1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationSurge arrestersPart 8: Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kVBS EN 60099-8:2011Na
2、tional forewordThis British Standard is the UK implementation of EN 60099-8:2011. It is identical to IEC 60099-8:2011.The UK participation in its preparation was entrusted to Technical Committee PEL/37, Surge Arresters - High Voltage.A list of organizations represented on this committee can be obtai
3、ned on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011ISBN 978 0 580 63047 7 ICS 29.120.50; 29.240.10Compliance with a British Standard cannot confer immunity from legal obli
4、gations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2011.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60099-8:2011EUROPEAN STANDARD EN 60099-8 NORME EUROPENNE EUROPISCHE NORM April 2011 CENEL
5、EC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide
6、 for CENELEC members. Ref. No. EN 60099-8:2011 E ICS 29.240.10 English version Surge arresters - Part 8: Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kV (IEC 60099-8:2011) Parafoudres - Partie 8: Parafoudres oxyd
7、e mtallique avec clateur extrieur en srie (EGLA) pour lignes ariennes de transmission et de distribution de rseaux courant alternatif de plus de 1 kV (CEI 60099-8:2011) berspannungsableiter Teil 8: Metalloxid-berspannungsableiter mit externer Serienfunkenstrecke (EGLA) fr bertragungs- und Verteilung
8、sleitungen von Wechselstromsystemen ber 1 kV (IEC 60099-8:2011) This European Standard was approved by CENELEC on 2011-03-03. 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 standa
9、rd 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
10、 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, Bulgaria, Croatia, Cyprus, the Czec
11、h Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60099-8:2011EN 60099-8:2011 - 2 - F
12、oreword The text of document 37/370/FDIS, future edition 1 of IEC 60099-8, prepared by IEC TC 37, Surge arresters, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60099-8 on 2011-03-03. Attention is drawn to the possibility that some of the elements of this document
13、may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. 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 (do
14、p) 2011-12-03 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-03-03 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60099-8:2011 was approved by CENELEC as a European Standard without any modifica
15、tion. _ BS EN 60099-8:2011- 3 - EN 60099-8:2011 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 cit
16、ed applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD YearIEC 60060-1 1989 Hi
17、gh-voltage test techniques - Part 1: General definitions and test requirements HD 588.1 S11)191 IEC 60060-2 1994 High-voltage test techniques - Part 2: Measuring systems EN 60060-22)194 IEC 60068-2-11 1981 Environmental testing - Part 2-11: Tests - Test Ka: Salt mist EN 60068-2-11 1999 IEC 60068-2-1
18、4 2009 Environmental testing - Part 2-14: Tests - Test N: Change of temperature EN 60068-2-14 2009 IEC 60099-4 (mod) + A1 + A2 2004 2006 2009 Surge arresters - Part 4: Metal-oxide surge arresters without gaps for a.c. systems EN 60099-4 + A1 + A2 2004 2006 2009 IEC 60270 2000 High-voltage test techn
19、iques - Partial discharge measurements EN 60270 2001 IEC 60507 1991 Artificial pollution tests on high-voltage insulators to be used on a.c. systems EN 60507 1993 IEC/TS 60815-1 2008 Selection and dimensioning of high-voltage insulators intended for use in polluted conditions - Part 1: Definitions,
20、information and general principles - - IEC 62217 2005 Polymeric insulators for indoor and outdoor use with a nominal voltage 1 000 V - General definitions, test methods and acceptance criteria EN 62217 2006 ISO 3274 - Geometrical Product Specifications (GPS) - Surface texture: Profile method - Nomin
21、al characteristics of contact (stylus) instruments EN ISO 3274 - ISO 4287 - Geometrical Product Specifications (GPS) - Surface texture: Profile method - Terms, definitions and surface texture parameters EN ISO 4287 - 1) HD 588.1 S1 is superseded by EN 60060-1:2010, which is based on IEC 60060-1:2010
22、. 2) EN 60060-2 is superseded by EN 60060-2:2011, which is based on IEC 60060-2:2010. BS EN 60099-8:2011EN 60099-8:2011 - 4 - Publication Year Title EN/HD Year ISO 4892-1 - Plastics - Methods of exposure to laboratory light sources - Part 1: General guidance EN ISO 4892-1 - ISO 4892-2 - Plastics - M
23、ethods of exposure to laboratory light sources - Part 2: Xenon-arc lamps EN ISO 4892-2 - ISO 4892-3 - Plastics - Methods of exposure to laboratory light sources - Part 3: Fluorescent UV lamps EN ISO 4892-3 - BS EN 60099-8:2011 2 60099-8 IEC:2011 CONTENTS INTRODUCTION . 7 1 Scope . 8 2 Normative refe
24、rences . 8 3 Terms and definitions . 9 4 Identification and classification . 11 4.1 EGLA identification 11 4.2 EGLA classification . 12 5 Standard ratings and service conditions . 12 5.1 Standard rated voltages 12 5.2 Standard rated frequencies . 13 5.3 Standard nominal discharge currents 13 5.4 Ser
25、vice conditions . 13 5.4.1 Normal service conditions 13 5.4.2 Abnormal service conditions 13 6 Requirements . 13 6.1 Insulation withstand of the SVU and the complete EGLA . 13 6.1.1 Insulation withstand of the housing of the SVU 13 6.1.2 Insulation withstand of EGLA with shorted (failed) SVU . 13 6.
