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Insulators—Porcelain and glass for overhead power lines—Voltages greater than 1000 V a.c. Part 1: Test methods— Insulator units
AS/NZS 2947.1:1999 This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee EL/10, Overhead Lines. It was approved on behalf of the Council of Standards Australia on 7 December 1998 and on behalf of the Council of Standards New Zealand on 26 November 1998. It was published on 5 March 1999.
The following interests are represented on Committee EL/10: Australasian Railway Association Australian Chamber of Commerce and Industry Australian Electrical and Electronic Manufacturers Association Electricity Engineers Association of New Zealand Electricity Supply Association of Australia
Review of Standards. To keep abreast of progress in industry, Joint Australian/ New Zealand Standards are subject to periodic review and are kept up to date by the issue of amendments or new editions as necessary. It is important therefore that Standards users ensure that they are in possession of the latest edition, and any amendments thereto. Full details of all Joint Standards and related publications will be found in the Standards Australia and Standards New Zealand Catalogue of Publications; this information is supplemented each month by the magazines ‘The Australian Standard’ and ‘Standards New Zealand’, which subscribing members receive, and which give details of new publications, new editions and amendments, and of withdrawn Standards. Suggestions for improvements to Joint Standards, addressed to the head office of either Standards Australia or Standards New Zealand, are welcomed. Notiﬁcation of any inaccuracy or ambiguity found in a Joint Australian/New Zealand Standard should be made without delay in order that the matter may be investigated and appropriate action taken.
Originated as part of AS C67 — 1939 and AS C67 Supplement 1 — 1947. Previous edition, in part, AS 2947.1 — 1989. AS 2947.1 — 1989 jointly revised and designated, in part, as AS/NZS 2947.1:1999.
This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee EL/10, Overhead Lines, to supersede, in part, AS 2947.1 — 1989, Insulators — Porcelain and glass for overhead power lines — Voltages greater than 1000 V a.c., Part 1: Test methods. This Standard is based on but not equivalent to, and has been reproduced from, IEC 60383-1:1993, Insulators for overhead lines with a nominal voltage above 1000 V, Part 1: Ceramic or glass insulator units for a.c. systems — Definitions, test methods and acceptance criteria. In January 1997, IEC commenced numbering its Standards from 60000 by adding 60000 to the number of each existing Standard. This coordinates IEC numbering with ISO numbering. During the transition period an IEC Standard might be identified by its new number (e.g. IEC 60050 or IEC 50).
This Standard is Part 1 of a series covering porcelain and glass insulators for overhead power lines with voltages greater than 1000 V a.c. which, when complete, will be as follows: Part Part Part Part 1: 2: 3: 4: Test methods — Insulator units (this Standard) Characteristics Couplings Test methods — Insulator strings and insulator sets
The objective of this Standard is to provide users and manufacturers of porcelain and glass insulators for overhead lines with definitions of terms, requirements and acceptance criteria to facilitate the specifications of insulator units. The terms ‘normative’ and ‘informative’ have been used in this Standard to define the application of the annex to which they apply. A ‘normative’ annex is an integral part of a Standard, whereas an ‘informative’ annex is only for information and guidance. For the purposes of this Standard the source text is modified as follows: (a) (b) (c) The source text is amended, supplemented or replaced as set out in Annex ZZ. In the source text, ‘this part of IEC 383’ should read ‘this Australian/New Zealand Standard’. A full point should substitute for a comma when referring to a decimal marker.
Sections 1 to 5 of this Standard contain general requirements and relevant test procedures. Sections 6 to 9 cover five different types of insulators, as follows: Section 6: Pin insulators and shackle insulators. Section 7: Line post insulators. Section 8: String insulator units. Section 9: Insulators for overhead electric traction lines. Sections 6, 7 and 8 each contains a cross-reference table giving the tests applicable to the insulators and the quantity of insulators to be tested. Section 9, dealing with traction insulators, does not have a cross-reference table as traction insulators can be referenced to one of the three other types of insulator dealt with by this Standard. The user of this Standard need only refer to the Section dealing with the type of insulator to be tested and to the general requirements and relevant test procedures contained in Sections 1 to 5.
