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Home / Technical Articles / Mastering single line and wiring diagrams: Interlocking between MV cubicles

MV switchgear & control issues

There are numerous variations of MV switchgear topology, measurement, and control logic. However, there are also some basic rules related to these aspects which may be frequently seen in practice, with the purpose of increased safety and reliability during operation. Within this article, the real example of MV switchgear with two main busbar sections will be described.

Mastering single line and wiring diagrams: Interlocking between MV cubicles
Mastering single line and wiring diagrams: Interlocking between MV cubicles

Most of the attention will be given to concrete practical solutions related to some control issues. This subject will be illustrated by use of adequate single line and wiring diagrams.


Example of MV switchgear

Switchgear which is the subject of this example is installed inside MV/LV substation, and serving for power supply of new factory of construction steel products. There are eight MV/LV power transformers in total, with rated power of 3.5 MVA each.

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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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