Energy and Power
Primary distribution schemes of power plants on board of big ships
The MV primary distribution network generally consists in a three-phase system with three conductors without neutral. Such system is usually managed with the neutral of the star point isolated from earth or connected with earth through a resistance or a… Read more
Nov 16, 2015 | By Edvard Csanyi
Energy and Power
The Tesla Electric Light Company in Electrical Review, August 14, 1886
Electrical Review, August 14, 1886 – A weekly journal of electric light, telephone telegraph and scientific progress This company has been organized nearly two years, and has devoted that tittle, to perfecting a complete arc-light system, which we take pleasure… Read more
Nov 14, 2015 | By Edvard Csanyi
Energy and Power
Single-line diagram of the AC transmission and distribution system
The conductor system by means of which electric power is conveyed from a generating station to the consumer’s premises may, in general, be divided into two distinct parts i.e. transmission system and distribution system. Each part can again be sub-divided… Read more
Nov 13, 2015 | By Edvard Csanyi
Energy and Power
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 the instrument is connected. These illustrations are typical and will serve… Read more
Nov 11, 2015 | By Edvard Csanyi
Energy and Power
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 it in short, however giving the possibility to understand its… Read more
Nov 09, 2015 | By Edvard Csanyi
Energy and Power
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 the more pertinent ones are noted below. 6 rules to… Read more
Nov 07, 2015 | By Edvard Csanyi
Energy and Power
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 effectively in parallel with the neutral and can thus share… Read more
Nov 06, 2015 | By Edvard Csanyi
Protection
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 and commercial consumers will suffer great inconvenience through only a… Read more
Nov 04, 2015 | By Edvard Csanyi
Electrical Lectures
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 is based on defining the voltage at each node as… Read more
Nov 02, 2015 | By Edvard Csanyi
Energy and Power
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 followed to insure that employees are working in an electrically… Read more
Oct 31, 2015 | By Edvard Csanyi
Energy and Power
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 collection by each train, and in A.C. electrified railways as… Read more
Oct 30, 2015 | By Edvard Csanyi
Industrial Automation
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 details of each of hardware topologies: HMI based Topology RTU… Read more
Oct 28, 2015 | By Edvard Csanyi
Electric Motor
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 faults for now. This fault could be located in either… Read more
Oct 26, 2015 | By Edvard Csanyi
Energy and Power
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 be demonstrated in the design for all three-phase 4-wire circuits… Read more
Oct 24, 2015 | By Edvard Csanyi
Energy and Power
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 the main power supply solutions of an MV switchboard, regardless… Read more
Oct 23, 2015 | By Edvard Csanyi
