Energy and Power
Reactive power compensation in electrical plants with generators
Compensation of reactive power applied in buildings or small facilities operates in the first and second quadrants of the coordinate system. Increasingly, complex industrial plants, for example plants burning wood dust, are using generators driven by steam engines running parallel… Read more
Oct 30, 2019 | By Edvard Csanyi
Energy and Power
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Power supply conceptual schemes for small, medium-sized and large industrial plants
This technical article presents preferred system structures and power supply concepts for small, medium-sized and large industrial plants that meet the different requirements for power demand and supply quality. For each plant size, Siemens’s LV/MV distribution switchgear and distribution transformer…...
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Oct 22, 2019 | By Edvard Csanyi
Energy and Power
Standard cubicle configurations for a medium voltage metal-enclosed switchgear
This technical article will shed some light on the standard design of medium voltage metal-enclosed switchgear cubicles in terms of enclosure configurations as well as the characteristics of busbar system. Article explains the following cubicles types: incomer feeder, direct incomer,… Read more
Oct 21, 2019 | By Edvard Csanyi
Energy and Power
Occurrence and detection of an earth fault in MV power systems with isolated neutral
The mode of operation of an MV industrial power system that is galvanically isolated from the public power supply is determined by the method of neutral earthing on the secondary side of the transfer transformer. The following methods of neutral… Read more
Oct 14, 2019 | By Edvard Csanyi
Energy and Power
Medium voltage switches for isolation and earthing (applications and IEC 62271 ratings)
Medium voltage switches for use on 1-52kV indoor systems are predominantly used for isolation and earthing. Although the majority of these switches are air insulated, gas insulated (SF6) combination switches are available, which are designed for load and fault current… Read more
Oct 09, 2019 | By Edvard Csanyi
Energy and Power
The art of achieving selectivity between incoming feeders connected in parallel
Calculating selectivity between incoming low voltage feeders connected in parallel is never an easy task. In parallel operation of two, three and more transformers on a common busbar, the partial short-circuit currents flowing in the individual incoming feeders add up… Read more
Oct 07, 2019 | By Edvard Csanyi
Energy and Power
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Good practice rules for electromagnetic compatibility (EMC) of LV conductors
The search for an overall optimization of the installation with regard to electromagnetic compatibility (EMC) and its ability to function without suffering or emitting excessive interference, comes via a set of good practices, which are often simple and based on…...
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Sep 30, 2019 | By Edvard Csanyi
Energy and Power
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Why we find temperature so important everywhere in electrical engineering?
The purpose of this article is to underline and illustrate the importance of temperature for various aspects of electrical engineering. This is one of the crucial engineering issues from the very beginning in design and procurement stage, later during exploitation,…...
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Sep 20, 2019 | By Miodrag Kokotovic
Energy and Power
Operating centralized automatic compensation systems when supplying linear loads
For energy-efficient operation of decentralized multiply-fed industrial networks, each load-centre substation must have its own centralized reactive-power compensation system for automatic PF correction. The automatic reactive-power compensation systems used for load-related control of the reactive power comprise a PF controller… Read more
Sep 16, 2019 | By Edvard Csanyi
Energy and Power
The facts about modern rotary and static uninterruptible power systems (UPS)
This technical article covers the brief explanation of the power quality issues with the reference to the past as well as two main types of modern UPS systems – rotary and static uninterruptible power systems, their characteristics, advantages and disadvantages…. Read more
Sep 04, 2019 | By Edvard Csanyi
Electrical Lectures
Reactive power and power factor correction essentials to ALWAYS keep on mind
Why reactive power and power factor correction are so important? Well, for experienced engineers, this is not the question but the fact. For young students who meet this matter and terms for the first time, it’s important to explain the… Read more
Sep 02, 2019 | By Edvard Csanyi
Energy and Power
What do you need for short-circuit calculations? The less you assume, the better!
If you ask any electrical design engineer what is the most time consuming and critical required in short circuit analysis, he/she would say that it’s obtaining available data. The less data that is assumed, the better and more accurate the… Read more
Aug 21, 2019 | By Edvard Csanyi
Energy and Power
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Six beautiful animals that cause interruptions and hazards to electric utilities
Animals are one the largest causes of customer interruptions for nearly every electric utility worldwide, right after human and other factors. Problems and mitigation techniques are as varied as the animals involved. Identifying and addressing physical root causes is often…...
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Aug 19, 2019 | By Edvard Csanyi
Energy and Power
Practical modifications of MV/LV radial distribution systems applied in buildings
This technical article covers low voltage and medium radial distribution systems with their practical modifications: loop-primary system – radial secondary, primary selective system – secondary radial and two-source primary – secondary selective system. This discussion covers the last three modifications… Read more
Aug 14, 2019 | By Edvard Csanyi
Energy and Power
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Top five software types that LV design engineers MUST know how to work with
Back in the early days, engineers weren’t able to use software tools for the purpose of drawing, calculation, and design. So, how did they do it? Prior to the software era, drawings were made manually, using ink and paper, while…...
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Aug 08, 2019 | By Miodrag Kokotovic
