1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationSpecification for high-voltagefuse-links for motor circuit applicationBS EN 60644:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 09:10, Uncontrolled Copy,
2、(c) BSINational forewordThis British Standard is the UK implementation of EN 60644:2009. It is identi-cal to IEC 60644:2009. It supersedes BS EN 60644:1993 which is withdrawn.The UK participation in its preparation was entrusted to Technical CommitteePEL/32, Fuses.A list of organizations represented
3、 on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2010ISBN 978 0 580 59133 4ICS 29.120.50Compliance with a British Standard cannot confer immunit
4、y fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 January 2010Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60644:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2
5、010 09:10, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 60644 NORME EUROPENNE EUROPISCHE NORM December 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: Avenue M
6、arnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60644:2009 E ICS 29.120.50 Supersedes EN 60644:1993English version Specification for high-voltage fuse-links for motor circuit application (IEC 60644
7、:2009) Spcification relative aux lments de remplacement haute tension destins des circuits comprenant des moteurs (CEI 60644:2009) Anforderungen fr Hochspannungs-Sicherungseinstze fr Motorstromkreise (IEC 60644:2009) This European Standard was approved by CENELEC on 2009-10-01. CENELEC members are b
8、ound to comply with the CEN/CENELEC Internal Regulations which stipulate 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
9、 Central Secretariat or to any CENELEC member. This European Standard 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 sa
10、me status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Nor
11、way, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60644:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 09:10, Uncontrolled Copy, (c) BSIEN 60644:2009 - 2 - Foreword The text of document 32A/267/CDV, future edition 2 of
12、 IEC 60644, prepared by SC 32A, High-voltage fuses, of IEC TC 32, Fuses, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60644 on 2009-10-01. This European Standard supersedes EN 60644:1993. The main changes with regard to EN 60644:1993 concern the following: update
13、of the normative references; renewal of the figures. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2010-07-01 latest date by which the national standards conflicting with th
14、e EN have to be withdrawn (dow) 2012-10-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60644:2009 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be a
15、dded for the standard indicated: IEC 60470 NOTE Harmonized as EN 60470:2000 (not modified). _ BS EN 60644:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 09:10, Uncontrolled Copy, (c) BSI- 3 - EN 60644:2009 Annex ZA (normative) Normative references to international publications
16、 with their corresponding European publications The following referenced documents are indispensable for the application 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. N
17、OTE 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 60282-1 2005 High-voltage fuses - Part 1: Current-limiting fuses EN 60282-1 2006 BS EN 60644:2009Licensed Copy: Wang Bin, ISO/EXCHANG
18、E CHINA STANDARDS, 12/04/2010 09:10, Uncontrolled Copy, (c) BSI 2 60644 IEC:2009 CONTENTS 1 Scope.5 2 Normative references .5 3 Fuse-link time-current characteristics .5 4 K factor 6 5 Withstand requirements6 6 Withstand tests.6 6.1 General .6 6.2 Test sequence No. 1 .7 6.3 Test sequence No. 2 .7 6.
19、4 Interpretation of the test results.8 7 Information to be given to the user .8 8 Selection of fuse-links for motor circuit applications and correlation of fuse-link characteristics with those of other components of the circuit.9 8.1 Selection of fuse-links .9 8.2 Co-ordination with other circuit co
20、mponents 9 Bibliography12 Figure 1 Diagrams of the test sequences .7 Figure 2 Determination of K factor for fuse-links of intermediate rating of a homogeneous series.8 Figure 3 Characteristics relating to the protection of a motor circuit .11 BS EN 60644:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHI
21、NA STANDARDS, 12/04/2010 09:10, Uncontrolled Copy, (c) BSI60644 IEC:2009 5 SPECIFICATION FOR HIGH-VOLTAGE FUSE-LINKS FOR MOTOR CIRCUIT APPLICATIONS 1 Scope This standard applies primarily to fuse-links used with motors started direct-on-line on alternating current systems of 50 Hz and 60 Hz. NOTE Wh
22、en motors are used with assisted starting this specification can also be applied but particular attention should be paid to the selection of the rated current of the fuse-link (see 8.1) and the manufacturer of the fuse-link should preferably be consulted. Fuse-links according to this specification a
23、re intended to withstand normal service conditions and motor starting pulses. They should comply with the requirements of IEC 60282-1. The purpose of this standard is to standardize time-current characteristics, to formulate pulse withstand requirements regarding testing and to give guidance regardi
24、ng the selection of fuse-links intended to be used with motors. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documen
25、t (including any amendments) applies. IEC 60282-1:2005, High-voltage fuses Part 1: Current-limiting fuses 3 Fuse-link time-current characteristics Compared to fuses typically used for distribution system protection, fuses for motor circuit protection should have: relatively high melting current (slo
26、w operation) in the 10 s region of the pre-arcing time-current characteristic to give maximum withstand against motor starting current; relatively low melting current (fast operation) in the region below 0,1 s to give maximum short-circuit protection to associated switching devices, cables and motor
27、s and their terminal boxes. Therefore pre-arcing time-current characteristics of fuse-links for motor circuit applications shall be within the following limits: 3/10nIIffor 100nI4/10nIIffor 100nI()25,010020/1,0nnIIIf for all current ratings where Inis the numerical value of the current rating, expre
28、ssed in amperes, of the fuse-link; BS EN 60644:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 09:10, Uncontrolled Copy, (c) BSI 6 60644 IEC:2009 10fI and 1,0fI are the numerical values of the pre-arcing currents, expressed in amperes, corresponding to 10 s and 0,1 s respective
