The most common issues I experienced in wiring of a medium voltage switchgear

Nowadays, the design and manufacturing of a Medium Voltage switchgear is not an easy task. Many factors could affect the generation of an optimal set of engineering drawings to be…...

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May 18, 2020 | Ivan Contreras

My experience in the design and installation of medium voltage switchgears

Medium Voltage (MV) switchgear is typically any switchgear over 1000V in the United States (US). Some of the nominal voltage ratings used in the US by power utilities are 2.4-4.16kV,…...

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May 07, 2020 | Amar M

Switching devices you are likely to spot in every medium voltage switchgear

Up to and including 52 kV voltage range is generally referred to as “medium voltage”. This technical article shed some light on a few devices you are likely to spot… Read more

Apr 13, 2020 | Edvard

Mastering single line and wiring diagrams: Using circuit breaker for MV power factor correction

Within this article, custom made cubicle intended for supply and protection of MV reactive power compensation block, will be analyzed. Technical characteristics of major electrical components, together with three line…...

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Apr 09, 2020 | Miodrag Kokotovic

Mastering single line and wiring diagrams: MV earth fault protection

This technical article continues the series of articles dedicated to mastering single line and wiring diagrams of medium voltage switchgear. This time, the subject is the principle, and realization of…...

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Mar 26, 2020 | Miodrag Kokotovic

Mastering single line and wiring diagrams: Interlocking between MV cubicles

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,…...

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Mar 12, 2020 | Miodrag Kokotovic

Design tips for medium voltage systems and switchgears in power substations

Medium voltage networks are networks with rated voltages of over 1 kV and up to 36 kV. Medium voltage switchgear is used in transformer substations and switching substations, and in… Read more

Feb 26, 2020 | Edvard

IEC and NEMA/IEEE ratings of current transformers (CTs) in medium voltage applications

First, let’s remind ourselves of the basics in a few sentences. That is something you must know. A current transformer (CT) is designed to produce a secondary current which is… Read more

Jan 20, 2020 | Edvard

The story of designing the electrical part of MV/LV power substation

Designing a new MV/LV distribution substation is somewhat complicated and involves a lot of factors you must take care of. This technical article will try to present the essential steps… Read more

Jan 15, 2020 | Edvard

The art of arc-protection relaying in MV applications

Arc-flash detection relays are superior and provide much faster arc-flash detection times compared to the differential relays. With modern arc-flash detection technology, this detection time is of the order of…...

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Jan 08, 2020 | Edvard