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 problem of induced voltages in control cables in high voltage substations

Cabling in power substation is very important due to the fact that they are the longest parts of a system and therefore act as efficient antennas that pickup and or… Read more

Jan 13, 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

14 disturbance types that mess up power quality and 50/60 Hz sinusoidal signal

The quality of the electrical energy seems to be the very popular nowadays. It may be affected either by events that occur on the distribution systems (switching, lightning, etc.) or… Read more

Jan 06, 2020 | Edvard

It’s time to go further. Engineers, Happy New Year 2020!

Here comes the New Year! As 2019 is coming to an end, it is time to take a glimpse at what was, but more importantly to look forward to what… Read more

Dec 31, 2019 | Edvard

Essential fundamentals of harmonics distortion for future power quality experts

If you take a look at the past, you must notice that power system was much cleaner and straightforward. Most loads were primarily linear in nature. Linear loads draw the… Read more

Dec 30, 2019 | Edvard

Why earth leakage protection is necessary in low voltage installations

We all should know that low voltage circuit breakers and fuses operate in the event of excess current arising from overload conditions and faults. As the statistics say, the most… Read more

Dec 25, 2019 | Edvard

Five switching devices you are likely to spot in most of the low voltage switchgears

This technical article will try to shed some light on switching devices usually installed in low voltage switchgear – circuit breakers, contactors, disconnectors, load-break switches, switch disconnectors and fuses. There… Read more

Dec 23, 2019 | Edvard

The analysis of MV/LV incoming supply configurations for large industrial plants

The metal-processing industry is an excellent example where you can find specific large industrial plants. Why specific? Maybe because in such plants, there are only a few individual large loads…...

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Dec 18, 2019 | Edvard