Premium Membership ♕

CYBER WEEK OFFER 💥 Save 20% on PRO Membership Plan and Video Courses with the coupon CYM23 and learn from experienced engineers.

Home / Download Center / Electrical Engineering Books and Technical Guides / Power substation guides / MV/LV transformer substations (2000kVA or two 1000kVA)

MV/LV transformer substations

The subject of this Technical Guide is MV/LV transformer substations. In accordance with the reference standard, the discussion will be limited to substations with installed power limited to 2000 kVA or two 1000 kVA MV/LV transformers.

Guide to MV/LV transformer substations (2000 kVA or two 1000 kVA)
Guide to MV/LV transformer substations (2000 kVA or two 1000 kVA) – photo credit:

The purpose of this guide is to give an overview of the guidelines and requirements specified by current regulations for the design and construction of substations in order to guide the designer and the user to the correct system choices.

The document will only touch on a few topics such as the thee sizing of the earthing system and the building aspects, for further details on which you are referred to the specific regulations. Lastly, the document does not deal with issues related to active users, in other words those that produce alternating current electricity with parallel operation (even temporary) with the network.

Connection diagram between the Distributor's substation at the user site and the User's passive system
Connection diagram between the Distributor’s substation at the user site and the User’s passive system (click to expand)

Structure of the substation

These substations are for the most part located in the in the actual premises of the establishment that they supply and basically consist of three distinct room, of which the first two are available to the Distributor:

Distributor room (D)

Where the switching devices of the Distributor are installed. This room must be large enough to allow for possible construction of the incoming-outgoing system that the Distributor is entitled to implement, even at a later stage to satisfy new requirements.

The delivery room houses the sampling point that represents the boundary and the connection between the public grid and the user installation.

Metering room (M)

Where the metering equipment is located. Both of these rooms must be accessible from a public road, to allow maintenance by authorized personnel regardless of whether the User is present.

Transformer substation layout (example)
Transformer substation layout (example)

User room (U)

Intended to contain the MV and LV switchgear and protection devices of the User. This room must normally be adjacent to the other two rooms.

Title:Guidelines to MV/LV transformer substations for passive users – ABB
Size:3.0 MB
Download:Here 🔗 (Get Premium Membership) | Video Courses | Download Updates
Guidelines to MV/LV transformer substations for passive users - ABB
Guidelines to MV/LV transformer substations for passive users – ABB

Premium Membership

Get access to premium HV/MV/LV technical articles, advanced electrical engineering guides, papers, and much more! It will help you to shape up your technical skills in your everyday life as an electrical engineer.
50% Discount 💥 - Save 50% on all 90+ video courses with Enterprise Membership plan.

More Information


  1. akram ashmawy
    Jan 27, 2019

    the tiltle is something , while the contents is something different.

  2. Javed Iqbal Farooqui
    Jul 13, 2016

    Dear sir,
    I want to know that in 33/11 kv sub-stn.1x2MVA transformer, the out going 11kv feeders are two nos.
    how much 11/0.433 200 kva distribution transformer are recommended to installed on each feeder.
    please define in detail.

    Javed I farooqui
    Eect. engineer & A-Class elect. contractor.
    Bhopal. M.P. INDIA

    • Sharad
      Jun 26, 2017

      Dear Javed,
      Considering loading factor of 50%, you can connect 10 nos 200kVa Transformers on each of 11kV Feeders, however with necessary protection coordination,

      Sharad 7769957630

Leave a Comment

Tell us what you're thinking. We care about your opinion! Please keep in mind that comments are moderated and rel="nofollow" is in use. So, please do not use a spammy keyword or a domain as your name, or it will be deleted. Let's have a professional and meaningful conversation instead. Thanks for dropping by!

fifteen  ⁄    =  three

Learn How to Design Power Systems

Learn to design LV/MV/HV power systems through professional video courses. Lifetime access. Enjoy learning!

Subscribe to Weekly Newsletter

Subscribe to our Weekly Digest newsletter and receive free updates on new technical articles, video courses and guides (PDF).
EEP Academy Courses - A hand crafted cutting-edge electrical engineering knowledge