1、BRITISH STANDARD BS EN 60437:1998 IEC 60437: 1997 Radio interference test on high-voltage insulators The European Standard EN60437:1997 has the status of a British Standard ICS 29.080.10BSEN 60437:1998 This British Standard, having been prepared under the directionof the Electrotechnical Sector Boar
2、d, was published underthe authority of the Standards Board and comes intoeffect on 15January1998 BSI 04-1999 ISBN 0 580 29443 9 National foreword This British Standard is the English language version of EN60437:1997. It is identical with IEC60437:1997. The UK participation in its preparation was ent
3、rusted to Technical Committee PEL/36, Insulators for power systems, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; mon
4、itor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. From 1January1997, all IEC publications have the number60000added to the old number. For instance, IEC27-1 has been r
5、enumbered as IEC60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative referenc
6、es to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “
7、Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from le
8、gal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated
9、in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN 60437:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 60437 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60437 October 1997 IC
10、S 29.080.10; 33.100 Descriptors: Radio-interference, insulators English version Radio interference test on high-voltage insulators (IEC 60437:1997) Essais de perturbation radiolectrique des isolateurs pour haute tension (CEI 60437:1997) Funkstrprfungen an Hochspannungsisolatoren (IEC 60437:1997) Thi
11、s European Standard was approved by CENELEC on 1997-10-01. 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 ref
12、erences 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
13、 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, P
14、ortugal, Spain, Sweden, Switzerland and United Kingdom. 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 1997 CENELEC All rights of
15、 exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN60437:1997 EEN 60437:1997 BSI 04-1999 2 Foreword The text of document36/150/FDIS, future edition2of IEC60437, prepared by IECTC36, Insulators, was submitted to the IEC-CENELEC parallel vote and was approved
16、 by CENELEC as EN60437 on 1997-10-01. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard,Annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC60437:1997 was approved
17、by CENELEC as a European Standard without any modification. Contents Page Foreword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Measurement frequency 3 5 Radio noise limits and test voltage 3 6 Measuring instruments 4 6.1 Standard CISPR measuring apparatus 4 6.2 Other measur
18、ing apparatus 4 7 Measuring circuit 4 8 Requirements for the test voltage 4 9 Atmospheric conditions 4 10 Test area 4 11 Arrangement of insulators for test 4 11.1 Mounting of insulators 4 11.2 Condition of insulators before test 5 12 Insulators for type test 5 12.1 Number of insulators 5 12.2 String
19、 insulator units 5 13 Procedure for type tests 5 13.1 Checking and calibration of test circuit 5 13.2 Voltage application and RI characteristics 5 13.3 Acceptance criterion 6 14 Procedure for sample tests 6 14.1 Insulators subject to sample tests 6 14.2 Number of samples 6 14.3 Mounting arrangement
20、6 14.4 Test procedure 6 14.5 Acceptance criterion 6 15 Test report 6 Annex ZA (normative) Normative references to international publications with their corresponding European publications Inside back cover latest date by which the EN has to be implemented at national level by publication of an ident
21、ical national standard or by endorsement (dop) 1998-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1998-07-01EN 60437:1997 BSI 04-1999 3 Introduction The first issue of IEC60437 presented the then available information on a radio interference tes
22、t on high-voltage insulators as a technical report. This allowed further experience in conducting the test and the interpretation of results to be gained. This second edition incorporates that experience. It presents, in the form of an International Standard, the recommended procedures for a radio i
23、nterference test on high-voltage insulators. 1 Scope This International Standard specifies the procedure for a radio interference (RI) test carried out in a laboratory on clean and dry insulators at a frequency of0,5MHz or1MHz or, alternatively, at other frequencies between0,5MHz and2MHz. In service
24、 the RI characteristics of an insulator may be modified by the ambient conditions, particularly rainfall and other moisture, and by pollution. It is not considered feasible to specify reproducible test conditions to simulate a range of ambient conditions. Hence only tests on clean and dry insulators
25、 are specified in this standard. NOTEThe effects of insulator surface conditions, including pollution, are presented in Amendment1of CISPR18-2. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this Internation
26、al Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the normative documents ind
27、icated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60050(471):1984, International Electrotechnical Vocabulary (IEV) Chapter471:Insulators. IEC 60060-1:1989, High-voltage test techniques Part 1: General definitions and test requirements. IEC 60137:
28、1995, Insulated bushings for alternating voltages above1 000 V. IEC 60168:1994, Tests on indoor and outdoor post insulators of ceramic material or glass for systems with nominal voltages greater than1 000 V. IEC 60383-1:1993, Insulators for overhead lines with a nominal voltage above1 000 V Part1:Gl
29、ass or ceramic insulator units for a.c. systems Definitions, test methods and acceptance criteria. IEC 60383-2:1993, Insulators for overhead lines with a nominal voltage above1 000 V Part2:Insulator strings and insulator sets for a.c. systems Definitions, test methods and acceptance criteria. CISPR
