 7 4 Test 10: Cut-through (applicable
20、to enamelled round wire with a nominal conductor diameter over 0,100 mm up to and including 1,600 mm and tape wrapped round wire) . 7 4.1 General . 7 4.2 Equipment . 7 4.3 Procedure . 7 5 Test 15: Temperature index 8 6 Test 21: Loss of mass (applicable to enamelled round wire) . 8 6.1 General . 8 6.
21、2 Specimen 8 6.3 Procedure . 8 Annex A (informative) High temperature failure test (applicable to enamelled round wire) . 11 Bibliography 13 Figure 1 Compression device for the cut-through test 10 Table 1 Magnification . 7 Table 2 Loads applied to the crossing point . 8 Table A.1 Test voltage . 11 B
22、S EN 60851-6:201260851-6 IEC:2012 5 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 describing: 1) winding wires test methods (IEC 60851); 2) specifications for parti
23、cular types of winding wires (IEC 60317); 3) packaging of winding wires (IEC 60264). BS EN 60851-6:2012 6 60851-6 IEC:2012 WINDING WIRES TEST METHODS Part 6: Thermal properties 1 Scope This part of IEC 60851 specifies the following tests: Test 9: Heat shock; Test 10: Cut-through; Test 15: Temperatur
24、e index; Test 21: Loss of mass. 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 documents, in whole or in part, are normatively referenced in this document and are indispensable for
25、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 60172, Test procedure for the determination of the temperature index of enamelled winding wires IEC 60851-3:2009, Windi
26、ng wires Test methods Part 3: Mechanical properties IEC 60851-5:2008, Winding wires Test methods Part 5: Electrical properties Amendment 1:2011 3 Test 9: Heat shock (applicable to enamelled and tape wrapped wire) 3.1 General Heat shock is the potential of the wire to withstand temperature exposure a
27、fter the wire has been stretched and/or wound or bent around a mandrel. 3.2 Specimen 3.2.1 Round wire A specimen shall be prepared in accordance with: 5.1.1.1 of IEC 60851-3:2009 for enamelled wires with a nominal conductor diameter up to and including 1,600 mm; 5.2 of IEC 60851-3:2009 for enamelled
28、 wires with a nominal conductor diameter over 1,600 mm; 5.1.1.4 of IEC 60851-3:2009 for tape wrapped wires with a nominal conductor diameter up to and including 1,600 mm; BS EN 60851-6:201260851-6 IEC:2012 7 5.5.4 of IEC 60851-3:2009 for tape wrapped wires with a nominal conductor diameter over 1,60
29、0 mm. 3.2.2 Rectangular wire A specimen shall be prepared in accordance with 5.1.2 of IEC 60851-3:2009, bent however, only flatwise (on the thickness). 3.3 Procedure The specimen is placed into an oven with forced air circulation for a period of 30 min and at a temperature 5 C specified in the relev
30、ant standard. After removal from the oven, the specimen shall be allowed to cool to room temperature and shall then be examined for cracks under a magnification according to Table 1. Table 1 Magnification Wire dimension Magnification Round wire of nominal conductor diameter up to and including 0,040
31、 mm 10 to 15 times Round wire of nominal conductor diameter over 0,040 mm up to and including 0,500 mm 6 to 10 times Round wire of nominal conductor diameter over 0,500 mm 1 to 6 times Rectangular wire 6 to 10 times 3.4 Result Three specimens shall be tested in the case of round wire and two specime
32、ns shall be tested in the case of rectangular wire. Any crack detected shall be reported. 4 Test 10: Cut-through (applicable to enamelled round wire with a nominal conductor diameter over 0,100 mm up to and including 1,600 mm and tape wrapped round wire) 4.1 General Cut-through is expressed as the t
33、emperature at which a short circuit occurs between two pieces of wire crossing each other at right angles with a specified load applied to the crossing point. NOTE In many cases, the cut-through temperature indicates decomposition of the insulation. 4.2 Equipment The following equipment shall be use
34、d: metal block of brass or copper provided with means for electrical heating and temperature measurement and control, with two slots for inserting two wire pieces, which cross each other at right angles with the crossing point in the centre of the block, and with a ceramic piston to apply a load on
35、the crossing point, as shown in Figure 1; -transformer of at least 100 VA providing an alternating test voltage of (100 10) V, connected to an overcurrent device operating at a current of (5 1) mA, and to a resistor limiting the current to 50 mA maximum. 4.3 Procedure Two straight pieces of wire sha
