Low Voltage
The essentials of automation applied to distribution systems via PLCs, SCADA, IEDs, and RTUs
Nowadays, it seems that everything we do tend to be somehow automated. The very same is happening in electrical distribution systems. The distribution system at the medium voltage (MV) or… Read more
Mar 15, 2021 | By Edvard
Medium Voltage ♛
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Sizing of 110V DC charger for MV panels – Auxiliary power supply in power substations
An auxiliary DC power system that consists of a charger, battery bank, DC distribution system, and monitoring system is a critical part of the primary/secondary substation. It is directly associated…...
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Feb 08, 2021 | By Bishal Lamichhane
Medium Voltage ♛
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Mastering switchgear control circuits: trip, BCPU and alarm, indication, and interlock circuits
In the last article, an introductory part of the switchgear control circuits, including DC/AC circuit and breaker closing circuit, was discussed thoroughly. This article continues the discussion with a breaker…...
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Dec 14, 2020 | By Salem Alshahrani
Medium Voltage ♛
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Mastering switchgear control circuits – AC/DC circuits and circuit breaker closing circuit
Control circuits are vital to the operation of medium voltage switchgear. The integrity of these control circuits is essential to the switchgear’s proper operation, so commissioning and maintenance activities records…...
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Nov 30, 2020 | By Salem Alshahrani
Medium Voltage ♛
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My experience in drafting the layout & arrangement drawing of 33/11 kV distribution substation
Medium voltage substations fall within the sub-transmission power system category, which feeds the bulk consumers directly or facilitates the secondary and tertiary distribution to small industrial and household consumers over…...
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Nov 17, 2020 | By Bishal Lamichhane
High Voltage
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 | By Edvard
High Voltage
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 | By Edvard
Medium Voltage ♛
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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 | By Salem Alshahrani
Energy Generation ♛
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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 | By Marco Bruschini
Low Voltage
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 | By Edvard
Medium Voltage
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 | By Edvard
Low Voltage ♛
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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 | By Sivakumar K
Low Voltage ♛
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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 | By Bishal Lamichhane
Medium Voltage
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 | By Edvard
Medium Voltage ♛
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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 | By Ivan Contreras
