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The wiring diagram and physical layout of the equipment inside the motor...
This article will provide a description of most important equipment and working principle of a real case motor control centre (MCC). That is an usual name for a switchboard with... Read more The post...
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Medium voltage soft starter for heavy-duty motor control (operation and...
A soft starter is an electronic motor controller used on three phase medium voltage squirrel cage induction motors. During motor starting, the soft starter controls the voltage or current supplied......
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5 substation building services that usually lack of proper design (and make...
This technical article introduces five main principles involved with substation control building and switchyard services that make a lot of troubles to substation crew if poorly designed. The article...
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HV/EHV substation switching configurations, control and protection functions
The demand for power is growing rapidly due to increased industrial activities almost all across the world. Various generating sets of large ratings are being set up to meet this... Read more The post...
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How can a PLC and VFD be used for pump control (power and control circuits)
For the last several decades, every engineering task related to process control is realized by the use of PLC (Programmable Logic Controller). If we are talking about induction motor control,... Read...
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Four special connections of current transformers in relay protection...
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...
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Backup fault protection for generators in case of a failure at the generation...
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...
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Notes in preparation of an MV/LV substation civil drawings and construction...
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... Read more The post Notes...
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Why substation equipment fails and why it’s wise to think of that much before...
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,......
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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...
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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......
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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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Five switching devices you are likely to spot in most of the low voltage...
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...
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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 The post...
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Soft starter for potable water well pump (wiring diagram, troubleshooting...
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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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 The post...
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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 The post It’s time to go further. Engineers,...
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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 The...
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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...
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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 The post The problem...
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