HD 528 S1:1989

HD 528 S1:1989 is a standardization document published by CLC. Its full title is "A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear". This standard covers: The following method is applicable to enclosed PTTA or partitioned sections of PTTA without forced ventilation. Notes 1. - The influence of the materials and wall thicknesses usually used for enclosures are negligible on the steady state temperatures. The method is therefore applicable to enclosures made of sheet steel, sheet aluminium, cast iron, insulating material and the liken 2. - For open-type and dead-front PTTA, no temperature-rise assessment is needed if it is obvious that no excessive air temperatures are likely to arise.

The following method is applicable to enclosed PTTA or partitioned sections of PTTA without forced ventilation. Notes 1. - The influence of the materials and wall thicknesses usually used for enclosures are negligible on the steady state temperatures. The method is therefore applicable to enclosures made of sheet steel, sheet aluminium, cast iron, insulating material and the liken 2. - For open-type and dead-front PTTA, no temperature-rise assessment is needed if it is obvious that no excessive air temperatures are likely to arise.

HD 528 S1:1989 has the following relationships with other standards: It is inter standard links to HD 528 S2:1997. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

HD 528 S1:1989 is associated with the following European legislation: EU Directives/Regulations: 2006/95/EC, 73/23/EEC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

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