29、ly, as mean values with the tolerances specified in 4.11 of IEC 60282-1. The term ()25,0100nI is introduced to take account of the fact that the pre-arcing time-current characteristics for a range of fuse-links diverge as they approach the short-time region. 4 K factor Factor which defines an overlo
30、ad characteristic to which the fuse-link may be repeatedly subjected under specified motor starting conditions, and other specified motor-operating overloads, without deterioration. For the purpose of this specification, the value of K is chosen at 10 s. Unless otherwise stated by the fuse-link manu
31、facturer, it is valid from 5 s to 60 s, for a frequency of starts up to six per hour and for not more than two consecutive starts. For conditions different from those specified above, for example where service conditions involve inching, plugging or more frequent starts, the manufacturer should be c
32、onsulted. The overload characteristic is obtained by multiplying the current on the pre-arcing characteristic by K (less than unity). 5 Withstand requirements The performance of a fuse-link for motor circuit applications is in general determined by the following criteria: to withstand without deteri
33、oration starting pulses in rapid succession due for example to abnormal conditions, such as those occurring during commissioning of the equipment; to withstand without deterioration a large number of motor starts in normal service conditions. This standard therefore specifies two sequences of tests
34、representative of these conditions: 100 cycles corresponding to abnormal service conditions; 2 000 cycles corresponding to normal service conditions. It is expected that a fuse-link which passes these tests will have a good behaviour during a satisfactory life duration. 6 Withstand tests 6.1 General
35、 The withstand tests are type tests. Both test sequences shall be carried out on the same fuse-link. The fuse-link shall be tested under the same test conditions as in 6.5.1.2 of IEC 60282-1. The values of test currents shall be 10fIK for pulses simulating the motor starting pulses and 610fIK for pe
36、riods simulating the normal motor running, 10fI being the pre-arcing current at 10 s. The tolerance on both values shall be 100+%. The duration of individual pulses shall be 10 s. The tolerance on the 10 s periods, both pulses and off periods, shall be 0,5 s. Tests shall be made at any convenient vo
37、ltage and at a frequency from 48 Hz to 62 Hz. BS EN 60644:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 09:10, Uncontrolled Copy, (c) BSI60644 IEC:2009 7 6.2 Test sequence No. 1 This test sequence shall comprise 100 cycles of 1 h as follows: a current 10fIK for 10 s; an off p
38、eriod of 10 s; a current 10fIK for 10 s; a current 610fIK for 3 560 s; an off period of 10 s. 6.3 Test sequence No. 2 This test sequence shall comprise 2 000 cycles of 10 min as follows: a current 10fIK for 10 s; a current 610fIK for 290 s; an off period of 300 s. Test sequences No.1 and No.2 are il
39、lustrated in Figure 1. KIf10KIf10/6 0 10 20 30 3 590 3 600t (s) 100 cyclesTest sequence No. 1 KIf10KIf10/6 0 10 300 600 t (s) 2 000 cycles Test sequence No. 2 IEC 1526/09 IEC 1527/09 Figure 1 Diagrams of the test sequences BS EN 60644:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/
40、2010 09:10, Uncontrolled Copy, (c) BSI 8 60644 IEC:2009 6.4 Interpretation of the test results After each test sequence is completed, the fuse-link shall be allowed to cool. After cooling, there shall have been no significant change in its characteristics. A check need not be made until after comple
41、tion of both test sequences. Measurements to show that there is no significant difference in the values of resistance of the fuse-links before and after test give an indication of conformity with this requirement. In case of doubt, a further method is to subject the fuse-link after cooling after tes
42、t to the current 10fIK sustained for a sufficient time to cause the fuse-element to melt. The pre-arcing time shall lie within the tolerances of the pre-arcing time-current characteristic given by the manufacturer. If fuse-links form part of a homogeneous series as defined in items d), e) and f) of
43、6.6.4.1 of IEC 60282-1, the maximum and minimum current ratings only need be tested. If the same value of K is assigned to both maximum and minimum current ratings, then that value may also be deemed to apply to all intermediate current ratings within the homogeneous series. If different values of K
44、 are assigned to the maximum and minimum current ratings, then the K factors for intermediate ratings may be determined by linear interpolation; see Figure 2. If a manufacturer assigns a higher value of K for an intermediate rating than that resulting from interpolation, this assigned value shall be
45、 proved by tests to the requirements of Clause 6. Pre-arcing current at 10 s Maximumcurrent rating Intermediate currentratingMinimumcurrentrating K IEC 1528/09 Figure 2 Determination of K factor for fuse-links of intermediate rating of a homogeneous series 7 Information to be given to the user Altho
46、ugh in principle any high-voltage fuse-link can be used to protect motor circuits, there are advantages in selecting a fuse-link specifically designed for this application. BS EN 60644:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 09:10, Uncontrolled Copy, (c) BSI60644 IEC:20
47、09 9 For fuse-links intended to be used for motor circuit protection, the manufacturer shall state the K factor which will indicate to the user the degree to which the fuse-link is capable of withstanding cyclic overloads without deterioration. It shall be stated if the K factor is related to the mi
48、nimum or the mean pre-arcing time-current characteristic. The pre-arcing time-current characteristic of the fuse-link with current values multiplied by factor K thus defines the boundary of the overload curve for a given number of motor starts per hour. 8 Selection of fuse-links for motor circuit ap
49、plications and correlation of fuse-link characteristics with those of other components of the circuit 8.1 Selection of fuse-links The fuse-link is inserted into the motor circuit that the fuse-link is intended to protect. Some ratings of the fuse-links (e.g. rated voltage and rated breaking current) are therefore dependent on the system and others (e.g. rated current) are dependent on the motor. The ability to withstand repetitive starting conditions
