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Home / Technical Articles / Learn how to analyse and check factory wiring diagrams of a MV switchgear

Introduction to wiring diagrams

As already written earlier regarding LV switchboard, wiring diagrams are used to show control and signalization principle of operation inside switchboard. Usually they are given in form of electrical circuits between two lines which are representing control voltage potentials.

Learn to analyse and check factory wiring diagrams of a MV switchgear
Learn to analyse and check factory wiring diagrams of a MV switchgear

Of course, various types of signals can be transferred outside switchboard, for the purpose of measuring, monitoring, or control, i.e. to be used for SCADA applications.

Within this article, we will be talking about wiring diagrams inside medium voltage (MV) switchgear. Basically, same rules and principles apply here as well.

However, there are some differences related to the fact that in the case of MV applications, primary equipment operates at medium voltage level, while control and signalization circuits are always of low voltage type.

An example of wiring diagram related to MV equipment will be given and discussed later within the article.


Table of content:

  1. The basics of MV switchgear
  2. Example of MV switchgear wiring diagram

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Miodrag Kokotovic

Graduated from Faculty of Electrical Engineering, within University of Belgrade, in the field of electrical power systems. Expert in electrical part of tender preparation, design, procurement, construction and commissioning of treatment plants and pumping stations, electrical power quality and energy management.

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