References to International Standards should be replaced by equivalent Australian or Joint Australian/New Zealand Standards as follows: Reference to International Standard IEC 60050(471) International Electrotechnical Vocabulary (IEV) Chapter 471: Insulators 60060 High-voltage test techniques 60060-1 Part 1: General definitions and test requirements
Australian or Joint Australian/New Zealand Standard AS 1852 International Electrotechnical Vocabulary 1852.471 Chapter 471: Insulators High voltage testing techniques Part 1: General definitions, test requirements, test procedures and measuring devices Insulators — Porcelain and glass for overhead power lines — Voltages greater than 1000 V a.c. Part 3: Couplings Insulators — Porcelain and glass for overhead power lines — Voltages greater than 1000 V a.c. Part 2: Characteristics Insulators — Porcelain and glass for overhead power lines — Voltages greater than 1000 V a.c. Part 3: Couplings Insulators — Porcelain and glass for overhead power lines — Voltages greater than 1000 V a.c. Part 2: Characteristics Insulators — Porcelain and glass for overhead power lines — Voltages greater than 1000 V a.c. Part 3: Couplings Insulators — Porcelain and glass for overhead power lines — Voltages greater than 1000 V a.c. Part 2: Characteristics
1931 1931.1
2947.3 60305 Characteristics of string insulator units of the cap and pin type 2947
2947.2 60372 Locking devices for ball and socket couplings of string insulator units: Dimensions and tests Characteristics of string insulator units of the long rod type 2947
2947.3 60433 2947
2947.2 60471 Dimensions of clevis and tongue couplings of string insulator units 2947
2947.3 60720 Characteristics of line post insulators 2947
2947.2 60797 Residual strength of string insulator units of glass or ceramic material for overhead lines after mechanical damage of the dielectric Guide for the selection of insulators in respect of polluted conditions —
IEC 61325 Insulators for overhead lines with a nominal voltage above 1000 V — Ceramic or glass insulator units for d.c. systems — Definitions, test methods and acceptance criteria AS —
TR1211 Insulators of ceramic material or glass for overhead lines with a nominal voltage greater than 1000 V — Puncture testing ISO 1459
Metallic coatings — Protection against corrosion by hot dip galvanizing — Guiding principles Metallic coatings — Hot dip galvanized coatings on ferrous materials — Determination of the mass per unit area — Gravimetric method Metallic coatings — Hot dip galvanized coatings on fabricated ferrous products — Requirements Metallic and oxide coatings — Measurement of coating thickness — Microscopical method Metallic and other non-organic coatings — Definitions and conventions concerning the measurement of thickness Non-magnetic coatings on magnetic substrates — Measurement of coating thickness — Magnetic method
Hot-dip galvanized coatings on threaded fasteners (ISO metric coarse thread series) Hot-dip galvanized coatings on threaded fasteners (ISO metric coarse thread series) Hot-dip galvanized coatings on threaded fasteners (ISO metric coarse thread series)
The following documents are also referred to in this Standard: AS 1650 4436 Hot-dipped galvanized coatings on ferrous articles Guide for the selection of insulators in respect of polluted conditions
STANDARDS AUSTRALIA / STANDARDS NEW ZEALAND
1 2 3 3 3 4 4 4 4 4 4 4 4 4 5 5 5 5 5
Scope and object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 3.2 3.3 Insulator string . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin insulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Line post insulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Traction insulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flashover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dry lightning impulse withstand voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 % dry lightning impulse flashover voltage . . . . . . . . . . . . . . . . . . . . . . . . Wet power-frequency withstand voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . Electromechanical failing load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical failing load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Puncture voltage 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Creepage distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Displacements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Short standard string . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Specified characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 2: Insulators
3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16
Classification, types of insulators and insulating materials . . . . . . . . . . . . . . . . . . . 4.1 4.2 4.3 Insulator classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Insulator types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Insulating materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification of insulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 3 - Classification of tests, sampling rules and procedures
Classification of tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1 6.2 6.3 Type tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Routine tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sample tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Quality assurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Insulator selection for type tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Sampling rules and procedures for sample tests . . . . . . . . . . . . . . . . 9 Re-test procedure for sample tests . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Procedures for type and sample tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 8.1 8.2 8.3
Section 4: Test procedures for electrical tests General requirements for high voltage tests . . . . . . . . . . . . . . . . . . . . . . . 10
10 Standard atmospheric conditions and correction factors for electrical tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 10.1 Standard reference atmosphere . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 10.2 Correction factors for atmospheric conditions . . . . . . . . . . . . . . . . . 11 11 Artificial rain parameters for wet tests . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 12 Mounting arrangements for electrical tests . . . . . . . . . . . . . . . . . . . . . . . . 11 13 Lightning impulse voltage tests (type test) . . . . . . . . . . . . . . . . . . . . . . . . 11 13.1 Test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 13.2 Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 14 Wet power-frequency voltage tests (type test) . . . . . . . . . . . . . . . . . . . . . 12 14.1 Test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 14.2 Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 15 Puncture withstand test (sample test, for class B insulators only) . . . . . . . 13 15.1 Power-frequency puncture withstand test . . . . . . . . . . . . . . . . . . . . 13 15.2 Impulse overvoitage puncture withstand test . . . . . . . . . . . . . . . . . . 14 16 Routine electrical test (only on class B insulators of ceramic material or annealed glass) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Section 5: Test procedures for mechanical and other tests 17 Verification of the dimensions (type and sample test) . . . . . . . . . . . . . . . . 15 18 Electromechanical failing load test (type and sample test) . . . . . . . . . . . . 15 18.1 Test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 18.2 Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 19 Mechanical failing load test (type and sample test) . . . . . . . . . . . . . . . . . . 16 19.1 Test procedure for pin and line post insulators . . . . . . . . . . . . . . . . 16 19.2 Test procedure for string insulator units . . . . . . . . . . . . . . . . . . . . . 16 19.3 Acceptance criteria for pin insulators . . . . . . . . . . . . . . . . . . . . . . . 16 19.4 Acceptance criteria for string insulator units and line post insulators . 17
