Connection Schemes For Testing Insulation Resistance Of Electrical Equipment
The following schemes show how to connect a Megger insulation tester to various types of electrical equipment. The schemes also show in principle how equipment must be disconnected from other circuits before… Read more
Nov 11, 2015 | By Edvard Csanyi
LV/MV Distribution In Power Plants On Board Of Big Ships
Without going into the details of the management modalities of the electric distribution or of the layout that an electrical system on board may have, it is possible to describe… Read more
Nov 09, 2015 | By Edvard Csanyi
Stop Transformer Noise With These Rules and Techniques
There are a number of basic installation precautions and transformer mounting techniques which if carefully noted and followed, will minimize the audible sound level (noise) of energized transformers. Some of… Read more
Nov 07, 2015 | By Edvard Csanyi
Electrical installations where use of TN-C-S system is prohibited
A real danger can arise when the non-current-carrying metalwork of an installation is connected to the system’s neutral, as is the case with a TN-C-S-fed system. The ground system is… Read more
Nov 06, 2015 | By Edvard Csanyi
Secondary Distribution Networks In Urban Areas
A high level of interconnection, either ring or mesh, to ensure a high degree of availability of supply to the consumer, characterises secondary distribution networks in urban areas. Domestic, industrial… Read more
Nov 04, 2015 | By Edvard Csanyi
The Node Voltage Method For Analysis Of Electric Circuits
Node voltage analysis is the most general method for the analysis of electric circuits. In this technical article, its application to linear resistive circuits is illustrated. The node voltage method… Read more
Nov 02, 2015 | By Edvard Csanyi
6 steps to establish electrically safe work condition
Equipment that has been deenergized and verified as such is said to be in an electrically safe work condition. Article 120.1 of NFPA 70E outlines six steps that must be… Read more
Oct 31, 2015 | By Edvard Csanyi
Protection of A.C. Electrified Railways
Many regional, urban and high-speed inter-urban rail networks worldwide are electrified, to provide the motive power for trains (Figure 1). The electrification system serves as the contact interface for current… Read more
Oct 30, 2015 | By Edvard Csanyi
Hardware Implementation of Substation Control and Automation
To form a substation control system, the various elements described above must be assembled into some form of topology. Three major hardware topologies can be identified as being commonly used. Let’s get into… Read more
Oct 28, 2015 | By Edvard Csanyi
Troubleshooting An Open Circuit Faults in the Control Circuit
– The machine does not start when the start button is pressed. At this point the problem could be mechanical or electrical. We will focus on just the electrical circuit… Read more
Oct 26, 2015 | By Edvard Csanyi
Balancing of single-phase loads to achieve energy efficiency
All single-phase loads, especially those with non-linear characteristics, in an electrical installation with a three-phase supply should be evenly and reasonably distributed among the phases. Such provisions are required to… Read more
Oct 24, 2015 | By Edvard Csanyi
Eight Most Common Schemes To Supply MV Switchboard
Medium voltage networks are made up of switchboards and the connections feeding them. Let’s take a look at the eight different supply modes of these medium voltage switchboards. We’ll start with… Read more
Oct 23, 2015 | By Edvard Csanyi
Basic measuring devices explained through cute simple schemes
In this technical article, you should gain a basic understanding of the desirable properties of practical devices for the measurement of electrical parameters. The measurements most often of interest are… Read more
Oct 21, 2015 | By Edvard Csanyi
Phases and wires in distribution of AC power
AC power transmission is always at high voltage and mostly by 3-phase system. The use of single-phase system is limited to single-phase electric railways. Single-phase power transmission is used only… Read more
Oct 19, 2015 | By Edvard Csanyi
4 Things Soil Resistivity Depends On
Though the ground itself being a very large body can act as an infinite sink for currents flowing into it and can be considered to be having very low resistance to current… Read more
Oct 17, 2015 | By Edvard Csanyi