Guia para a construção de um quadro eléctrico de baixa tensão conforme as normas IEC 61439, Parte 1 e Parte 2

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Guia para a construção de um quadro eléctrico de baixa tensão conforme as normas IEC 61439, Parte 1 e Parte 2

Publicado: 13 de setembro de 2013 · Categoria: Cadernos técnicos

Deste documento

Technical Application Papers No.11 Guidelines to the construction of a low-voltage assembly complying with the Standards IEC 61439 Part 1 and Part 2 Technical Application Papers Index Introduction................................................ 3 6 Forms of internal separations. ......................................................... 17 1 Standards on low-voltage assemblies and relevant ap- 7 Verification of the temperplicability ature-rise limits inside an assembly 1.1 The Std. IEC 61439-1................................ 4 2 Rated electrical characteristics of an assembly. .................... 8 3 Classification of electrical assemblies 7.1 Introduction..................................................... 18 7.2 Thermal verification of the assembly.............. 19 7.3 Calculation of temperature-rise in compliance with the Std. IEC 60890.................................. 22 7.4 Examples of temperature-rise calculation...... 26 3.1 Open-type and enclosed assemblies............. 10 3.2 External design............................................... 10 3.3 Conditions of installation................................. 10 3.4 Functional classification.................................. 11 8 Verification of performances under short-circuit conditions 4 Degree of protection IP of an assembly...................................... 12 8.2 Short-circuit current and suitability of the as- 8.1 Verification of short-circuit withstand strength.... 31 sembly to the...