Power loading of an installation: Difference between revisions
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To base the design simply on the arithmetic sum of all the loads existing in the installation would be extravagantly uneconomical, and bad engineering practice. | To base the design simply on the arithmetic sum of all the loads existing in the installation would be extravagantly uneconomical, and bad engineering practice. | ||
The aim of this chapter is to show how some factors taking into account the diversity (non simultaneous operation of all appliances of a given group) and utilization (e.g. an electric motor is not generally operated at its full-load capability, etc.) of all existing and projected loads can be assessed. | The aim of this chapter is to show how some factors taking into account the [[Estimation of actual maximum kVA demand#Factor of simultaneity (ks)|diversity]] (non simultaneous operation of all appliances of a given group) and [[Estimation of actual maximum kVA demand#Factor of maximum utilization (ku)|utilization]] (e.g. an electric motor is not generally operated at its full-load capability, etc.) of all existing and projected loads can be assessed. | ||
The values given are based on experience and on records taken from actual installations. In addition to providing basic installation-design data on individual circuits, the results will provide a global value for the installation, from which the requirements of a supply system (distribution network, MV/LV transformer, or generating set) can be specified. | The values given are based on experience and on records taken from actual installations. In addition to providing basic installation-design data on individual circuits, the results will provide a global value for the installation, from which the requirements of a supply system (distribution network, MV/LV transformer, or generating set) can be specified. | ||
Revision as of 11:29, 28 June 2012
In order to design an installation, the actual maximum load demand likely to be imposed on the power-supply system must be assessed.
To base the design simply on the arithmetic sum of all the loads existing in the installation would be extravagantly uneconomical, and bad engineering practice.
The aim of this chapter is to show how some factors taking into account the diversity (non simultaneous operation of all appliances of a given group) and utilization (e.g. an electric motor is not generally operated at its full-load capability, etc.) of all existing and projected loads can be assessed.
The values given are based on experience and on records taken from actual installations. In addition to providing basic installation-design data on individual circuits, the results will provide a global value for the installation, from which the requirements of a supply system (distribution network, MV/LV transformer, or generating set) can be specified.
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