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The consumer substation with MV metering

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General rules of electrical installation design
Connection to the MV utility distribution network
Connection to the LV utility distribution network
MV and LV architecture selection guide for buildings
LV Distribution
Protection against electric shocks and electrical fires
Sizing and protection of conductors
LV switchgear: functions and selection
Overvoltage protection
Energy Efficiency in electrical distribution
Power Factor Correction
Power harmonics management
Characteristics of particular sources and loads
PhotoVoltaic (PV) installation
Residential premises and other special locations
ElectroMagnetic Compatibility (EMC)


A consumer substation with MV metering is an electrical installation connected to a utility supply system at a nominal voltage usually between 1 kV - 35 kV, which for example may supply:

  • A single MV/LV transformer exceeding generally 1250 kVA
  • Several MV/LV transformers
  • One or several MV/LV secondary substations.

The single line diagram and the layout of a substation with MV metering depend on the complexity of the installation and the presence of secondary substations.

For example a substation may:

  • Include one single room containing the MV switchboard, the metering panel, the transformer(s) and the low voltage main distribution board(s),
  • Supply one or several transformers, each installed in a dedicated room including the corresponding main LV distribution switchboard
  • Supply one or several secondary MV/LV substations.