Technical Application Papers No.11 Guidelines to the ...

Technical Application Papers to the construction of a low-voltage assembly complying with the standards IEC 61439 Part 1 and Part 21 IndexTechnical Application PapersIntroduction ..31 standards on low-voltage assemblies and applicability The Standard IEC 61439 -1 ..42 Rated electrical characteris-tics of an assembly ..83 Classification of electrical Open-type and enclosed External design .. Installation conditions .. Functional classification ..114 Degree of protection IP of an assembly .. Degree of protection IP in ABB assemblies .. Degree of protection IP and installation environ-ment .. Degree of protection IP and temperature-rise Degree of protection IP of removable parts ..155 Degree of protection IK of Degree of protection IK in ABB assemblies ..166 Forms of internal separa-tions ..177 Verification of the temper-ature-rise limits inside Introduction .. Thermal verification of the assembly.

Guidelines to the construction of a low-voltage assembly complying with the Standards IEC 61439 Part 1 and Part 2 1 Standards on low voltage assemblies and applicability 1 Standards on low voltage assemblies and relevant applicability The recent publication of the new Standard IEC 61439 has imposed an evolution and a refinement of the con-

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