30、16-1:1993, Specification for radio disturbance and immunity measuring apparatus and methods Part 1: Radio disturbance and immunity measuring apparatus. CISPR 18-2:1986, Radio interference characteristics of overhead power lines and high-voltage equipment Part 2: Methods of measurement and procedure
31、for determining limits. Amendment 1 (1993) 3 Definitions For the purpose of this International Standard, the definitions given in IEC60050(471) and IEC60383-1 are applicable. 4 Measurement frequency Measurements of RI characteristics shall be made at a frequency of (0,5 0,05) MHz or (1,0 0,1) MHz or
32、 alternatively by agreement between purchaser and manufacturer at other frequencies between0,5MHz and2MHz. NOTEAlthough CISPR 18-2 gives the reference measurement frequency for the measurement of RI characteristics as0,5MHz, the existing standard practice in some countries is to use1MHz or2MHz when
33、measuring radio interference characteristics of insulators. The frequencies of0,5MHz or alternatively1MHz are preferred because, usually, the level of radio noise at this part of the spectrum is representative of the higher levels and also because0,5MHz lies between the low and medium frequency radi
34、o broadcast bands. The RI characteristics of insulators do not normally affect television broadcasts. 5 Radio noise limits and test voltage This standard does not specify a limiting value for the radio interference characteristic of insulators or the test voltage. When RI tests are required, the rel
35、evant values, depending on product or national regulations or specifications, shall be agreed between the purchaser and manufacturer. NOTEGuidance for establishing limit values is given in CISPR18-2, Amendment 1.EN 60437:1997 4 BSI 04-1999 6 Measuring instruments 6.1 Standard CISPR measuring apparat
36、us Unless otherwise agreed, the standard CISPR measuring apparatus, as specified in CISPR16-1,shall be used for all measurements of RI characteristics of insulators. 6.2 Other measuring apparatus By agreement between the purchaser and manufacturer measuring apparatus differing from the CISPR standar
37、d measuring apparatus may be used provided that conversion of the measurements to quasi peak values is possible. 7 Measuring circuit Laboratory measurements of radio noise shall be made by measuring the conducted quantities, either current or voltage. The relevant measuring circuits are specified in
38、 CISPR 18-2. The basic test circuit is shown in Figure 4 of CISPR18-2, and a practical form of standard test circuit in Figure 5. Depending on the distance between the measuring set and the test circuit, the arrangements shown in Figure 6 or Figure 7 of CISPR 18-2 may be incorporated into the test c
39、ircuit of Figure 5. 8 Requirements for the test voltage RI measurements shall be made with a power-frequency voltage applied to the test object. The test voltage and its method of measurement shall comply with the requirements of IEC60060-1. The radio noise level produced by the connections between
40、the transformer and test insulator shall be insignificant compared with the levels to be measured from the test object at the test voltage. 9 Atmospheric conditions The standard reference atmospheric conditions in accordance with IEC60060-1 are not applicable to radio interference tests. Tests made
41、in accordance with this standard shall be performed under atmospheric conditions complying with the following requirements: temperature between 10 C and 35 C pressure between 87kPa and 107kPa (870 mbar and 1 070 mbar) relative humidity between 45 % and 75 %. NOTE 1The absolute humidity and the atmos
42、pheric pressure can influence the test results. NOTE 2By agreement between the purchaser and manufacturer, e.g. to simulate service conditions, tests may be carried out under other atmospheric conditions. Examples of these include: temperature between 5 C and 40 C relative humidity between 20 % and
43、80 %. Correction to standard atmospheric conditions shall not be applied to either the test voltage or the radio interference measurements. The atmospheric conditions shall be recorded. 10 Test area Tests on smaller insulators and insulator sets preferably shall be performed inside a screened room w
44、hich is large enough to prevent the walls and floor having any significant effect on the distribution of the electric field at the surface of the test object. Circuits, for example power and lighting, entering the screened test area shall, ideally, be filtered so as to avoid the introduction of radi
45、o noise present in the general environment. When, for testing larger insulators and insulator sets, a suitable screened room is not available, the tests may be carried out at any place where the background noise level is sufficiently low compared with the levels to be measured. 11 Arrangement of ins
46、ulators for test 11.1 Mounting of insulators Insulators, including bushings, shall, when mounted for radio interference tests, be complete with any stress control devices and fittings specified by the manufacturer or the purchaser. They shall be mounted either in a standard method of mounting for el
47、ectrical tests or in a manner simulating service conditions. Test results are influenced, not only by the insulators, but also by the method of mounting and the presence of arcing horns, grading rings, conductor bundles and their position relative to the insulators. Hence a test configuration simula
48、ting service conditions shall be as representative as possible. NOTEAlthough measurements of the RI characteristics of an insulator are related to its service voltage, the standard methods of mounting are referenced to the requirements or otherwise, to switching impulse tests, since RI measurements
49、are usually made on insulators and insulator sets when they are mounted for other electrical tests, and service voltage is not normally a specified characteristic of an insulator. Pin insulators and line post insulators shall be mounted in accordance with the standard method of mounting given in clauses 29 and 31 of IEC60383-1. NOTECare should be taken to ensure that the high-voltage connection to pin and line post insulators is sufficiently secure to make a good contact with the porcelain or glass, thus ensuring freedom from
