Electrical Lectures
6 not-that-easy-to-understand terms related to a power transformer you should understand
There are many terms related to the power transformer operation that can be easily visualized which are especially important for students, like for example transformer construction or regular working principle. On the other hand, there are few not that easy… Read more
Jan 21, 2019 | By Edvard Csanyi
Electrical Lectures
The basic understanding of an earthing protection system (diagram and definitions)
As you already know, protective conductors are the main part of every earthing protection system, but the complexity of the system will increase with the requirements of information technology, voltage surge protection, local area networks, etc. with the risk of… Read more
Jan 16, 2019 | By Edvard Csanyi
Electrical Lectures
The basic things about substations you MUST know in the middle of the night!
To explain in very simple words, I would say that substation is a bunch of electrical devices gathered and connected in one place. On top are clever electrical devices who control and protect others in order to everything work properly…. Read more
Jan 09, 2019 | By Edvard Csanyi
Electrical Lectures
The Essentials Of Current Transformers In Power Circuits (Theory and Practice)
If the voltage or current in a power circuit are too high to connect measuring instruments or relays directly, coupling is made through transformers. Such measuring transformers are required to produce a scaled down replica of the input quantity to… Read more
Dec 03, 2018 | By Edvard Csanyi
Electrical Lectures
What is polarity and why it’s important for transformers and protection relays
Polarity is very important for the operation of transformers and protection equipment. A clear understanding of polarity is useful in understanding and analyzing transformer connections and operations as well as testing protection relays and systems. It’s also essential in understanding… Read more
Nov 19, 2018 | By Edvard Csanyi
Electrical Lectures
Power transformer protection relaying (overcurrent, restricted earth fault & differential)
The problems relating to transformer temperature rise above an assumed maximum ambient temperature require some means of protection. Let’s summarize the problems and the possible forms of transformer protection that may be used. The considerations for a transformer protection vary… Read more
Nov 12, 2018 | By Edvard Csanyi
Electrical Lectures
Biased-differential protection theory and application
The term biased-differential or percentage differential is based on the fact that the operating threshold increases with the through current. Because of that, comparison of upstream and downstream currents in the same phases is not convenient for transformer differential protection…. Read more
Oct 22, 2018 | By Edvard Csanyi
Electrical Lectures
Lecture Notes In DC Electric Sources and Principles Of Electrical Circuits
DC sources refer to sources of electrical energy which are associated with constant voltages and currents. A DC power supply can be constructed as an electronic circuit operating from the ac mains electricity supply and designed for purpose. Alternatively it… Read more
May 16, 2018 | By Edvard Csanyi
Electrical Lectures
Solve These Ten DC Circuits and Train Your Brain!
I guess you’re still recovering from an awesome lunches and dinners you’ve had during holidays. Well, now when it’s over – it’s a good moment to plug yourself back and shake your brain cells! Assuming that you’re very familiar with… Read more
Jan 04, 2018 | By Edvard Csanyi
Electrical Lectures
Current Systems (AC/DC) And Voltage Levels Basics You Must Never Forget
There are many electrical engineering basics you really must know at any time, even in the middle of the night! The basics we will discuss here are current systems and voltage levels in transmission and distribution systems. Contents: Current Systems… Read more
Nov 29, 2017 | By Edvard Csanyi
Electrical Lectures
11-step procedure for a successful electrical circuit design (LV project example)
Let’s take an example of electrical circuit design. A consumer lives in a bungalow with a detached garage and workshop, as shown in Figure 1. The building method is traditional brick and timber. The mains intake position is at high… Read more
Jul 19, 2017 | By Edvard Csanyi
Electrical Lectures
Easy understanding of 3-phase transformer connections (Delta–Delta, Wye–Wye, Delta–Wye and Wye–Delta)
Three-phase voltage transformations can be accomplished by using three phase transformers, which are single devices with all windings constructed on a single iron core. They also can be accomplished by using three single-phase transformers that are connected externally to form… Read more
Jul 14, 2017 | By Edvard Csanyi
Electrical Lectures
How to calculate number of steps & reactive power of the capacitor banks
Depending on the size of a compensation unit, it is assembled with capacitors of equal size (in bigger units) or of different size. A unit with a total reactive power of, for example, 300 kvar consists of six power capacitors,… Read more
May 17, 2017 | By Edvard Csanyi
Electrical Lectures
How good are you at reading electrical drawings? Take the quiz.
Every electrician, in every branch of electrical work, will need to consult and understand the information presented on electrical drawings to locate the various outlets, the routing of circuits, the location and size of panelboards, and other similar electrical details…. Read more
Apr 05, 2017 | By Edvard Csanyi
Electrical Lectures
What is the complex power and how it figures in power analysis
Considerable effort has been expended over the years to express power relations as simply as possible. Power engineers have coined the term complex power, which they use to find the total effect of parallel loads. Complex power is important in… Read more
Mar 17, 2017 | By Edvard Csanyi