26、2 Residual voltages 14 6.3 High current duty . 14 6.4 Lightning discharge capability . 14 6.5 Short-circuit performance of the SVU 14 6.6 Mechanical performance . 14 6.7 Weather aging of SVU . 15 6.8 Reference voltage of the SVU . 15 6.9 Internal partial discharges . 15 6.10 Coordination between ins
27、ulator withstand and EGLA protective level 15 6.11 Follow current interrupting . 15 6.12 Electromagnetic compatibility 15 6.13 End of life 16 7 General testing procedure 16 7.1 Measuring equipment and accuracy 16 7.2 Test samples . 16 8 Type tests 16 8.1 General . 16 8.2 Insulation withstand tests o
28、n the SVU housing and on the EGLA with failed SVU 17 8.2.1 General . 17 8.2.2 Insulation withstand test on the SVU housing 17 8.2.3 Insulation withstand tests on EGLA with failed SVU . 18 8.3 Residual voltage tests . 19 8.3.1 General . 19 8.3.2 Procedure for correction and calculation of inductive v
29、oltages . 19 8.3.3 Lightning current impulse residual voltage test 20 BS EN 60099-8:201160099-8 IEC:2011 3 8.3.4 High current impulse residual voltage test . 21 8.4 Standard lightning impulse sparkover test . 21 8.5 High current impulse withstand test . 22 8.5.1 Selection of test samples . 22 8.5.2
30、Test procedure 22 8.5.3 Test evaluation 22 8.6 Lightning discharge capability test . 23 8.6.1 Selection of test samples . 23 8.6.2 Test procedure 23 8.6.3 Test parameters for the lightning impulse discharge capability test 23 8.6.4 Measurements during the lightning impulse discharge capability test
31、. 24 8.6.5 Rated lightning impulse discharge capability 24 8.6.6 List of rated charge values 24 8.7 Short-circuit tests 24 8.7.1 General . 24 8.7.2 Preparation of the test samples . 25 8.7.3 Mounting of the test sample . 26 8.7.4 High-current short-circuit tests . 27 8.7.5 Low-current short-circuit
32、test . 29 8.7.6 Evaluation of test results . 29 8.8 Follow current interrupting test 34 8.8.1 General . 34 8.8.2 “Test method A“ 34 8.8.3 “Test method B“ 36 8.9 Mechanical load tests on the SVU . 38 8.9.1 Bending test 38 8.9.2 Vibration test . 47 8.10 Weather aging tests 48 8.10.1 General . 48 8.10.
