1、 CENELEC ENab1325 95 m 3404583 0367547 9LT m BRITISH STANDARD Insulators for overhead lines with a nominal voltage above 1ooov- Ceramic or glass insulator units for d.c. systems - Definitions, test methods and I l l acceptance criteria The European Standard EN 61325 : 1995 has the status of a Britis
2、h Standard ICs 29.080.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 61325 : 1996 IEC 1325 : 1995 - CENELEC EN*bL325 95 3404583 0167548 85b 9 BS EN 61325 : 1996 Committees responsible for this British Standard The preparation of this British Standard was entrusted to
3、 Technical Committee PEIB6, Insulators for power systems, upon which the following bodies were represented Association of Consulting Engineers Association of Manufacturers Allied to the Electrical and Electronic Industry BEAMA Electrical Cable and Conductor Accessory Manufacturers Association Britis
4、h Industrial Ceramic Manufacturers Association British Railways Board Electricity Association Electrical and Electronic Insulation Association (BEAMA Ltd.) Overhead ilansmission Line Contractors (BEAMA Ltd.) hansmksion and Dislibution Association (BEAMA Ltd.) This British Standard, having been prepa
5、red under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1996 O BSI 1996 Amendments issued since publication Amd.No. IDate 1 Text affected The following BSI references relate to the work on this standa
6、rd: Committee reference PEU36 Draft for comment 92i32345 DC ISBN O 680 24966 2 CENELEC EN+bL325 95 = 3404583 OLb7549 792 BS EN 61325 : 1996 Contents Committees responsible Inside fiont cover National foreword ii Foreword 2 Text of EN 61325 4 O BSI 1996 1 CENELEC ENxb1325 95 9 3404583 03b7550 404 = B
7、S EN 61325 : 1996 National foreword This British Standard has been prepared by Technical Committee PEU36 and is the English language version of EN 61325 : 1995 Insulators for overhead lines with a nominal voltage above 1 O00 l? Ceramic or glass insulator units for d.c. systems. Definitions, test met
8、hods and acceptance criteria, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 1325 : 1995 published by the International Electrotechnical Commission (IEC). Cross-references Pubfication referred to IEC 50 (471) : 1984 HD 588.1 S1: 1991 (EC
9、60-1 : 1989) HD 474 S1: 1986 (Ec 120: 1984) IEC 305 : 1978 IEC 372 : 1984 IEC 1245 : 1993 IS0 1463 : 1982 IS0 2064 : 1980 IS0 2178 : 1982 Corresponding British Standard BS 4727 Glossarg of electrotechnical, power, telecommunication, electrs for overhead lines with a nominal voltage above 1 ooov Cera
10、mic or glass insulator units for d.c. systems Definitions, test methods and acceptance criteria (EC 1325 : 1995) Isolateurs pour lignes ariennes de tension nominale suprieure 1 O00 V Elments disolateurs en cramique ou en verre pour systmes courant continu Dfnitions, mthodes dessai et critres daccept
11、ation (IEC 1325 : 1995) (CE1 1325 : 1995) Isolatoren fr Freileitungen mit einer Nennspannung ber 1 O00 V Keramik- oder Glasisolatoren fur Gleichspannungssysteme Begnffe, PrfVerfahren und Annahmekriterien This European Standard was approved by CENELEC on 19950515. CENELEC members are bound to comply
12、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 Secret
13、ariat 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 th
14、e official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrot
15、echnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels Q 1995 Copyright reserved to CENELEC members Ref. No. EN 61325 : 1995 E - CENELEC ENrbL325 95 3404583 0367552 287 Page 2
16、EN 61325 : 1995 Foreword The text of document 36B(C0)112, future edition 1 of lEC 1325, prepared by SC 36B, Insulators for overhead lines, of IEC TC 36, Insulators, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61325 on 19950515. The following dates were fixed: - l
17、atest date by which the EN has to be implemented at national level by publication of an identical national standard or by latest date by which the national standards contlicting with the EN have to be withdrawn endorsement (dop) 1996-02-15 - (dow) 1996-02-15 Annexes designated normative are part of
18、the body of the standard. Annexes designated informative are given for information only. In this standard, annex ZA is normative and annexes A and B are informative. Annex ZA has been added by CENELEC. Contents Page 1 Scope 4 Section 1. General 2 Normative references 3 Definitions 5 6 Section 2. Ins
19、ulators 4 Insulator classes and type 10 5 Insulating materials 10 6 Specified characteristics and features 10 7 Identification of insuiators 11 of a d.c. insulator unit Section 3. Classifcation of tests, sampling rules and procedures 8 Classification of tests 12 8.1 me tests 12 8.2 Sample tests 8.3