36、ll be inserted into the metal block crossing each other at right angles, with the metal block pre-heated at the temperature specified in the relevant standard. BS EN 60851-6:2012 8 60851-6 IEC:2012 The temperature shall be measured as close as possible to the crossing point and shall not vary by mor
37、e than 3 C from the specified value. The crossing point shall lie centrally under the piston. In the case of wire of a nominal conductor diameter of less than 0,200 mm, two straight pieces of wire shall be placed in parallel, side by side, and a third piece shall be placed at right angles across the
38、 first two with the crossing points arranged symmetrically to the axis of the piston. A load as given in Table 2 shall be applied by means of the piston. Immediately thereafter, the test voltage shall be applied between the lower and upper pieces of wire. In the case where two lower pieces are used,
39、 they shall be connected. The load and the test voltage shall be applied for 2 min. Three tests shall be made. Any failure shall be reported. Table 2 Loads applied to the crossing point Nominal conductor diameter mm Load N Over Up to and including 0,100 0,125 1,25 0,125 0,315 2,20 0,315 0,500 4,50 0
40、,500 0,800 9,00 0,800 1,250 18,00 1,250 1,600 36,00 5 Test 15: Temperature index The temperature index shall be determined in accordance with IEC 60172 (on unimpregnated specimens). 6 Test 21: Loss of mass (applicable to enamelled round wire) 6.1 General Loss of mass refers to the wire coating and i
41、ndicates the degree of curing. 6.2 Specimen A piece of wire providing not less than 0,5 g of coating shall be cleaned by adequate means without affecting the coating. The specimen shall be heated for 1 h at (130 3) C in an oven with forced air circulation. After removal from the oven, the specimen s
42、hall be placed in a desiccator and allowed to cool to room temperature for at least 30 min. The specimen shall then be weighed to 0,1 mg (M1). 6.3 Procedure A crucible shall be conditioned for 2 h at (150 3) C. The crucible containing the specimen shall then be placed in an oven with forced air circ
43、ulation for 2 h at a temperature that varies by not more than 3 C from the value specified in the relevant standard. After removal from the oven, the specimen shall be placed in a desiccator and allowed to cool to room temperature for at least 30 min. The specimen shall then be weighed to 0,1 mg (M2
44、). The coating shall be removed by suitable chemical means not affecting the conductor and the bare conductor shall be dried for (15 1) min at (150 3) C, placed in a desiccator and BS EN 60851-6:201260851-6 IEC:2012 9 allowed to cool to room temperature for at least 30 min. The bare conductor shall
45、then be weighed to 0,1 mg (M3). The loss of mass shall be determined according to the following equation: % 1003121=MMMMM Two tests shall be made. The two single values shall be reported. BS EN 60851-6:2012 10 60851-6 IEC:2012 Dimenssions in millimetres 5 3 6 4 7 1 2 7 12 13 14 9 7 10 7 8 A 100100 9
46、 6 10 4 3 8 11 70Section A-A A IEC 910/12 Key 1. Specimen 8. Hole for insertion of the temperature controling device 2. Specimen 9. Hole for insertion of the thermocouple 3. Piston 10. Hole for insertion of the loaded piston 4. Ceramic piston 11. Electrical heating element 5. Load 12. Temperature co
47、ntrolling device 6. Metal block (copper or brass) 13. Insulated terminals for connection of the wire specimens 7. Solts for insertion of the specimens 14. Insulated base plate Figure 1 Compression device for the cut-through test BS EN 60851-6:201260851-6 IEC:2012 11 Annex A (informative) High temper
48、ature failure test (applicable to enamelled round wire) A.1 General High-temperature failure is expressed by the time to failure of a specimen, which is connected to a test voltage while exposed to elevated temperature. NOTE This test is intended to indicate the performance of wire at temperatures u
49、p to 450 C where overload conditions under voltage stress are possible. It is not practical to use this test for conditions which produce failures in seconds or in a few minutes because the test duration is substantially longer. A.2 Equipment The following equipment is used: oven with or without forced air circulation providing a maximum service temperature of 450 C. The temperature should not vary from the set temperature by more t
