Safety implications of the introduction of a specially tested assembly into the South African national standard for low-voltage assemblies.
| dc.contributor.advisor | Ijumba, Nelson Mutatina. | |
| dc.contributor.author | Bonner, Mark James. | |
| dc.date.accessioned | 2011-11-10T09:08:32Z | |
| dc.date.available | 2011-11-10T09:08:32Z | |
| dc.date.created | 2004 | |
| dc.date.issued | 2004 | |
| dc.description | Thesis (M.Sc.)-University of KwaZulu-Natal, Durban, 2004. | en |
| dc.description.abstract | Low-voltage switchgear and controlgear assemblies with a rated short-circuit withstand strength above 10 kA, are required, by law, to conform to the South African standard, SANS 1473-1 (Low Voltage Switchgear and Controlgear Assemblies: Part 1: Typetested, partially type-tested and specially tested assemblies with rated short-circuit withstand strength above lOkA). Standard SANS 1473-1 stipulates three categories of assemblies i.e. type-tested, partially type-tested and specially tested assemblies. The specially tested assembly is unique to the South African market, while the other two categories are stipulated in standard SANS IEC 60439-1 (Low Voltage Switchgear and Controlgear Assemblies: Part 1: Type-tested and partially type-tested assemblies), which is internationally accepted in many countries as the applicable low-voltage assembly standard. Standard SANS 1473-1 specifies seven type-tests for certification as a type-tested assembly (TTA), but specifies, at most, three type-tests for certification as a specially tested assembly (STA). The underlying purpose of a technical standard is to provide for the safety of people and property, with the purpose of the research being twofold: 1. To investigate if the testing requirements specified for a specially tested assembly (STA), in accordance with standard SANS 1473-1, are correctly applied, and do not pose any safety risks. 2. To investigate any safety risks that stem from the fact that four type-tests are excluded for verification as a specially tested assembly (STA), as opposed to the seven type tests required for verification as a type-tested assembly (TTA). The document highlights the technical inadequacies of an assembly that is certified as a STA, in accordance with standard SANS 1473-1, and the potential safety risks associated with this type of assembly classification. | en |
| dc.identifier.uri | http://hdl.handle.net/10413/4201 | |
| dc.language.iso | en | en |
| dc.subject | Electric switchgear. | en |
| dc.subject | Assembly line methods. | en |
| dc.subject | Manufacturing processes--Automation. | en |
| dc.subject | Manufacturing industries--South Africa. | en |
| dc.subject | Manufacturing industries--Quality control. | en |
| dc.subject | Theses--Electrical engineering. | en |
| dc.title | Safety implications of the introduction of a specially tested assembly into the South African national standard for low-voltage assemblies. | en |
| dc.type | Thesis | en |