Testing and commissioning of MV/HV switchgears (wiring, final inspection and checks)
This article continues the series of articles dedicated to erection, testing and commissioning of MV/HV switchgears by describing the most important precautions and recommendations in various procedures and steps. Starting… Read more
Oct 28, 2020 | Edvard
Guide to erection and commissioning of MV/HV switchgears (Inspection, installation and assembly)
Erection and commissioning of MV/HV switchgear are quite complex and full of tiny little details that can easily make your project slow down or even stop. Not to mention deadlines… Read more
Oct 26, 2020 | Edvard
How hard can be analyzing MV switchgear wiring diagrams and single line diagram
The capability of reading different types of drawings is an essential skill to perform almost all of the engineering tasks. The engineering drawings form the building blocks of industry method…...
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Oct 05, 2020 | Salem Alshahrani
My experience in the first synchronization of the MV generator in an industrial plant
Any power plant commissioning, from small industrial GTG to nuclear facility, will converge to a very final step before (provisional) commercial operation, sometimes empathized as “first kW”: synchronization to local…...
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Sep 21, 2020 | Marco Bruschini
Secondary LV/MV distribution substations in a nutshell (connections and types)
The general method of supplying bulk power to buildings, factories or other complexes is by means of an MV supply, usually at 10 kV, occasionally at 6.6 kV. The installation… Read more
Aug 05, 2020 | Edvard
Installation guidelines for MV metal-enclosed switchgear and controlgear (IEC 62271-200)
What does it mean ‘metal-enclosed switchgear’? Metal-enclosed switchgear and controlgear are generally assembled from type-tested panels. As per IEC 62271-200 metal-enclosed switchgear installations must be designed so that their insulation… Read more
Jul 27, 2020 | Edvard
A case study of fault level calculations for a MV/LV network using direct method
This technical article represents the case study of fault level calculations for an MV/LV network using the direct method. There are many advantages of the direct approach, and the main…...
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Jul 19, 2020 | Sivakumar K
My experience and guidance in the design and electrification of a modern airport
The electrical systems for airports require proper quality installations and consideration for features usually not involved in other electrical installations. In this article, we will be discussing the general elements…...
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Jun 29, 2020 | Bishal Lamichhane
Primary rated values for medium voltage switchgear often mixed by engineers
It’s not unusual to see that engineers mix terms of primary ratings. If they are not understood well, yes, it’s possible to mix some of them. But it’s essential to… Read more
Jun 22, 2020 | Edvard
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
