40 MVA 132/22kV Substations

Without having load and demand information, this is an impossible question to answer and any answer is nothing more then a guess.

You need to design this system based on the load you need to provide for.

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Approximately 20.

Please note that this is a discussion forum, not a free engineering consultancy service. For a more detailed analysis and an answer that will suit your particular site, you MUST consult your local electrical engineering design or consultancy group for a real answer.

Dear Friend,

40MVA 132/22kV substation came up with definite analysis, demand and connected loads. Check the LV, which required 415V and below.

* Make LV load analysis based on LV demand and connected loads.

* From here, you can sum up all LV loads, then convert this to kVA or MVA

* Once you have this, divide this to 2MVA, whatever the result(s), then "YOU HAVE THE NUMBER OF 2MVA SECONDARY XFMR.

Eren

Since this is a hypothetical question, then not more than 20 secondary s- stations due to the power equation. However this is to be determined by potential drops owing to supplying close to load centres and conductor length/type as this leads to power losses.

cheers