SIST EN 60044-5:2005
(Main)Instrument transformers -- Part 5: Capacitor voltage transformers
Instrument transformers -- Part 5: Capacitor voltage transformers
This part of EN 60044 applies to new single-phase capacitor voltage transformers connected between line and ground for system voltages Um 72,5 kV at power frequencies from 15 Hz to 100 Hz. They are intended to supply a low voltage for measurement, control and protective functions. The capacitor voltage transformer can be equipped with or without carrier-frequency accessories for power line carrier-frequency (PLC) application at carrier frequencies from 30 kHz to 500 kHz.
Messwandler -- Teil 5: Kapazitive Spannungswandler
Transformateurs de mesure -- Partie 5: Transformateurs condensateurs de tension
La présente partie de la EN 60044 s'applique aux transformateurs condensateurs de tension monophasés neufs connectés entre la ligne et la terre pour des tensions de réseau Um 72,5 kV aux fréquences industrielles comprises entre 15 Hz et 100 Hz. Ils sont destinés à fournir une basse tension pour les fonctions mesure, commande et protection. Le transformateur condensateur de tension peut être équipé avec ou sans accessoires de couplage pour courant porteur sur ligne (CPL) aux fréquences porteuses de 30 kHz à 500 kHz.
Instrumentni transformatorji – 5. del: Kapacitivni napetostnik (IEC 60044-5:2004)
General Information
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Standards Content (Sample)
SIST EN 60044-5:2005SLOVENSKIdecember 2005
STANDARDInstrumentni transformatorji – 5. del: Kapacitivni napetostnik (IEC 60044-5:2004)Instrument transformers - Part 5: Capacitor voltage transformers (IEC 60044-5 :2004)©
Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljenoReferenčna številkaSIST EN 60044-5:2005(en)ICS17.220.20
EUROPEAN STANDARD
EN 60044-5 NORME EUROPÉENNE EUROPÄISCHE NORM
June 2004 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60044-5:2004 E
ICS 17.220.20 Supersedes HD 554 S1:1992
English version
Instrument transformers Part 5: Capacitor voltage transformers (IEC 60044-5:2004)
Transformateurs de mesure Partie 5: Transformateurs condensateurs de tension (CEI 60044-5:2004)
Messwandler Teil 5: Kapazitive Spannungswandler (IEC 60044-5:2004)
This European Standard was approved by CENELEC on 2004-06-01. 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 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 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 same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 60044-5:2004 - 2 -
Foreword The text of document 38/320/FDIS, future edition 1 of IEC 60044-5, prepared by IEC TC 38, Instrument transformers, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60044-5 on 2004-06-01. This European Standard, together with EN 60044-2:1999, supersedes HD 554 S1:1992. 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) 2005-03-01 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow) 2007-06-01 Annex ZA has been added by CENELEC. __________ Endorsement notice The text of the International Standard IEC 60044-5:2004 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 60721 NOTE Harmonized in EN 60721 series (not modified). __________
- 3 - EN 60044-5:2004
Annex ZA
(normative)
Normative references to international publications
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. NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60028 - 1) International standard of resistance for copper
- - IEC 60038 (mod) - 1) IEC standard voltages 2)
HD 472 S1 + corr. February 1989 3) 2002
IEC 60044-2 (mod) - 1) Instrument transformers Part 2: Inductive voltage transformers
EN 60044-2 1999 3) IEC 60050-321 - 1) International electrotechnical vocabulary - Chapter 321: Instrument transformers
- - IEC 60050-436 - 1) Chapter 436: Power capacitors
- - IEC 60050-601 - 1) Chapter 601: Generation, transmission and distribution of electricity - General
- - IEC 60050-604 - 1) Chapter 604: Generation, transmission and distribution of electricity - Operation
- - IEC 60060-1 - 1) High-voltage test techniques Part 1: General definitions and test requirements
HD 588.1 S1 1991 3) IEC 60071-1 - 1) Insulation co-ordination Part 1: Definitions, principles and rules
EN 60071-1 1995 3) IEC 60085 - 1) Thermal evaluation and classification of electrical insulation
HD 566 S1 1990 3) IEC 60270 - 1) High-voltage test techniques - Partial discharge measurements
EN 60270 2001 3) IEC 60358 - 1) Coupling capacitors and capacitor dividers
HD 597 S1 + corr. March 1992 3) 1992
1) Undated reference. 2) The title of HD 472 S1 is: Nominal voltages for low-voltage public electricity supply systems. 3) Valid edition at date of issue.
