Chapter A General rules of electrical installation design

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D24 © Schneider Electric - all rights reserved D - MV & LV architecture selection guide Characteristic to be considered Configuration 7 Choice of architecture details For the different possible configurations, the most probable and usual set of characteristics is given in the following table: Radial Two-pole Sheddable load Interconnected switchboards Site topology Any Any Any 1 level 5 to 25000m² Schneider Electric - Electrical installation guide 2008 Ring Double-ended 1 level 5 to 25000m² Location latitude Any Any Any Medium of high Medium or high Any Maintainability Minimal Standard Minimal Standard Standard Enhanced Power demand < 2500kVA Any Any ≥ 1250kVA > 2500kVA Any Load distribution Localized loads Localized loads Localized load Intermediate or uniforme distribution Interruptions sensitivity Long interruption acceptable Long interruption acceptable Sheddable Long interruption acceptable Any Uniform distribution Localized loads Long interruption acceptable Short or no interruption Disturbances sensitivity Low sensitivity High sensitivity Low sensitivity High sensitivity High sensitivity High sensitivity Other constraints / / / / / Double-ended loads
D - MV & LV architecture selection guide 8 Choice of equipment The choice of equipment is step 3 in the design of an electrical installation. The aim of this step is to select equipment from the manufacturers’ catalogues. The choice of technological solutions results from the choice of architecture. List of equipment to consider: b MV/LV substation, b MV switchboards, b Transformers, b LV switchboards, b Busbar trunking, b UPS units, b Power factor correction and filtering equipment. Criteria to consider: b Atmosphere, environment, b Service index, b Offer availability per country, b Utilities requirements, b Previous architecture choices. The choice of equipment is basically linked to the offer availability in the country. This criterion takes into account the availability of certain ranges of equipment or local technical support. The detailed selection of equipment is out of the scope of this document. Schneider Electric - Electrical installation guide 2008 D25 © Schneider Electric - all rights reserved
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Chapter A General rules of electrical installation design

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