20、Routinetests 12 12 9 Qualityassurance 13 10 Procedures for type and sample tests 13 10.1 Insulator selection for type tests 13 10.2 Sampling rules and procedures for sample tests 13 10.3 Retest procedure for the sample tests 14 page Section 4. Test procedures for electrical tests 11 General requirem
21、ents for high-voltage tests 15 12 Standard atmospheric conditions and correction factors for electrical tests 15 12.1 Standard reference atmosphere 15 12.2 Correction factors for atmospheric conditions 15 13 Mounting arrangements for electrical tests 16 14 Lightning impulse voltage tests 16 14.1 Tes
22、t procedure 16 14.2 Acceptance criteria 17 15 Dry d.c. voltage tests 17 15.1 Test procedure 17 15.2 Acceptance criteria 17 16 sF6 puncture withstand test 17 16.1 Test method 17 16.2 Acceptance criteria 18 17 Impulse overvoltage puncture withstand test 18 18 Ion migration test 18 18.1 Reference condi
23、tions used to calculate the expected charge 18 18.2 Test validity 18 18.3 Test procedure 19 18.4 Acceptance criteria 21 19 Electrical body resistance test 21 19.1 Test procedure 21 19.2 Acceptance criteria 21 20 Thermal runaway test 21 20.1 Duration 21 20.2 Procedure 21 20.3 Acceptance criteria 22 2
24、1 Routine electrical test 22 Section 5. Test procedures for mechanical and other tests 22 Verification of the dimensions 23 23 Electromechanical failing load test 23 23.1 Test procedure 23 23.2 Acceptance criteria 24 23.4 Coefficients for sample tests 24 23.3 Coefficient for type tests 24 O BSI 1996
25、 24 24.1 24.2 25 25.1 25.2 26 26.1 26.2 26.3 26.4 26.5 26.6 26.7 27 27.1 27.2 27.3 28 28.1 28.2 28.3 28.4 28.5 29 29.1 29.2 29.3 29.4 30 30.1 30.2 31 31.1 31.2 CENELEC EN*b1325 95 W 3404583 0167553 113 Page 3 EN 61325 : 1995 Mechanical fahg load test Test procedure Acceptance criteria Thermal-mechan
26、ical performance test Test procedure Acceptance criteria Residual mechanical strength test Previous tests Preparation of the test pieces Test procedure Test results Acceptance criteria for the type test Acceptance criteria for the sample test Comparison between type and sample test results Verificat
27、ion of the axial, radial and angular displacements Test procedure Acceptance criteria for cap and pin insulators Acceptance criteria for long rod insulators Verification of the locking system Conformity of the lockmg device Verification of locking Position of the locking device Procedure for the ope
28、ration test Acceptance criteria for the operation test Temperature cycle test Test procedure for string insulator units composed of ceramic material Special test procedure for insulators with thick sections or very laxge insulators Complementary specifications Acceptance criteria Thermal shock test
29、Test procedure Acceptance criteria Porosity test Test procedure Acceptance criteria 25 25 25 26 26 26 26 26 26 27 27 27 27 27 28 28 28 28 29 29 29 29 30 30 30 30 31 31 32 32 32 32 32 32 32 32 32.1 32.2 33 33.1 33.2 34 35 35.1 35.2 35.3 36 Galv- test Test procedures Acceptance criteria Routine visual
30、 inspection Insulators with ceramic insulating Pd Insulators with gim insulating parts Routine mechanical test Zinc sleeve test General requirements concerning the zinc sleeve Qpe test procedure Sample test procedure Zinc cok test 36.1 36.2 Section 6. Tests on string insulator units 37 General Table
31、s Figures Annexes A Method of comparison of the results of the electromechamical or mechanical fading load type and sample tests B Bibliography ZA (normative) Normative references to international publications with their corresponding European publications General requirements for zinc collar Qpe an
32、d sample test procedure Page 32 33 33 34 34 35 35 36 36 36 36 36 36 37 37 38 42 45 46 47 O BSI 1996 CENELEC EN*b3325 95 3404583 0367554 05T = Page 4 EN 61325 : 1995 INSULATORS FOR OVERHEAD LINES WITH A NOMINAL VOLTAGE ABOVE 1 O00 V - Ceramic or glass insulator units for d.c. systems - Definitions, t
33、est methods and acceptance criteria Section 1 : General 1 Scope This International Standard is applicable to string insulator units of ceramic material or glass for use on d.c. overhead power lines with a nominal voltage greater than 1 000 V. It is not applicable to composite insulators. The applica
34、tion of this standard to insulators for use in other situations under d.c. voltage will be left to the relevant technical committees. This standard specifies: - the characteristics of insulators; - the conditions under which the specified values of these characteristics shall be verified; - acceptan
