Electrical Lectures
What is an inductor and how it works (facts you must NEVER forget)
We have all heard the term Inductor many times, but what is it? Well, it is a passive element designed to store energy in its magnetic field. Inductors find numerous applications in electronic and power systems. They are used in… Read more
Nov 30, 2016 | By Edvard Csanyi
Energy and Power
Troubleshooting dead circuit by testing continuity with disconnected supply
Dead circuit testing is testing performed with the power disconnected from the circuit. The main benefit of disconnecting power supply while tests with an external energy source are performed is to eliminate hazardous risks to the environment or the person… Read more
Nov 28, 2016 | By Edvard Csanyi
Energy and Power
3 good ways to improve earth electrode resistance
When you find that your earth electrode resistance is not low enough, there are several ways you can improve it: Lengthen the earth electrode in the earth Use multiple rods Treat the soil As you might suspect, driving a longer… Read more
Nov 25, 2016 | By Edvard Csanyi
Energy and Power
5 transformer fault conditions and how to protect from them
A number of transformer fault conditions can arise practically in any time following some special situations. These include the following five most common internal faults and few external: earth faults, core faults, interturn faults, tank faults, and external factors. Table… Read more
Nov 23, 2016 | By Edvard Csanyi
Energy and Power
Protection from fault current by automatic power supply disconnection
The use of protective conductors linking all the exposed conductive parts of all equipment creates a circuit called the “fault loop” designed for circulation of the fault current that arises following an insulation fault. The fault current may or may… Read more
Nov 21, 2016 | By Edvard Csanyi
Electric Motor
Traditional Star-Delta motor starting method used in practice
Due to their simplicity, robustness and cost-effectiveness, squirrel cage motors are the preferred choice of industry. During start-up, they develop currents of up to approximately 8 times the rated current and the high starting torque linked to this. The high… Read more
Nov 18, 2016 | By Edvard Csanyi
Energy and Power
How capacitors improve the power factor and how to calculate them?
It’s quite simple. By installing capacitors or capacitor banks. Improving the power factor of an electrical installation consists of giving it the means to “produce” a certain proportion of the reactive energy it consumes itself. The capacitor is most frequently… Read more
Nov 16, 2016 | By Edvard Csanyi
Energy and Power
Installation tips for prefabricated busbar systems and cables
The term installation configuration, when applied to prefabricated busbar systems and cables – power transport and power distribution in the installation, essentially refers to the geometric requirements of the conductor routing that will have to be taken into consideration. Adaptability… Read more
Nov 14, 2016 | By Edvard Csanyi
High Voltage
High voltage station – Design, construction and commissioning process
Having selected the right site location for high voltage station, the design construction and commissioning process would broadly follow the steps shown in Figure 1. Recent trends in utilities have been toward sourcing design and construction of HV stations through… Read more
Nov 11, 2016 | By Edvard Csanyi
Energy and Power
Do you know what an arc flash is? If not, keep reading, it’s important.
An Arc Flash is an electrical explosion resulting from a low impedance connection to ground or another voltage phase in an electrical system. High temperatures cause rapid heating of surrounding air and extreme pressures, resulting in an arc blast. The… Read more
Nov 09, 2016 | By Edvard Csanyi
Energy and Power
6 lockout operations every electrician MUST perform and respect
The lockout operations or safety procedures are precisely and clearly defined operations, the aim of which is always to ensure that situations are, and remain, safe. This will enable people to work on all or part of an installation (or… Read more
Nov 07, 2016 | By Edvard Csanyi
Energy and Power
Line harmonic currents created by adjustable frequency control
Nonlinear loads like adjustable frequency controls create line harmonics when connected to the AC power distribution system. These harmonic currents are a result of non-sinusoidal current, which is a characteristic of all adjustable frequency controls using diodes or silicon controlled rectifiers (SCRs)… Read more
Nov 05, 2016 | By Edvard Csanyi
Energy and Power
Using Megger tester for these 3 types of insulation resistance tests
You know that good insulation has high resistance and poor insulation relatively low resistance. The actual resistance values can be higher or lower, depending upon such factors as the temperature or moisture content of the insulation (resistance decreases in temperature… Read more
Nov 04, 2016 | By Edvard Csanyi
Industrial Automation
3 easy measures for a good PLC system maintenance
Why need for PLC system maintenance when they are designed to be easy to maintain and to ensure trouble-free operation? Well, several maintenance aspects should be considered once the system is in place and operational. Certain maintenance measures, if performed… Read more
Nov 02, 2016 | By Edvard Csanyi
