MV dual fed switchboard with 2/3 type transfer
MV dual fed switchboard with 2/3 type transfer

Connected to article: Example of standard MV/LV network structure

Network structure:

  • MV consumer substation;
  • The main MV switchboard can be backed up by a generator set and it feeds two MV/LV transformers;
  • MV switchboard can be GIS or AIS and consist of following cubicles:
    – two incoming feeders (from utility)
    – two transformer cubicles
    – bus riser and bus coupling cubicle(s)
    – two outgoing transformer cubicles (supplying LV switchboard)
    – two cubicles connected to generators for backup power supply
  • The main low voltage switchboard has a dual power supply with coupler
  • Each bus section of the main low voltage switchboard has a UPS system feeding a priority circuit
  • The secondary switchboards, terminal boxes and motor control centers are fed by a single source

Reference: Protection of Electrical Networks – Christophe Prévé 

About Author //


Edvard Csanyi

Edvard - Electrical engineer, programmer and founder of EEP. Highly specialized for design of LV high power busbar trunking (<6300A) in power substations, buildings and industry fascilities. Designing of LV/MV switchgears.Professional in AutoCAD programming and web-design.Present on


  1. Mahmoud khalil
    Dec 22, 2016

    Thanks, for your article, please give us more design details,

  2. John chandra
    Apr 26, 2015

    Very good articles and lessin for engineer

  3. Nidal otti
    Dec 01, 2014

    This is vere good

    • Nidal otti
      Dec 01, 2014

      I want to to know what are you have a new in mv

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