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 (Gas-To-Gasoline) to nuclear facility, will converge to a very final step before (provisional) commercial operation, sometimes empathized as “first kW”: synchronization to the local or national grid. This is in fact a…...
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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 comprises secondary distribution substation at the point of entry, with… Read more
Aug 05, 2020 | By Edvard Csanyi
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 capacity, degree of protection, current carrying capacity, switching capacity and… Read more
Jul 27, 2020 | By Edvard Csanyi
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 of them is that it directly uses the system single…...
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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 of electrical practices and facilities which have special significance for…...
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Jun 29, 2020 | By Bishal Lamichhane
Medium Voltage
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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 differentiate them. This technical article will try to shed some…...
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Jun 22, 2020 | By Edvard Csanyi
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 easily followed by the wiring people in the shop. One…...
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May 18, 2020 | By Ivan Contreras
Medium Voltage
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My experience in the design and installation of medium voltage switchgear
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, 7.2kV, 13.8kV, 14.4kV, 23kV, 34.5kV and so on. The design…...
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May 07, 2020 | By Amar M
Medium Voltage
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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 in most of the medium voltage switchgear. But, before diving…...
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Apr 13, 2020 | By Edvard Csanyi
Medium Voltage
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Mastering single line and wiring diagrams: Using circuit breaker for MV power factor correction
Within this article, a 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 and wiring diagrams, will be shown, while some specific aspects…...
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Apr 09, 2020 | By Miodrag Kokotovic
Medium Voltage
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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 earth fault protection applied to the same example switchgear used…...
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Mar 26, 2020 | By Miodrag Kokotovic
Medium Voltage
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Learn how to interpret interlocking schemes between MV cubicles (single line and wiring diagrams)
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…....
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Mar 12, 2020 | By Miodrag Kokotovic
Medium Voltage
Design tips for medium voltage systems and switchgear in power substations
Medium voltage networks are networks with rated voltages of over 1kV and up to 36kV. Medium voltage switchgear is used in transformer substations and switching substations, and in secondary unit substations and customer substations (in public utility networks only). This… Read more
Feb 26, 2020 | By Edvard Csanyi
Medium Voltage
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 accurately proportional to the primary current. It consists of a… Read more
Jan 20, 2020 | By Edvard Csanyi
Low Voltage
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 in starting the design process. The beginning is always the… Read more
Jan 15, 2020 | By Edvard Csanyi
