Industrial Automation
4 Steps To Follow During Commissioning of a PLC System
Yes, PLC programs are never final, it is always possible to make corrections and subsequent adaptations to new system according the customer requirements. Even during commissioning, program changes are often necessary. The commissioning of a system can be divided into… Read more
Aug 15, 2015 | By Edvard Csanyi
Electrical Lectures
Few advice for improving integrity of protective conductor
Most modern electronic equipment uses switched mode power supplies (SMPS) which draw pulses of current from the mains supply rather than a continuous sinusoidal current. The fast rise time edges of the current waveform contain high frequencies that can cause serious radio frequency… Read more
Aug 14, 2015 | By Edvard Csanyi
Electric Motor
Comparison of Soft Starting and Frequency Converter Motor Starting
A soft starter is, as you would expect, a device which ensures a soft starting of a motor. A softstarter has different characteristics to the other starting methods. It has thyristors in the main circuit, and the motor voltage is… Read more
Aug 12, 2015 | By Edvard Csanyi
Energy and Power
10 Common Causes Of Arc-Flash and Other Electrical Accidents
The most common cause of Arc Flash and other electrical accidents is carelessness. No matter how well a person may be trained, distractions, weariness, pressure to restore power, or overconfidence can cause an electrical worker to bypass safety procedures, work… Read more
Aug 10, 2015 | By Edvard Csanyi
Energy and Power
What parallel redundancy does to the power distribution system?
Redundancy is a useful method of increasing reliability and optimising the balance between operation effectiveness and expenditure. In the context of reliability, redundancy signifies that a system will continue to function satisfactorily in spite of the failure of some of… Read more
Aug 07, 2015 | By Edvard Csanyi
Metering
Resistance measurement of non-conductive walls and floors
There are certain situations where it is desirable for a room to be totally isolated from the Protective Earth conductor (e.g. for conducting special tests in a laboratory etc.). These rooms are regarded as an electrically safe area and the walls… Read more
Aug 05, 2015 | By Edvard Csanyi
Energy Efficiency
7 key steps in lighting design process
To achieve the best overall outcome in a lighting installation, it is important to avoid the tendency of rushing straight into luminaire selection before determining more broadly what is required from the system. The use of a structured design process… Read more
Aug 03, 2015 | By Edvard Csanyi
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, but heat is a potentially serious problem because winding insulation… 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 by T-8 tubes Replace mercury lights with metal halide or… 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 this list short, I hope beginners will catch the essence… 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, rubber hose connections, valves, regulators, seals, and in old pneumatic… 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 one. According to the standard, h can generally be limited to… 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 fault between a live part and an exposed-conductive-part or a… Read more
Jul 20, 2015 | By Edvard Csanyi
Electric Motor
Comparision of Direct-on-line (DOL) and Star-delta Motor Starting
The primary challenge in starting induction motors of large or medium size is predominantly due to the necessity for a high starting current when employing direct-on-line (DOL) starting method. Consider that the distribution line comes from a substation, where the… 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. The PLC also surpassed the hazard of changing the wiring…. Read more
Jul 15, 2015 | By Edvard Csanyi