35、ce criteria. It specifies basic characteristic tests in a manner similar to that of IEC 383-1. Certain additional tests have been found to be necessary to ensure satisfactory long-term performance of d.c. insulators. At present, these additional tests concern only cap and pin insulators. In view of
36、the lack of significant performance data regarding long rod insulators on d.c. lines, it is not possible at present to define or validate special d.c.-oriented tests for such insulators. This standard does not include requirements, or special tests, dealing with the choice of insulators for specific
37、 operating conditions (.9. ageing arising from specific operating conditions). NOTES 1 This standard does not include radio interference tests, artificial pollution tests or tests on insulator sets. These subjects and some relevant test methods are dealt with in the following IEC Publications: IEC 3
38、83-2, IEC 437 and IEC 1245. 2 Many of the requirements and tests in this standard are relevant to insulators for use on d.c. traction lines, but other tests may be required. Reference can be made to IEC 383-1. CENELEC EN+b1325 95 3404583 O1b7555 Tqb W Page 5 EN 61325 : 1995 2 Normative references Th
39、e following normative documents contain provisions which, through reference in this text, constitute provisions of this International 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 Inte
40、rnational Standard are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 50(471): 1984, International Electrotechnical Vocabulary (IEV) -
41、Chapter 471: Insulators IEC 60-1 : 1989, High-voltage test techniques - General definitions and test reqqirements IEC 120: 1984, Dimensions of ball and socket couplings of string insulator units IEC 305: 1978, Characteristics of string insulator units of the cap and pin type IEC 372: 1984, Locking d
42、evices for ball and socket couplings of string insulator units - Dimensions and tests IEC 383-1 : 1993, Insulators for overhead lines with a nominal voltage above 1 O00 V - Part 1; Ceramic or glass insulator units for a.c. systems - Definitions, test methods and acceptance criteria IEC 433: 1980, Ch
43、aracteristics of string insulator units of the long rod type IEC 471 : 1977, Dimensions of clevis and tongue couplings of string insulator units IEC 797: 1984, Residual strength of string insulator units of glass or ceramic material for overhead lines after mechanical damage to the dielectric IEC 12
44、1 1 : 1994, Insulators of ceramic material or glass for overhead lines with a nominal voltage greater than 1 000 V - Puncture testing IEC 1245: 1993, Artificial pollution tests on high-voltage insulators to be used on d.c. systems IS0 1459: 1973, Metallic coatings - Protection against corrosion by h
45、ot dip galvanizing - Guiding principles IS0 1460: 1992, Metallic coatings - Hot dip galvanized coatings on ferrous metals - Gravimetric determination of the mass per unit area IS0 1461 : 1973, Metallic coatings - Hot dip galvanized coatings on fabricated ferrous products - Requirements IS0 1463: 198
46、2, Metallic and oxide coatings - Measurement of coating thickness - Microscopical method - CENELEC ENabl1325 95 H 3404583 03b755b 922 H Page 6 EN 61325 : 1995 IS0 2064: 1980, Metallic and other non-organic coatings - Definitions and conventions concerning the measurement of thickness IS0 2178: 1982,
47、 Non-magnetic coatings on magnetic substrates - Measurement of coating thickness - Magnetic method 3 Definitions For the purpose of this International Standard the following definitions apply. The term “insulator“ is used in this standard to refer to the object being tested. The definitions given be
48、low are those which either do not appear in IEC 50(471) or differ from those given in IEC SO(471). 3.1 Insulator string One or more connected string insulator units intended to give flexible support to overhead line conductors and stressed mainly in tension. 3.2 Lot A group of insulators offered for
49、 acceptance from the same manufacturer, of the same design and manufactured under presumed similar conditions of production. One or more lots may be offered together for acceptance: the lot) offered may consist of the whole, or part, of the quantity ordered. 3.3 Flashover A disruptive discharge external to the insulator, connecting those parts which normally have the operating voltage between them. NOTE - The term flashover“ used in this standard includes a flashover across the insulator surface as well as disruptive discharge
