EN 60433:1998

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Insulators for overhead lines with a nominal voltage above 1kV - Ceramic insulators for a.c. systems - Characteristics of insulators units of the long rod type (IEC 60433:1998)Isolatoren für Freileitungen mit einer Nennspannung über 1 kV - Keramik-Isolatoren für Wechselspannungssysteme - Kenngrößen von Kettenisolatoren in LangstabausführungIsolateurs pour lignes aériennes de tension nominale supérieure à 1 kV - Isolateurs céramiques pour systèmes à courant alternatif - Caractéristiques des éléments de chaînes d'isolateurs à fût longInsulators for overhead lines with a nominal voltage above 1 kV - Ceramic insulators for a.c. systems - Characteristics of insulator units of the long rod type (IEC 60433:1998)29.240.20DaljnovodiPower transmission and distribution lines29.080.10IzolatorjiInsulatorsICS:Ta slovenski standard je istoveten z:EN 60433:1998SIST EN 60433:2000en01-februar-2000SIST EN 60433:2000SLOVENSKI
STANDARD
NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD60433Troisième éditionThird edition1998-08Isolateurs pour lignes aériennesde tension nominale supérieure à 1000 V –Isolateurs céramiques pour systèmesà courant alternatif –Caractéristiques des éléments de chaînesd’isolateurs à fût longInsulators for overhead lineswith a nominal voltage above 1000 V –Ceramic insulators for a.c. systems –Characteristics of insulator unitsof the long rod type Commission Electrotechnique Internationale International Electrotechnical
CommissionPour prix, voir catalogue en vigueurFor price, see current
catalogueÓ IEC 1998
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from the publisher.International Electrotechnical Commission3, rue de Varembé
Geneva, SwitzerlandTelefax: +41 22 919 0300e-mail: inmail@iec.ch IEC web site
http: //www.iec.chCODE PRIXPRICE CODEGSIST EN 60433:2000

60433 © IEC:1998– 3 –INTERNATIONAL ELECTROTECHNICAL COMMISSION____________INSULATORS FOR OVERHEAD LINESWITH A NOMINAL VOLTAGE ABOVE 1000 V –Ceramic insulators for a.c. systems –Characteristics of insulator units of the long rod typeFOREWORD1)The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprisingall national electrotechnical committees (IEC National Committees). The object of the IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields. Tothis end and in addition to other activities, the IEC publishes International Standards. Their preparation isentrusted to technical committees; any IEC National Committee interested in the subject dealt with mayparticipate in this preparatory work. International, governmental and non-governmental organizations liaisingwith the IEC also participate in this preparation. The IEC collaborates closely with the International Organizationfor Standardization (ISO) in accordance with conditions determined by agreement between the twoorganizations.2)The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, aninternational consensus of opinion on the relevant subjects since each technical committee has representationfrom all interested National Committees.3)The documents produced have the form of recommendations for international use and are published in the formof standards, technical reports or guides and they are accepted by the National Committees in that sense.4)In order to promote international unification, IEC National Committees undertake to apply IEC InternationalStandards transparently to the maximum extent possible in their national and regional standards. Anydivergence between the IEC Standard and the corresponding national or regional standard shall be clearlyindicated in the latter.5)The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for anyequipment declared to be in conformity with one of its standards.6)
Attention is drawn to the possibility that some of the elements of this International Standard may be the subjectof patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.International Standard IEC 60433 has been prepared by subcommittee 36B: Insulators foroverhead lines, of IEC technical committee 36: Insulators.This third edition cancels and replaces the second edition published in 1980 and constitutes atechnical revision.The text of this standard is based on the following documents:FDISReport on voting36B/180/FDIS36B/184/RVDFull information on the voting for the approval of this standard can be found in the report onvoting indicated in the above table.SIST EN 60433:2000

60433 © IEC:1998– 5 –INSULATORS FOR OVERHEAD LINESWITH A NOMINAL VOLTAGE ABOVE 1000 V –Ceramic insulators for a.c. systems –Characteristics of insulator units of the long rod type1
ScopeThis International Standard is applicable to string insulator units of the long rod type withinsulating parts of ceramic material intended for use in a.c. overhead power lines with anominal voltage greater than 1000 V and a frequency not greater than 100 Hz. It is alsoapplicable to insulators of similar design, used in substations.This standard is applicable to ceramic string insulator units of the long rod type, either with aclevis end fitting at both ends for coupling with a tongue, or with a socket end fitting at bothends for coupling with a pin ball.The object of this standard is to prescribe specified values for electrical and mechanicalcharacteristics, and for the principal dimensions of ceramic string insulator units of the longrod type.This standard is applicable to string insulator units for use on overhead lines situated in lightlypolluted areas, and the creepage distances given in table 1 have been established accordingly,using the IEC 60815 recommendation of 16 mm/kV for pollution level I. However, shortercreepage distances may be used in some non-polluted areas. If specific operating conditionsrequire or allow non-standard (longer or shorter) creepage distances, the mechanicalcharacteristics as well as the lengths L (see clause 4) of this standard should be used unlessthe need for exceptionally long creepage distances requires values of L greater than thosegiven in table 1. In the case of special requirements, e.g. very heavy polluted areas and forother particular or extreme environmental conditions, it may be necessary for certaindimensions to be changed.NOTES1
As far as reas
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