33、2 Sample preparation . 48 8.10.3 Test procedure 48 8.10.4 Test evaluation 48 8.10.5 Additional test procedure for polymer (composite and cast resin) housed SVUs. 48 9 Routine tests 49 9.1 General . 49 10 Acceptance tests 50 10.1 General . 50 10.2 Reference voltage measurement of SVU . 50 10.3 Intern
34、al partial discharge test of SVU 50 10.4 Radio interference voltage (RIV) test . 50 10.5 Test for coordination between insulator withstand and EGLA protective level 51 10.5.1 General . 51 10.5.2 Front-of-wave impulse sparkover test 51 10.5.3 Standard lightning impulse sparkover test . 51 10.6 Follow
35、 current interrupting test 52 10.6.1 General . 52 10.6.2 Test procedure 52 10.6.3 Test sequence . 52 BS EN 60099-8:2011 4 60099-8 IEC:2011 10.6.4 Test evaluation 52 10.7 Vibration test on the SVU with attached electrode . 52 10.7.1 Test procedure and test condition 53 10.7.2 Test evaluation 53 Annex
36、 A (informative) Example of a test circuit for the follow current interrupting test 54 Annex B (normative) Mechanical considerations 55 Bibliography 60 Figure 1 Configuration of an EGLA with insulator and arcing horn 7 Figure 2 Examples of SVU units . 32 Figure 3 Short-circuit test setup . 33 Figure
37、 4 Example of a test circuit for re-applying pre-failing circuit immediately before applying the short-circuit test current . 34 Figure 5 Thermo-mechanical test . 43 Figure 6 Example of the test arrangement for the thermo-mechanical test and direction of the cantilever load 44 Figure 7 Test sequence
38、 of the water immersion test 45 Figure A.1 Example of a test circuit for the follow current interrupting test . 54 Figure B.1 Bending moment Multi-unit SVU 55 Figure B.2 SVU unit . 57 Figure B.3 SVU dimensions . 58 Table 1 EGLA classification “Series X” and “Series Y“ 12 Table 2 Steps of rated volta
39、ges (r.m.s. values) 12 Table 3 Type tests (all tests to be performed without insulator assembly) 17 Table 4 Test requirements . 30 Table 5 Required currents for short-circuit tests . 31 Table 6 Acceptance tests . 50 Table 7 Virtual steepness of wave front of front-of-wave lightning impulses . 51 BS
40、EN 60099-8:201160099-8 IEC:2011 7 INTRODUCTION This part of IEC 60099 applies to the externally gapped line arrester (EGLA) This type of surge arrester is connected directly in parallel with an insulator assembly. It comprises a series varistor unit (SVU), made up from non-linear metal-oxide resisto
41、rs encapsulated in a polymer or porcelain housing, and an external series gap, see Figure 1. The purpose of an EGLA is to protect the parallel-connected insulator assembly from lightning-caused overvoltages. The external series gap, therefore, should spark over only due to fast-front overvoltages. T
42、he gap should withstand all power-frequency and slow-front overvoltages occurring on the system. In the event of SVU failure, the external series gap should be able to isolate the SVU from the system. S VU Insulator assembly (insulator assembly, with/without arcing horns or grading elements) Externa
43、l series gap (without an insulator in parallel) Series varistor unit Conductor Tower arm EGLA IEC 2896/10 Figure 1 Configuration of an EGLA with insulator and arcing horn BS EN 60099-8:2011 8 60099-8 IEC:2011 SURGE ARRESTERS Part 8: Metal-oxide surge arresters with external series gap (EGLA) for ove
44、rhead transmission and distribution lines of a.c. systems above 1 kV 1 Scope This part of IEC 60099 covers metal-oxide surge arresters with external series gap (externally gapped line arresters (EGLA) that are applied on overhead transmission and distribution lines, only to protect insulator assembl
45、ies from lightning-caused flashovers. This standard defines surge arresters to protect the insulator assembly from lightning-caused overvoltages only. Therefore, and since the metal-oxide resistors are not permanently connected to the line, the following items are not considered for this standard: s
46、witching impulse sparkover voltage; residual voltage at steep current and switching current impulse; thermal stability; long-duration current impulse withstand duty; power-frequency voltage versus time characteristics of an arrester; disconnector test; aging duties by power-frequency voltage. Consid
47、ering the particular design concept and the special application on overhead transmission and distribution lines, some unique requirements and tests are introduced, such as the verification test for coordination between insulator withstand and EGLA protective level, the follow current interrupting te
48、st, mechanical load tests, etc. Designs with the EGLAs external series gap installed in parallel to an insulator are not covered by this standard. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition
49、cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60060-1:1989, High-voltage test techniques Part 1: General definitions and test requirements IEC 60060-2:1994, High-voltage test techniques Part 2: Measuring systems IEC 60068-2-11:1981, Environmental testing Part 2: Tests. Test kA: Salt mist IEC 60068-2-14:2009, Environmental testing Part 2-14: Tests Test N:
