1、BRITISH STANDARD BS EN 61211:2005 Insulators of ceramic material or glass for overhead lines with a nominal voltage greater than 1 000 V Impulse puncture testing in air The European Standard EN 61211:2005 has the status of a British Standard ICS 29.080.10 BS EN 61211:2005 This British Standard was p
2、ublished under the authority of the Standards Policy and Strategy Committee on 22 April 2005 BSI 22 April 2005 ISBN 0 580 45869 5 National foreword This British Standard is the official English language version of EN 61211:2005. It was derived by CENELEC from IEC 61211:2004. It supersedes BS 7803:19
3、95 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PEL/36, Insulators for power systems, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British S
4、tandards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.
5、This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible i
6、nternational/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the
7、EN title page, the EN foreword page, pages 3 to 16, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 61211 NORME EUROPENNE EUROPISCHE
8、NORM March 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any
9、 means reserved worldwide for CENELEC members. Ref. No. EN 61211:2005 E ICS 29.080.10 English version Insulators of ceramic material or glass for overhead lines with a nominal voltage greater than 1 000 V Impulse puncture testing in air (IEC 61211:2004) Isolateurs en matire cramique ou en verre dest
10、ins aux lignes ariennes de tension nominale suprieure 1 000 V Essais de perforation par chocs dans lair (CEI 61211:2004) Isolatoren aus keramischem Werkstoff oder Glas fr Freileitungen mit einer Nennspannung ber 1 kV Stospannungs-Durchschlagsprfungen unter Luftatmosphre (IEC 61211:2004) This Europea
11、n Standard was approved by CENELEC on 2005-03-01. 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 c
12、oncerning 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 i
13、nto 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, L
14、atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 36B/239/FDIS, future edition 2 of IEC 61211, prepared by SC 36B, Insulators for overhead lines, of IEC TC 36, Insulators, was s
15、ubmitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61211 on 2005-03-01. 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) 2005-12-01 latest date by whic
16、h the national standards conflicting with the EN have to be withdrawn (dow) 2008-03-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61211:2004 was approved by CENELEC as a European Standard without any modification. _ EN61211:2005 CONTENTS INTRO
17、DUCTION.4 1 Scope and object5 2 Normative references5 3 Terms and definitions .5 4 Abbreviations6 5 Impulse voltage puncture test on insulators in air 6 5.1 General requirements for the test.6 5.2 Mounting arrangements .6 5.3 Number of insulators to be tested 9 5.4 Measurement of the test voltage 9
18、5.5 Test voltage.9 5.6 Test procedure 10 5.7 Puncture determination10 5.8 Acceptance criteria11 5.9 Re-test procedure11 Annex A (normative) Method for determining U 50of the insulator for the basis of per unit (p.u.) values .12 Annex B (informative) Information on measuring short front high voltage
19、impulses13 Annex ZA (normative) Normative references to international publications with their corresponding European publications 15 Bibliography16 Figure 1 Mounting arrangements of cap and pin and long rod insulators7 Figure 2 Mounting arrangements of different pin insulators .8 Figure 3 Example of
20、 the applied impulse chopped at the test voltage by flashover of the insulator10 Figure A.1 Example for the per unit values .12 Figure B.1 Example of a recommendable configuration of a small size voltage divider.13 Page3 EN61211:2005 INTRODUCTION The text of this International Standard is based on t
21、he work of Maintenance Team 13 of IEC SC 36B and CIGRE Task Force 33.07.01 and on two ELECTRA reports. Reference is made to these two reports in the text by 1 and 2 1 . A power frequency puncture test on insulators in oil is specified in IEC 60383-1(1993) as a sample test. An impulse voltage punctur
22、e test on insulators in air is required and applied in more and more countries and by a growing number of utilities. The applied test procedures differed from each other considerably. The first edition of IEC 61211(1994) gave a common specification for an impulse over-voltage test as an alternative.