EN 60044-5:2004 - 4 -
Publication Year Title EN/HD Year IEC 60481 - 1) Coupling devices for power line carrier systems
- - IEC 60815 - 1) Guide for the selection of insulators in respect of polluted conditions
- - IEC 62155 (mod) - 1) Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1 000 V
EN 62155 2003 3) CISPR 18-2 - 1) Radio interference characteristics of overhead power lines and high-voltage equipment - Part 2: Methods of measurement and procedure for determining limits
- -
NORME INTERNATIONALECEIIEC INTERNATIONAL STANDARD 60044-5Première éditionFirst edition2004-04 Transformateurs de mesure – Partie 5: Transformateurs condensateurs de tension
Instrument transformers – Part 5: Capacitor voltage transformers Pour prix, voir catalogue en vigueur For price, see current catalogue IEC 2004
Droits de reproduction réservés
Copyright - all rights reserved Aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur. 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 Varembé, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch
Web: www.iec.ch CODE PRIX PRICE CODE XB Commission Electrotechnique InternationaleInternational Electrotechnical CommissionМеждународнаяЭлектротехническаяКомиссия
60044-5 IEC:2004 – 3 –
CONTENTS FOREWORD.11
1 Scope.15 2 Normative references.15 3 Terms and definitions.17 3.1 General definitions.17 3.2 Capacitor voltage divider definitions.27 3.3 Electromagnetic unit definitions.33 3.4 Carrier-frequency accessories definitions.35 4 General requirements.35 5 Service conditions.35 5.1 Normal service conditions.35 5.2 Special service conditions.39 5.3 System earthing.41 6 Ratings.41 6.1 Standard values of rated frequency.41 6.2 Standard values of rated voltages.41 6.3 Standard values of rated output.43 6.4 Standard values of rated voltage factor.43 6.5 Limits of temperature rise.45 7 Design requirements.47 7.1 Insulation requirements.47 7.2 Other insulation requirements.51 7.3 Short-circuit withstand capability.57 7.4 Ferro-resonance.57 7.5 Electromagnetic emission requirements.59 7.6 Mechanical requirements.61 7.7 Tightness of capacitor voltage divider and electromagnetic unit.63 8 Classification of tests.63 8.1 Type tests.63 8.2 Routine tests.69 8.3 Special tests.69 8.4 Test sequence for one or two units.69 9 Type test.69 9.1 Temperature-rise test.69 9.2 Capacitance and tanδ measurement at power-frequency.73 9.3 Short-circuit withstand capability test.75 9.4 Impulse tests.77 9.5 Wet test for outdoor capacitor voltage transformer.79 9.6 Ferro-resonance tests.81 9.7 Tightness test of a liquid-filled electromagnetic unit.83 9.8 Accuracy tests.83 9.9 Transient response test.87 9.10 Radio interference voltage test.91
60044-5 IEC:2004 – 5 –
10 Routine tests.91 10.1 Tightness of the liquid-filled capacitor voltage divider.91 10.2 Power-frequency withstand test and measurement of capacitance, tanδ and partial discharge.91 10.3 Verification of terminal markings.101 10.4 Power-frequency withstand tests on the electromagnetic unit.101 10.5 Ferro-resonance check.103 10.6 Accuracy check.103 11 Special tests.107 11.1 Measurement of the transmission factor of high frequency overvoltages.107 11.2 Mechanical strength test.107 11.3 Determination of the temperature coefficient (TC).109 11.4 Tightness design test of capacitor units.109 12 Marking of the capacitor units.109 12.1 General.109 12.2 Marking.109 13 Terminal markings.109 13.1 General.109 13.2 Markings.111 14 Additional requirements for measuring capacitor voltage transformer.111 14.1 Accuracy class designation.111 14.2 Standard reference range of frequency.111 14.3 Standard accuracy classes.113 14.4 Limits of voltage error and phase displacement.113 14.5 Tests for accuracy.115 15 Additional requirements for protective capacitor voltage transformers.115 15.1 Accuracy class designation.115 15.2 Standard reference range of frequency.115 15.3 Standard accuracy classes.115 15.4 Limits of voltage error and phase displacement.115 15.5 Transient response.117 15.6 Requirements for secondary windings intended to produce a residual voltage.119 16 Rating plate.123 16.1 Markings of the rating plate.123 16.2 Example of a typical rating plate.129 17 Requirements for carrier – frequency accessories.131 17.1 General.131 17.2 Drain coil and voltage limitation device.131 17.3 Type tests for carrier frequency accessories.133 17.4 Routine tests for carrier frequency accessories.133 17.5 Marking of the rating plate.135
60044-5 IEC:2004 – 7 –
Annex A (normative)
Typical diagram of a capacitor voltage transformer.137 Annex B (informative)
Transient response of capacitor
voltage transformer under fault conditions.139 Annex C (normative)
High-frequency characteristics of capacitor voltage transformers.141
Bibliography.143
Figure 1 – Altitude correction factor for the insulation.39 Figure 2 – Altitude correction factor for the temperature rise .45 Figure 3 – Flow charts test sequence to be applied when performing the type test (Figure 3a) and routine test (Figure 3b).67 Figure 4 – Diagram of a capacitor voltage transformer for the transient response test using equivalent circuit method.89 Figure 5 – Series burden.89 Figure 6 – Pure resistance.89 Figure 7 – Test circuit.97 Figure 8 – Alternative circuit.97 Figure 9 – Example of balanced test circuit.99 Figure 10 – Example of calibration circuit.99 Figure 11 – Example of an error diagram of class 1 CVT for accuracy check with the equivalent circuit.105 Figure 12 – Single-phase transformer with a neutral primary terminal and a single secondary.111 Figure 13 – Single-phase transformer with a neutral primary terminal and with two secondaries.111 Figure 14 – Single-phase transformer with a neutral primary terminal and with two tapped secondaries.111 Figure 15 – Single-phase transformer with a neutral primary terminal, with one residual voltage winding and a single secondary.111 Figure 16 – Error diagram of a capacitor voltage transformer for accuracy classes 0,2, 0,5 and 1,0.113 Figure 17 – Transient response of a capacitor voltage transformer.117 Figure A.1 – Example of a diagram for a capacitor voltage transformer.137 Figure A.2 – Example of a diagram for a capacitor voltage transformer with carrier-frequency accessories.137