Test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Acceptance criteria for cap and pin insulators . . . . . . . . . . . . . . . . . . . . . . 19 Acceptance criteria for long rod insulators . . . . . . . . . . . . . . . . . . . . . . . . . 20 Conformity of the locking device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Verification of locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Position of the locking device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Procedure for the operation test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Acceptance criteria for the operation test . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Temperature cycle test (sample test) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Test procedure for string insulator units, pin insulators and line post insulators composed of ceramic material . . . . . . . . . . . . . . . . . . . 22 Test procedure for string insulator units, pin insulators and line post insulators composed of annealed glass . . . . . . . . . . . . . . . . . . . . 22 Special test procedure for insulators with thick sections or very large insulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Complementary specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Test procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 26.1.1 Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 26.1.2 Determination of the coating mass by the magnetic test method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Thermal-mechanical performance test (type test) . . . . . . . . . . . . . . . . . . . . . . . . . 18 20.1 20.2
Verification of the axial, radial and angular displacements (sample test) . . . . . . . . 19 21.1 21.2 21.3
Verification of the locking system (sample test) . . . . . . . . . . . . . . . . . . . . . . . . . . 20 22.1 22.2
22.3 22.4 22.5 23 23.1 23.2 23.3 23.4 23.5 24 24.1 24.2 25 25.1 25.2 26 26.1
Thermal shock test (sample test) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Porosity test (sample test) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Galvanizing test (sample test) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 26.2.1 Acceptance criteria for the appearance test . . . . . . . . . . . . . . . . . . 25 26.2.2 Acceptance criteria for the value of coating mass . . . . . . . . . . . . . . 26
Routine visual inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 27.1 27.2 Insulators with ceramic insulating parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Insulators with glass insulating parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Routine mechanical test on line post insulators . . . . . . . . . . . . . . . . . . . . . 27 Routine mechanical test on string insulator units . . . . . . . . . . . . . . . . . . . . 28
Routine mechanical test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 28.1 28.2
Section 6: Pin Insulators
Standard mounting arrangement for electrical tests . . . . . . . . . . . . . . . . . . 29 Mounting arrangements for electrical tests reproducing service conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Mounting arrangement for the mechanical failing load test . . . . . . . . . . . . . 30
Mounting arrangements for tests on pin insulators . . . . . . . . . . . . . . . . . . . . . . . . 29 29.1 29.2 29.3
Section 7: Line post Insulators Coefficients for statistical analysis of the test results online post insulators . . . . . . 31 30.1 30.2 Coefficient for type tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Coefficients for sample tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Standard mounting arrangement for electrical tests . . . . . . . . . . . . . . . . . . 32 Mounting arrangements for electrical tests reproducing service conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Mounting arrangement for the mechanical failing load test . . . . . . . . . . . . . 33
Mounting arrangements for tests on line post insulators . . . . . . . . . . . . . . . . . . . . 32 31.1 31.2 31.3
Section 8: String insulator units Prescriptions concerning type tests on string insulators . . . . . . . . . . . . . . . . . . . . 34 32.1 32.2 Electrical type tests on string insulators . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Mechanical type tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Coefficients for statistical analysis of the test results on string insulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 33.1 33.2 Coefficient for type tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Coefficients for sample tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Mounting arrangements for electrical tests on string insulator units . . . . . . . . . . . . 37 Section 9: Insulators for overhead electric traction lines Mounting arrangements for electrical tests on insulators for overhead electric traction lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 35.1 35.2 Standard mounting arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Mounting arrangement representing service conditions . . . . . . . . . . . . . . . . 38
Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Annexes A B C Method of comparison of the results of electromechanical or mechanical type and sample tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Illustration of the mechanical and electromechanical test acceptance procedure for string insulator units and line post insulators . . . . . . . . . . . . . . . . . . 43 List of normative documents given for information . . . . . . . . . . . . . . . . . . . . . . . . 49
Annex ZZ Variations to IEC 60383-1 for application in Australia and New Zealand . . . 51
AS/NZS 2947.1:1999, Insulators - Porcelain and glass for overhead power lines - Voltages greater than 1000 V a.c. Test methods - Insulator units
As NZS 2947.1-1999 Insulators - Porcelain and Glass for Overhead Power Lines - Voltages Greater Than 1000 v A by SAI Global - APAC16 viewsEmbedDownloadDescriptionStandards Preview PDFs from SAI Global InfoStoreStandards Preview PDFs from SAI Global InfoStoreCategories: Types, Business/LawRead on Scribd mobile: iPhone, iPad and Android.Copyright: Attribution Non-Commercial (BY-NC)Download as PDF, TXT or read online from ScribdFlag for inappropriate contentShow moreShow less
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