Cables
The problem of induced voltages in control cables in high voltage substations
Cabling in power substations 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 | By Edvard
Medium Voltage ♛
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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 | By Edvard
Energy and Power
14 disturbance types that mess up power quality and 50/60 Hz sinusoidal signal
The quality of electrical energy seems to be very popular nowadays. It may be affected either by events that occur on the distribution systems (switching, lightning, etc.) or by the… Read more
Jan 06, 2020 | By Edvard
Energy and Power
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 | By Edvard
Energy and Power
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 | By Edvard
Industrial Automation ♛
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Soft starter for potable water well pump (wiring diagram, troubleshooting example)
This article will analyze a real example of an electrical switchboard for a potable water well pump, containing a soft starter as one of the major components. Besides the explanation…...
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Dec 27, 2019 | By Miodrag Kokotovic
Energy and Power
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 | By Edvard
Low Voltage
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 | By Edvard
Medium Voltage ♛
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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 | By Edvard
Electric Motor
The basics of fault protection for medium voltage motors
In principle, the protection of medium voltage motors is similar to low voltage motors, but the requirements are more demanding. Being closer to the utility source, medium-voltage motors are more… Read more
Dec 16, 2019 | By Edvard
Low Voltage ♛
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Where and why you should use thyristor switched reactive power compensation
Various aspects of reactive power compensation problems have already been mentioned in previous articles. However, because of consistency of this article, we will remind ourselves briefly on basic terms and…...
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Dec 12, 2019 | By Miodrag Kokotovic
Power Substation
Why substation equipment fails and why it’s wise to think of that much before failure
This technical article will try to shed some light on why and how electrical equipment fails and what’s happening before and during the failure of particular substation equipment like switchgear,… Read more
Dec 09, 2019 | By Edvard
Power Substation ♛
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Notes in preparation of an MV/LV substation civil drawings and construction layout
MV/LV substations are not only a point of supply but also provide a means of network isolation in the event of faults or emergencies. In that manner, a detailed substation…...
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Dec 05, 2019 | By Edvard
Energy Generation
Backup fault protection for generators in case of a failure at the generation station
It is a common practice to use the differential relay as primary fault protection for the generator. Backup fault protection is also highly recommended to protect the generator from the… Read more
Dec 04, 2019 | By Edvard
Metering
Four special connections of current transformers in relay protection applications
As you should already know, current transformers are used for metering and relay protection purposes. When we are talking about current transformers used for metering, their performance is of interest… Read more
Dec 02, 2019 | By Edvard
