Edition 1 0 2013 07 International Standard Norme-Books Pdf

Edition 1 0 2013 07 INTERNATIONAL STANDARD NORME
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This is a preview click here to buy the full publication. 2 60255 149 IEC 2013, FOREWORD 4, 2 Normative references 6. 3 Terms and definitions 7, 4 Specification of the function 8. 4 1 General 8, 4 2 Input energizing quantities energizing quantities 9. 4 3 Binary input signals 9, 4 4 Functional logic 10. 4 4 1 Equivalent heating current 10, 4 4 2 Basic setting and operating current values for thermal protection 10.
4 4 3 Thermal level calculation 11, 4 4 4 Time current limit characteristic equations and curves 12. 4 4 5 Thermal level alarm threshold 14, 4 5 Binary output signals 15. 4 5 1 General 15, 4 5 2 Operate trip output signal 15. 4 5 3 Alarm signal 15, 4 5 4 Other binary output signals 15. 4 6 Additional influencing factors on thermal protection 16. 4 6 1 General 16, 4 6 2 Influence of ambient temperature on thermal protection 16.
4 6 3 Thermal reset facilities 16, 4 7 Behaviour of thermal protective device during auxiliary power supply failure 17. 5 Performance specification 17, 5 1 Accuracy related to the characteristic quantity 17. 5 2 Accuracy related to the operate time 17, 5 3 Performance during frequency variations 18. 6 Functional test methodology 18, 6 1 General 18, 6 2 Determination of steady state errors related to the operating current value 19. 6 3 Determination of steady state errors related to the characteristic quantity and. the operate time 19, 6 3 1 Accuracy determination of the cold curve 19.
6 3 2 Accuracy determination of the hot curves 20, 6 4 Performance with specific cooling thermal time constant 21. 6 5 Performance with harmonics 22, 6 6 Performance during frequency variations 22. 6 7 Performance during different ambient temperatures 23. 7 Documentation requirements 24, 7 1 Type test report 24. 7 2 Other user documentation 24, Annex A informative Simple first order thermal model of electrical equipment 26. Annex B informative Thermal electrical relays which use temperature as setting. parameters 41, Bibliography 46, This is a preview click here to buy the full publication.
60255 149 IEC 2013 3, Figure 1 Simplified thermal protection function block diagram 9. Figure 2 Typical examples of characteristic curves for cold state of a first order. thermal system with no previous load before overload occurs 13. Figure 3 Typical examples of characteristic curves for hot states of a first order. thermal system for different values of previous load before overload occurs 14. Figure A 1 An electrical equipment to be thermally protected represented as a. simple first order thermal system 26, Figure A 2 Equivalence between a first order thermal system and an electric parallel. RC circuit 30, Figure A 3 Analogue thermal circuit representation of a simple first order thermal. Figure A 4 Analogue thermal circuit representation of a simple first order thermal. system motor starting condition 31, Figure A 5 Analogue thermal circuit representation of a simple first order thermal. system motor stopped condition 31, Figure A 6 Dynamic step response of a simple first order thermal system algorithm to.
a current below pickup 33, Figure A 7 Dynamic step response of a first order thermal system cold initial state 34. Figure A 8 Dynamic step response of a first order thermal system hot initial state 34. Figure A 9 Dynamic step response of a first order thermal system to a load current. followed by an overload current initial state cold 35. Figure A 10 Dynamic step response of a first order thermal system to a load current. followed by an overload current initial state hot 35. Table 1 Limiting error as multiples of assigned error 18. Table 2 Test points of the cold curve 20, Table 3 Test points of the hot curve 21. Table 4 Test points of the cold curve with harmonics 22. Table 5 Test points of the cold curve during frequency variations 22. Table A 1 Thermal and electrical models 30, Table A 2 Thermal insulation classes and maximum temperatures according to. IEC 60085 40, Table A 3 Example of correction factor values F a for class F equipment according. to the ambient temperature T a 40, This is a preview click here to buy the full publication.
4 60255 149 IEC 2013, INTERNATIONAL ELECTROTECHNICAL COMMISSION. MEASURING RELAYS AND PROTECTION EQUIPMENT, Part 149 Functional requirements for thermal electrical relays. 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 concerning 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 Their 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 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 relevant 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 the 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 maximum 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 itself does not provide any attestation of conformity Independent certification bodies provide conformity. assessment services and in some areas access to IEC marks of conformity IEC is not responsible for any. services carried out by independent certification bodies. 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 committees 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. Publications, 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. patent rights IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60255 149 has been prepared by IEC technical committee 95. Measuring relays and protection equipment, This first edition cancels and replaces IEC 60255 8 published in 1990. The text of this standard is based on the following documents. FDIS Report on voting, 95 313 FDIS 95 317 RVD, Full information on the voting for the approval of this standard can be found in the report on. voting indicated in the above table, This publication has been drafted in accordance with the ISO IEC Directives Part 2.
