Electrical Lectures
Practical Considerations of Transformer Heat and Noise
In addition to unwanted electrical effects, transformers may also exhibit undesirable physical effects, the most notable being the production of heat and noise. Transformer noise is primarily a nuisance effect,… Read more
Jul 31, 2015 | By Edvard Csanyi
Energy Efficiency
7 energy-efficiency improvement opportunities in lighting system
There are a lot of opportunities to optimise lighting system in (almost) any industrial facility. Seven practical energy-efficiency opportunities to reduce energy use cost-effectively are given below: Lighting controls Replace T-12 tubes… Read more
Jul 29, 2015 | By Edvard Csanyi
Energy and Power
13 Basic expressions often used in electrical testing
This is the simple list of basic terms you can often hear when testing and measurements of electrical installation (in general) is being performed. While experienced electrical engineers will find… Read more
Jul 27, 2015 | By Edvard Csanyi
Energy Efficiency
Eleven energy-efficiency improvement opportunities in compressed air systems
Instrumentation consumes large amounts of compressed air at many individual locations in a textile plant, but these uses are susceptible to leakage. Most such leaks are at threaded connection points,… Read more
Jul 24, 2015 | By Edvard Csanyi
Electrical Lectures
Essential Basics of Total Harmonic Distortion (THD)
For a signal y, the total harmonic distortion (THD) is defined by the equation: This definition complies with that of standard IEC 61000-2-2. Note that the resulting value may exceed… Read more
Jul 22, 2015 | By Edvard Csanyi
Energy and Power
Two Circuit-Breaker Types For Automatic Disconnection Of the Supply
The Standard IEC 60364 prescribes automatic disconnection of the supply for protection against indirect contact. The protective device shall automatically disconnect the supply so that, in the event of a… Read more
Jul 20, 2015 | By Edvard Csanyi
Electric Motor
Comparision of Direct-on-line (DOL) and Star-delta Motor Starting
Direct-on-line (DOL) starting Advantages Drawbacks Star-delta starting Advantages Drawbacks Comparision of DOL and Star-delta starting As the name suggests, direct-on-line starting means that the motor is started by connecting it… Read more
Jul 17, 2015 | By Edvard Csanyi
Electrical Lectures
What can a PLC do? Why do we use them?
“PLC” means “Programmable Logic Controller”, that’s clear. The word “Programmable” differentiates it from the conventional hard-wired relay logic. It can be easily programmed or changed as per the application’s requirement…. Read more
Jul 15, 2015 | By Edvard Csanyi
Cables
Differences in size and weight of equipment using copper and aluminium conductors
It is a common misconception that electrical equipment built using aluminum conductors will always be larger than the same equipment using copper conductors. While the actual conductor within the equipment… Read more
Jul 13, 2015 | By Edvard Csanyi
Energy and Power
MV Metal-Enclosed Switchgear and Loss of Service Continuity (LSC) Categories
Some parts of a switchgear may be made accessible for the user, for various reasons from operation to maintenance, and such an access could impair the overall operation of the… Read more
Jul 10, 2015 | By Edvard Csanyi
Energy Efficiency
Maintenance of electrical equipment in buildings
Apart from safety, maintenance is needed to keep plant in an acceptable condition. Maintenance of this kind must be reviewed on an economic and energy efficiency basis. While it is… Read more
Jul 08, 2015 | By Edvard Csanyi
Industrial Automation
Let’s develop the simple PLC program for lighting control system
A lighting control system is to be developed. The system will be controlled by four switches, SWITCH1, SWITCH2, SWITCH3, and SWITCH4. These switches will control the lighting in a room… Read more
Jul 06, 2015 | By Edvard Csanyi
Medium Voltage
Medium Voltage Earthing Systems – Arrangements and Comparison
First, let’s define the different medium voltage earthing systems and then compare the advantages and disadvantages of each one. Earthing systems in medium voltage can be differentiated according to the… Read more
Jul 03, 2015 | By Edvard Csanyi
Electrical Lectures
4 Main Means For The Generation Of Reactive Power
The four main means for the generation of reactive power are: synchronous alternators, synchronous compensators (SC), static var compensators (SVC) and banks of static capacitors. Contents Synchronous alternators Synchronous compensators… Read more
Jun 29, 2015 | By Edvard Csanyi
Testing and Commissioning
12 Transformer Factory Tests Briefly Explained
The remainder of the twelve factory tests are briefly summarized below. The details of the test set connections and formulas of some of the listed tests are already described in… Read more
Jun 29, 2015 | By Edvard Csanyi
