The architecture design

From Electrical Installation Guide

The architecture design considered in this document starts at the preliminary design stage (see Fig. D3 step1). It generally covers the levels of MV/LV main distribution, LV power distribution, and exceptionally the terminal distribution level. (see Fig. D2).

In buildings all consumers are connected in low voltage. It means that MV distribution consists in:

  • connection to utility,
  • distribution to MV/LV substation(s),
  • MV/LV substation(s) itself.
Fig. D2 – Example of single-line diagram

The design of an electrical distribution architecture can be described by a 3-stage process, with iterative possibilities. This process is based on taking into account of the installation characteristics and criteria to be satisfied.