This is a preview click here to buy the full publication. 60255 149 IEC 2013 5, A list of all parts of IEC 60255 series under the general title Measuring relays and protection. equipment can be found on the IEC website, Future standards in this series will carry the new general title as cited above Titles of existing. standards in this series will be updated at the time of the next edition. 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. related to the specific publication At this date the publication will be. reconfirmed, replaced by a revised edition or, 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. understanding of its contents Users should therefore print this document using a. colour printer, This is a preview click here to buy the full publication. 6 60255 149 IEC 2013, MEASURING RELAYS AND PROTECTION EQUIPMENT.
Part 149 Functional requirements for thermal electrical relays. This part of the IEC 60255 series specifies minimum requirements for thermal protection. relays This standard includes specification of the protection function measurement. characteristics and test methodologies, The object of this standard is to establish a common and reproducible reference for evaluating. dependent time relays which protect equipment from thermal damage by measuring a c. current flowing through the equipment Complementary input energizing quantities such as. ambient coolant top oil and winding temperature may be applicable for the thermal protection. specification set forth in this standard This standard covers protection relays based on a. thermal model with memory function, The test methodologies for verifying performance characteristics of the thermal protection. function and accuracy are also included in this Standard. This standard does not intend to cover the thermal overload protection trip classes indicated. in IEC 60947 4 1 and IEC 60947 4 2 related to electromechanical and electronic protection. devices for low voltage motor starters, The thermal protection functions covered by this standard are as follows. Protection function IEC 61850 7 4 IEEE C37 2, Thermal overload protection PTTR 49. Rotor thermal overload protection PROL 49R, Stator thermal overload protection PSOL 49S.
General requirements for measuring relays and protection equipment are specified in. IEC 60255 1, 2 Normative references, 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 references the latest edition of the referenced document including any. amendments applies, IEC 60050 all parts International Electrotechnical Vocabulary available at. http www electropedia org, IEC 60085 Electrical insulation Thermal evaluation and designation. IEC 60255 1 Measuring relays and protection equipment Part 1 Common requirements. IEC 61850 7 4 Communication networks and systems for power utility automation Part 7 4. Basic communication structure Compatible logical node classes and data classes. This is a preview click here to buy the full publication. 48 60255 149 CEI 2013, AVANT PROPOS 50, 1 Domaine d application 52. 2 R f rences normatives 52, 3 Termes et d finitions 53.
4 Sp cification de la fonction 54, 4 1 G n ralit s 54. 4 2 Grandeurs d alimentation d entr e grandeurs d alimentation 55. 4 3 Signaux d entr e binaires 55, 4 4 Logique fonctionnelle 56. 4 4 1 Courant d chauffement quivalent 56, 4 4 2 Valeurs de courant de fonctionnement et de base r glage pour la. protection thermique 56, 4 4 3 Calcul du niveau thermique 57. 4 4 4 Courbes et quations des caract ristiques temps courant de. d clenchement 59, 4 4 5 Seuil d alarme de niveau thermique 61.
4 5 Signaux de sortie binaires 62, 4 5 1 G n ralit s 62. 4 5 2 Signal de sortie de fonctionnement d clenchement 62. 4 5 3 Signal d alarme 62, 4 5 4 Autres signaux de sortie binaires 62. 4 6 Facteurs d influence suppl mentaires sur la protection thermique 62. 4 6 1 G n ralit s 62, 4 6 2 Influence de la temp rature ambiante sur la protection thermique 63. 4 6 3 Equipement de r initialisation thermique 63, 4 7 Comportement du dispositif de protection thermique pendant une d faillance. de l alimentation secondaire 63, 5 Sp cification des performances 64.
5 1 Pr cision li e la grandeur caract ristique 64, 5 2 Pr cision li e au temps de fonctionnement 64. 5 3 Performances pendant des variations de fr quence 65. 6 M thodologie d essais fonctionnels 65, 6 1 G n ralit s 65. 6 2 D termination des erreurs en r gime tabli li es la valeur du courant de. fonctionnement 66, 6 3 D termination des erreurs en r gime tabli li es la grandeur. caract ristique et au temps de fonctionnement 67, 6 3 1 D termination de la pr cision de la courbe froid 67. 6 3 2 D termination de la pr cision des courbes chaud 68. 6 4 Performances avec une constante de temps thermique de refroidissement. sp cifique 68, 6 5 Performances avec des harmoniques 69.
6 6 Performances pendant des variations de fr quence 70. 6 7 Performances pendant diff rentes temp ratures ambiantes 70. patent rights IEC shall not be held responsible for identifying any or all such patent rights International Standard IEC 60255 149 has been prepared by IEC technical committee 95 Measuring relays and protection equipment This first edition cancels and replaces IEC 60255 8 published in 1990

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