Lessons I learned during installation and wiring of LV switchboard
Let’s start with some basic definitions from the United States National Electrical Code (NEC). An LV switchboard is generally defined as a large single panel, frame, or assembly of panels…...
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Advices in choosing the right neutral earthing system for your installation
The choice of a neutral earthing system is dependent on requirements and objectives that are often contradictory to such an extent that sometimes several systems have to be created within… Read more
Feb 03, 2020 | Energy and Power
Eight criteria you should consider when choosing the right MV/LV transformer type
Although there are few common-sense rules that every electrical engineer follow when choosing the transformer type, it’s always a good idea to name the most important of them. This technical… Read more
Jan 29, 2020 | Power Substation
Connections and composition of LV/MV/HV capacitor banks
Compensation capacitors are installed in numerous locations in electrical installations. They are to be found in high voltage transmission and distribution systems, in transformer substations and also at various levels… Read more
Jan 27, 2020 | Energy and Power
How does low voltage protection unit work and what’s the most important to understand
If we are talking about LV applications, protection (or trip) unit is functional part of circuit breaker, and in most cases, they are physically integrated in the same housing as…...
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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 | Medium Voltage
How to avoid common mistakes during wiring and startup of power factor correction (PFC) cubicle
Power factor correction (PFC) and reactive power compensation (RPC) are often used as synonyms in practice. Although they are similar and mutually dependent terms, they don’t represent the same thing…....
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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 | Low Voltage
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 | Cables
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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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 | 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 | 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 | Energy and Power
Soft starter for potable water well pump (wiring diagram, troubleshooting example)
This article will analyse a real example of electrical switchboard for potable water well pump, containing soft starter as one of major components. Besides explanation of wiring diagram and working…...
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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 | Energy and Power