23、 That edition specified the test method and acceptance criteria, and also gave guidance for performing the test and for measuring the test voltage. CIGRE WG 33.03 has followed up the edition 1 since its publication in 1994. Information has been gathered on the usage of the technical report and on th
24、e development of test and measurement techniques for impulse voltage puncture withstand tests on insulators in air. In time, interest in this impulse puncture test on insulators in air has considerably increased. Based on follow-up by CIGRE WG 33.03, IEC subcommittee 36B (Insulators for overhead lin
25、es) decided to revise IEC 61211 with the aim to convert it into a standard. In this standard, the changes vis-vis the technical report are not dramatic. The main changes are related to using per unit values in the specification of test voltage, defining measurement uncertainty and improvements in th
26、e test procedure. In addition, minor clarifying changes have been made in the test assembly and in requirements for test voltage measuring systems. Unnecessary annexes have been deleted and replaced by a bibliography. In reference to the original motivation for the technical report and to gathered e
27、xperience, the importance of the peak voltage criterion in specifying the test voltage magnitude is stressed for achieving reproducibility of the test. The steepness criterion cannot be adopted, because with this the test voltage strongly depends on source impedance of the test circuit and on impuls
28、e front linearity. Further to peak value, the test procedure has to be specified in detail for reproducibility of the test. Polarity of the impulse related to the pin, starting polarity, possible polarity reversals and time interval between consecutive impulses may affect the severity of the test, a
29、nd hence have to be specified. It is clear that measurement of these short impulse voltages needs special attention to achieve an acceptable accuracy. IEC 60060 does not fully cover this topic. Consequently, special requirements and guidance for measurements are given in Annex B. This international
30、standard assumes that the manufacturer specifies the impulse puncture withstand voltage as a characteristic of the insulator unit. This voltage is defined as peak value of the measured voltage across the insulator in the actual test. Until such time as the relevant product standards give specified v
31、alues for the impulse puncture withstand voltage, this standard gives recommended test voltage values for different types of insulator units on the basis of per unit (p.u.) values. The puncture strength of insulators depends on both design and quality of manufacturing. Therefore both a type test and
32、 a sample test procedure are given. _ 1References in square brackets refer to the bibliography. Page4 EN61211:2005 INSULATORS OF CERAMIC MATERIAL OR GLASS FOR OVERHEAD LINES WITH A NOMINAL VOLTAGE GREATER THAN 1 000 V IMPULSE PUNCTURE TESTING IN AIR 1 Scope and object This International Standard dea
33、ls with impulse puncture testing in air of ceramic and glass insulator units of class B (see IEC 60383-1): cap and pin, pin type (including pin-post type) and class B long rod insulators. This standard may be applied also in tests on Class B insulators of other materials (e.g. polymers and composite
34、s). However, it may be useful to consider the possible need to adjust the test procedure accordingly. This standard is published with the object of specifying a standard procedure for impulse voltage puncture tests on insulators in air. Both type and sample test procedures are given. 2 Normative ref
35、erences 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 60050-471, International Electrotechn
36、ical Vocabulary Chapter 471: Insulators IEC 60060-1, High voltage test techniques Part 1: General definitions and test requirements IEC 60060-2, High voltage test techniques Part 2: Measuring systems IEC 60305, Insulators for overhead lines with a nominal voltage above 1 000 V Ceramic or glass insul
37、ator units for a.c. systems Characteristics of insulator units of the cap and pin type IEC 60383-1, Insulators for overhead lines with a nominal voltage above 1 000 V Ceramic or glass insulator units for a.c. systems Definitions, test methods and acceptance criteria IEC 61083-1, Instruments and soft
38、ware used for measurement in high-voltage impulse tests Part 1: Requirements for instruments 3 Terms and definitions For the purposes of this document, the definitions of IEC 60383-1 or IEC 60050(471) shall apply unless otherwise specified, as well as the following definitions. Page5 EN61211:2005 3.
39、1 impulse puncture withstand voltage specified peak voltage that the insulator withstands when applied according to this standard 3.2 test voltage actual peak voltage value determined by flashover of the applied impulse voltage 4 Abbreviations D divider G generator k coverage factor (according to IE
40、C 60060-2) U 5050 % flashover voltage at standard lightning impulse p.u. per unit relation of the test voltage and U 50 . 5 Impulse voltage puncture test on insulators in air 5.1 General requirements for the test Unless otherwise specified, IEC 60060-1, IEC 60060-2 and 60383-1 are applicable. The te
41、st specimen shall be clean and dry, and in thermal equilibrium with the surrounding environment before starting the test. 5.2 Mounting arrangements 5.2.1 General The mounting arrangement depends on the type of the insulator unit and on its possible integral metallic parts. The ground return conducto
42、r between the insulator and the divider shall be a plate. It is advisable to use a plate also in other parts of the ground return circuit. The test voltage shall be applied between the generator connector and ground return. 5.2.2 Cap and pin insulators Cap and pin insulators (Figure 1) shall be moun
43、ted with the cap towards an earthed plate whose smallest dimension is at least twice the diameter of the insulator to be tested. The distance from this plate to the insulator dielectric shall be as small as possible but sufficient to avoid direct flashover to the plate. On the pin side, a ball socke
44、t having approximately the same dimensions as the actual cap of the insulator shall be mounted to avoid electrical over- stress in the critical area at the level of the cement around the pin. The divider (D) and generator (G) shall be connected to this ball socket. A similar method shall be used for
45、 clevis and tongue type fittings. 5.2.3 Long rod insulators Long rod insulators (Figure 1) shall be mounted accordingly on an earthed plate. Rounded clevises having approximately the same diameter as the end fittings shall be mounted on both end fittings of the insulator to avoid electrical over-str
46、ess in the critical area at the level of the cement around the fitting. The divider and generator shall be connected accordingly. Page6 EN61211:2005 G D G D IEC 1498/04 Figure 1 Mounting arrangements of cap and pin and long rod insulators 5.2.4 Pin insulators Pin insulators (Figure 2) shall be mount
47、ed onto a supporting cross arm, which shall be a straight, smooth, earthed, metallic tube or structural member having a width not less than 76 mm and not more than 152 mm. It shall be placed on a grounded plate. Depending on the type of pin insulator, two mounting arrangements onto the supporting cr
48、oss arm are used. Page7 EN61211:2005 a) For pin insulators with the insulating component in service being supported without contact with the supporting structure: The test specimen shall be mounted on a metal pin approximately 25 mm in diameter of such length that the shortest dry-arcing distance fr
49、om the upper electrode and connected metallic parts to the supporting cross arm shall be 25 % to 50 % greater than the similar distance to the pin. The pin shall be coaxial with the test specimen. If the insulator has an integral pin, this shall be used. b) For pin insulators with the insulating component in service being in contact with the supporting structure (pin-post): The test specimen shall be attached d