Table 1 – Rated ambient temperature categories.37 Table 2 – Standard values of rated voltage factors for accuracy and thermal requirements.43 Table 3 – Limits of temperature rise of windings.47 Table 4 – Standard insulation levels.49 Table 5 – Partial discharge test voltages and permissible levels.53 Table 6 – Creepage distance.57
60044-5 IEC:2004 – 9 –
Table 7a – Ferro-resonance requirements.59 Table 7b – Ferro-resonance requirements.59 Table 8 – Transmitted overvoltage requirements.61 Table 9 – Static withstand test loads.61 Table 10 – Test voltage & burden for temperature rise test.73 Table 11 – Burden ranges for accuracy tests.85 Table 12 – Test voltages for units, stacks and complete capacitor voltage divider.93 Table 13 – Ferro resonance check.103 Table 14 – Accuracy check points (example).105 Table 15 – Modalities of application of the test loads to the line primary terminals.107 Table 16 – Limits of voltage error and phase displacement for measuring capacitor voltage transformers.113 Table 17 – Limits of voltage error and phase displacement
for protective capacitor voltage transformers.117 Table 18 – Standard values.119 Table 19 – Rated secondary voltages for capacitor voltage transformers to produce a residual voltage.121 Table 20 – Marking of the rating plate.123
60044-5 IEC:2004 – 11 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION ___________
INSTRUMENT TRANSFORMERS –
Part 5: Capacitor voltage transformers
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 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 provides no marking procedure to indicate its approval and cannot be rendered responsible 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 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 60044-5, has been prepared by IEC technical committee 38: Instrument transformers. This standard replaces IEC 60186 regarding capacitor voltage transformers as well as IEC-PAS 60044-5.
60044-5 IEC:2004 – 13 –
The text of this standard is based on the following documents: FDIS Report on voting 38/320/FDIS 38/324/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 standard is Part 5 of IEC 60044, published under the general title Instrument transformers. This series consists of the following parts: IEC 60044-1:2003,
Instrument transformers – Part 1: Current transformers
IEC 60044-2:2003,
Instrument transformers – Part 2: Inductive voltage transformers IEC 60044-3:2002,
Instrument transformers – Part 3: Combined transformers
IEC 60044-5:2004
Instrument transformers – Part 5: Capacitor voltage transformers IEC 60044-6:1992,
Instrument transformers – Part 6: Requirements for protective current transformers for transient performance IEC 60044-7:1999,
Instrument transformers – Part 7: Electronic voltage transformers IEC 60044-8:2002,
Instrument transformers – Part 8: Electronic current transformers
The committee has decided that the contents of this publication will remain unchanged until 2007. At this date, the publication will be
• reconfirmed; • withdrawn; • replaced by a revised edition, or • amended.
60044-5 IEC:2004 – 15 –
INSTRUMENT TRANSFORMERS –
Part 5: Capacitor voltage transformers
1 Scope This part of IEC 60044 applies to new single-phase capacitor voltage transformers connected between line and ground for system voltages Um ≥ 72,5 kV at power frequencies from 15 Hz to 100 Hz. They are intended to supply a low voltage for measurement, control and protective functions.
The capacitor voltage transformer can be equipped with or without carrier-frequency accessories for power line carrier-frequency (PLC) application at carrier frequencies from
30 kHz to 500 kHz. This standard replaces IEC 60186 regarding capacitor voltage transformers. Three standards formed the basis for this IEC 60044-5 standard: − IEC 60044-2, concerning inductive voltage transformers;
− IEC 60358, concerning coupling capacitors and capacitor dividers; − IEC 60481, concerning coupling devices for power line carrier (PLC) systems. The measurement application includes both indication measuring and revenue measuring. NOTE Diagrams of capacitor voltage transformer to which this standard applies are given in Figures A.1 and A.2. 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 document (including any amendments) applies. IEC 60028, International standard of resistance for copper IEC 60038, IEC standard voltages IEC 60044-2, Instrument transformers – Part 2: Inductive voltage transformers IEC 60050-321:1986, International Electrotechnical Vocabulary (IEV) – Chapter 321: Instrument transformers IEC 60050-436:1990, International Electrotechnical Vocabulary (IEV) – Chapter 436: Power capacitors IEC 60050-601:1985, International Electrotechnical Vocabulary (IEV) – Chapter 601: Generation, transmission and distribution of electricity – General
60044-
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