IEC 60664-4-ed.2.0

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Označenie: IEC 60664-4-ed.2.0

Dátum vydania: 15.09.2005

Stránok: 135

Krajina: Medzinárodná technická norma

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IEC 60664-4:2005 Deals with basic, supplementary and reinforced insulation subjected to high-frequency voltage stress within low-voltage equipment. The dimensioning values directly apply for basic insulation; for reinforced insulation additional requirements apply according to Part 1. It is applicable for the dimensioning of clearances, creepage distances and solid insulation stressed by any type of periodic voltages with a fundamental frequency above 30 kHz and up to 10 MHz. This part of IEC 60664 can only be used together with IEC 60664-1 or with IEC 60664-5 (in this standard called Part 1 or Part 5). By using Part 1 or Part 5 together with this part the frequency limit of Part 1 or Part 5 is extended to frequencies higher than 30 kHz. This part also applies to Part 3 for frequencies greater than 30 kHz and protection of type 1. For type 2 protection this question is under consideration. Applies to equipment for use up to 2 000 m above sea level having a rated voltage up to a.c. 1 000 V. Specifies the requirements for clearances, creepage distances and solid insulation for equipment based upon their performance criteria. lt includes methods of electric testing with respect to insulation coordination. The minimum clearances specified in this part do not apply where ionized gases occur. Special requirements for such situations may be specified at the discretion of the relevant technical committee. This part does not deal with distances - through liquid insulation, - through gases other than air, - through compressed air. The object of this standard is to guide technical committees responsible for different equipment in order to rationalise their requirements so that insulation coordination is achieved when specifying clearances in air, creepage distances and solid insulation for equipment. The major changes made during the revision of IEC 60664-4 were the following: - inclusion of more recent information about the withstand characteristics of insulation at high-frequency voltage stress (see Annexes A, B and C); - inclusion of requirements for the dimensioning of clearances at high-frequency voltage stress (see Clause 4); - inclusion of requirements for the dimensioning of creepage distances at high-frequency voltage stress (see Clause 5); - inclusion of requirements for the dimensioning of solid insulation at high-frequency voltage stress (see Clause 6); - inclusion of diagrams to provide guidance on dimensioning with respect to high-frequency voltage stress (see Annex F); specification of tests with respect to high-frequency voltage stress (see Clause 7); - inclusion of test circuits for high-frequency voltage withstand testing and partial discharge testing (see Annex D.1 and D.2.1); - inclusion of design criteria for partial discharge test circuits at high-frequency voltage (see Annex D.2.2); - inclusion of criteria for dealing with non sinusoidal voltage stress (see Clause 8 and Annex E). IEC 60664-4:2005 Traite de lisolation principale, de lisolation supplementaire et de lisolation renforcee soumises a des contraintes de tension a haute frequence dans les materiels a basse tension. Les valeurs de dimensionnement sappliquent directement a lisolation principale; pour lisolation renforcee, des exigences supplementaires sappliquent, conformement a la Partie 1. Elle est applicable pour le dimensionnement des distances disolement, des lignes de fuite et de lisolation solide subissant des contraintes par tout type de tensions periodiques avec une frequence fondamentale superieure a 30 kHz et pouvant atteindre 10 MHz. La presente partie de la CEI 60664 ne peut etre utilisee que conjointement a la CEI 60664-1 ou a la CEI 60664-5 (intitulees Partie 1 ou Partie 5 dans la presente norme). En utilisant la Partie 1 ou la Partie 5 conjointement a la presente partie, la limite de frequence de la Partie 1 ou de la Partie 5 est etendue a des frequences superieures a 30 kHz. La presente partie sapplique egalement a la Partie 3 pour les frequences superieures a 30 kHz et la protection de type 1. Pour la protection de type 2, cette question est a letude. Sapplique aux materiels utilises jusqua 2 000 m au-dessus du niveau de la mer, ayant une tension assignee ne depassant pas 1 000 V en courant alternatif. Definit les exigences pour des distances disolement, des lignes de fuite et de lisolation solide des materiels, basees sur leurs criteres de performance. Elle comprend les methodes dessais dielectriques en tenant compte de la coordination de lisolement. Les distances disolement minimales specifiees dans la presente partie ne sappliquent pas en presence de gaz ionises. Les exigences particulieres dans de telles conditions peuvent etre specifiees par les comites detudes appropries, comme ils lentendent. La presente partie ne traite pas des distances - a travers lisolation liquide, - a travers les gaz autres que lair, - a travers lair comprime. Lobjet de la presente norme est de guider les comites detudes responsables de materiels differents, de maniere a rationaliser leurs specifications, afin de realiser la coordination de lisolement lorsque les distances disolement dans lair, les lignes de fuite et lisolation solide des materiels sont specifiees. Les modifications majeures effectuees au cours de la revision de la CEI 60664-4 ont ete les suivantes: - inclusion dinformations plus recentes concernant les caracteristiques de tenue de lisolation a des contraintes de tension a haute frequence (voir Annexes A, B et C); - inclusion dexigences pour le dimensionnement des distances disolement a des contraintes de tension a haute frequence (voir Article 4); - inclusion dexigences pour le dimensionnement des lignes de fuite a des contraintes de tension a haute frequence (voir Article 5); - inclusion dexigences pour le dimensionnement de lisolation solide a des contraintes de tension a haute frequence (voir Article 6); - inclusion de schemas pour fournir des lignes directrices su