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Power supply at medium voltage

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The term «medium voltage» is commonly used for distribution systems with voltages above 1 kV and generally applied up to and including 52 kV [1]. For technical and economic reasons, the nominal voltage of medium-voltage distribution networks rarely exceeds 35 kV.

In this chapter, networks which operate at 1000 V or less are referred to as low-voltage (LV) networks, whereas networks requiring a step-down transformer to feed LV networks are referred to as medium voltage (MV) networks.


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References

  1. ^ According to the IEC there is no clear boundary between medium and high voltage; local and historical factors play a part, and limits are usually between 30 and 100 kV (see IEV 601-01-28).The publication IEC 62271-1 "High-voltage switchgear and controlgear; common specifications" incorporates a note in its scope: "For the use of this standard, high voltage (see IEV 601-01-27) is the rated voltage above 1 000 V. However, the term medium voltage (see IEV 601-01-28) is commonly used for distribution systems with voltages above 1 kV and generally applied up to and including 52 kV."